Extruder Stepper motor doesnt work.

[Pillar]

Im Having an issue with the extruder motor. My 3d printer is GEEETech Prusa I3 Pro B ,with GT2560 Board. Everything is working perfectlly but the extruder motor doesnt run at all in both directions.I did some checks. First: I unplugged the Extruder motor plug and i put it on the X Port. The extruder motor worked after that
in both directions by using manually the LCD manual control of X Axis. That means the extruder motor works. Second check: I swapped the v9 boards of X And Extruder port.The extruder motor works again. That means the V9 also is okay. Third: I plugged the extruder motor and the V9 ofc to the E1 Port. Nothing happened after that. Finally my issue is: Extruder motor is okay,V9 is also okay but both of E0 And E1 Ports wont run the extruder motor. Any suggestion will be appreciated. Thanks in advance.

[zhangxueyou]

Is the "v9" you called motor driver?

[Pillar]

Yes it was my mistacke , i meant the A4988 Motor driver. I did all the procedure to print and the extruder motor doesnt work. I think something is wrong with the configuration in marlin.

[zhangxueyou]

Ofcourse the extruder can not run if it is connected to E1 slot because of firmware, only extruder 0 slot is activated.
1. Can you get the AC voltage between GND and any pin of extruder 0 slot when you are moving extruder?
2. Is the power supply fine? Can you get 2 groups of 12V DC voltage?

[Pillar]

I had a second new power supply, with exactlly the same specifications 12V, 15A And 180Watt.I connected everything to the power supply and the problem still remains, i cant the E0 Port.

[Pillar]

Yes, i measured the DC output in 2 groups and the power is 12,35V

[zhangxueyou]

The PSU is fine.
Have you tested the output voltage of extruder motor slot? Can you get a changing AC voltage when you are moving the extruder (actually it's not moving, I mean when you give the command)?

how to test motor ouput voltage.png (633.52 KiB) Viewed 15204 times

[Pillar]

Yes i will do it and i will post the measurements but i would like if its possible to send the preconfigured marlin for my prusa i3 pro b with GT2560Board to make the last try to reupload everything one more time.

My email is pillar201@hotmail.com Thanks in advance.

[Pillar]

I did the check with extruder temp to 200C and i didnt notice any change in AC Volt, when i was giving the command via the display to the extruder motor. The indication remains the same in all pins, Blue-Red-Green-Black. After that, I swaped the A4988 Board from X Axis to the extruder. I did the same check and again, i didnt notice any change in my multimeter. The same results.

[Pillar]

I forgot to post the measurement in my previous message, It was 0 Volt AC Between GND and Red-Blue-Green and Black pins.