adamm
Cast Iron
- Joined
- Sep 19, 2008
- Location
- Kingston, ON
I have a Fanuc 6 controlled 2-axis lathe that has developed alarm 416. It appears to be a disconnection alarm. I've had this on both the X axis and Z axis (alarm 426) since I bought the lathe, and in previous times I replaced the encoder cables. The insulation was brittle and falling off, so it was an obvious problem. That cured the problem for 6+ months.
This time, when I swap the X and Z cables on the Fanuc mainboard, the alarm stays with the X-axis. If I disconnect the encoder for the Z axis, then I get both alarm 416 and 426, as well as 702 (overheat). If I plug either Z-axis or X-axis into the Z axis connector, I am back to just the 416 alarm.
So I'm pretty sure something is wrong with the mainboard. Does anyone know what tends to go wrong on the mainboard with the encoders? Is it like the RS232 and there is a easily replaceable chip that goes bad?
This time, when I swap the X and Z cables on the Fanuc mainboard, the alarm stays with the X-axis. If I disconnect the encoder for the Z axis, then I get both alarm 416 and 426, as well as 702 (overheat). If I plug either Z-axis or X-axis into the Z axis connector, I am back to just the 416 alarm.
So I'm pretty sure something is wrong with the mainboard. Does anyone know what tends to go wrong on the mainboard with the encoders? Is it like the RS232 and there is a easily replaceable chip that goes bad?