axismd.ai
Okuma OSP Controller
Servo/Axis · Intermediate
Okuma OSP Alarm A 1694 - MCS Linear scale 3 initialization failure
The MCS failed in initialization of linear scale 3 (HEIDENHAIN) for the axis named in the object field. The scale did not complete its power-up handshake, so position feedback from that scale is unavailable.
1694
Okuma OSP Alarm A 1694 - MCS Linear scale 3 initialization failure
MCS Linear scale 3 initialization failure
The MCS failed in initialization of linear scale 3 (HEIDENHAIN) for the axis named in the object field. The scale did not complete its power-up handshake, so position feedback from that scale is unavailable.
Common Causes
- Failed linear scale 3 (HEIDENHAIN) unit
- Scale cable or connector problem between the scale and the MCS
- Scale reader head contamination or damage preventing initialization
Troubleshooting Steps
- 1Note which axis is named in the object field, then power down and lock out before touching scale wiring.
- 2Inspect the connector at linear scale 3 (HEIDENHAIN) for that axis: reseat it, check for bent pins, coolant ingress, or cable damage.
- 3Clean the scale tape and reader head with the approved cleaner; contamination can prevent the initialization handshake.
- 4Power up and watch whether initialization completes; if the same axis fails again with good cabling and a clean scale, the corrective action is to change linear scale 3 (HEIDENHAIN) as the manual directs.
- 5If the alarm follows a cable swap to another axis, suspect the MCS input channel rather than the scale.
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