yeah good idea but expensiv...
these green 30x30 are too small right?
If it was my machine I think they would be the double-width ones. But I might go with 45x45 verticals.
ok. The real problem eith this project is the money :P
Looking at it, you will need the links between the Y slide and the X uprights to be slotted brackets as shown, there is no chance that the spacing between the X-slides will be exactly right.
I'll say this its different
I think you are right. It is better to be a little bit flexible
flexxxv_ have you looked at this machine's design yet? http://www.mechmate.com/
I prefer "adjustable" in this context.
yeah adjustable is better :D. nice machine :D
flexxxv_ I could see a blend of how they do it with your frame making some more mechanical sense
The mechmate is a good machine, but has a proportionally small Z travel compared to flexxxv_ machine
andypugh yeah just raise up the X
yes, ok I have to sleep. I will fix the mchine tomorrow and ask the company for a good price :D
(for the alu profiles)
andypugh his Z is going to come down off that gantry anyways so I don't see what he's gaining by having them leads mid way
No, I was wondering where the leadscrews should go.
pushing closer is always better I think
thanks at all for helping me. I sleep no :D
I think they would be best at the average cutting height, actually, where the loads on the top and bottom slides will be equalised
pushing from further away you risk racking
do it right and I don't see why you'd even need those bottom linears
I've an idea for a machine with a frame like this one but completely different axises
So have I, now :-)
well I've had my idea for a while now and I wouldn't go for this kind of height as i don't need it
but I think this guy just about got it on his X axis http://www.joescnc.com/themachines-hybrid.php
just raise that X axis up overhead
Hmm, move the slides back together, but up to the top. Then stagger them in the direction of travel, and have an extended carriage....
(I want to have the slide units a long way apart in the X-direction.)
joes all have widely spread X's
Actually, putting them end-to-end would work. Then a long carriage, with each slide keeping to its own track.
I just don't like how he has the risers coming up off the X
[00:17:53] <pfred1> http://www.joescnc.com/gallery/albums/Joe%27s%20Hybrid%20Machines/KeeWay.jpg
and I'd lay my Y down like the X too
Dave911: have a few questions when you got time
Well, I think to an extent it makes sense to have the leadscrews and slides in the plane of cutting, where the forces originate
Dave911: who is your daddy, and what does he do?
andypugh but then you're transferring those forces up and down
I hope flexx doesn't order yet, this thing needs more thought.
I am not seeing what it gains you
push the damned gantry!
No, you push the tool, through the medium of the gantry.
look rube the gantry moves the tool has to move with it
I'm just not seeing how having risers helps any
With Joe's design the tool can't exert any torque on the slideways, preventing racking.
its just throwing more parts in there
he has two leads so he has live fulcrums
the lead is right on each end point
sure a thread is just a lever in the round
Yeah, I can't deny that, i wrote it in a FAQ 20 years ago.
sorry i missed reading it
Just a list of ways to get damaged bolts out of cars and bikes.
easy outs aren't?
easy outs aren't easy even?
pfred1: a thread reminds me more of a "Schiefe Ebene" slanted plane, wrapped around a stick
ramp, that's the english word i could not think of using instead
[00:25:38] <andypugh> http://www.bodgesoc.org/fastners.faq
leadscrews are ramps or wedges
morficmobile yes but there is leverage in the axis
"A wedge wrapped round a cylinder"
toastydeath if there wasn't some mechanical advantage going on there is no way you could jack with a screw
a wedge is one of the simple machines.
so yes, there's mechanical advantage
but you might as well call it a pulley if you're going to call it a lever
pulleys are levers
if you define any simple machine as a lever to make your argument that a leadscrew is a lever, then you've just completely trashed any usefulness the word has
Anyway, I don't think we are going to agree on the best possible design for a machine tool tonight, so I am going to bed.
in all torque math, there is a lever, be it imaginary or real
toastydeath but i called it a fulcrum
20:22 < andypugh> "live fulcrums"?
torque is not part of the operation of a lever
it is only part of the operation of a leadscrew because the wedge is now wrapped around a shaft
the mechanical advantage is in linear movement
you can take anything out of context and make a mockery of it
*lever = wedge
sorry, i didn't mean to say levers have no torque
it's not out of context, i just tried to make the simple correction that it's not a lever
toastydeath point taken but in the context of the earlier discussion the lead acts like a fulcrum to the gantry
oh, sorry, i didn't see the rest of the conversation, just the screw part
and to think when archimedes invented the screw all he was thinking about was pumping water
I love this one i want to make one someday just to see it work: http://www.columbia.edu/cu/physics/demo-images/2-Fluid%20Mechanics/2B60-1_1_archimedes_screw.jpg
* morficmobile would love to see why Vericut thinks this A24 boring bar with a Dmin won't fit into a 2.280 bore when none of the moves go below X2.180
Dmin of 1.76"*
ugh, he used an angle of 120deg. on a HTS drill (consider it 180deg.) and "no animation" was hiding the slug that left and my tools "crashed into"
you know, considering wants to build his own machine down the road, i should pay attention to the small machines y'all build and just multiply the sizes, still using the same considerations though
morficmobile how goes the conversion?
morficmobile most designs don't scale
Valen: it's not a conversion yet, but boss chose EMC2 as control now, from here on out our profit sharing will go into this budget, once it's finalized
still no set prices and drives, but he liked idea of new drives/servos, since we can bench test those w/o disturbing the machine, less downtime
you know, flap masking tap forward and backward and all that
morficmobile it is fun to do
morficmobile and many a horror tale is told of tuning on machines!
we were talking about maybe beefing up some of the weaker machines, boss said we might need to get a remote, i told him that should not be a problem to hit start from outside the building :P
what is going to kill me is actually sitting there doing nothing until budget is made, funded and parts ordered
nah what kills you is when parts are ordered and you have to wait for them
or when they come in but you are off shift and can't do anything with them?
