Just re-reading Jazz's post Number 132.

The Amps should match or be close to the Motors rating as possible. Good drives will let you set exactly to match motors but If no exact match then set to next lowest. You'll just have lower than rated Torque but better than going higher and having more motor heating.


Here is a link to the spec sheet for my motors.
http://cnc4you.co.uk/resources/Stepp...1-03%204Nm.pdf

It seems to suggest they are rated for 4 Amps (if I understand the spec correctly). Hence the 3.8Amp suggestion i guess.

So where do i go from here i suppose is the question.