Siemens SINUMERIK 808D Parameter Manual page 292

Machine data
3.4 Axis-specific machine data
35220 ACCEL_REDUCTION_SPEED_POINT
- Speed for reduced acceleration
-
- -
Description:
This machine data defines the threshold speed/velocity for spindles/positioning/path
axes from which the acceleration reduction is to start. The reference is the defined
maximum speed/velocity. The starting point is a percentage of the maximum values.
The maximum speed for spindles is determined as the lowest value from machine data
MD35100 $MA_SPIND_VELO_LIMIT, MD35130 $MA_GEAR_STEP_MAX_VELO_LIMIT and, with position
control, MD35135 $MA_GEAR_STEP_PC_MAX_VELO_LIMIT.
Example: MD35220 $MA_ACCEL_REDUCTION_SPEED_POINT = 0.7, the maximum speed is 3000 rpm.
Acceleration reduction starts at v_on = 2100 rpm, i.e. the maximum acceleration
capacity is utilized in the speed range 0...2099.99 rpm. Reduced acceleration is used
from 2100 rpm to the maximum speed.
Related to:
MD32000 $MA_MAX_AX_VELO (maximum axis velocity)
MD35100 $MA_SPIND_VELO_LIMIT (maximum spindle speed)
MD35130 $MA_GEAR_STEP_MAX_VELO_LIMIT (maximum gear stage speed)
MD35135 $MA_GEAR_STEP_PC_MAX_VELO_LIMIT (maximum gear stage speed with position
control)
MD35230 $MA_ACCEL_REDUCTION_FACTOR (reduced acceleration)
35230 ACCEL_REDUCTION_FACTOR
- Reduced acceleration
CTEQ
- -
Description:
The machine data contains the factor by which the acceleration of the spindle/
positioning/path axes is reduced with reference to the maximum speed/velocity. The
acceleration is reduced by this factor between the threshold speed/velocity defined in
MD35220 $MA_ACCEL_REDUCTION_SPEED_POINT and the maximum speed/velocity.
Example:
a= 10 rev/s², v_on = 2100 rpm, MD35230 $MA_ACCEL_REDUCTION_FACTOR = 0.3.
Acceleration and deceleration take place within the speed range 0...2099.99 rpm with
an acceleration of 10 rev/s². From a speed of 2100 rpm up to the maximum speed, the
acceleration is reduced from 10 rev/s² to 7 rev/s².
MD irrelevant to:
Errors that lead to rapid stop.
Related to:
MD32300 $MA_MAX_AX_ACCEL (axis acceleration)
MD35200 $MA_GEAR_STEP_SPEEDCTRL_ACCEL
(acceleration in speed control mode)
MD35210 $MA_GEAR_STEP_POSCTRL_ACCEL
(acceleration in position control mode)
MD35242 $MA_ACCEL_REDUCTION_SPEED_POINT
(speed for reduced acceleration)
35240 ACCEL_TYPE_DRIVE
- Acceleration curve DRIVE for axes ON/OFF
CTEQ
- -
292
1.0 0.0
0.0 0.0
FALSE 0
A06, A04 S1, S3, B2
DOUBLE Reset
1.0 1/1
A06, A04 S1, S3, B2
DOUBLE Reset
0.95 1/1
A04 B1, B2
BOOLEAN Reset
- 1/1
M
M
M
Parameter Manual
List Manual, 01/2017