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

18.4

Configurable gear adaptations

18.4.1

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>]
MD35310 $MA_SPIND_POSIT_DELAY_TIME[<n>]
MD35550 $MA_DRILL_VELO_LIMIT[<n>]
Type of gear stage change
The type of gear stage change is set in machine data:
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
S1: Spindles
18.4 Configurable gear adaptations
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
Positioning delay time
Maximum speed for tapping with‐
out compensating chuck
775