[laoadam]

Hi,
The attached pictures shown a stepper motor driver of A3977 driver from an old mini CNC machine, which used 5 pins for the control.
Need help on the pinout of this board, for repair or replacement.
Thanks
Adam

https://www.cnczone.com/forums/attac...d=462546&stc=1https://www.cnczone.com/forums/attac...d=462548&stc=1

[Toinvd]

For the control connection.
The left pin ( closest to the center of the board of you first picture ) is the +5V connection for all three inputs
the next one is CLK or PULL ( active low )
the third one is DIR ( active low )
For the ENable ( active low ) I am not sure if it's connected to pin four or pin 5. It looks to me pin 5 You can check that with a ohm meter between the pin and the hole just above.