Re: New User

[q137 <q137-at-enteract.com>]

 Thanks Jon for the fast reply.  I guess I should have posted more
information on the machine.  The Westamp amps do have +/- 10 V input signal.
The encoders are quadrature encoders.  The machine is huge weighs more than
2,000 pounds and is only 2 axis.  The work area is 4' x 8'.  The X axis has
dual racks and the Y axis only has one rack.  The backlash is under .01.
This machine is used for sign making and I don't really need high accuracy.
  I am in process of d/ling the Jun 2000 release for emc and the prepatched
rtkernel.  I am gonna try the RedHat 6.1 installation first.  Is  there a
reason that you use RH 5.2?  I do have both versions of RH.
   Thanks
    Joseph Bury Jr.


Jon Elson wrote:

> q137 wrote:
>
> > Hi,
> >   I was thinking of using EMC on an old Cybermation Multicutter 8000.
> > This machine uses Westamp amps & servos.  It doesn't have ballscrews.
> > My question is EMC capable of running this type of machine and which
> > build would be best to install?
>
> Assuming these Westamp servo amps take +/- 10 V velocity commands
> and that you have some kind of quadrature encoders, then it should work
> fine.  The lack of ballscrews is a problem, but that is not just for EMC.
>
> You will have a significant loss of accuracy without good screws and
> nuts.  EMC versions later than about Mar 2000 have a backlash
> compensation
> feature that works.  But, no matter what CNC program you use, if the
> backlash is over a few thousandths of an inch, you will not be able
> to machine smooth circles.  If the backlash is over about .010", then
> you will have the danger of a crash when climb milling, as the cutting
> force can cause the table to suddenly be pulled into the cutter.
>
> It seems that the procedure for building EMC on Red Hat 6.2 has been
> pretty much solved, but I'm still on Red Hat 5.1
>
> Jon