201's, only two axes working

[bebson]

I manage to jog all axes, but only two at a time. I can jog x and y, but not z. Then I reboot my computer, shut down driver power supply, and I can jog y and z, but not x.
I have COMMON over usb port, 60V 15A PS, 3 1200 oz/in steppers. Controller is athlon xp 1900+ with 512 MB RAM.

I double checked ports and pins, and try warious combinations on output pins.
All three geckos are heatsinked on one big heatsink, and auto current reduction is enabled...
I dont use breakout board, pinned them directly from lpt port.

I did not connect ground from to any pin, could that couse the problem? Is usb 200ma to low for three geckos? What is the minimum miliamper value to run a gecko?

Any help is appreciated...

[ger21]

If you're not getting a full 5V from the parallel port, then the G201's won't work well. They usually need a breakout board to supply them with sufficient power.

[bebson]

Thank you, that might be a problem, I measured 4.80 in iddle, little less when they are working.
I will try to put 5V on them tomorrow morning. I belive i can take 5V from molex. ?!