Re: Stepper Drivers and Motor sizes

You can buy a 110/24VAC 10 amp transformer from Marlin Jones for $18.
That and a full wave recifier and an good electrolytic cap of about 15000 UF
50 VDC should be all that you need. Don/t forget to add switches and fuses
on both sides of the transformer. The output will be 36-39VDC at 10 amps.
The whole thing should about about $40

If your drivers are adjsutable you can set the current to the stepper motor
that you are running. I run .85 amp motors on my 5 amp drivers all the time.
Just set the current lower.
Dan
-----Original Message-----
From: pyroware@... <pyroware@...>
To: CAD_CAM_EDM_DRO@onelist.com <CAD_CAM_EDM_DRO@onelist.com>
Date: Monday, May 24, 1999 2:27 PM
Subject: [CAD_CAM_EDM_DRO] Stepper Drivers and Motor sizes

>From: pyroware@...
>
>I have been having a lot of fun writing motion software for my Arrick

Stepper controller (Thanks Dennis!). Interestingly, I have found the 32-bit
Visual Basic software I have written so far to be every bit as fast and
smooth as the provided DOS software.

>
>Anyway, the system normally uses 4.0 amp, 3v Unipolar NEMA 34 motors. From

my research, am I correct in stating that Step motor drivers are constant
current supplies, and that if I use a dinky little stepper that I risk
burning it up? How careful must I be in matching motors to this driver? I
would like to use a pair of smaller, NEMA 23 motors for my special
application.

>
>On another note, the prices of unregulated DC supplies in the 40V 5A range

are scary. Are there any special considerations to "rolling your own?" It
would seem a worthwhile project to save some $$.

>
>Thanks gang!
>
>Kurt
>
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