At 23:44 27.7.1998 +0200, you wrote:
>Greetings!
>
>I am rather new to stepping motors.
>
>I have only made driver for small motors and used very slow stepping with
>constant voltage.
>
>Now I want to drive a larger bipolar stepping motor.
>Requirement is about 2-4A per winding, peak voltage upto 45V.
>
>Anybody know a nice driver for that?

Ericsson make nice driver  (PBL 3776) capable driving up to 5 Amp, 45 V
with external MOSFETs. Currently I am designing the XYZ stepper driver for
my small mill CNC retrofit. Those chips works like a charm, but don't try
to exceed the maximum voltage, I fried two of them when I experimented with
power supply for motors. Better to be a bit conservative and use something
around 40 V.

Also, Ericsson have a lot of PDF files about the stepper problematic on
their web site (www.ericsson.se)

Best regards

PavelK

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* Pavel Korensky                                                         *
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* SUMMA SCIENTIA - NIHIL SCIRE                                           *
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