theorb is now known as theorbtwo
if you can drop the pressure requirement somehow it'd make life easier
Valen: That's what the laser calls for... 6"
hole saw will fix that ;->
Valen: Do you have to know the retail price for this laser?
more than my house probably lol
Yep, somewhere between nice car and left leg =)
Valen: I am NOT taking metal cutting tools anywhere near it =)
Wait.... let me check something....
There's not really room for a 6" round, but there MIGHT be room for a 4x6" rectangular opeing.
Valen: Ok, lets say I add a second 4" round opening, what benefit does that give me?
i don't know the details of the setup but if you remove things that restrict air flow you should get more flow at a lower pressure
The laser REQUIRES 250CFM@6" through a 4" round duct. But I know that you can manipulate the numbers there somewhat. What I'm REALLY looking to do is find a fan/blower that can provide the 6" but at 50dBa and closer to the 2Amp range.
Valen: A Hf DC is 660CFM, 9A, and close to 100dB. A inline fan is 250CFM@2" but is 50dB @ less than 1 amp
Valen: I'd rather invest in equipment than in power and noise pollution
you could stack the fans perhaps
Valen: stack how? Parallel?
more pressure, same flow
Wouldn't that make them work against each other?
you point them in the same direction
Right, but if the first one is a tad faster than the second one, wouldn't that be placing extra pressure on the second one?
you need a baffle in between so the air isn't rotating
the first one will put out 2.1", the second 1.9" it just isn't pushing as hard
provided the first one isnt doing 4" and the 2nd one -.5 its ok
I dont know enough about airflow like this... but in simple terms, I've had box fans running in the window, then a brreze will blow in, and I can hear the fan running harder becasue of it.
it will spin faster because there is no back pressure
also if its a normal AC induction motor it will want to spin at a set speed
But, what if I "Y" the opening to two parallel fans instead?
then it will want to do 500 CFM at 2"
its like batteries
the voltage is the pressure, the CFM is the amps
Valen: Hmmmm, ok. I need to think about this a bit
no guarantee about stacking them giving you a linear response in pressure though ;->
Valen: Yeah, I understand it's not linear in the least =)
if your only pushing to get the same airflow as its rated for it may work though
ey you've got a mill make your own ;->
I dont have a mill
what you guys think of this? http://cgi.ebay.com.au/SURFACE-GRINDER-JONES-AND-SHIPMAN-6in-x-18in-/170524539890?pt=LH_DefaultDomain_15#ht_500wt_1154
Valen, is that the downfeed on the right?
damn, I think I would bump into that with my leg , drop it .03" and destroy something
nfi, never even looked at grinders before
always nice and smoothe
we have a KO Lee at school that i really love
hydraulic feeds all around
Is there any way to load a G code file and estimate how long it will take to run?
Great, thanks cradek
Dave911_ is now known as Dave911
ichudov: Not possible with EMC
ichudov: I think under ABOUT
i love how he got 3 different answers
and that at least two of you guys must be wrong
cradek ftw when using axis
It works great as cradek said, File/Properties...
its not super accurate but it'll give you an idea
Dave911: wow, i got a reply from the service guy, he wants 775EUR for the plc program + machine data..
what was the color of the reply :)
as in blue
i believe it was black or dark grey letters on white background
dont you lot over the pond use the expression the air was blue, when a series of expletives are used :)
i have no idea what you are talking about.. :)
maybe somewhere people use it, but i've never heard it
neat, I got an 8mm endmill on a 1/8" shank
[10:07:18] <MattyMatt> http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=380118628277
postage = 2 quid on 2 sets
I hate to rewrite all my gcode to depend on them tho
ad says 9.5mm wide, but I measure 8.18
Gentlemen, this is a New Era in Dremel Material Removal.
weee! I'm off today
MattyMatt: rewrite what? don't you use radius compensation in your program just for issues like that?
DaViruz: I'd go back to the mother company and talk to them on the phone if possible... 775 Euro is about $1000 USD I believe... that seems way high to me for something that is copied off a disk... and that came with the machine originally... Or is that for the software re-installed?
