Hello,
I have a 1989 CompuMill bedmill with a Dynapath 20 control. This is a fairly new machine to me - have used is successfully for a short while til just the other day. By mistake, I somehow let the Z go upwards and hit the overtravel switch which threw the machine into E stop. After awhile, I found the reset button in the control cabinet. I pushed that and lowered the Z at the same time and the machine reset itself.
Since then, however, I can't get the machine to Z home. It will physically move upwards til it hits the switch, but the machine does not recognize its home position.......gives me an alarm and says "Z not referenced" I took the front panel off. I lower the z and then try to reference it - I then push the limit switch with my finger and the z travel stops. It should then think its home, correct? But when I let go, it continues to move upward until it hits the switch. I learned that the control only needs two things to recognize z home - the switch being pushed and then finding the nearest marker pulse....so it appears it isn't doing the latter.
I thought the switch might be bad. I went into diagnostics and found the I/0 - it switches between 0 and 1 when I press the switch manually so that says the switch is good, correct? I checked to make sure the switch and the dog were still tight - thought they may have loosened over time and moved - both appear to be tight and in place.
Any thoughts on this?
Thanks in advance!
Shannon