Knee-Shaped Acceleration Characteristic; Activation - Siemens SINUMERIK 840D Function Manual

12.3.4

Knee-shaped acceleration characteristic

12.3.4.1

Activation

The example illustrates how the knee-shaped acceleration characteristic curve is activated on
the basis of the machine data and a part program extract.
Machine data
Machine data
MD35220 $MA_ACCEL_REDUCTION_SPEED_POINT[
X]
MD35230 $MA_ACCEL_REDUCTION_FACTOR[X]
MD35242 $MA_ACCEL_REDUCTION_TYPE[X]
MD35240 $MA_ACCEL_TYPE_DRIVE[X]
MD35220
$MA_ACCEL_REDUCTION_SPEED_POINT[Y]
MD35230 $MA_ACCEL_REDUCTION_FACTOR[Y]
MD35242 $MA_ACCEL_REDUCTION_TYPE[Y]
MD35240 $MA_ACCEL_TYPE_DRIVE[Y]
MD35220
$MA_ACCEL_REDUCTION_SPEED_POINT[Z]
MD35230 $MA_ACCEL_REDUCTION_FACTOR[Z]
MD35242 $MA_ACCEL_REDUCTION_TYPE[Z]
MD35240 $MA_ACCEL_TYPE_DRIVE[Z]
Activation by entering as channel-specific initial setting:
MC_GCODE_RESET_VALUE[20] = 3 (DRIVE)
Part program extract
Program code
N10 G1 X100 Y50 Z50 F700
N15 Z20
N20 BRISK
N25 G1 X120 Y70
N30 Z100
N35 POS[X] = 200 FA[X] = 500
N40 BRISKA(Z)
N40 POS[Z] = 50 FA[Z] = 200
N45 DRIVEA(Z)
N50 POS[Z] = 100
N55 BRISKA(X)
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
B2: Acceleration and jerk
Value
= 0.4
= 0.85
= 2
= TRUE
= 0.0
= 0.6
= 1
= TRUE
= 0.6
= 0.4
= 0
= FALSE
Comment
; Path motion (X,Y, Z) with DRIVE
; Path motion (Z) with DRIVE
; Switchover to BRISK
; Path motion (Y, Z) with substitute
characteristic curve
; Path motion (Z) with BRISK
; Positioning motion (X) with DRIVEA
; Activate BRISKA for Z
; Positioning motion (Z) with BRISKA
; Activate DRIVEA for Z
; Positioning motion (Z) with DRIVE
; results in error message
12.3 Examples
395