Siemens SINUMERIK 840D Function Manual

Also see for SINUMERIK 840D sl: Manual Function manual Function manual Function manual Function manual

Second gear stage data setThe automatic gear stage change M40 can be extended by a second configurable gear stagedata set.The second gear stage data set is used exclusively in connection with tapping withoutcompensation chuck (G331, G332) so that an effective adjustment of spindle speed and motortorque can be achieved.The activation is undertaken by setting the following bit for the master spindle:MD35010 $MA_GEAR_STEP_CHANGE_ENABLE, Bit 5 = 1The number of used gear stages of the second gear stage data set is defined with the machinedata:MD35092 $MA_NUM_GEAR_STEPS2The second gear stage block data set is deactivated if:MD35092 $MA_NUM_GEAR_STEPS2 = 0 (basic setting)The first gear stage data set then selects the gear stage when M40 is active.NoteThe number of gear stages in the second data set can vary from the first. If no appropriate gearstage is found for a programmed speed for M40, then no gear stage change is carried out(exceptions, see "M40: Automatic gear stage selection for speeds outside the configuredswitching thresholds (Page 835)").For more information about a typical program sequence in thread cutting without compensatingchuck G331/G332 see:Further information:Programming Manual - Fundamentals; Motion CommandsThe gear stages 1 to 5 of the second gear stage data set can be parameterized via the followingmachine data:Machine data MeaningMD35112 $MA_GEAR_STEP_MAX_VELO2[n] Maximum speed for automatic gear stagechangeMD35122 $MA_GEAR_STEP_MIN_VELO2[n] Minimum speed for automatic gear stagechangeMD35212 $MA_GEAR_STEP_POSCTRL_ACCEL2[n] Acceleration in position control modeNoteThe number of servo parameter sets concerning the mechanical factors remain unchanged.Furthermore, five mechanical gear stages for the spindle and one for the axis operation can beconfigured.S1: Spindles18.4 Configurable gear adaptationsAxes and spindles780 Function Manual, 06/2019, A5E47437747B AA