You can indeed measure the output voltage of a motor controller without a motor, using an inexpensive multimeter. I'd recommend putting a 1500 ohm resistive load across the output. Use the DC setting of the multimeter. This was done using a Velleman DVM850BL:
Quote:
Originally Posted by Ether
FWIW, here's a graphic of the 884 driving a 1500 ohm resistive load. You can see how linear it is. The non-linearity (when connected to a motor) comes from the interaction of the (slow) frequency the 884's output with the motor's inductance. |