Denford Triac ATC Problem

[m_c]

It sounds like a problem with the controller ladder, rather than a sensor problem, given it indexes correctly with the buttons.

These drawings? http://www.denfordata.com/bb/viewtopic.php?f=15&t=2651
There are quite a few Fanuc downloads in the download board on the denford forum.

[jamesgates1000]

Thanks for that, looked all over that forum but somehiw missed the downloads section. Got the fanuc om service manual which has electrical diagrams and ladder diagram. You are right when using the manual index buttons the sensor flashes twice on the ladder but when calling an m6 the sensor doesnt register the rotations. Any idea why this might have changed suddenly?