On Tuesday 04 July 2017 11:38:32 andy pugh wrote:

> On 4 July 2017 at 16:32, Gene Heskett <[email protected]> wrote:
> > Which would be hm2_[HOSTMOT2](BOARD).0.encoder.00.velocity,
> > which is noisy, 40% peak to peak running at about 25 rpms. That will
> > make Z sound very rough, but if it can keep up, I should get a
> > better thread.
>
> G33, G33.1 and G76 use motion.spindle-revs, and slave the Z to the
> spindle position.
>
> G95 feed mode uses motion.spindle-velocity-in.
>
> Two different things. I think we are talking at crossed-purposes.

Entirely possible, Andy. And I still haven't checked, got side tracked 
trying to grind a tool, and I think I've wasted my time, burning up a 
5/16" piece of tool steel because the alox wheel got dull and heated it 
up to bright red, several times. I cleaned a dressed the wheel several 
times, and it wound up exploding while just spinning free.  And I am not 
at all sure a .0485" wide tool with a .200 stickout, will survive 
makeing threads .075" deep in SS. I don't figure on any more than 5 thou 
per pass. And a tool I could shave with. I need a tool grinder but I 
can't see the $750-$850 for a well equipt one with a diamond cup wheel.

Dremel makes a nice disk, but the %$#@^@& mandrel and disk are special, 
and flex like cooked spaghetti.  I've got 2 of them stacked for improved 
rigidity but the dremels lowest speed still ablates the diamond in just 
a few minutes run time. And they are $20 a disk! Sigh...

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>

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