gee it's just a girl....heh
there's like 2.5 billion of them you know
i love this life :P
haha that's good
I was thinking...yeah 2.5 billion girls...but 2.2 billion of them are fat.
well, I am going to the music room!
* Jymmm humps A-L-P-H-A
ty, my very first part
8 minutes to machine, 3 hours to design/fight the software
3/4" thick MDF, 2"x2"
each step is 1/16" wide/tall
Long time no chat :-) how goes ?
Life slowly getting back to normal again...
Built up a stepper motor controller using an AVR last night and started looking at EMC again.
Still trying to find something on this standard controller.
No luck so far :-(.
Ok, I give up, is there a list of controllers that EMC will use or plans on how to build one ?
35V limit, INCLUDING BEMF
Jymmm: Thanks, google is less than useful.
No plans, so I guess one has to but the interface :-(.
K`zan sorry. :) hi. again
No problem A-L-P-H-A :-), been trying to find some plans for a controller than I can build, $175 is a bit expensive when one has all the tools and most of hte parts :).
Wonder what people use the 4th axis for,
say you want to engrave something on a cylinder
K`zan google helped me find everything =) Mind you I did a lot of reading too
Jymmm: Takes work these days with google, it has become more of a catalog than an information resource anymore :-(.
Just roasted up about a pound of coffee, the place smells WONDERFUL :).
A-L-P-H-A: I guess I have a LOT of reading to do if I am going to tackle my own controller. Serial would be nice, but not if parallel port speeds are needed.
LOTs of reading to do. Bit more involved than just drawing up a piece, spitting it out on the paper tape punch and running that into a moog :).
Yes, it has been a while :).
live CD finished downloading, so I can burn that and play with it on this box.
mv -v /home/vw/zdl/xBUI-Live_rc46.iso /home/tmp/isoarch
Coolness, turbocnc works under dosemu!
K`zan : Just wait till you actually try to operate your steppers.... expect issues.
K`zan expect lost steps if you run under anything but REAL MODE.
03paul_c * 10emc2-auto/wiki/ (11 files in 10 dirs): "Auto update wiki from a cron job. Fri Oct 7 10:36:01 BST 2005 "
an0n is now known as anonimasu
up at 0430 for another day!
I woke up at 09:00
some office work....some metal machining
but I ended up working until 01:20
I am just writing software
I have to do some on one job
a bit later
it's quite fun though
and of course I have to convert the cnc for the new spindle
may have to do a bit of rewiring
I still have my machine in molecules
going to replace all bearings and a new spindle motor
5kw I think..
and gear it for 10k/rpm
should handle alu much better then today
yeah this is 4 kW from 18-24000 rpm
also should do alu well
I dont know about KW/speed..
runs at lower rpm, but not at the full power
or well, nm / speed..
it depends on the control programming
going to gear 1:3.5
and get a vfd with brake so I can overdrive it for a bit more momentum at high speeds..
for this below 18,000 I will go for constsnt torque
that's most important
torque ~ kills parts
this thing has class 7 angular contact bearings
I have no idea what bearings I'll buy..
instructions say thet it is very important to warm it up 10 min at 9000 rpm before cutting
skf replacements.. :)
they'll cost a arm
class 7s do
several hundred $ a pair
but accurate to .0025 mm
however housings and shafts have to be that accuracy too
or the bearings are wasted
I am a little worried about running the 4 kW line in the flex conduit near all the encoder and signal lines
These look real interesting http://oeiwcs.omron.com/webapp/commerce/command/ProductDisplay?prrfnbr=387&prmenbr=316
limit switches or touch probe
about $32 USD for D5B-1513
Jacky^ my first part --> http://photos.yahoo.com/jymmm
what the material ? wood ?
TY. 8 minutes to machine, 3 hours to design. 3/4" thick MDF, 2" x 2", each 'step' is 1/16" tall and wide
it look nice :)
great thick too ..
my cnc cant worp up 2 cm
Ah. My Z axis has a 5.5" travel on it.
well 5" iirc
did you buy a driver board yet?
not yet ..
i'm planning all before
ive not credit card
so i need to get some information on gecko about alternative payment
waiting my cousin too .. he maybe want to buy 3 g340 too ..
i get my cnc toy running ok now with emc2
so, i can wait some week
ill build a cnc 1,1 mt
for me is simple ..
for my cousin not yet
it want to build 2 machine, first plasma machine
second cnc to work on metal ..
i concluded to buy all material new
excluding the servomotors.. i will try on ebay ..
motors are cheap, it's leadscrew and rails that are $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
and askins some quote from some italian productor ..