I'd try and negotiate the price down. You do have an alternative; to put it in yourself and you should let them know that... I'd tell them that you may have to buy some machine parts also.. etc Just to let them know that you are still a potential customer, but not at that price.... ;-)
jthornton: So the boss let you off today ??? I thought the boss was a jerk - as it is where I work.... ;-)
I'm putting Ubuntu 10.04 and EMC2 on a 8 gig Transcend Compact Flash card... I'm using an Addonics adapter which I have used before with success. Has anyone run into any snags doing this with 10.04? What card adapters are you using? The Addonics devices are about $40 each with shipping.. The adapter fits into a card slot bracket. It is a nice setup.
[12:39:35] <alex_joni> http://www.addonics.com/products/flash_memory_reader/ad44midecf.asp
or this style: http://www.addonics.com/products/flash_memory_reader/adidecf.asp
thank goodness it's friday!
we had a tv program called TFI Friday
and the presenter said the F stands for what you think it does
isn't there a restaurant chain called TGIF?
americans... so weird.
do they close from Sat to Thurs?
elmo401?? damn internet kicked me again.
elmo401 is now known as elmo40
often the users wifi not the internets fault
CAT6 all the way
I am trying to pick up this old mill my work is junking. one part at a time... will have difficulties with the main casting, though :/
this may come in handy ;) http://www.teamrollingthunder.com/Mill_and_Lathe/body_mill_and_lathe.html
I make wooden tracks across rough ground to move stuff
a tilt-bed like the one in the first picture would be lovely. I wonder how much a towtruck would cost... probably $400 :/
then levers and rollers and a jack
lucky guy also got a lathe !
I wish my garage looked as empty as that guys, though :P where to actually put it... need to have a HUGE garage sale
build moooore sheds
lorry mounted crane is the fastest at getting something dropped on to your drive a good driver can also get near the door
a motivated driver can get even further
one LARGE issue... I live in a townhouse such as this: http://image.bayimg.com/eaonhaace.jpg
I think I am dreaming too much :(
unless the city will allow me to build a 'shed' on the front lawn, I will have to find a way to empty my garage.
crane over and put it in the rear garden
lol. and allow the chips to fly and be used for mulch? :)
alex: I'm using the Sata interface version of the card slot mount unit.. a few more $ for the sata version..
Dave911: I see
[13:55:53] <Dave911> http://www.addonics.com/products/flash_memory_reader/adsacf.asp
They do work well though. I tried others that did not work so well..
tell dave911 that $40 is a rip for those adaptors
you can get them for like $2
Valen: what you guys think of this? http://cgi.ebay.com.au/SURFACE-GRINDER-JONES-AND-SHIPMAN-6in-x-18in-/170524539890?pt=LH_DefaultDomain_15#ht_500wt_1154
sorry Dave911 didn't see you still here lol
[14:07:06] <Valen> http://www.dealextreme.com/details.dx/sku.711
How can they sell those for $2.04 with free shipping??
dunno but they have always shipped for me
Yes .. the Addonics cards are definitely not cheap!
they are a reputable company but be aware its like the biggest $2 shop ever
I don't follow ...
you are buying cheap chinese crap
it can be pretty crappy
OK... got that.. :-)
but they have port 80 cards for $2 as well
*really* handy when you need them
Thanks Valen.. super cheap.. I'll poke around the website and see if I can spend $10 ;-)
* Valen wishes Dave911 goodbye for a few days
(they have *lots* of stuff)
So I need to schedule a vacation for this website I guess ...
Are you a regular dealextreme shopper??
these are awesome btw http://www.dealextreme.com/details.dx/sku.19622
i just put a good battery in one and it is stupidly powerfull
sold out though :-<
yeah i've done a few orders through them
sometimes things can take a while to ship
try and get things that are in stock
oooh and it looks like it takes 3.6 volt cells, I'm going to have to try that
Dave911: if you get one try to get one that does DMA
Yes ... I ran into that problem before ...
going to get the dual one? so you can raid it up? ;->
also do you know if that flash is multi level i think it is?
