SLVUA41E
8
2.2 Quick guide to spin with open-loop PWM
Step 1:
Set these jumpers:
Step 2:
Connect the USB cable between the board and your computer, and run the GUI.
Step 3:
Wire the included motor to the terminal blocks:
Step 4:
Connect your power supply to the board VM and GND terminals. Set the supply to 24V with at
least 1A (higher current is better).
Step 5:
With the GUI loaded and no
symbols, set the PWM Duty Cycle to 40% and click ENABLE.
The motor should spin!
Next,
To change from counter-clockwise to clockwise, click DIR.
To change speed, use the duty cycle knob.
To apply sinusoidal commutation, first change MOD120 from 2048 to 3970, and then select
180° Sine Commutation. Note that when MOD120 = 3970, a 2.1x factor is applied to the input
duty cycle, so a 40% duty cycle input is treated like 84%.
To use no clock and command speed from a register, select “PWM from SPEED Register”.
Then the SPEED decimal value divided by 4095 is the input duty cycle.