I'd suggest getting a few bits and bobs togther, mainly just the PC, so you can get it all installed and running sims
you can start working out the changes in your toolchain then
you are probably pretty confident on the hardware side of things
I wonder if there's a support group I can join for people with a tool addiction?
I bought this crappy pair of pliers today even when I knew i didn't need a pair of pliers i just felt so compelled
but there they were in this case flat box in a thrift store for 50 cents and i had to bring them home to clean them up
I'm telling you I have a serious problem!
I picked up and put the things down like 3 times but I couldn't resist!
I kept telling myself you do NOT need another pair of pliers
you must have 6 pair almost identical to this one
hey at least i resisted the Dunlap level because it was 2" too long
if it was a Stanley sweetheart it'd be here with me now!
I bought 2 air chucks too because the last ones i bought are a PIA to plug into
Valen: i will install ubuntu in virtualbox, test out more program, and see what else i can find out with the sim
see if i can touch RTAI on my laptop, just to get a feel for that, checkout emc and look at how well the code is documented, all while checking how much ladder logic there is i can reuse, looking at the rest of the docs/wiki
man this motor driver i built sounds like an alien plotting to destroy the world!
forgot about a little detail, i got like ~4GB left on this drive, installing ubuntu would be a nice squeeze
nah its pretty small
~1gb would be enough
let me revise that, 1GB free
see its still all good ;->
he installed inventor 2011 on it today
Valen: to run sim i could just boot the livecd inside virtualbox and work on files from USB disk
yeah, its a pain in the ass to work like that though
you could just run it off an external hdd
just as much as sitting on a windows machine that runs out of space
Valen: i will most likely do that, i think i even saw some sit around, if they have no purpose, i will have a purpose for them :)
sounds like a plan
silly 37GB drives in these workstations....
unless they are solid state disks of 15Krpm SCSI
of = or
just some WD sata drive
dude, upgrade time lol
and based on noise, not a 10k either
80gb drives are like $40 or something
our EMC has a 200gb drive cos that was the smallest the supplier had in stock
i am the one who gets the designer's or cad guy's computer if they get a newer one :)
Valen are you buying?
22:21 < Valen> 80gb drives are like $40 or something
I was digging through a box looking for papers and I found an HDD in it I didn't know i had
now I wonder why I'd put it into that box?
i'd buy a nice disk on my own coin for this, but wife's dog went to vet today, $1k out the door
pfred1: hook it up and find out
morficmobile the thought has crossed my mind
not curious enough yet though?
I did look it up on the net and found out it's only 2.5GB so its not the HDD I thought it might have been
I lost a 120 GB drive a few years ago
put it someplace where it'd be safe and its still hiding there!
don't you hate when you do that?
we always have stuff in safe places we then never find again
I think its a universal thing to do this is special so I'll put it someplace special
someplace i rarely go or disturb ...
pfred1: I'm an IT person, I keep track of that kind of stuff
when I was younger i had an almost eidetic memory but its just not what it used to be now I have to say
I used to freak my grandfather out when i could remember where everything was
though i could remember where somethng was I'd seen 4 years ago and can still manage to misplace my keys
and that sort of freaks me out when I think about it
soon it's all quiet in here
morific did you contact Yas or Siemans?
calcite: my wife's almost dieing dog ruined my morning free time to do that, we will do it though, i brought up what Dave911 said, in our meeting about Camsoft vs EMC, about contacting them direct for best price on the indexing spindle drive
Sounds right, regarding the dog, My daughter (away at university) left her dog with us. I like the brute. Anyway, the dog starts looking whimpy, then limpy, then looks like the end. I start wondering about that phone call. ;-)
your call to her?
a trip to the vet, describe the symptoms, the vet says " it's Lyme disease, here is the prescription" It worked! Two days later, the dog is off the death bed, happy as a clam at high tide!. This was a year ago
The dog is out in Montana with her now! Chasing off suiters I hope!
lol good luck
our had internal bleeding
's no good
that ;-) was meant to be :-(
probably the bigger ones roughed her up
our small one keeps getting half eaten
No fighting back when it's soft parts
speaking of which I should take them for a walk
calcite: oh, i just thought you are one of those "Then i got my gun and put em down" Texans when i saw the ;-)
You know there is a "theory" that the pups should stay with the bitch for AT LEAST 9 MONTHS! to learn the ways of dealing with others, dog and man.
