Experimental Physics and
Industrial Control System

"Guy Jennings" <[email protected]> · 11 Jun 1997 12:41:50 -0500

                                             6/11/97            12:31 PM

Kurt A. Goetze wrote:

> Guy Jennings said:
> >
> > Just ran into a potential gotcha with the ACS SPD-3M Microstepper
> motor
> > drive module.=A0=A0 It is NOT a drop-in replacement for the SPD-6U
> > drive!!!=A0=A0 The SPD-3M is a bipolar drive and needs different
> connections
> >
> > when used with a 6-wire motor.
> >
> > Users beware!!!
> >
>
> I guess I would like to know more about how your motor is wired up.=A0
> My
> experience is that the SPD3M worked well as a drop-in replacement for
> the
> unipolar StepPak drive (using a 6 or 8 lead motor).
>
> Kurt Goetze
> APS/XFD/Beamline Controls

Please ignore the Netscape-related drivel in my previous two postings.
I have changed back to Quickmail!!

We are using the connections in the APS 'standard' (I think!).

For the SPD-6U:
ELCO Signal   SLO-SYN 6-lead
A    Ph 1 Out Red
B    Ph 2 Out Red/White
C    Ph 3 Out Green
D    Ph 4 Out Green/White
E    Ph 1 Ret Black
F    Ph 2 Ret Black
H    Ph 3 Ret White
J    Ph 4 Ret White

This corresponds with Fig. 4.2 on page 17 of the ACS manual (Jan 1997).

This does not match up with any of the connection diagrams on page 24 or
25 of the
ACS manual.

I was able to succesfully move the motor with the following connections:

ELCO Signal   SLO-SYN
A    Ph 1+    Red
B             NC
C    Ph 3+    Green/White
D             NC
E    Ph 1-    Red/White
F             NC
H    Ph 3-    Green
J             NC

This corresponds with Fig. 5.2 on page 25 of the ACS manual.

Interestingly enough, we had previously tried the microstepper drives
with an
8-lead motor and found no problems.

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Experimental Physics and Industrial Control System

Experimental Physics and
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