Here you are:
Straight through shafts as well (they're 6.3mm) so potentially can still have manual control.
They're 6 wire ones but as I understand you just omit the centre tap wires for each coil to use as normal 4 wire ones, depending what the controller/driver actually needs.
47mm between mount holes, which I understand is the normal pattern for Nema23.
6 wire explains why they'll be so poor. Designed for unipolar drivers. Yes you can run them on a bipolar driver by not using the centre connection but that's essentially bipolar serial which is the highest inductance, lowest performance.
The other point to note is those drivers will have to be set to 1.8A as the next setting is 2.5A and the steppers are rated at 2.1A. You might get away with the higher setting but they will get very hot. At 1.8A setting you've lost 15% of the little torque you had.
But give it a go, you can always replace them with proper steppers later. :)
Last edited by irving2008; 01-04-2014 at 07:37 AM.
Thanks, that's useful info on the current settings. I think I've got fans that might fit on these in the same box but will check.
I don't mind replacing in due case as they were free, but useful for getting something assembled hopefully and testing on principal that the whole setup will work.
Does anyone happen to know if there is such a thing as free .stl files for mounting hardware?
Wushful thinking I suspect!
If you ignore the centre taps then you'll be wiring them full-coil bipolar - this will double the resistance giving a rated current of just 1.05A.
You'll get more torque from these motors if you wire them half-coil bipolar. i.e. use the centre taps and ignore two end coil wires. Then the rated current will be the 2.1A stated.
ive got a complete syil kit(electronics only) I may let go if you or anyones interested that's all the electronics plus the nema 34 for the z and the 2 nema 23 motors the electronics are in a makeshift control box(pc case) all wired up just requires the motors to be rigged up,the kit came off an x3 the specs can be seen here
Could be tempted potentially, thanks, but I'll look up the details and see what it all is.
Useful summary here:
UniPolar vs BiPolar wiring schemes for 2-phase Stepper Motors
Last edited by Jonathan; 01-04-2014 at 12:23 PM.
So assuming they are 1Nm (141ozin) motors:
Bipolar 1/2 coil: Rated 2.1A, run at 1.8A, torque = 1.8/2.1Nm = 0.85Nm (120ozin)
Bipolar Series: Rated 1.47A, run at 1.2A, torque = 1.2/1.47 *1.4 = 1.14Nm (160ozin)
So run them Bipolar Series since you'll get low feed rates anyway due to leadscrew inertia and frictional load...
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