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By: Anonymous: Terry () on Saturday, October 08 2011 @ 04:38 PM PDT (Read 1493 times)  
Anonymous: Terry

Will the motors on Sparkfun work with the Bot board?

sku: ROB-09238

Step Angle (degrees) :1.8
2 Phase
Rated Voltage : 12V
Rated Current : 0.33A
Holding Torque : 2.3kg*cm
5mm Diameter Drive Shaft

Form factor is ok but not sure about voltage and current.

Thanks






       
   
By: Windell (offline) on Saturday, October 08 2011 @ 07:46 PM PDT  
Windell

I believe so, but you'll need to provide a 12V + DC power supply, within the limits of the EiBotBoard; 30 V max, but the closer to 12 V that you can get, the better.


Windell H. Oskay
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By: Anonymous: Bruce Shapiro () on Monday, October 10 2011 @ 07:58 PM PDT  
Anonymous: Bruce Shapiro

Although the EiBot Board will certainly be able to drive this motor, I worry that because of it's relatively high impedance, it may not be able to accurately follow all the microsteps. Basically, the coil's resistance (12V/.33A= 36 Ohms) will likely cause clipping of the the "stepped" sine wave of current required for accurate microstepping, if you use the 9-12V "standard" DC supply (even with low motor current pot settings). The SF motor's specs are similar to the motors I used in early non-microstepping versions of the Eggbot,, but I had to change to lower impedance motors for this reason (the motors, shipped with the "modern" Eggbot, measure ~2.5 Ohms /coil (at least mine do)).

Distillation:
It'll work, but not nearly as smoothly as it should.





       
   



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