Geeetech

Thanks for your help. I tried to extrude without the filament and the wheel was still moving back and forth, which made me think it wasn't the tension that was the problem (although I tried a shim, just to check!). It turned out to be a problem with the 4988 stepper driver. Fortunately, when I ...

I recently received a new control board and swapped the A4988 stepper drivers from the old control board to the new one. However, when I attempted to print, a few things weren’t working. It seems that one of the A4988s stopped working when I swapped them over and I had to buy a new one for the Y ...

Thanks for the reply. I swapped a couple of the 4988 stepper drivers to test things and discovered that was my problem. Perhaps one of them was damaged when I transferred them from the old control board to the new one. So I ordered a set of 4988s and replaced the faulty one. Now all the axis work ...

Hmmm. A brief update. Now the X and Z axis work, but still not the Y.
I unplugged and then reseated the 4988 for the Z-axis and now the Z-axis works, but reseating the Y-axis has done nothing. The Y-axis has 0.82V so I tried to turn up the voltage for the Y-axis from 0.82V to 0.91V. Still nothing ...

I recently received a new GT2560 A+ board to replace a faulty old one. The old one did not power the fans.
This new board powers the fans, but now only the X axis works (both directions)
To test the motors, I switched the X and Y axis motor cables and now the Y-axis moves forward but not backwards ...

Hi there. I have the i3 Pro W with a GT2560 A+ board. Which firmware do I need?
The helpful guide for firmware (http://www.geeetech.com/forum/viewtopic.php?f=20&t=17046) lists the Pro W but it doesn't specify an option for the A+ board, except with the 3D touch. I do have the A+ but I don't have the ...

Thank you both. This is all incredibly helpful. I’m determined not to lose hope before I’ve started!
Aside from visually inspecting for any obvious short circuits and burn outs on one of the 4988, are there any tests I can conduct to determine if one of them is faulty?
Thanks again for your help and ...

Thanks for your help. It is appreciated.
Sorry for my ignorance but which part is the stabiliser that you refer to?
And to clarify, is this correct:
1) Replace blown fuse (littlefuse/nano fuse)
2) Desolder and remove the stabilizer
3) Use a jumper cap on JP2

If this is correct, I just need to ...

I will have to try find a replacement fuse. Your schematics are helpful. Thank you. I notice that your schematics show a 5a and 15a fuse. Mine are 10a and 15a so I’m assuming there is some variation. I need to replace the 15a.

I’m no expert at this thing. Could you suggest any reason why the three ...

Thanks for the swift reply.

My multimeter is a bit old so it's an analogue reading, but looks like a solid 12V from the power supply (I also checked at the end of the power cable to the control board, just to make sure the cable wasn't faulty).
The board is the GT2560 Rev A+ and I think has the ...