(difference between 1000, and 100,000 write cycle life)
SLC is meant to be more robust
oh that card is rated for a million cycles so it should be fine
[14:25:18] <Valen> http://www.transcendusa.com/products/ModDetail.asp?ModNo=148&LangNo=0&Func1No=&Func2No=
I've been using the Transcend 133x CF cards in the 8 gig size but the 16 gigs are cheap now also ... I just loaded 10.04 on a 8 gig card about to load up Mozmcks deb files to get EMC2 running.
I need to figure out how to limit card writes in Linux.. I have two gigs of ram..
it should be fine by default generally
if you run top, it should show nothing in swap
I think I may have to block the dealextreme website to avoid screen burn out... that would be me... burning out in front of my screen.. :-)
the only other thing you may want to do is mount /var/log into a ram drive if your really worried
i always wind up spending ~$50 there ;->
i get like 3 packages though
once you go over some threshold you get free airmail shipping
I'm not really worried.. I am doing this for a customer and I am going to set them up with two flash cards.. one to use and one to swap if the first burns out for some reason..
I can see me getting to $50 pretty fast.. they have some nice stuff very cheap..
I'd tell them to replace it after a year or so
if they want to play it safe
If it dies... they will probably swap cards anyway just to figure out what went wrong..
Guys running servers that boot off CF cards don't seem to be reporting many problems with CF cards as is..
The way this system is setup - it is headless - so they really have no way of writing/saving files via operator intervention.. So I really only need to worry about the OS or EMC2 writing stuff back to the CF card. Like the Var file etc
With all of the RAM I have in there... I would hope that would prevent most random disk writes..
I run a SSD for my /
it is a purpose made SSD thouhg
I woudldn't worry about it too much
swap and logs are generally the biggest concern
logs because they will cause a write of a whole sector each time a line is added
Does somebody know if the pyvcp radiobutton has an initval too
Jymmm, hey... made any cool toast in your laser?
LawrenceG: Nah, the butter catches fire too much
LawrenceG: Actually, I'm still working on exhaust system, air scrubber, air assist, and cutting table.
I think a loaf of monogrammed bread would go over very well!
LawrenceG: You know, that may not be a bad idea... My friend isn't good and making toasts at weddings and stuff, so what he did is made some toast and at his wedding reception he pulled it out and waved it above his head and yelled "Toast". It was funny =)
im in truble with the pocket python script the G-code is exelent for rectangle circular but the Canvas from the tkinter is doing fancy outputs
What is a portable way to determine if the edges of an aluminum plate are true and square?
portable meaning I can't carry a granite table around with me =)
carry a machinist's square?
the plate is 12" x 24"
That would be a square. http://www1.mscdirect.com/CGI/NNSRIT?PMPXNO=4759993&PMT4NO=91669971
here the canvas code is ok -> http://www.pictureupload.de/originals/pictures/130810193057_pock_v1_rec_canv_spiral_square_ok.png
and here with Rec it is fancy ->http://www.pictureupload.de/originals/pictures/130810193155_pock_v1_rec_canv_spiral_rec_not_ok.png
the generatet g-code is always perfect B)
maybe i shoudt recalculate the point from the outside
[17:35:52] <IchGuckLive> http://www.pictureupload.de/originals/pictures/130810193057_pock_v1_rec_canv_spiral_square_ok.png
IchGluckLive: I personally do these sorts of things (deep pocketing, etc) using G-code subs. It works really great. I made all mine public.
i got it iculculedet X with Y
ichudov: where are your scripts
i like to have this missing python pocketing script in the Wiki
this is what most scale builder uses offen
i made the G150/G13 ngc public inti wiki
ok by till tomarow
IchGuckLive: my G code subs are here: http://igor.chudov.com/projects/Bridgeport-Series-II-Interact-2-CNC-Mill/_My-EMC-G-Code-Subroutines/
They are covered by the GNU Public License
Hello! I stopped a long time with watching EMC2. Now I will get a project and so I will have to get my old CNC mill working. I need a cheap 3-axis stepper driver with 2-3,5A. Somebody hewre who can recommend me something?
I have a xylotex, it's relatively cheap, but I would rather have a gecko
I don't want to pay lots of money. Approx 100 $ or a little bit more should be fine.
This is no high-power mill, this is a little CNC engraving machine which I want to adapt for milling plastic enclosures. So I assume that a cheap drive will be plenty enough.
until you short somethign, or a motor wire breaks
what size are the motors? are they unipolar or bipolar?
bipolar. outer dimension is ~2" or 3" diameter, length alsost the same.
the mill originally was driven by this crazy 287/298 chipset. But when I bought it for low price, the electronics was burned.
I tried to build my own drive with this 297/298 chips, but whenever I tried to get above 1A, the chip smoked. So I want to buy a ready made one.
Is this one fine? The XS-3525/8S-3 Stepper Motor Driver Board (Ver 2.03) $155.00
a xylotex is actually a bit worse than L298. I think xylotex is 24 volt max, and L298 is 40v. however, xylotex is a microstepper.
[20:08:12] <pingufan> http://www.xylotex.com/3axBoard.htm
xylo is 30v max I think
35 they write
I run mine at 30
From the shape of the heat sinks this cannot be a 297/298 one
atmega: did you add clipping diodes?
manual says they are not needed in "most" applications
My power supply also will not go higher. I would even think about a strong zener diode to brutally limit the supply in worst case.
Is this xylotex all I need, or does it need additional boards?
they recommend 30v but sell 24v supplies to run it
I bet at 30 it might tend to pop a little more frequently
pingufan: you need a power supply and cabling
Sure. But everything else is on this board?
at the top of that page click "What do I need to build a CNC system?"
Is there a drive you know which allows higher voltages and is not much more expensive. I prefer a bigger distance to max allowed voltage, too.
I don't know of anything between these low cost low voltage drives and geckos which are 80v? but 3x as expensive
(but probably > 3x as good)
I had a look at geckodrive before. They sell a <3.5A board for one axis for 65$. I don't remember the number. Is this much better choice?
It also has no protection against a short, etc.
So Xylotec actually has only two controllers: 3-axis and 4-axis. Ok. If I want to control the milling spindle, too (turn it on/off from PC),this is not available through a relais in the 3 axis driive. right? I'll have to lick out one unused pin and use transistor+relais?
pingufan: you're going to have to read their documentation to answer those kinds of questions - perhaps they have some outputs you can use or something.
This documentation is really poor.
I have never bought a xylotex product but I hear people use them and they are cheap... that's all I know
Ok. I'll contact them. I assume that my 27V transformer will be a good choice together with this big electrolytic cap.
27vac rectified is almost 40 which will smoke it
But only without any load?
27vac rectified to dc gives 27 sqrt 2
load has little to do with that fact
So I'll need a different transformer, too.
Or should I (better) take 3 of this ones?http://www.geckodrive.com/product.aspx?c=3&i=14471
They allow up to 50 Volts.
cradek: Will EMC2 run on a VIA C7-D 1000 MHz or a VIA C7-D 1500 board?
a few VIA C7 mentioned at http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Latency-Test
pingufan: There's also Keling: http://www.kelinginc.net/
is the Chicago, USA dealer, but they're manufactured in Asia, so I'm sure they have European dealers also.
Ha, exactly this PC2500G board I have!
looks like perfectly fine numbers
And this board reduces power consumption a lot. I use it in my Video player in the living room even for playing FullHD movies. :D
Well, I think I do better to take 3 Gecko 251 modules. They allow up to 50V, so I can keep my power supply and I have sufficiant distance to maximum voltage.
why not a single gecko 540 instead of 3 251s?
Costs a lot more?
not a lot more... and the 540 has 4 controllers and a breakout board
I want to integrate the controllers in my mill. The mill has an electronics box where the old drive was inside. I removed the damaged one and so I have a lot of space there for mounting 3 drives.
