Heidenhain 62 alarm: Incorrect reference mark

During reference, the control detects incorrect separation of ruler/encoder marks. It is an alarm from the Encoder / measurement area, and in the catalog it is listed as “Incorrect reference mark”. On the machine you notice it like this: The axis does not home, Error during reference search, It may indicate an abnormal rule signal.

On the shop floor it almost always comes from one of these causes: Regla/encoder sucio, Incorrect scale parameter, Cabezal lector/cable, mechanical damage. Rule out the most likely one on your machine first, before touching parameters or swapping anything.

Do not operate until reliable homing is restored. Resetting without fixing the cause first only hides the problem: Heidenhain 62 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: Identify the axis, Check if there was intervention in order, Do not repeat homing if there is noise or a knock. That alone will tell you whether it is the program or whether you need to raise a maintenance job.

With Heidenhain 62 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.

Always, if it does not home correctly. 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.