What causes Okuma OSP alarm 8612?

APC clamp/unclamp commanded while spindle still rotating. APC clamp/unclamp commanded while C-axis connected. Program sequence issues the APC command before the spindle stop is confirmed.

How do I fix Okuma OSP alarm 8612?

1. Read the code number shown with the alarm: code 1 = APC clamp/unclamp command was issued while the spindle was rotating.; code 2 = APC clamp/unclamp command was issued while the C-axis is connected. 2. Read the code on the alarm screen: code 1 means the APC clamp/unclamp command was issued while the spindle was in rotation; code 2 means it was issued while the C-axis is connected. 3. For code 1, edit the program or sequence so the spindle is fully stopped (M05 and spindle stop confirmed) before the APC clamp/unclamp command is executed. 4. For code 2, release the C-axis connection before issuing the APC clamp/unclamp command so the pallet mechanism is not moved with the C-axis engaged. 5. Re-run the pallet change sequence in single block and confirm each precondition (spindle stopped, C-axis released) is met before the clamp/unclamp step.

Okuma OSP codes

axismd.ai

Okuma OSP Controller

Safety · Intermediate

Alarm 8612

Okuma OSP Alarm A 8612 - APC interlock

An automatic pallet changer (APC) clamp or unclamp command was issued under an illegal condition: either while the spindle was rotating or while the C-axis was connected. The interlock prevents pallet motion that would be dangerous with the spindle live.

Okuma OSPSafetyIntermediate

8612

Okuma OSP Alarm A 8612 - APC interlock

APC interlock

Common Causes

APC clamp/unclamp commanded while spindle still rotating
APC clamp/unclamp commanded while C-axis connected
Program sequence issues the APC command before the spindle stop is confirmed

Troubleshooting Steps

1Read the code number shown with the alarm: code 1 = APC clamp/unclamp command was issued while the spindle was rotating.; code 2 = APC clamp/unclamp command was issued while the C-axis is connected.
2Read the code on the alarm screen: code 1 means the APC clamp/unclamp command was issued while the spindle was in rotation; code 2 means it was issued while the C-axis is connected.
3For code 1, edit the program or sequence so the spindle is fully stopped (M05 and spindle stop confirmed) before the APC clamp/unclamp command is executed.
4For code 2, release the C-axis connection before issuing the APC clamp/unclamp command so the pallet mechanism is not moved with the C-axis engaged.
5Re-run the pallet change sequence in single block and confirm each precondition (spindle stopped, C-axis released) is met before the clamp/unclamp step.

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