Basic problem is that I am not getting anywhere near the expected torque out of a NEMA 23 motor driven by a Tic T249 board.
- Main system is controlled by an Arduino which is communicating speed and direction of rotation via serial to the Tic T249 board.
- Power is an DC power supply with 24V and max 3.8A output
- Motor is a Bipolar NEMA 23 with a planetary gearbox driving some larger gears.
- Tic board is set to Full Step mode, with current limit of 1840mA. AGC is off.
- When I drive at 220.0000 pulses/s, the motor draws about 330mA without any other torque load
However, when running at 220.0000 pulses/s I can stall the motor and cause missed steps with finger pressure at the end of the gear train. Watching a power supply, the current draw is about 440mA just before the stall.
If I try and run at lower RPM, e.g. 80.0000 pulses/s, I get a lot of skipped steps - we don’t move in a single direction.
I can run up to 1200.0000 pulses/s and see a draw at the power supply of about 450mA. With light finger pressure, I can watch the draw go up to 550mA and at about that point the motor stalls and the draw drops to 170mA.
If I drop, on the Tic board, the current limit to about 1440mA, there is less shuddering and things seem to run smoother(e.g. no halting at 80.0000 pulses/s), but same torque issues persist.
My sense is that it shouldn’t be this easy to stall the motor and torque closer to the max permissible torque of 40Nm.
Thanks for any insight and help