My Hall effect limit switches worked so well, I decided to make a Hall speed sensor for my mill’s quill.  You can read the dirty details here:

http://www.cnczone.com/forums/showthread.php?p=543898#post543898
or
http://tinyurl.com/8kcmu4

The bottom line is the sensor works to my mills 4,000 rpm limit and down to 60 RPM.  Below 60 RPM Mach displays 0.

Vince

Nice job.

Christmas job for me - ball screws.

Cross slide is done - speed up from 20 in per min to 1000mm per min without effort, will probably go higher. Since I only have about 10 inches total movement, thats fine.  No measurable backlash I can detect - I'm having another look at that today. (Now in mm, please note Hood)

Just the lead screw to do - but I can't turn it because my lathe is in bits - will have to wait for a friend to recover from Christmas.
Huh - some people !!!

'Tis the season for more projects.  I'm taking 10 days off from Christmas to January 5th.  Next I hope to get a RPM sensor on my lathe, weld up a stainless steel door for my wife's storage shed and clean up a lot of junk in my garage so I have room for more toys.   Lots of stuff for eBay.

Vince

Forget the welding and the cleaning - Happy New Year.