Code 25040: Axis %1 standstill monitoring

Parameters: %1 = Axis name, spindle number Definitions: The NC monitors to ensure that the position is held at zero speed. Monitoring is started after a time that can be set for a specific axis in the MD36040 $MA_STANDSTILL_DELAY_TIME after interpolation has ended. A constant check is made to determi ne whether the axis remains within the tolerance range given in MD36030 $MA_STANDSTILL_POS_TOL. The following cases are possible: 1. The NC/PLC interface signal DB31,... DBX2.1 (S ervo enable) is zero because the axis has jammed mechanically. Due to mechanical in fluences (e.g. high machining pres sure), the axis is pushed outside the permissible position tolerance. 2. With closed position control loop (without jammi ng) - NC/PLC interface signal DB31,... DBX2.1 (Servo enable) is "1" - the axis is pushed away from it s position by mechanical forces with a small gain in the position control loop. The alarm can be reprogrammed in the MD11412 $MN_ALARM_REACTION_CHAN_NOREADY (channel not ready). Reaction: Mode group not ready. The NC switches to follow-up mode. Channel not ready. NC Start disable in this channel. Interface signals are set. Alarm display. NC Stop on alarm. Channel not ready. Remedy: Please inform the authorized personnel/service department. - Check MD36040 $MA_STANDSTILL_DELAY_TIME and MD36030 $MA_STANDSTILL_POS_TOL; increase if necessary. The value must be greater than the machine data "Exact stop - coarse" (MD36000 $MA_STOP_LIMIT_COARSE). - Estimate machining forces and reduce if necessary by setting a lower feed or a higher rotational speed. - Increase clamping pressure. - Increase the gain in the position control l oop by improved optimization (Kv factor MD32200 $MA_POSCTRL_GAIN, SIMODRIVE611D drive). Program Continuation: Clear alarm with the RESET key in all channel s of this mode group. Restart part program.