z-axis are not turning...

Hello fellow builders,

i have a problem and i cannot find the solutions.
Finally i finished my prusa mendell. When i wanted to test it i saw that all motors worked exept the z-axis. The meke a sound but won't turn. i disassembled them and tested them again without anything mounted to the z-axis motors. I started the sotware Pronterface where you have 3 different options to test the motor. 0,1-1 and 10. When select 0.1 both motors turn. when i select 1, both motors turn. But when i select 10 both motors make 1 click (1,8mm) and then stop and only make a noise. when i assemble the motors again and test it the same way....only the option 0.1 does somethimes something, others do nothing...they only make a noise.

These are my specs of the prusa.
1 x computer power supply that delivers 12V and 8A
1 x sanguinololu v3.1A

personaly i think that it is a power issue.....that the motors are nt getting enough power to get the job done, but a do not know for sure...and bfore i go out and buy me one i would like to have your opinion.

Hope my englisch is undrstandable enough for you to read the problem.

Many thanks

Iwan
The Netherlands.

In pronterface, have you played with lowering the Z speed and trying to move 10 mm again ?

Have you tried giving more current to the Z-motor by adjusting the trimpot of the pololu / stepstick / whatever it is you have as a motor driver ?

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Most of my technical comments should be correct, but is THIS one ?
Anyway, as a rule of thumb, always double check what people write.

I've found the pronterface motor move buttons to be unreliable - try using G Code instructions or repetier host

DeuxVis Wrote:
-------------------------------------------------------
> In pronterface, have you played with lowering the
> Z speed and trying to move 10 mm again ?
>
> Have you tried giving more current to the Z-motor
> by adjusting the trimpot of the pololu / stepstick
> / whatever it is you have as a motor driver ?

i feel like a real noob now....i indeed just needed to pitchup the stepperdriver a bit...it works fine now....

thanks for the tip...

topic can be closed now.