I have ony 3 steppers, so why shall I pay a fourth drive?
so you have a spare when one fries :)
personal bias on my part... I've never seen a gecko, but I'm not thrilled with my mounting of bare boartds
Shall I really calculate with that? :P
I thought gecko is so good? :P
so I've heard... no personal experience though.
I've had zero issues with my xylotex. I also do spindle and vacuum start/stop with it.
The xylotex can drive 3 steppers and switch 2 relais in addition?
all pins are exposed
Ah, so you added the relais drive by yourself to free pins. This is what I also plan to do.
yeah, I just used a pull down and an SSR
Exactly what I want to do.
Can I directly connect the parallel port data lines to direction+step inputs of a Gecko, or do I need opto isolators between?
built in isolation
Perfect. So All I need is some wired between the drives and the printer cable.
This is the perfect way.
for a g540
Allow me a question on EMC2. As this is a pure Gcode processor (or it was that >1 year ago), I need some tools to convert output of AutoCAD or other program intop 2.5D. I'd actually prefer to do everything on Linux, if possible. I use openSuSE 11.2. Something recommendable?
for three 251's, you need three PS wires, motor wires, breakout box and wires for the BOB to the drives, sounds ugly
?? Doesn't every G251 only need two wires (step and direction)? So all I have to do is use two data bits for X, another two for Y, another two for Z ? So there are still two free for milling motor?
there are 12? output pins by default
Oh. I want to integrate the cdrives directly into the mill's electronics box. There end the cables coming from the steppers, so I can directly connect them to the G251s.
does it have a breakout box? with optos?
pingufan: look at heeksam
No. Therefore I asked if the G251 has them built in.
But I can use my self built isolator board in between. This is already made.
here's that cutting simulation I have been working on: http://www.youtube.com/watch?v=Of3Hdgf0p2c
heh - funny. Either the wireless or the bluetooth would come up - not both at the same time (lucid). Finally rebooted into windows just to see if they both came up - they did. rebooted back into linux - now they both worked - many reboots.
awallin: cool stuff!
it looks better now, with marching-cubes
awallin: how long to render that?
alex_joni: uhmm, now it takes a long time for me, because I am moving all 100k triangles across the c++/python interface for each frame
but the simulation itself runs in under 1ms/CL-point
the cutter never actually "moves" as far as the simulation is concerned. it's just positioned somewhere, subtracted from the stock, and then moved a tiny bit and subtracted again
so you could speed it up by increasing the steps
maybe make it path adjustable.. if straight lines you can step half of the tool
or a bit less
the step-interval should roughly the same or a bit smaller than the smallest octree cube
with a cylindrical cutter you could step r/2 if it moves at constant z (I think)
How do I precisely home a 3-axis mill? I have end switches on obe end of every axis, so I can home the milling head. But then I also must enter somehow the offset of the milling tool?
well no actually...
the approach I am using is described here: http://www.cadanda.com/V2Nos1to4_11.pdf
awallin: anyways, very cool stuff
Ok, I'll await the answer of gecko...
yeah, this is much better than my previous attempt. also this is general enough for 5-axis or lathe.
I saw mocca has a similar thing built in
maybe we could add an option for AXIS too (when it works ;)
newish GUI for emc2
can't tell from the pic if that does 5-axis, maybe not?
not if it's the algorithm from gdepth
Fox_M|afk is now known as Fox_Muldr
Fox_Muldr is now known as Fox_M|afk
anyone have an opinion on Cinncinatti "Toolmaster" vertical mills? <insert punchline> http://racine.craigslist.org/tls/1885557708.html
mendelhugebill is now known as Mendel|beer
looks like box ways and a nice wide saddle
[23:06:34] <L84Supper> http://cgi.ebay.com/CNC-Mill-Nasa-II-CNC-Vertical-Mill-No-Reserve-/220653327013?pt=BI_Mills
this might be worth it
Utilzation: 6422 Run Hours
three years of one shift
unless they had it in an outside open air shop, it would be hard to believe that it has much wear
check disk manager and see if you can assign it a letter