Re: Need help with Mill/Drill retrofit

With such high effiency the ballscrews on a manual mode have a very
real possibility to letting the table fly the lenght to the stop.

if a cutter digs in, the resultant torque imparted into the workpiece
ergo the clamps and table, will have considderably more force than a
shorted stepper. And the screw offers no resistance.

Think of trying to brake your car on ice.

--- In CAD_CAM_EDM_DRO@y..., bjammin@i... wrote:
> At 07:30 AM 10/11/02 -0700, you wrote:
> >If you use ballscrews, then you may have problems in the manual
mode
> >(turning the crank).
>
> Not necessarily. One way is to use double-ended steppers which have
a
> certain amount of holding even when off and esp if off and shorted.
The
> handwheel goes on the dead end of motor shaft. The rest of setup is
left
> as-is.
>
>
>
> Regards, Hoyt McKagen
>
> To prevent virus propogation, don't put this addy in your book
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