Re: Specs on Sigma Stepper for Series I Bridgeport?

Hi Les,
You brought up a really good point I dont think we've considered on
these retrofits: specifying if its a seriesI or a II for these
stepper wiring. My steppers stalled when I accelerated too much so I
tried series coil and could get better speeds.

I've got the 1978 version seriesII with the monster 4Jhead. Looks
like a dinosaur with a really big head and back problem :-) It had
the big squarefinned sigma steppers. I'm in the process of swapping
out the Z axis for a servo. It has an air assist cylinder( I run
about 45 to 64psi ) on the Knee ballscrew to offset the weight of the
whole knee section. But it also causes new minor backlash issues if I
use to much air pressure.

Thanks,
-Lee

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Les Newell <les@l...> wrote:
> Hi Lee,
> Mine is a series 1. I always thought series 2s were servo.
>
> Les
>
> Lee Studley wrote:
> > Hi Les,
> > I sold off my original steppers, wish I could try that( your
> > suggested ) combo again. Is yours a series I or II? table weight
may
> > be the difference. Tahnks I'll file that info my stepper archive
> > stuff.
> >
> > -Lee
> >