Problem with my Z axis

Hi Guy's I need some Help Please?

I'm having a problem with my Z Axis motor tuning . The settings are listed below. It goes in both directions when I use either of the Z+ or Z- tabs. Have any Ideas on what I'm doing wrong?

The wiring has been checked and double checked. I'm running the jog rate at 45% and it keeps going in one direction and then reverses the direction. If I run it at 100% it does nothing.



I listed the settings below

I'm using M542 drivers.
Motors

* Manufacturer Part Number: 23HS45-4204S
* Motor Type: Bipolar Stepper
* Step Angle: 1.8 deg.
* Holding Torque: 3.0Nm(425oz.in)
* Rated Current/phase: 4.2A
* Phase Resistance: 0.9ohms
* Inductance: 3.8mH+/-20%(1KHz)
BOB http://www.ebay.com/itm/Upgrade-Usb-...item2a4eceaf9b

You don't say what the voltage of the power supply is that feeds the drives?

Sorry about that. They are 36Volt

It could be your Keyboard.!! . . . .Try another. I've had this type of thing happen before and it's been the keyboard related.

If that doesn't work and your 100% sure your wiring is ok then Re-install Mach3. Also if this is a Dodgy copy of Mach3 that came with the BOB then dump it and download the latest Lockdown version from Artsoft site.

So I was using a Logitech wireless keyboard and just switched it to a direct USB plug in keyboard and it works fine.

Thanks for the help Guys.

Mike