Jymmm: I know, les sayd the rails and bearing are up the 50% of total cost machine ..
it is true ..
I think more than that
but i want my machine running all day without break..
rayh-away is now known as rayh
got a clue what "/usr/include/glib-2.0/glib/gmessages.h:109: warning: `visibility' attribute directive ignored" means while compiling emc2?
rayh: it's just a warning, I'd ignore i
Jymmm: Per you comment from last night, I wouldn't be running the cnc stuff under a standard flavor of linux, would be a real time variant.
Booted the live CD last night before I fell over, not sure what is going on with it (bad burn?) but LOTs of errors will try re-burning it again later today.
Anyone have any comments on the controllers from:
[21:52:32] <K`zan> http://www.hobbycnc.com/
LOT less expensive than the ones from http://xylotex.com/
I think I am getting less confused about all this :), how is that for optomism ?
the hobbycnc boards are definitely affordable but they are unfortunately unipolar drivers
xylotex are bipolar but only 35V
actually the xylotex is cheaper than I thought - only $145
ups just came with my colombo spindle. looks good!
have some wiring to do though.
yeah, when I was considering buying a minimill to retrofit, xylotex was one of the things I was looking at
but I'd probably use the same L297/8 boards as chris did
they're good, but lots of work to assemble, and only half-step
I don't mind the assembly .. much ..
although not microstepping is good with emc if you have fine leadscrews
I trust my boards more - it's easy to blow up these others I think.
while I was looking around, I got the impression that the xylotex is very sensitive to over-voltage, and that his board design heatsinks the driver chip inappropriately
Building something up isn't the problem, it is figuring out what I need that is driving me nuts :)
jepler: yeah that
I wonder what that 4th axis is for, I can account easily for 3, but 4? SPindle speed?
It also appears that serial is out, this IS parallel country.
K`zan: emc directly outputs step and dir on the parallel port.
I have to try and set up an analog out from the dac for spindle speed (to the vfd)
wonder if that works
les: let us know if it does
cradek: I had planned to build one up using an AVR and talking to it serial, but unless I want to write *everything* this is out, gotta be parallel.
K`zan: if you are thinking of serial you may be underestimating the communication speed and latency issues
K`zan: simple chips like the L297 are cheap and available. Trying to reinvent them would be silly.
speaking abut parallel .. im tryng to get a 4A/ph stepper running with 2 A driver (l297-8)
K`zan: as a bonus, emc works perfectly with them
8 wire step motor
tried parallel, series .. wont run
it run only if 2 ciol are used
what if i use 2 driver, 2 A each ?
i aready have a driver unused here..
Jacky^: L298 docs mention how to parallel the outputs for more current
jepler: im using an electronic kit
doubleside pcb .. it is done for 2 A ..
maybe this advice won't work for you then
ive one more driver unused
"Figure 7: For higher currents, outputs can be paralleled. Take care to parallel channel 1 with channel 4 and channel 2 with channel 3"
i wonder what happen if i use 2 driver for a single axis
jepler: yeah.. i read the datasheet
if you try to parallel drivers from different chips, I think you'll run into trouble since their on- and off-times won't be in synch
cradek: In my ignorance, I am sure I am overestimating serial capability :).
the drivers are identical
My machining experience goes to manually running a bridgeport clone and CNC on a Moog.
and i know the configutazione wire of my motors
Long time ago...
it has 8 wired 4 coil
Jacky^: well, i'm considering L297/8 setups, where the L297 turns the drivers off and on..
cradek: Interesting site!
K`zan: thank you
jepler: yeah ..
i think should work ..
jacky help me with some italian?
Ok, dumbass question to help curb current high levels of ignorance:
of course the input be parallel
K`zan: we won't laugh
Better off buying or building? First project will be a router for PCBs, later I want to get a mini-mill like the Teig(sp?).