9 months might be a bit long
cats get really messed up if they are taken too young
Nah not if you want them to learn all the lessons mom has to offer
I think it also depends on where they are going
if they are going into another "pack" thats probably ok
if they are going to a solitary place, then well I think thats a bad idea anyway
Going to Grandma's lap to bit the face of 4 year olds is the one I worry about
SWPadnos: California =)
Hey I have a couple of OLD PCs Too old like DX's or something, Is it practical to fit in a modern MO Board? Or just can these and buy something off the net? Only application is EMC machine control
I lit one up the other day....16 MB of on board ram, I almost choked!
nah they all changed when they went from AT to ATX
pentium > pentium 2 era
or the like
the "dx" series were 486's IE 99% they will be AT and not compatible with ATX stuff
I'm thinking....The PS might work, but might not connect, Ahh the HD the CD, the serial ports..... so much compatability,
the power connector is different
AT used a single row header
See, glad I asked, at least the wall plug must still fit;-)
ATX is a dual row 20 pin header and atx 1.3 which is most newer stuff (other than really small things) are 24 pin
also theres the aux 12V connector on most new stuff as well
I'd say sell em on ebay as antiques if they are running
use the money to buy an atom board ;->
Any advice on the "best choice" off the "-bay" for less than $100?
you can buy new stuff for that price range
Really,, just th MB surely
mbo + cpu + ram I'd imagine, if you can dumpsterdive an ATX case and a HDD your set
I'll need to look at the component level. I did pick up a Lenovo "Desk-something or other" couple of years ago. Latencey sucks
might work with a Mesa card
Anyone familiar with ORMEC Servo drives? Firewire interface
if its a desktop odds are it'll have all the bits you need to run an atom mbo
Ahh thanks Valen, I had not thought to change mbo on the Lenove/IBM, the unit is so "homogenized". Very modular SFF
Well, An Atom from Tiger Direct is not in the running http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5208988&CatId=4551
dont quote me on it sight unseen but generally the PSU and hdd are ok
yeah I want one of those for my TV computer ;->
No binding contracts ;-)
D945GCLF2 is the one you want
That board has a lot of stuff on it
yeah its a high end doohickey
with no pci slots lol
Where will I put the NI 488 boards?
theres yer prablem ;->
So I can't "upgrade" all this GP-IB electro- motivational equipment ???? ;-)
pen plotters, spectophotometers, EG&G end point detecors? Ohh! bother!
Valen, i googled "Atom D945GCLF2" and the returns were linux bugs! Now how is that? (I have not read any of the links yet)
Hello all, I'm thinking of modifying my mill to a CNC using steppers but want manual control still so I will attach a wheel to the back shaft. Do hybrid steppers when not energized pulse like the ones you find in a printer or will they run smooth?
I figure it's just the permanent manget ones but I'm thought I would ask.
Are there steppers that do not have magnets, at least residual? I thought they all cogged when not powered
I'm not sure. I have only ever used servo's for most things. N.m. they are permanent magnets too. damn... I could see cogged pulse getting annoying in manual..
put a magnetic clutch in between, if not in auto, it's your handle only?
morf Belt drive?
a hand wheel between a motor and shaft would be cumbersome
Yeah that would do it... Or I can just not worry about controlling it by hand and always use the computer.
Not too sure If I really want to tackle it with this mill, might look for something getting the backlash out of isn't going to be a PITA
the cogging can be a nice feel... a sort of digital effect. Though I have to admit, My experience is turning damping "wheels" rather than proper machine tool hand wheels.
Is there anyone out there that would be interested in a Embedded 800Mhz CPU boad, Mesa 4i65 FPGA, Opto-22 Rack, Mesa 7i33 Analog Card and Power Supply? Figure here is a good spot someone might actually use it..
further specs on the cpu board?
or to be blunt, does it have LVDS video output?
it does have a LCD panel connector.. but I'm not sure of the signalling.. I'll grab it just a sec
i have sort of already commited towards mini-itx though, but pc104 is what i orgiginally wanted
but i was deterred by the $2k price tag on cpu boards with decent performance
Found it.. http://www.corvalent.com/02b_ind_boards/mb_440bx_ebx.shtml
oh, ebx, too large then :/
yeah.. its smaller than mini itx but not by much.
only in one dimension though
very neat setup for emc2 either way, i hope i finds a good home
My main plan is to sell it so I can buy a 5i22 for my mini itx system...
[04:52:39] <DaViruz> http://daviruz.meeep.net/gallery2/v/eye-fi-dump/IMG_1786.JPG.html
still need to get a 5i23 though. 5i22 would be nice but i suspect it won't fit in the case
Thats a nice setup. http://www.powerautomation.net/mainpage/images/stories/CNC/PC013189.jpg
hmm, what's the lower left board? some kind of relay board?
on the bottom? it's just relays on din rail
err. bottom right
DaViruz: eye-fi working well?
morficmobile: yeah, really well
It's an opto relay rack for all the io.. You plug the input or output module you and into it an viola..
Works great with the MESA cards...
oh, that's the opto22 board you mentioned before?
yeah. I have two a 16io and the 24 on in the picture.. I would sell the 16 one..
since eye-fi works with my E30 iirc, i am always wondering if i should or not
i use it in a canon eos 20d, which actually uses compact flash
not exactly supported but works great
i can't imagine going back to cables, file transfer programs etc for publishing a single photo
micges_work: good morning
Heh, you just gotta love linux... Pulled a dual bot ubuntu xp hdd from a T61, shoved it in my netbook and booted ubuntu. It even automatically connected to the wifi network.
