Re: [CAD_CAM_EDM_DRO] Need advice on upgrading 2 existing CNCs

Is a Shopbot rigid enough to run at those speeds?

Do you really need to run 1200 IPM. Most of are happy at 200 IPM.

Bob Campbell
Bob@...
www.campbelldesigns.com
Breakout board
THC board sets
CNC router plans
Stepper Motors
VisualMill Basic

----- Original Message -----
From: "braidmeister" <braidmeister@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Friday, July 02, 2004 4:30 PM
Subject: [CAD_CAM_EDM_DRO] Need advice on upgrading 2 existing CNCs


> At the moment I am running Vexta 2-phase motors putting out about
> 305in/lbs ea. I believe that they are either NEMA 32 or 34 size. I
> have one machine that is a CNC router and the other is a CNC plasma
> cutter. I am currently controlling them through a proprietary
> control box which also runs proprietary software (I won't mention
> who's just yet)
>
> Currently I am only able to reliably run 150-180 IPM before I start
> losing steps. I would like to run the machine at 400-600 IPM and jog
> around 800-1200 IPM. I can upgrade one of the machines for a cost of
> about $7000 that will get me within these specs through the CNC
> manufacturer...Is it possible to get this performance at a lower
> cost???
>
> My 1st thought is to look into servos, but I have concerns with
> there being interference with the Hypertherm plasma cutter machine.
> I am also at a loss how to properly select a servo that will be
> closest in mounting, torque and target speed. The other option is a
> hybrid type stepper like Oriental's AlphaStep or Animatic's
> SmartMotor with feedback like a servo.
>
> Can someone tell me if a servo will reliably run on a plasma machine?
>
> What would you suggest, a hybrid stepper with feedback or servo for
> both machines?
>
> What kind of ballpark $ am I looking at to upgrade the hardware on
> one machine? (Steppers~Servos/power supply/Geckos etc)
>
> Where would you recommend that I purchase my motors to get the best
> deal?
>
> Any and all help is greatly appreciated!
> Thanks!
> -B
>
>
>
>
>
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