1752

Common Causes

• Connection ON/OFF confirmation limit switches defective or out of adjustment
• X-axis not positioned at its travel (stroke) limit before connection
• Tailstock spindle not fully retracted or retraction end LS not actuated
• Tailstock clamp mechanism not completing clamp within the allowed time

Troubleshooting Steps

1. 1Read the code number shown with the alarm: code None = Neither connection ON nor OFF signal for over 6 s, or an X/Z move was commanded in that state; code 3 = Both connection ON and OFF signals present together for over 6 s; code 4 = Connection ON signal appeared while X-axis was not at stroke end; code 5 = Connection ON signal appeared while the tailstock spindle was not at retraction end; code 6 = Tailstock clamp confirmation input dropped for over 1 s when AUTO or MDI mode was selected (auto clamp spec); code 7 = Tailstock was clamped while the W axis was moving; code 8 = Connection ON signal appeared with the workpiece pusher not at retract end; code 9 = Tailstock still not unclamped after the unclamp command was retried
2. 2Read the code. No code or code 3 (neither or both confirmation signals for over 6 s): check and adjust the position of the connection ON/OFF confirmation limit switches; replace a switch that does not change state when actuated by hand.
3. 3Code 4 or 12: move the X-axis fully up to its travel limit position before issuing the connection command.
4. 4Code 5 or 13: retract the tailstock spindle fully and verify the retraction end limit switch actuates; adjust or replace the LS if it does not.
5. 5Code 6: switch to MANUAL OPERATION mode and clamp the tailstock manually, then investigate why automatic clamping did not complete.
6. 6Code 7: do not clamp the tailstock while the W axis is moving; stop W-axis motion first. Code 8: retract the workpiece pusher to its retract end before connection.
7. 7Codes 9/10/11: retry the clamp/unclamp command; if it still does not settle, inspect the clamp/unclamp hydraulic circuit and confirmation switches.