Geeetech

How do you set the proper current for the a4988 driver board. I know there is a variable resistor for adjusting the current on the board. Do you want to unplug the stepper motor connector on the GT2560 V3.0 mother board prior to setting the current level, so you won't damage your stepper motor? I also, want to know how you determine the proper orientation of the driver assembly to plug into the mother board. I know that the 2560 board has blue and black connectors and the a4988 drivers that came with the original board are blue and black, and gives to a method of know how to plug them in. The drives I have ordered the plugs on the driver are both black. Which pin is Vcc and which pin is ground on the GT2560 mother board? I am sorry I have so many questions and so little knowledge about this subject. As always thanks. Hopsing

Hi, Can you provide pictures of your driver board
Driver board replacement should be performed when the printer is off
The motherboard and driver board insertion colors should be consistent.

Ok here is a closeup shot of both sides of the driver board in my GT2560 v3.0 mother board. William do you line up the blue pins to the blue pins on the motherboard when plugging them in? Tht is the logical thing to do.

yes, match it.

What should the voltage be set to on the variable resistor?

Hi, you can refer to this: Increase voltage clockwise
Decrease voltage counterclockwise.