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Okuma OSP Controller
Tool Changer · Intermediate
Okuma OSP Alarm A 8512 - Turret position uncertain
On an H1-turret specification machine the turret is not positioned anywhere in the 0 to 359.999 degree range, or it is outside the stroke end limit, so the control does not know a valid turret position. Indexing is blocked until the turret position is made certain.
8512
Okuma OSP Alarm A 8512 - Turret position uncertain
Turret position uncertain
On an H1-turret specification machine the turret is not positioned anywhere in the 0 to 359.999 degree range, or it is outside the stroke end limit, so the control does not know a valid turret position. Indexing is blocked until the turret position is made certain.
Common Causes
- Turret sensor offset value not set correctly
- Turret rotated outside the stroke end limit
- Turret position sensor fault or misadjustment
- Loss of turret reference after power loss or mechanical work
Troubleshooting Steps
- 1Check the current turret position display; if the turret sits outside the stroke end limit, manually rotate or jog it back within the allowed range first.
- 2Verify the turret sensor offset value; the manual directs setting the turret sensor offset correctly so the sensed position matches the actual turret station.
- 3Inspect the turret position sensor and its wiring for damage or loose connections that could give a false position reading.
- 4Set the stroke end limit values correctly as the manual directs, then re-home or index the turret through a full station cycle and confirm each station reads a valid position between 0 and 359.999 degrees.
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