low stepper motor current ??

[thomascnc]

Hello from Greece.
I have the Hobbycnc 4axis pro and i realize that the maximum stepper motor current i can get is lower than 300 mv..
I check the part list and the parts that are installed in the board and it looks ok
I have a 36VDC 10amp power supply and a 305 oz-in steppers mottors.
How can i get higher current output??
Best ragards Thomas.

[BrianV]

Well, the board is able to deliver 3 amps into that stepper motor (and it gets those motors damn hot too!).

Tip 1: Setting the motor current: Stepper Motor Current Calculator
Tip 2: Checking voltages FAQ
Tip 3: Is it a Rev 1 or Rev 2 board. It is possible the motor low current enable is somehow turned on. The mechanism is different between Rev 1 and Rev 2.
PRO 1: Idle Current Reduction must be disabled PRO board only – install J4 on all the 8-pin headers when setting the voltage.
PRO 2: Take a look at the Pin 1 enable signal. Did you jumper it? Is your system sending a ‘disable’ signal?

Let me know some more detail.
BrianV

[Author]

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