Configurable Gear Adaptation; Gear Stages For Spindles And Gear Change Change - Siemens SINUMERIK 840D sl Function Manual

S1: Spindles

16.4 Configurable gear adaptation

Once the tool has been retracted in the JOG mode, axes whose positions have been restored
are referenced. As a consequence, signals DB31, ... DBX71.4/5 ("Restored 1/2") are deleted
and signals DB31, ... DBX60.4/5 ("Referenced/synchronized 1/2") are set.
Note
If machine data MD20700 $MC_REFP_NC_START_LOCK is set to a value of "2", then an NC
start is also possible with "restored" axis positions (in the MDA mode or when overstoring).
16.4 Configurable gear adaptation
16.4.1

Gear stages for spindles and gear change change

Why do we need gear stages?
Gear stages are used on spindles to step down the speed of the motor in order to generate a
high torque at low spindle speeds or to step up in order to maintain a high speed.
No. of gear stages
Five gear stages can be configured for each spindle.
The number of used gear stages is defined in machine data:
MD35090 $MA_NUM_GEAR_STEPS
Parameterization of the gear stages
The gear stages 1 to 5 can be parameterized via the following machine data:
Machine data
MD35012 $MA_GEAR_STEP_CHANGE_POSITION[<n>]
MD35110 $MA_GEAR_STEP_MAX_VELO[<n>]
MD35120 $MA_GEAR_STEP_MIN_VELO[<n>]
MD35130 $MA_GEAR_STEP_MAX_VELO_LIMIT[<n>]
MD35135 $MA_GEAR_STEP_PC_MAX_VELO_LIMIT[<n>]
MD35140 $MA_GEAR_STEP_MIN_VELO_LIMIT[<n>]
MD35200 $MA_GEAR_STEP_SPEEDCTRL_ACCEL[<n>]
MD35210 $MA_GEAR_STEP_POSCTRL_ACCEL[<n>]
MD35300 $MA_SPIND_POSCTRL_VELO[<n>]
1232
Meaning
Gear stage change position
Maximum speed for automatic
gear stage change
Minimum speed for automatic
gear stage change
Maximum speed of gear stage
Maximum speed of gear stage in
position control
Minimum speed of gear stage
Acceleration in speed control
mode
Acceleration in position control
mode
Position control activation speed
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions