Re: [CAD_CAM_EDM_DRO] Microsteppeing drives

In a message dated 01-Oct-00 06:04:25 Central Daylight Time,
machines@... writes:

<< With a micro stepping drive taking the inertia needed to overcome friction
is it more likely for one of these to miss steps than a full or half step
system.?? >>

A good question, John, and one I shall have to keep my Yank eyeballs attuned
to, as I wonder, too! I suspect, however, the likelyhood a microstepping
drive will allow a skipped step is at least slightly-lower than "full-" or
"half-stepping". But I do NOT know, so, as said, shall be interested to see
what those with more brains say!

I am now finishing up two new home-brew "CNC" lathes with "bipolar chopper
drives" and "four-wire motors"; much more torque for same physical size.
Also, "factory-built" drives and power-supply in ONE small metal box, rather
than the home-brew kludge I had done on the old (but super-reliable and
"hard-working"!) unipolar L/R system I am still using. I will be even more
interested to see if this NEW bipolar system is more "mechanically imune"
from such as inertial-skipping nasties as the old unipolar! Will advise...

Jan Rowland, Troll