Re: shaft torsion ?

My point was that there are "machining" loads, even at constant
velocity, that may cause "windup of the shaft. I was just interested
why this was not a problem in practice. I assumed it is due to the
relatively low level of precision required with this type of machine.

Phil

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "carbonsteelsam"
<corryharper@...> wrote:

>
> Not unless they're overpowering your motors or there is an

extremely

> biased friction load from one rail to the other. With good setup &
> alignment the rails should perform pretty much the same and the
> pinions would easily handle minor side-to-side fluctuations.
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Philip Burman"
> <philip.burman@> wrote:
> >
> > Are frictional loads at constant velociy not an issue.
> >
> > Phil
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, Kevin Martin <kpmartin@>
> > wrote:
> > >
> > > In the original message the system was described as "5 foot

wide

> > gantry on a plasma cutter" so there are essentially no machining
> loads
> > (unless you count the recoil from the plasma jet).
> > > -Kevin Martin
> > >
> > > -----Original Message-----
> > > From: CAD_CAM_EDM_DRO@yahoogroups.com
> > [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of
> carbonsteelsam
> > > [...]The real differential loads will result when the router is
> to
> > the extreme end of its travel and is under heavy cutting load.

[...]

> > >
> >
>