Okuma 4100/4809 alarm: ATC error / passage time exceeded

The Okuma tool changer does not complete a stage within time. It is an alarm from the Tool change / ATC area, and in the catalog it is listed as “ATC error / passage time exceeded”. On the machine you notice it like this: ATC parado, Arm or door out of position, Recovery required.

On the shop floor it almost always comes from one of these causes: Sensor ATC, Pneumatic/hydraulic pressure, Poorly seated tool, Secuencia interrumpida. Rule out the most likely one on your machine first, before touching parameters or swapping anything.

Use the Okuma ATC recovery procedure. Resetting without fixing the cause first only hides the problem: Okuma 4100/4809 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: Do not put your hands in the ATC, Register position, Check pressure and visible sensors. That alone will tell you whether it is the program or whether you need to raise a maintenance job.

With Okuma 4100/4809 active, avoid this: Do not bypass safety devices, Do not manipulate energized electrical cabinet, Do not continue producing if the alarm reappears. Skipping any of these points is what turns a minor stop into an expensive breakdown.

If ATC is in mid-cycle or there is a trapped tool. 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. Guidance reference. Always confirm the full text in the exact machine/control manual.