1711

Common Causes

• Program error: feedrate too large or depth of cut too large
• Meter relay setting value too small (trips at normal load)
• Detection time setting too small (trips on brief load spikes)
• Mechanical binding on the ZA axis slide or ball screw

Troubleshooting Steps

1. 1Check the cutting program for the A-turret Z-axis: reduce an excessive feedrate or depth of cut that would overload the axis during machining.
2. 2Inspect the load detection meter relay setting for the ZA-axis; if the set trip value is too small, normal cutting load will trip it, so correct the setting.
3. 3Check the overload detection time setting; a value set too short will trip on harmless load spikes, so set an appropriate detection time.
4. 4Jog the ZA-axis with no cutting load and watch the load meter; high load at idle indicates mechanical binding, so inspect the slideway lubrication, ball screw and way covers.
5. 5After corrections, run a test cut with gradually increasing load while monitoring the load meter to confirm it stays below the trip level.