Hi Team,
Customer use the following parameters here, and a continuous and complete PWM waveform can be measured at AOUT1 of the EVM.
But under the same conditions, I have measured incomplete waveforms on our PCB (please see the picture below). What conditions can cause this phenomenon
Motor parameter：
Full Step
Frequence：600Hz
PPS：300
Torque_DAC：5% / 41mA
Winding resistance : 215ohm +-7%/phase
Hi Kygo,
1. I would check if motor is connected properly ie. if wires of phases A and B are not mixed.
If they are connected properly you can try the following steps.
2. Can you verify that voltage at VREF is around 0.72V (divider works properly)
3. Can you share Register values? The best way to be sure is to read them back.
4. It would be good to measure motor current as well but some low current probe would be needed and/or
use a few turns to increase its sensitivity, if you have only 2-ch scope, please make current+voltage and current+steps measurements.
Source: www.tmatlantic.com/.../index.php
5. I would try to increase TORQUE_DAC and VREF and watch for changes in output waveforms.
If motor nominal voltage is 12V or more you can safely run it with driver settings for higher currents.
Regards,
Grzegorz