I LUST this netbook!!!
Lenovo IdeaPad S10
Now, as soon as they fix the BIOS, I'll be set! lol
CAN I LUST IT TOO?
oops, silly all caps for setup sheets
morfic: Sure, for $600 USD + shipping.
Jymmm: as much as i hate the monster ubuntu kernels, they sure are nice when you move them across different hardware
No, M$ has monster installs.
oh no, i'm not going there, i'm just a "i compile my own kernel zealot" :P
di.fm kept me going tonight, forgot mp3 player at home
compiling a kernel for anything other than a server farm is a waste of time.
works for a really small device too
they have those already
not going to stay on a old kernel if i see a lot of usb and xfs fixes in a newer version for example, when it has usb disks attached and got some flakeyness with em, just as an example
Lie on the bleeding edge and you WILL get cut =)
i tend not to try to bleed too long
oh wow, grammar fail
i tend to try not to bleed too long
* morficmobile blames it at 2am not having the usual nap before night shift
and i blame it "on", not "at" 2am :/
Jymmm: here is your chance, can win any argument now
Jymmm: what's bleeding edge? git? -rc? .33 before .33.x? :)
you sure are conservative then
Well, what else do you run on a Kaypro computer?
with a 7" amber monochrome crt
i need to shut down here and go home
enjoy your good for the eyes amber screen
i'am trying to get FreeMill to work with ubuntu karmic64
the programm runs under wine near perfect
but it does not save me the output
sealive: never tried freemill, sure you have write permissions for where you try to save?
reminds me i have yet to install wine on here :)
works perfect no i logt it then i saw what wars rong Windows SPACE foult
this is the perfect Gcode-Fenerator for me
and now on my Carmic 64 system running
MarkusBec_away is now known as MarkusBec
I've a question. I'm working in an electronic company as R&D. I'm trying to design a CNC glue machine and I'd like
to start with something usable
my question is:
do I need linear absolute encoder or I can use only brushless+ step controller motor?
there are other choices between those
like stepper motor?
such as a servo (brushed or brushless) with encoder, driven with analog velocity control
you don't need to use a step based motor drive
in fact it's a bit harder to use step drivers when you have feedback
I'm looking for brushless motor with quadrature encoder and step/dir controller
why a step/dir controller?
what kind of interface cas use with emc2 tu use different type of controller?
[12:19:32] <SWPadnos> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?EMC2_Supported_Hardware
step/dir, PWM, or analog
and what kind of controller you can suggest to me?
I'm not sure what you mean. EMC2 is the controller
are you asking about motor drives?
ok, what I mean is that I'm choosing HW interfaces
well, my personal favorites are the Mesa FPGA cards, since they're reconfigurable
they need a pci or isa bus?
there is one model that connects to a parallel port as well
but PCI is better
I made this when I was young)
first version was in plexyglass :)
I bet you learned a lot from that one :)
bus was only a toy
now I need somethig more robust
I've no experience with motors other than stepper
and I've used only parallel port
once you add real feedback, steppers are no longer easier to work with
yes I gess
and there probably isn't enough I/O on a parallel port for 3 steppers plus encoders, plus the other I/O you need
yes, I didn't use encoders, only 2bit each motor
now I've to find the right motor. The working surface should be about 2000x2000
you need to find the right screws first :)
oh, yes :)
well, thank you very much for your help,
probably I'll ask you more the next days
have a nice week
thanks. you too
* frallzor feels good today
Just this once .. here's the log: http://www.linuxcnc.org/irc/irc.freenode.net:6667/emc/2010-04-15.txt
milling beethoven http://www.sammellothar.de/beet_m.png
sealive: free mill working for you?
* skunkworks only played with it once.
yes on karmic 64
you neet to put the stl into the wine folder wher it is
and make shure that there is no space in the folder name during installation
you neet to put the stl into the wine folder wher Freemill Exampes are
hello, I finished th CAD modell for the CNC. http://www.dropbox.com/gallery/2498257/1/CNC%20CAD%20Bilder?h=602906
. What would you change? (I wont change the linear slides because I aready have them). Is there a huge difference between the light and the heavy alu profiles?
the Z axis is unsupported?
unsoppoted? what do you mean? I haven't finish the drill mount yet.
looks like the bottom is not attached to anything
flexxxv, application of machine wood/plastic/foam?
that's a lot of aluminum
flexxxv: this is mine http://www.sammellothar.de/X_rahmen.mpg
Yes wood and plastic, but I would also love towork with alu
do you really need all that Z-movement? that will flex for sure
the long Z may cause problems
and are you going to work mostly in soft materials?
Probatly yes, no steel or such kind of things. but alu would be nice. Do you have some good Ideas how to make the alu construction cheaper?
all those brackets get pretty pricey
flexxxv: see my construct
flexxxv, your nick suits that design
its simply cutting your profile
flexxxv: what dimansion do you go for
I see no shear force restriction
why is the shape a cube
:P I hate to change the design again :P dimension is about 50cm*50cm*40cm (the construction and it will be able to drive aubout 40x30x20
and is that center doodad the spindle?
this center thing is the spindle, Bad position?
it's too long anyway
flexible therefore chatter and tool breakage
well, a spindle design like that is very low in rigidity
and seems to have no support on the bottom so it will flex along the Y axis at least
most machines that have spindles or rams like that will have a second Z axis that adjusts the rest of the frame
or only work on foam
sealive: how did you make the Mt. Rushmore g-code? image-to-gcode script? CAM Program?
critiquing someone elses design is a whole lot easier than actually doing the design!
