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Thanks Bojan.
The controller that the motors came with uses only 6V (4 D-size batteries) and I think that this is way below the motor rating (6V/17Ohm=350mA per coil) considering their size. The original controller only allows stepping of up to 8xR.A. speed which is about 80 steps/s.
I managed to step the motor at about 200 steps/sec (full stepping) which is very slow for slewing from one part of the sky to another. I was hoping to run them at their real rated voltage/current to be able to run them faster but I am not sure what the real ratings are.
I was also hoping that the motors might be the same as the motors that come with EQ5-GOTO kit. Hence my question about the specs/models of the EQ5-GOTO kit motors.
Regarding determining the maximum current/voltage of a steppermotor by monitoring the temperature, I managed to kill one stepper several weeks ago (at work) and it was just running slightly warm, not hot at all. Hence I am being overly carefull now.
P.S.
Also you probably ment 350Nmm or Ncm and not 350Nm - this would be extremely high for such small(ish) motor.
By the way, if anyone is buying stepper motors from Farnell, they have a typo on their website showing Nm instead of Ncm for quite a few steppers.
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