Steppers for Converting Sieg X2 to CNC?

[irving2008]

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
https://docs.google.com/file/d/0B_5R...wtUGxvVW8/edit

There's a big issue with those drivers - the current setting is not via switches but by twiddling a variable resistor while measuring the current in the windings. That's not easy to do without appropriate test equipment, a cheap digital multimeter on DC Amps setting will be wildly inaccurate as it cant sample fast enough

[Jonathan]

There's a big issue with those drivers - the current setting is not via switches but by twiddling a variable resistor while measuring the current in the windings. That's not easy to do without appropriate test equipment, a cheap digital multimeter on DC Amps setting will be wildly inaccurate as it cant sample fast enough

One might be better off in that situation measuring the supply current and voltage to the driver, then since you (should) know the resistance of the motor at low speed, the required supply current can be estimated fairly accurately by considering the rated power. Adjust the potentiometer to get that current. The supply current should be measurable accurately using a cheap meter due to the filtering effect of the DC-bus capacitor.