DPReview.com is closing April 10th - Find out more

CNC macro rail

Started Jun 30, 2015 | Discussions thread
grasshpr
grasshpr Contributing Member • Posts: 540
Re: CNC macro rail

Depending on your load, you may need to stiffen up your shaft along the radial direction. Something like this: http://www.pbclinear.com/Linear-Shafting-Support-Rails

If your load starts bending your shaft, it will bind on your linear bearing.

A recommendation for a simplistic linear motor instead of using a home made ball screw assembly is this: http://www.robotshop.com/en/firgelli-technologies-l12-30-210-12-p.html

They come in all different lengths and have built in potentiometers (pretty easy to measure in comparison to encoders).

 grasshpr's gear list:grasshpr's gear list
Sony a6500 Sony a7 III Sony DT 16-50mm F2.8 SSM Sony E 55-210mm F4.5-6.3 OSS Sony E PZ 18-105mm F4 G OSS +9 more
Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow