RE: Bridgeport stepper setup with RC-500

> From: David Carter
> Sent: Wednesday, September 04, 2002 8:21 PM
> To: ahha_cnc@yahoogroups.com
> Subject: Re: Bridgeport stepper setup with RC-500
>
>
> Hey chuck, this is dave in arkansas. When i did my boss
> retrofit i called ahha and they sent me the wiring diagrham
> for the motors. If memory serves my right you set the motor
> switches to 10 amps. As far as the steps you will just have
> to play with them. I run my z- axis a little slower than my x
> and y axis. If you need i can power up my machine and tell
> you what setting i am using. I have just bought a 97 torq-cut
> 22 by bridgeport so i am playing with that a lot now. Any
> questios i will try to help. Dave

Hi Dave,

I just found 3 documents on AHHA's web site and they do mention setting the
current to 10 amps but then concentrate mostly on the limit switch
configuration.

The documents I saw do not mention if the 10 amp setting assumes series
windings (10 amps through each coil), parallel windings (5 amps through each
coil), or single winding (10 amps through one winding) configuration in each
motor phase. These are all options with the 8-wire motors. Do you remember
how wired yours?

They do mention that you can use the 'existing' wiring. Since the two
windings of each phase are jumpered together at the motor this would mean
that they must be using either one winding per phase or the two windings in
series (i.e.: not windings in parallel)....

Cheers,

Chuck Hackett
Omaha, Nebraska, USA
7.5" gauge UP Northern 844