Heidenhain Touch point inaccessible alarm: Probing point not reachable

After starting a probing cycle, the point is not reached within the range defined by MP6130. It is an alarm from the Encoder / measurement area, and in the catalog it is listed as “Probing point not reachable”. On the machine you notice it like this: The probing cycle is cancelled, The stylus does not contact the surface, Distancia recorrida supera MP6130.

On the shop floor it almost always comes from one of these causes: Badly located piece, Zero wrong piece, MP6130 too small, Stylus not calibrated. Rule out the most likely one on your machine first, before touching parameters or swapping anything.

Reset after correcting pre-position or zero. Resetting without fixing the cause first only hides the problem: Heidenhain Touch point inaccessible 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: Verify real position of the piece, Confirm zero piece, Pre-position closer to the surface. That alone will tell you whether it is the program or whether you need to raise a maintenance job.

With Heidenhain Touch point inaccessible active, avoid this: Do not increase MP6130 without understanding the impact, Do not scan over an empty area. Skipping any of these points is what turns a minor stop into an expensive breakdown.

If MP6130 was modified without documentation or the probe does not calibrate. 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 a stop alarm: the cycle will not continue until you fix the cause. It does not always mean serious damage, but it leaves the machine where it is and you have to check it before running again. Guidance reference. Always confirm the full text in the exact machine/control manual.