RE: [CAD_CAM_EDM_DRO] Question on stepper control

Jeff,

You need one drive per axis so yes it would be 3 G201/210 drives. Yes
the Stepperworld unit fills the same function. No it will not have
anywhere near the same performace as the Gecko. There are not any drives
on the market that I am aware of which will give you the performance of
the Gecko (microstepping, bipolar, current limiting chopper design, 80 V
max) that are near the same price or less money. The stepperworld units
are unipolar resistor current limiting designs.

The disadvantage of going with a BTR is that the old Bridgeport drives
are very expensive to maintain. Also the Bridgeport drives run from a 3
phase transformer. So unless you have 3 phase you now will need it to
power the drive. BTW, the spindle is probably 3 phase also.

Tim
[Denver, CO]
Sherline products at Deep Discount
Mach1 & DeskCNC with credit card ordering
www.KTMarketing.com/Sherline

> -----Original Message-----
>
> I'm still trying to figure out the direction to take on the
> BP miller with antique NC controller. I came across to FET-3
> controller on www.stepperworld.com . Does this take the place
> of a Geko 210 (or 3)? Is it big enough to handle Superior
> Slo-Syn NEMA 42 steppers. The other thing I came up with was
> called a BTR (Behind the Tape Reader). This seems to allow
> retaining the current controller and being able to insert a
> serial signal from a PC instead of from the paper tape
> reader. Seems to keep a large, awkward controller, but all
> the wiring in side is already done. What are the drawbacks
> to this approach?
>
> Thanks again for your assistance.
> Jeff
>
>
>
> Jeffrey Goldberg, President
>
> Washington Computer Services
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