User Manual

Sinusoidal Commutation
Advanced Digital Motor Controller User Manual 117
FIGURE 8-14. Sensor Linearity Capture and Correction
The linearity of the sensor will be displayed on the screen. If the graph is flat at around
zero value, the sensor is linear and no correction is needed. If the shape is not a flat line
and is clean (i.e. without random noise and glitches), press “Apply Correction” button. It
can be beneficial to capture the linearity curve a few times and verify that it is consistent,
before applying it. If the graphs is noisy, has glitches or looks otherwise unusual, then
press close an do the Sensor Linearity procedure again. If the performance is not better
then the correction can be cleared by pressing the “Reset Linearity Correction” button.
Basic Motor Check
After the Automatic Setup completed successfully, the motor is ready to run. Use the
sliders on the Diagnostics Tab or on the Run Tab to apply power. Always run first in open
loop, and preferably with no or light load. Apply first a small command (100-200) and verify
that the motor spins without noise or rumble while using low current. Run the motor in
the opposite direction and verify that for the same command value, it reaches the same
speed and draws the same current. If the motor runs smoothly and with symmetrical per-
formance, repeat the test with higher command value.
If the performance is different in the forward vs reverse direction, the zero reference may
be wrong. Run the setup again. Noise or rumble typically points to problems with the sen-
sor.