Siemens alarm 25080: Axis %1 positioning monitoring

What it means

For blocks with exact stop, the axis must settle inside the exact-stop fine window (MD 36010 STOP_LIMIT_FINE) within the positioning time (MD 36020 POSITIONING_TIME); coarse tolerance is MD 36000 STOP_LIMIT_COARSE. When the following error has not decayed enough by then, the NCK stops the axis and switches to follow-up mode.

Likely causes

• position loop gain (Kv, MD 32200) too low or detuned after mechanics work
• increased friction, backlash or worn ball screw changing settling behavior
• exact stop windows too narrow or positioning time too short for the axis dynamics
• brake dragging or counterbalance fault loading the servo during stopping
• speed controller instability after drive component exchange