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Electronic Leadscrew for the New Lathe
vtsteam:
Already saw it last night Bertie. Nice theory and prototype info, but is there a board or kit available?
I like the one Eric posted a video for, since it seems to use off the shelf Arduino and Arduino Shield, but much more info needed. Software available? How well does it cut threads? Does it require that Shumatch DRO in the video to work?
Pekka, if I have to mess with gears for threading, might as well go whole hog and skip the electronics just for feed.
I still do wonder about the master thread follower type (unimat style) as possibly the simplest mechanical type.
Then I start thinking take it off the lathe altogether and just make some kind of hand cranked threading machine. Seems like a lot of people just crank the spindle by hand anyway, so why even thread on a powered lathe then?
I guess a master screw and follower wouldn't be practical for making long pieces, leadscrews and such, but my lathe is going to be 12" between centers, so would I really need big threading capacity anyway?
bertie_bassett:
im sure iv seen something similar that was complete and working, don't think it was a kit, but showed exactly what was srequired . unfortunalty iv no idea where I saw it, might have it saved on the old laptop, will take a look tomorrow if I get a chance
PekkaNF:
--- Quote from: vtsteam on March 27, 2015, 06:13:12 PM ---Pekka, if I have to mess with gears for threading, might as well go whole hog and skip the electronics just for feed.
--- End quote ---
jea but, no but,
feeds are used pretty much all the time
threading only max. once per part
AND you want to use them in alternating order....no need to change gears (yuk) until thread pitch needs to be changed.
I could setle electric motor wth variable feed (mm/r) but rpm of it must be ofcourse controlled by spindle rpm. There is allways manual control like in manual crankking, but pretty often it would be nice to "dial in" feed, even if it is off by 5-10%.
I saw a little writeup on MEW I think few years back. Someone tried two popular ELS systems and he was able to produce thread, but they did not were really that impressive and he needed to get the parameters close to right. Least that was my impression. I desided it wasn't for me. Looked like it made easily thread looking form, but did not produce goog quality threads consistently.
--- Quote from: vtsteam on March 27, 2015, 06:13:12 PM ---I still do wonder about the master thread follower type (unimat style) as possibly the simplest mechanical type.
--- End quote ---
http://img18.photobucket.com/albums/v55/EPAIII/SetUpOnTable.jpg
http://bbs.homeshopmachinist.net/threads/5095-Thoughts-on-a-fusee/page4
If you anly need short threads I can see the attraction to that threading "formers and followers" method.
--- Quote from: vtsteam on March 27, 2015, 06:13:12 PM ---Then I start thinking take it off the lathe altogether and just make some kind of hand cranked threading machine. Seems like a lot of people just crank the spindle by hand anyway, so why even thread on a powered lathe then?
--- End quote ---
I remember seeing a picture of crude "screw lathe" that was used on mass proction around WWII. One machine more and you loose "register". But it would me interesting to see.
Pekka
Country Bubba:
--- Quote from: vtsteam on March 27, 2015, 10:35:20 AM ---Somebody needs to come out with a 5 volt single board computer the size of a credit card that runs DOS natively and has a CNC compatible parallel port and a B/W LCD display capability. Doesn't even have to be more than 100 Mhz and look like a 486.
Or better yet, we need a DOS tablet, with a parallel port! :lol:
--- End quote ---
Hey Steve, how about this box for dos??
http://www.roboard.com/ncbox-189.html
And it can be found here:
http://www.robotshop.com/en/roboard-ncbox-189-cnc-machine-controller.html
And their located in your part of the world!
Robotshop inc.
555 VT Route 78 suite 367
Swanton, Vermont, USA, 05488
John Stevenson:
--- Quote from: Country Bubba on March 28, 2015, 08:30:51 AM ---
--- Quote from: vtsteam on March 27, 2015, 10:35:20 AM ---Somebody needs to come out with a 5 volt single board computer the size of a credit card that runs DOS natively and has a CNC compatible parallel port and a B/W LCD display capability. Doesn't even have to be more than 100 Mhz and look like a 486.
Or better yet, we need a DOS tablet, with a parallel port! :lol:
--- End quote ---
Hey Steve, how about this box for dos??
http://www.roboard.com/ncbox-189.html
And it can be found here:
http://www.robotshop.com/en/roboard-ncbox-189-cnc-machine-controller.html
And their located in your part of the world!
Robotshop inc.
555 VT Route 78 suite 367
Swanton, Vermont, USA, 05488
--- End quote ---
No mouse terminal ?
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