Are the Zapp 3NM steppers good with their PM-752 drivers?

[Jonathan]

you need 66% of the total motor peak current... so 3 steppers at 4A/phase = 3 * 4 *.66 = 7.9A. @ 60v thats 420VA

remember that measuring phase current with an analogue device will show the RMS phase current. With a digital meter you are unlikely to get a useful reading because its highly spikey.

I thought it was 8 amps per motor, since there's 2 phases?
Anyway, I got lucky and won a 500VA toroidal transformer for £20 on eBay so I'll be using that.

I changed the pulleys round (had to bore them out to the right diameter and stuff) to get 1:1. Now I'm getting 42mm/s on the X axis :)
Bad news is the Y-axis for some reason refuses to even go at 25mm/s without stalling the motor. Not really sure why, maybe something to do with the belt tension and how tight the nut is...
Not tested the Z yet.