I wanted a cheap solution with four axes and stepper motors with little demand for torque.
The best I was able to find was:
1 arduino as the controller (I like programming in C)
4 drivers from futurlec with no instructions...
4 Minebea-Matsushita # 23KM-K246-01V hybrid stepper motors with no datasheets
I used the Stepper.h library and all looks just fine, but:
a) the only speed I get decent motion is at about 300 steps / second
below that I get jerky movements to both sides
above about 1000 steps / second the motor comes to a halt and
makes a much higher pitched noise.
b) the arduino, connections and everything seems to be connected well
and my suspicion is that I have the wrong power source for the drivers
(one for now). I use a 12V battery just to make sure it's stable enough
and has sufficient juice.
c) I tried moving it 50 steps forward, 50 backward, 200 forward, 200
backward at 300 steps / second and it seems to go fine forward, but
kind of stays in the same spot and vibrates on its way back
d) the heatsink gets really hot at 12V just after 20sec of working so I
must be doing something wrong
I would very much appreciate any help, but I believe I either have too big motors, bad power source for the drivers or some kind of driver power output setup.
If anybody can find the the datasheets for the motors and some kind of manual or example for the drivers from futurlec I might be able to solve the problem myself.
BTW, I doubt the connections from the arduino to the driver or from the driver to the motor are mixed up. I tried switching them around just to see if I messed up somewhere and it just got worse.