Z axis problem

[jdshoe2009]

Hi,

Hobby series, just did a system restore no help.  Z axis gets lost in the middle of job and continues to run the path a few inches above work.
Also when i try to zero manually, z-axis goes down but then reverses and the down button then makes it go up.  Totally confused.  if i continue
to go up, the soft limit is gone and motor grinds.

joe

[Axiom Tool Group]

If I understand correctly…when you move the Z axis down, it will move up even though the controller is telling it to go down?

If that is the case, then there is a loose/poor connection which is effecting the directional signal to the Z axis stepper motor.

First, inspect the cable connections between the handheld and the white control box. These connections need to be square and perfectly seated…if loose or not seated properly the signals between the pins may become crossed.

*this cable can be flipped, in which case different wires inside the cable will be used….this may help IF there are any damaged wires within the cable*

In addition, the connection at the back off the machine, where the control box plugs into the base of the machine itself would be the same.


In some rare cases, with Z axis reversal like this…we have encountered broken wires or poor connection where the wire harness plugs into the Z axis stepper motor itself. Which on your machine, there is a small black cover that hides this.

Please remove that small black metal cover at the very top of your Z axis to investigate the connection plugin into the stepper motor itself.

Be sure to verify that each of the 4- wires here are solid and not broken or poorly connected…and that the plug is firmly seated.


And finally, if none of these above items clear up the directional issue not Z axis…you may simply have a loosened connection for the Z axis on the RichAuto DSP board. To look a this set of connections…you will need to open the white control box.

Inside that box, you simply need to look at the large black DSP board. Easily identified since the handheld controller plugs directly into it from the front of the box.

This board is separated into the different axes…each one is a separate set of connection made with a green terminal plug.

Locate the small green block labeled Z axis on that board. This can be wiggled and pulled free.

Once that green terminal has been pulled free from the board, you can loosen the set screw for each of the wires and make sure that they are properly clamped down on the wires.

*In some cases, the original install may have been clamped on the insulation….and then over time the wire has moved a bit and is not longer getting proper signal.*


We hope this information its helpful. Please let us know if you have any additonal questions.

Thank you,