Just finished reworking my machine to use ball screws on the x axis. Y and Z stayed the same and worked fine prior.
Also hooked up x and y limit switches which were inactive before.
Now here is the problem.
Page up raises the Z. Release Page up and Push again....Z axis goes down. Wait about 3 seconds and press the page up and the z goes up.
Same thing happens on the Page down. If I wait in between key strokes for about 3 seconds each direction works fine.
I did not rewire the z on the rework and the router is not on.
What is really strange is that everything worked yesterday before hooking up the limit switches.
There was a similar post in 09 but there was no "answer" and I do not know how to bring that thread back to the top.
Thank you for any help or suggestions.
Art

OK...After checking everything in Mach and reloading the software, it performed exactly the same.
I traced all the wires and found 1 connection for the z-axis motor that was loose. I repaired it and ran it through its paces.......All is well with the world....SO FAR!!
Thank to all