Tired of slopping chemicals :-) :-)
"squilibri residui .0150g "
K`zan: routing PCBs requires a lot of precision - 10 mil traces and separations are commonplace
K`zan: that means if you have .005" of backlash, most of your trace is gone.
les: umhh .. they looks like techinal terms .. let me check
THis looks close to ideal: http://www.hobbycnc.com/plans/plans.htm
I think it's balance
K`zan: no, I don't think it does
cradek: I know, but I am hoping to be able to get past those issues short of spending the combined wealth of the western world :)
K`zan: I have trouble believing that a plywood mill is adequate for PCB work
cradek: physical layout on the t hing anyway, sizes are more than good enoug.
cradek: I live in the US and know marketing would never lie to me ;-).
les: equilibrio is balance ..
Which is why I am here :).
K`zan: I would sure like to see a closeup of that board they show
in that case out ..
If I could afford a bridgeport clone with CNC, things would be a lot simpler :)
K`zan: my boards look perfect and beautiful under my 20x microscope
cradek: I'm confused, are you using that router from the link I posted?
K`zan: the picture of the milled PCB on that page
says .015g 67 degrees, .012 132 degrees, .016 196 degrees
K`zan: no, sorry, my machine is completely different
K`zan: see my web site
K`zan: cradek's machine is a maxnc10 with everything replaced
more has been replaced since those photos!
cradek: Are you talking about the MaxNC 10 ?
jacky, what about "collegamento"?
* K`zan is REALLY confused :-/.
K`zan: I cut PCBs on that machine
cradek: do you have any photos of your boards on there? Here's a photo of one of the boards I made on it: http://axis.unpy.net/index.cgi-files/etchcnc/etch-board-full.jpg
cradek: Yes, that would simplify things a lot. Perhaps I should just shelve this until I can either save enough or find a mill I can afford.
jepler: no, I need to get some photos of boards up.
jepler: that's a nice photo
cradek: You actually have a M100 series Palm that still works ? Wow.
jepler: those are very fat traces
jepler: (compared to what we usually do)
les, so squilibrio would be aout of balance
K`zan: yeah, it still works; I don't use it much
cradek: yeah. well, the board design was so simple (nothing going between pads or anything)
Backup battery in mine died and I finally heaved it in the trash just before Plam admitted to it and started doing something about it :-(.
jepler: I should take photos of one of the SMD boards
I don't think I have photos of any of the more complex boards
les: np :)
.015 gram out of balance on a 15 kg motor sems pretty good
came about an hour ago...looks nice
here's a screenshot of eagle showing a smd board cradek's mill made with no problem: http://emergent.unpy.net/index.cgi-files/projects/01112140655/soic-adapter.png
I bet the traces were 12-14mil
I am really looking forward to the low noise level of 74 dba at one meter at 24,000 rpm
sounds ok :)
Sigh, I think it is time to forget this and just start stashing coins until I can come up with a mill and then get back to it then. Thanks for the help all.
one last photo: http://emergent.unpy.net/index.cgi-files/01109127822/img_9012-small.jpg
K`zan: sorry to disappoint
cradek: NP, life is not infrequently like that.
I have milled some 10mil line/ space surface mount boards...but chemicals are quicker.
jepler: ugh, wish you had a before-soldering photo on that one
cradek: yeah, I do too
les: maybe, if you don't have to drill, but I hate dealing with chemicals
and I can walk away and leave the mill to work for an hour, but the etchant won't slosh and rinse itself
cradek: I still have that last board (inverter) that I've never assembled, maybe it's photogenic or would be with a little sanding
a laser printer would be nice ..
if was possible to directly print on
les: also, I ruin one shirt for every board I etch with that brown stuff
seem inpossible to do ..
Jacky^: I agree a laser printer that prints directly on boards would be VERY nice
the whole concept of a laser printer doesn't work on a conductive substrate.
i dont tihink it can .. on metal
just refill an ink-jet with the acid, print it on your pcb, then rince in the toilet after 3 minutes.
icee: yeah ..
e.g. you can't create a local static charge on something that conducts
jepler: mmhhh.. and it work ??
I feel bad for K`zan but I would feel worse watching him try to make PCBs on a plywood-and-dremel-tool milling machine
Jacky^: no, I just made that up
Jacky^: but someone would buy it
well, I am going to try to cook outside, even though it is raining a little.
Must have steak cooked on cherry wood!