Hello guys!
I just assembled the electronics for my under construction CNC mill, however i'm having trouble getting any speed out of the motors.
Driver is a simple circuit based on L297 and L298, the motor supply voltage is 46volts.
Motors specifications:
Bipolar 2-phase
Holding torque 1.25 Nm
Nominal current 1.4 A
Coil resistance 4.2 ohms
Coil inductance 15 mH
I have been experimenting with EMC2 (linuxcnc.org), motors are currently set to full step. I can't get them above 250 rpm, they sound fine and run smooth, but when i increase speed over about 250rpm they sound the same but they don't spin.
Am i simply going to have to accept this? It seems a little slow to me but i don't know.
Thanks for answers.