I thought linear motors are essentially stepper motors unrolled. The picstep guy, (Garfield?), has driven a linear motor with his picstep. Not sure if he had specialized firmware. ...
Type: Posts; User: jimbo
I thought linear motors are essentially stepper motors unrolled. The picstep guy, (Garfield?), has driven a linear motor with his picstep. Not sure if he had specialized firmware. ...
foam27, Thanks for the pictures. You did a good job on that frame. Its funny, I have many of the same pieces. I am still in the parts acquisition and design stage. But I do have (4) 76" IKO LWHD...
foam27, I'd like to hear more about your machine if you have the time. I am building something very similar. I have the same ballscrews and a 48"x60" work area. It will be a moving table design.
BoB C., Sounds like you are well on your way. I would certainly be up for a meeting. I just moved in March and am now looking to start my router build up next month as well. Turns out my neighbor...
Hello all, I was wondering if there was any progress on your routers. Jim.
sorry, thats what I meant. I was curious about any synch issues with the slaved motors, either physical or software.
very nice bloy2004, did you have any difficulties with the dual ballscrews? You did a nice job.
another cad program ProgeCad LT, http://www.progecad.com/
unterhause, yes, fully aware of the bdi but they are usually a bit lacking with just the basics or out of date software. I have tried a couple of them, never liked the default software they...
style 3 is probably easiest to implement as mentioned. but I am thinking of using a rail on top of the gantry away from z, then the second rail on the front of the gantry near the bottom. This puts...
sweet, I will try this also. thanks for hte link.
abomb, I guess you are referring to me. I got the rails at a local surplus store. Bought the rails one day, then the blocks 1 week later which were found in a different part of the store, that is...
Another link I have seen posted here before is http://www.lmwatts.com/straightedge.html
Look at http://cnczone.com/forums/showthread.php?t=11024, it is the only diy router that I know using the metalized epoxy for joints and rails. He has a pretty good write up on his site.
Wow, that's starting to look pretty sharp! Don't know how I missed your last update. keep the updates coming.
Jerry, I did a little research. Found this site, http://www.qtcgears.com/ and this guide in their library documents, http://www.qtcgears.com/Q410/QTC/Q410P392.htm. I don't understand the...
Jerry,I believe you have to order them with that option. The ends will be custom ground and matched from the factory. I think it would be difficult to do yourself.
Part of the reason the linear...
Jerry, Makes sense. I didn't realize that gear rack could be as good as 0.003 over its length. This is better than most rolled ballscrews, which are around 0.004 per foot. I have some gear rack,...
No the rails were bought at a local store. I found the rails in one part of the store and the blocks in another section hidden in a box. They had been there a while so I got a good discount. Hey,...
Unfortunately, just baby steps right now. I have a small plywood router that is almost up and running, just need to get z hooked up. It is only going to live long enough to make parts for better...
yes, it has been used by a couple members here. Search for 8020 bearing on this site and you will find many threads...Can't comment on how well they work.
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very cool, I can't imagine the effort it would take to build a plane. I am interested in a machine like this for doing car molds and maybe boats too. Definitely keep us posted...
Hello Jerry, those prices were from http://www.automation4less.com and http://www.technico.com/ respectively. I have never ordered from either of them, just stating the prices they have. If you do...
hello, just interested in this thread. Can i ask why the gantry needs to be 1200 lbs? this is quite a bit of mass to sling around. Also foam would have basically zero resistance. Have you...
very cool. reminds me of this older site I saw which is very similar, http://freeandeasy.sourceforge.net/rotproto.php.
very nice. one of the cleanest I've seen. please post your results when you get it running.
nice find. You could use the timing belt to drive the axis, but I would only recommend for light materials such as foam and wood, not metal. If there are no setscrews on the pulleys then they are...
nc cams,
yes, I agree backlash still needs to be accounted for even after the ballscrew has been mapped. The backlash I was referring to was using the two ballscrews side be side during a mapping...
nc cams,
thanks for the info. I figured it was something as simple as that. What about using a higher class ballscrew to map it, ie have a stage with a servo. move (via computer) the stage a...
Nc Cams,
How does one map the lead error of the ballscrew? Is there an alternative to a laser inferometer? How can large distances be mapped without accumulating errors in the measurment?