Siemens SINUMERIK 840D sl Function Manual

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FunctionIf the function is activated, a predefined gear step is loaded automatically during transition toaxis mode.The gear step change is integrated into the M70 process and occurs after spindle decelerationand before the loading of the servo parameter set with index 0 (noteMD35590 $MA_PARAMSET_CHANGE_ENABLE!).The typical dialog between NC and PLC which occurs during gear step changes is executedin a similar way to programmed gear step changes (M41 ... M45) performed.PreconditionsGear step changes during transition to axis mode require general enabling of the gear stepchange via the machine data:MD35010 $MA_GEAR_STEP_CHANGE_ENABLE (assign parameters to the gear stepchange).MD35090 $MA_NUM_GEAR_STEPS (number of gear steps set up)Activation/deactivationThe function is activated/deactivated via the machine data:MD35014 $MA_GEAR_STEP_USED_IN_AXISMODE (gear step for axis mode in M70)Value Meaning0 No implicit gear step change occurs in M70. The current gear step is retained (defaultsetting!).1 ... 5 A gear stage change to gear stage 1 ... 5 occurs during the processing of M70.Supplementary conditionsGear step change at fixed position (MD35010 $MA_GEAR_STEP_CHANGE_ENABLE = 2)The "gear step change at fixed position" function is supported. The sequence in M70 is thenextended by the time it takes to position the spindle. The position is approached at the currentgear step.Transition to axis mode without programming M70The control system detects the transition to axis mode automatically from the programsequence (see "Implicit transition to axis mode (Page 1224)") and generates the requisite M70sequence, including the gear step change, within the control system.Transition to axis mode with FC 18Implicit gear step change is not supported in transition to axis mode with the FC 18 ("Startaxis"). This requires the right gear step to be engaged by the PLC application before switchingto axis mode. The gear step change is also possible with the FC 18 ("Start gear step change").Change from axis mode to spindle modeWhen changing from axis mode to spindle mode, the gear step loaded with M70 remainsactivated. The gear stage which is activated in spindle mode prior to M70 is not automaticallyS1: Spindles16.4 Configurable gear adaptationBasic Functions1264 Function Manual, 01/2015, 6FC5397-0BP40-5BA2