Heidenhain Rounding radius too large alarm: Corner rounding radius too large

The TNC cannot insert the rounding arc (RND) because it does not fit between the contour elements. It is an alarm from the Program area, and in the catalog it is listed as “Corner rounding radius too large”. On the machine you notice it like this: Falla en RND, Bloque concreto rechazado, Appears after editing the outline.

On the shop floor it almost always comes from one of these causes: Rounding larger than the segment, Contour elements too short, Misconfigured post. Rule out the most likely one on your machine first, before touching parameters or swapping anything.

Reset tras corregir RND. Resetting without fixing the cause first only hides the problem: Heidenhain Rounding radius too large 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: Reducir RND, Check contour geometry, Simulate after correcting. That alone will tell you whether it is the program or whether you need to raise a maintenance job.

With Heidenhain Rounding radius too large active, avoid this: Do not machine a contour whose RND was not computed, Do not delete blocks you do not understand. Skipping any of these points is what turns a minor stop into an expensive breakdown.

Normally requires no maintenance. 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.