First start Motor Issue With Sanguinololu

[@urel]

Hello,
I bought a Geeetech prusa I3 through eBay and I just tried to start it yesterday.
The heating bed is working, the nozzle too (tested with repetier)

But I'm pretty sure I ve a setting probleme with each motor.
The X and Y are working but in a jerky way, sometimes humming.
The Z axis is not mooving at all, Only humming.
It's like all motor are very weak.
I set all motor in full step to have the maximum power

Every axis can moove easily (motors disconnected)

I've got a sanguinololu with the GT2560.
What are the good setting to fill in the board through the panelololu like accélérations, step/mm etc...

I checked the voltage btw the grd and the small screw on each drivers. I gess the A4988. I adjusted it on 1V but nothing changed.
If it's a firmware issue, could you please send me a good one, with a step by step topic to burn it. I'm not really confortable with it.

Thanks a lot.

Aurélien

[Mark]

You can refer to the link here to check the motors:
http://www.geeetech.com/forum/viewtopic ... 13&t=17038
And refer to the link here to install the firmware:
http://www.geeetech.com/forum/viewtopic ... 20&t=16433
and if you want to download the firmware, find the one for your printer here:
http://www.geeetech.com/forum/viewtopic ... 10&t=17046
Also if you run into those common problems like wrong direction of motors, hotbed not heating up or something else, you can check it here first:
http://www.geeetech.com/forum/viewforum.php?f=13

[@urel]

Thank you for your answer,
After having X2 checked, voltages, and wiring, i found out my problem. I didn't plug any jumper under motor drivers. And because the firmware of the board is pre-set for 1/16 step it had eratic mouvements. Now it smoothly mooves and in the right way. Had to put some lubricant on Z screws to help motions.

No need to set a new firmware (for the moment.....)

Thanks