Re: [CAD_CAM_EDM_DRO] PIC DRO

In a message dated 05-April-00, Brian Muford writes:

<< The best thing is to use helical-slitted aluminum shaft couplers.
These are one piece of aluminum, which has one or more helical
slits in it, which makes it into a kind of spring. >>

Yes, if on is very, very wealthy! I recently thought of using those betwee
NEMA-34 steppers and lead-screws, and WOW! Pushing $100 each, for most
types! I have a little home-brew plotter I built using the 1/4" ID kind
(Came threaded for #1 SHCS to tighten clamp-ends! Every try to BUY just four
#1 SHCS's???!!!), and those came as "free evaluation-samples" from Helicoil
or one of those. Nice. But $40? How do they send those out as free
samples??? Hmmm...