I just scrolled up... sketchup then blender then freemill
[14:35:19] <toastydeath> http://www.machinetools4sale.com/images/prodimgs/Summit/vbm_l.jpg
the main Z axis is attached to a secondary W axis
so there is as little flex as possible
[14:36:12] <toastydeath> http://www.ms-tech.com/image/Pond%20Bridge%20Mill_s.jpg
same with this machine
flexxxv: i got 28cmcube with 165mm axis xY and 55mm Z
costs 250Euro includ all Electronic
Nice, what can you cut with it?
bras but its for PCB
something like this is good http://www.gimbal.com.au/image.axd?picture=200906291141_2.jpg
won't fit in my garage
on machine designs like awallin just linked, the maximum rigidity happens at the lowest Z height
whereas bridge mills, etc, tend to have the highest rigidity at the top of Z travel
awallin: but not at 250Euro
Ok how about: I will tell you what components I have and youz tell me how you would make a good constuction with alu profiles. :D
how about a lower horizontal bearing supporting the Z along the X axis
I have 2 of these (not exactly but looking similar) http://www.igus.de/_wpck/images/global/1_2/drylin_sht_1.jpg
one is about 550mm the other about 345. I also have 4 times this: http://www.nb-sh.cn/nbchanpin/UploadFiles_3012/200704/20070412125043570.jpg
(430 mm). And I have two threaded spindles and 4 of these: http://www.igus.de/wpck/default.aspx?Pagename=xiros_stehlager&CL=DE-de.
I got all the material quiet cheap
each of the linear slides from NB have 2 sliedes
flexxxv: i got everything from Meadler
JT-Work_ is now known as JT-Work
sealive: Yeah I know this shop. But I got a lot of these thing very very cheap.
so use it
do thex do 25cm
flexxxv: for your frame. any way to add a diagonal beam for torsional rigidity? (cross bar)
i already thought about this.
JT-Work_ is now known as JT-Work
So I changed the design a little bit: http://www.dropbox.com/gallery/2498257/1/CNC%20CAD%20Bilder?h=602906
you are speedy.
@atemega: Yeah critique is so much easier :D
@ atmega just a little change :D
Is the spindle position now better?
flexx bist du deutscher
RLP Ramstein hier
*I hate Rammstein* ;)
nicht die band die stadt
perhaps he hates both.
Ramstein military base is serving for us all in the world
yeah, that's it!
@sealive do you know a cheap supplier for alu profiles?
you can usually source the alu pretty cheap, it's all the brackets and stuff that bring the price up.
i got one here in town
the 6m of 40Square here i both for 20Euro
do you have a name?
I'm looking for 45x90 :D
oh wait, I'm a man, not a number.
atmega: what is going on?
I'm tired of writing code
* JT-Work wanders off to go fishing
now that is an exceptional idea
I think I have to change the design of the aluu frame. I think it is getting too expensiv :-/
how much difference does it make if i use the light profiles instead the heavy ones?
depends on the shpae? a closed structure should be pretty rigid with either?
hmm closed stucutre... Is mine a closed structure?
Srpski is now known as Dannyboy
@sealive which companys can cut alu profiles? what do I have to look for in the yellow pages?
i finaly got mountRushmore at the EMC code 100x50 inch ->http://www.sammellothar.de/mount_m.png
nice :D, I also want a CNC :D
Is your webpage not working in firefox?
shoudt work there is nothing on it
ok i thought there is missing a lot :D
there is only a driver L297/298 animation
yeah I see it. I was also thin about using L297 L298, but now I use a3982 chip.
G540 from the states 150dollars
4Axis only put 40V on it
hi, I have a problem with emc2 - if it goes fast it does not go the full distance, like it's loosing step signals. But it goes back to the proper zero position. What do I do wrong?
yes, how about min/max sensors?
for power over 4A per Phase use G320
I can only power 2A
where do you get a G540 for 150dollars?
i use Switches and software ends
there is compled kit for 2A
with 40V 285Dollar
too expensiv :P, I already have the Pcbs but I'm still waiting for some electronic components. I soldered already one axis controller together and it is working :D
as i started
then i went to mechapro
and then to geckodrive
I built this: http://reprap.org/wiki/Stepper_Motor_Driver_2.3
its nice small and working proper
flexxxv: that will only work for 10min milling
i need at least 5Hours
the mountain will mill for 10or more
I thought the smd components would be harder, but it was ok. I had no problem with the first Pcb :D (first time SMD), why only 10 min?
sealive: I don't know how you put the sketchup file into blender.
its on the limit
*already have it running for more time*
import via collada elmo40
how did you use Collada?
i use V0.3.162 colada 1.4.0
I cant see why it shouldn't run for more time. Also the reprap guys use it more time! :P
in the modell file ther is the dae
openCollada? or Collada?
for the mount rushmore you will get 10emptys and about 15 meshes
blender import collada
then join them togeter from large to small
if you got 1 mesh
kill all the emptys
you imported multiple files?
I don't see 1.4.0
no only the dae
witch blender you got
this is the page I am at: http://www.opencollada.org/download.html
elmo40 yes, 3phase at a residential place =)
its in the scripts includet you must not download anything
frallzor: damn. sweet!
common wiring here, 3phase > house >1phase to the rooms
* frallzor is eating strawberries
now, will it increase your bill? I hear 3-phase systems cost more / month
I earn them
frallzor: 3phase to the dish washer
elmo40 no idea
pretty much all houses in sweden has 3 phase power
even most apartments have it
must be nice!
i have never known anything else so it's hard to tell :)
skunkworks: There ya go... Save yourself $75,000 USD, move to Sweden! Ya ya
Jymmm: as a doctor you can get eaven more
In germany it is also normal. But when I was in Bolivia... you don't want to know about the electicity there :P
blender screenshot how to do
so i got to go BB
JT-Work_ is now known as JT-Work
elmo40: does the sketchup work
I need to laminate some plywood, what's a good way to clamp 2ft x 4ft sheets?
Jymmm, many tons of pressure
archivist_attic: Ok, 5gal buckets of water it is!
get some 2ft x 4ft 1/2" steel plate, sandwich the boards, park a forklift on it.
park a few more forklifts on top of the first forklift
then jump up&down on the top forklift.
then, pick a different material.
anyone know the software Aspire?
Jymmm: go to the next stonestore and get some blocks for less broken ones that will do the job
a quick google and I saw 9000KN pressure
that's a lot of 5gallon buckets of water
I just found another and the smallest press was 500 tons
one would run out of forklifts
oh fork the stack of forkers fell over
Jymmm: Vacuum bagging .... easy, cheap and effective at 14.7 lbs per square inch....
2100 lbs per square ft....
640 Tonnes 8' X 4'- Plywood Press
That would work also... but the one I have is broken ... so gotta go cheap .... ;-)
Dave911: just need to find a really big bag =)
Make one out of plastic sheets and tape it together ??
looks like they use up to 20 tons per sq ft
[17:47:53] <Dave911> http://www.youtube.com/watch?v=LPXn038ahD4
Vacuum bagging is often done for composite construction... air pressure is free! :-)
There are lots of other similar vids on Youtube...
Yeah, I've seen vacuum bagging before.
pcw_home: Hi Peter ..
gotta question... 7i43 vs 5i20... how much impact is there on cpu time between the two...
10x or so
Is there a noticable difference between the two on lower power CPUs like Atom 330's etc..
I think the total I/O servicing time on the PCI cards is around 5-10 us, and it's 50 or more on the 7i43
incidentally, the Atom 330 is EOL
the D945GCLF2 motherboard has been discontinued since February
end of life
end of life
So that is the servicing time every servo cycle?
I would think the 7I43 overhead (maybe 100 uSec) would be OK with 1 mS servo threads
end of line
end of le-chip
SWPadnos: do you know what is replacing it?
I thought the 330 board was going until sometime next year.. did they change the plans???
5I20 better if you want 4 KHz or so threads
and as PCW said, it doesn't matter much for a 1ms servo cycle, but if you want to go faster it will matter
I know it will not do a 10khz servo thread on an atom.. ;)
(510 boards already replacing the D945GCLF2)
skunkworks, apparently the D410 and D510 are replacing the 270 and 330 faster than Intel had anticipated
unfortunately, they don't have identical other specs, so some of us are somewhat screwed by the change
10 Khz might be OK on the Atom
* skunkworks couldn't figure out why I kept getting a rtai timing error until I remembered I set the servo thread to 10khz for testing.
The D510 board looks just like a 330 board, I've got both here.. But the D510 board only has a LPT header, no DB25 plug
The 330 board is a nice setup...
I have had good luck with it.
but for the big machine I needed 2 pci slots.
I thought there were some USB headers missing too
Looks lije the 510 uses the same Winbond SuperIO so I know its EPP support is OK
So the 330 CPU is eol, not just the intel 330 boards?
I think that's the case, yes
Wow, that is too bad...
the processors themselves may still be available (that could be the next year thing you're thinking of), but the various motherboards have been discontinued
probably really painful for people making embedded Atom 330 based cards
Dave911, are there at least 2 USB2 headers on the D510 motherboard?
I can look.. I have one right here ...
SWPadnos: didn't you go with something else for your project?
the only reason I found out about the EOL was because I had to go to a local place to grab a few motherboards, and they sent a bulk mail to everyone who had bought the D945GCLF2
1 USB header
that's what I thought
and is what screws my application, as I need two
But there is a USB flash card header also??
I think that one only has electrical connections for one port or something
pcw_home: I think the servo thread at 10khz worked fine with the default 5i22 setup - but when I added classic ladder - it might have been to much
Is that the one with the MiniPCIE socket as well?
What CPU Skunkworks?
PCI express full mini card slot
are some american people here
contemplating making a cabled PCIE card for that (1mm PCB makes it a pain though)
SWPadnos: Yep the one USB header is single channel, that is the USB flash Card port
I didn't realize this board also had two com ports on it?
[18:03:15] <sealive> http://www.pictureupload.de/originals/pictures/150410200120_bush.png
does this look like G.W.Bush
oh, wait. is there a normal one plus the flash one, or just the flash one?
