Re: [CAD_CAM_EDM_DRO] Re: Rotary to linear translation - an interesting idea.

"D.F.S." wrote:

> A Calcomp 1042GT.

Mine is a 1076C, really top of the line at the time. I think it listed
for $17,000 !
Mine has been VERY stable, although I don't use it a lot. The biggest
problem is
getting the pens working again after long storage.

>
> It can't run for 10 minutes without loosing it's brains.
>
> Haven't tracked that one down yet.
>
> Not that that has any real bearing aside from the suggestion to
> add some decent diagnostics and failure logging to any system
> we build here.
> It would be a good idea to have it sooner or later, when a
> sensor goes off or gets dirty.

Well, EMC is actually pretty good at that, if you set the following
error
limits fairly close. I had some trouble with my early servo amps that
caused the Z axis to stick once in a while. I set the following error
limits down, and the machine would stop and allow me to unjam the
axis. I finally gained the confidence to turn the current limit way up,

which that motor needed, and haven't had the trouble since.

Jon