ATC TURRET FAILURE and ALARM
1996 VMC 15XT. Last night, the machines working along fine on a 30 tool change cycle job, all of a sudden the turret indexes past it’s unload position and alarms out. Lost its position and doesn’t know where to go. Shut her down and also reset the SETTO to no avail. Checked and replaced fuses as book says without results. It will index manually but is still lost as far as order. We’ve been fiddling with the connections and it work once then lost again. Now we are going to by pass that connection and hard wire it and try. Anyone have other ideas?
Thanks Steve
Taaa Daaa!!! Up and running...
...for now. :banana:
Thank you Alex for leading toward the wiring diagram and the Grayhill relays.:rolleyes: The appears to have been either corrosion at one of the two relays to the turret, or one of the relays is weak, or both of the above. Switched the relays with the spindle relays and the turret works. Cleaned the connections and reversed them back. Now after a hour plus worth of tool changes, all is working fine. I've ordered 3 relays just in case one is getting weak (16 bucks each is cheap insurance).
Steve
Tool changer fixed...It was the wire harness.
"The wire harness looks to be replace by someone and not OEM the color coding is wrong. Thus the low voltage and intermittent ATC alarm...
At this point we suspect the wire harness to the board may be bad and or the new relay may also be suspect. We right now are replacing the wire harness before we send the relay back for a new one."
Replacing the wire harness fixed the problem. We think they some how had the sig. and grn. transposed thus the low volts and putting us on the low voltage side at times of power drop from the main. (This is a guess, we are not electrical wizards). Anyway, the low voltage problem is now gone with the new harness.:banana:
Steve