One normal plus one single channel
still one short for me :(
So three channels in total on the headers for USB
The D510 is a bit faster than the 330 but for many/most apps I doubt that the difference is noticable
Dave911: do you have a link?
The fanless heat sink is nice though..
[18:05:37] <SWPadnos> http://www.intel.com/products/desktop/motherboard/index.htm
No, I just have the board sitting right here ...
[18:05:46] <SWPadnos> http://www.intel.com/products/desktop/motherboards/D510MO/D510MO-overview.htm
Not having a com port and a LPT port plug on the back of the MB is a pain in the butt
I guess header are cheaper though..
7 usb ports are not enough?
what is the board for
8 USB ports on the Asus board .... the intel 330 board is out of stock at Newegg... but you probably knew that already..http://www.newegg.com/Product/Product.aspx?Item=N82E16813131396&cm_re=D945GCLF2-_-13-131-396-_-Product
Get em while their hot!
heh - that looks identical to the intel one
that is one tall looking heatsink :)
If you google "D945GCLF2" there are still companies selling them in bulk 10 packs for about $800 per pack.... but you know that won't last ....
and I don't want to continue to have a design based on obsolete components
Both newegg and tigerdirect are out ...
* skunkworks hugs his 2 un-opened boxes.
I wonder how long until the Asus board is gone also?
I've got 2 more here as well :)
Put them under your pillow ......
and what I need is actually two motherboard headers, which support USB2 on all 4 channels
so the 8-port ASUS is exactly enough, just like the D945GCLF2
If the 330 boards are selling so well you'd think they would keep making them ...
I guess a lot of people (probably folks making HTPC or home servers) are going for the D510 instead
2 x USB connectors support additional 4 USB ports
I have a Tech Data account for PC hardware and the Intel 330 boards are shown as being phased out .. not available.
SWPadnos.. if you want more of those you better grab them up now... while you can...
I think I can still get a few from Logic Supply
(strangely, they're local to me)
I'll have to bite the bullet and get something else at some point anyway, so I might as well start looking
local... huh, that never happens to me...
me either, that's why it's so strange
and they're apparently one of the larger embedded systems suppliers out there
It seems like they are pretty big .... although I don't think I have bought anything from them.. they have a nice website..
yep. I ran into them at a local technology trade show
turns out they have a warehouse just behind one of my main customers
Dave911: So does playboy, but not a site I'd look for a wife =)
Dave911: In other words.... Don't judge a company by it's website. Anyone can pay $500 for a nice looking website.
is there a good way to get analog inputs from a mesa 5i2* card?
do you mean analog into the mesa, or analog out of the mesa to something else?
analog into the mesa
i want to sample an analog signal
[18:43:12] <Dave911> http://www.intel.com/products/motherboard/index.htm?iid=subhdr+prod_boards
I don't think so currently
Intel has the 330 board listed as mature... not yet discontinued
Jymmm... true, I used their website to look at boards and then I bought them elsewhere .... although I think they probably paid a little more than $500 for that website .... ;-)
Mesa's THC board will take an analog input into a 5I20 board.... I think they have a 0-10v version... Or you could use a voltage to freq converter and run it into an encoder input..
anyone in here buy from Minarik before?
anybody here using a Smithy 622 ?
what is that? :)
is it an all-in-one?
[19:28:38] <mikegg> https://www.smithy.com/product_home.php?cid=11&scid=16&pid=1006
nah, Smithy does make those
I think this is imported and then Smithy adds controls / waycovers etc
I just ordered one without steppers on X and Y
I got some NEMA 34 BLDC i'm gonna install
the steppers it comes with have 35 in-lbs peak torque
mikegg: Uh.... 850 in-POUNDS for Z axis?!?!
the servos I got have 85 in-lbs :)
in-ounces I believe
Yes yes yes, read the spec sheet =)
Stepper Motors (X, Y, Z Axis) 566 in-oz (X, Y Axis); 850 in-lb (Z Axis)
in-lb <---- pounds
You have 220VAC ???
well yes and no
I will probably just use 120
It says it needs 220VAC
I am not using their controller or anything
you're using their spindle, right?
maybe the spindle does, but I think I will swap that out too
Wait, you're going to buy something BRAND NEW, then just start swapping out parts????
I have a 2 hp motor at home with a VFD i would like to use
it was a demo / prototype
I got it for a song...:)
so how much was this "demo" ?
the servo's were $275 alone
EbiDK is now known as EbiDK_Mobile
EbiDK_Mobile is now known as EbiDK
this is totally nuts
[19:51:02] <alex_joni> http://www.youtube.com/watch?v=jHWDSnWk2jU
(link from awallin)
Whats even MORE nuts, is someone bought it!
What code would you add to the post to take the Z axis to the machine home position for tool changes?
SWPadnos: what was that link that you gave of that helmet being cnc'ed?
you add TOOL_CHANGE_POSITION to the ini file
I don't remember, it was from a slashdot article
oh, that may be even better
rtfm because there are many options for tool change clearance motion
if you want to move Z all the way up IN GCODE you'd want like G0 G53 Z0
[20:13:38] <skunkworks> http://singularityhub.com/2010/04/05/5-axis-robot-carves-metal-like-butter-video
but like swp said, you don't need that
SWPadnos: found it. What you think that machine costs?
