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[on:]

hi all,

i'm new here and have a quick question.

I'm working on building a CNC with an Arduino as conroller

A friend gave me a few spare stepper motors but i have no idea what the best driver/controller are for this model.

PowermaxII
P22NRXA-LNN-NS-00
BIPOLAR
35VOLT
3.3AMP
Po: 62watt
1500rpm
8 wire (no idee wich does what at this time)

any help would be great.

[Reply #1 on:]

I found the datasheet eventually, see pages 45 and 135 of the Kollmorgen Stepper Solutions Catalog. Here is a summary:

NEMA23, 2 stack, winding type A (looks like the windings can be used in series, parallel or unipolar configurations)

Detent torque 0.12Nm.

Unipolar configuration: Rated current 4.6A, 0.42 ohms, 0.80mH per phase, holding torque 1.39Nm with 2 phases on.
Parallel configuration: 6.4A, 0.21 ohms, 0.80mH, 1.39Nm.
Series configuration: 3.3A, 0.84ohms, 3.2mH, 0.98Nm.

So it has 4 independent windings. For maximum torque, you should pair the windings in series or in parallel and drive them using a dual H-bridge. However, you can also wire it as a unipolar stepper, which is easier (no H-bridges needed, just mosfets) but has reduced performance.

[Reply #2 on:]

PS - with the windings in the series configuration, this http://www.ebay.com/itm/CNC-Micro-Stepping-Stepper-Motor-Driver-2M542-Bi-polar-2phase-4-2A-Switch-/290736116077?pt=LH_DefaultDomain_0&hash=item43b139116d might be suitable, but I've no idea if it is any good.