Okuma SL-001 / 1302 alarm: Spindle not ready or drive fault

The spindle does not reach the ready state or the drive reports a fault condition. It is an alarm from the Spindle area, and in the catalog it is listed as “Spindle not ready or drive fault”. On the machine you notice it like this: The spindle does not start, Orientation or range change failure, May depend on pressure/interlock.

On the shop floor it almost always comes from one of these causes: Interlock de husillo, Low air/hydraulic pressure, Spindle drive, Encoder/orientation. Rule out the most likely one on your machine first, before touching parameters or swapping anything.

Reset once interlocks are restored and with the spindle stopped. Resetting without fixing the cause first only hides the problem: Okuma SL-001 / 1302 trips again and, in the meantime, you keep working with the machine in bad shape.

With the machine stopped and in a safe state, start with these checks: Review complete OSP message, Check pressure and interlocks, Note whether it happens when orienting or starting. That alone will tell you whether it is the program or whether you need to raise a maintenance job.

With Okuma SL-001 / 1302 active, avoid this: Do not start repeatedly while the fault is active, Do not work on an energised drive. Skipping any of these points is what turns a minor stop into an expensive breakdown.

If it does not reach ready after basic conditions or there is a drive failure. If you are not sure how far it goes, stop the machine and report it: a repeat alarm always works out cheaper than a crash.

It is critical: there is a real risk of damage to the machine, the tool or a person. Leave the machine stopped, do not keep resetting it to see if it goes away, and call maintenance before producing again. Okuma can separate alarm NC, PLC and drive; review all.