[20:14:30] <frallzor> http://pici.se/p/large/pavicpqOq/
[20:14:34] <Jymmm> http://www.youtube.com/watch?v=RnIvhlKT7SY
SWPadnos: $19.95? 19M?
the Hydrapath CAM software alone costs as much as a nice imported sedan, according to Andy Pugh (or archivist, don't remember for sure)
plus yearly contract, probably.
if I had to estimate, I'd say the machine is in the $200k range, maybe more if the work envelope was big
maybe the $400k range, thinking about it
SWPadnos: That little?
I don't really know
SWPadnos: I'd think at least $2M
I will see hyper expensive cam at show next week probably
I love how they don't even use coolant
any suggestions for starting points for feed/speeds for cutting plastics with a router?
30,000RPM and 120IPM
30K RPM is to have a clean finish, and the 120IPM is to not melt the material.
I can only do 60ish IPM
that seems way too fast
that's what the box says anyway, it's a RotoZip(tm)
not gonna happen.
what size cutter?
due to melting? or what?
I can buy whatever cutter
I have a 2.5HP spindle, just toss that glorified dremel out the window
I don't have to cut it in a single pass
Plastics are unique in that that the chips will melt make on to the cut surface.
I would try one of those single flute end mills
maybe 1/8" ?
more like 4 flute.
I have a 1/8" 2-flute
You'll REALLY need to clear those chips BIG TIME.
and a .2" something
how about acrylic/lexan/plexi/wtf?
i dunno, i would try the 2 flute as fast as your machine can scoot. If it starts to melt, back down the speed on the router
andypugh: how is the hobbing going?
Now it works, I am doing other things. Currently fiddling with an Arduino.
Though my new ball-nut for the Z-slide upgrade appeard today.
I think I have a 'theory' of operation for the accupins.
My Arduino project is an attempt at a Resolver interface, there might be some crossover.
The accupin drive is two complementary square waves isn't it?
Then measure the return amplitude, and do maths? Sounds trivial for an Arduino (or similar)
they run a square wave into the outside legs of the 2 center tapped coils... They take the 2 center taps and sum them (through a resister bridge) - this gets turned into a square wave. That square wave is in relation to the exciter square wave depending on the postion within the .1 diam pin.
Yea! my new way covers are in
So - I think they figured out the absolute postion of 1 pin by counting (using a 250khz clock) the distance between the rising edge of the exciter and the rising edge of the returned wave. That would give 250khz/250hz = 1000 divisions or .0001 resolution.
That sounds rather unlikely. You mean time-of-flight?
Incidentally, my Arduino code can solve arctans in 4uS, so the speed is close.
well - that is just a theory.. (I am pretty sure about the 2 square waves (reference vs returned) what they did with that is just a guess. Seemed plausable concidering the main clock was exactly 1000 times the accupin supply
I would have thought that two relative amplitudes was more likely.
But what you describe is easy enough to test out with a bit of analog input and maths
Though 250kHz would be a struggle I think.
I don't think so. They excited the 2 coils and then summed the 2 center taps that then got turned into a square wave that was postion within the one pin (the square wave postion)
Yes - I plan on running some signals down it and see what it looks like.
Aye, Oscilloscope seems like a good starting point.
They actually say - 'the phase is proportional to postion of 1 pin'
actually getting something to work is another matter... ;)
I would want to make a accupin -> quadature converter with index. ;)
I think that once you have the analog side sorted out, the rest is just software.
EMC2 PWM + Power Op-Amp sounds like a plausible signal source.
Are the exciting waves in antiphase?
not exactly sure... yet
I think the circuit did some funky phase shifting for calibrating...
I want to measure one voltage relative to another. I wonder if I can just connect one voltage to the AREF pin of an A-D converter and read the ratio directly?
maybe, if they're both <5v.
I'd check the atmega datasheet to see what the acceptable deviation from vcc/gnd is.
andypugh: no you can not
well, you can, but you won't get relative voltage
you'll just get the ratio
I want voltage ratio.
Excitation in to primary, result out of secondary :-)
not sure about the frequency response of the Vref though
it might well be totaly useless for anything other than DC
1V minimum in the spec sheet anyway.
I wonder what happens if I go lower?
(Magic smoke escapes?)
no, just unreliable data.
if you need to read lower voltages, scale it up with an opamp first.
I am wondering if there is a standard "compute the ratio of two voltages" analogue computing circuit
andypugh, it may not work as you want. AVRef needs to be stable
I assume that it samples MSB to LSB though, so as long as the rate of change is slow relative to the sample clock....
how is 1000 devisions .0001 resolution?
1/1000 is .001, just wondering where the extra 0 comes from
10 tpi screw?
1000 divisions on 0.1" pin spacing
gives resolution of 0.0001"
MarkusBec is now known as MarkusBec_away
Just this once .. here's the log: http://www.linuxcnc.org/irc/irc.freenode.net:6667/emc/2010-04-15.txt
toastydeath: LawrenceG: thanks, i didn't see pitch mentioned around that comment, so it seemed pretty arbitrary to have 1000 divisions and .0001 resolution, the talk was about frequency when that came up
accupin, that's where it all started