Programmable Run-In And Run-Out Path For G33: Dits, Dite - Siemens sinumerik 808d Programming And Operating Manual

Axis velocity
With G33 threads, the velocity of the axes for the thread length is determined on the basis of
the spindle speed and the thread lead. The feedrate F is not relevant. It is, however, stored.
However, the maximum axis velocity (rapid traverse) defined in the machine data can not be
exceeded. This will result in an alarm.
Information
Important
● The spindle speed override switch should remain unchanged for thread machining.
● The feedrate override switch has no meaning in this block.
1.3.8

Programmable run-in and run-out path for G33: DITS, DITE

Functionality
The run-in and run-out path must also be traversed to the required thread with thread G33.
The starting and braking of the axis (both axes in case of a tapered thread) are performed in
these areas. This path depends on the thread lead, spindle speed, and the axis dynamics
(configuration).
If the available path for run-in or run-out is limited, it may be necessary to reduce the spindle
speed so that this path is sufficient.
In this case, the run-in and run-out paths can be specified separately in the program to
achieve favorable cutting values and short machining times or to simplify the handling of this
issue. If no values are specified, the values from the setting data (SD) apply. The
specifications in the program are written into SD42010: THREAD_RAMP_DISP[0] ... [1].
If this path is not sufficient for the traversing with the configured axis acceleration, the axis is
overloaded in terms of acceleration. Alarm 22280 ("Programmed run-in path too short") is
then issued for the thread run-in. The alarm is purely for information and has no effect on
part program execution.
The run-out path acts as a rounding clearance at the end of the thread. This achieves a
smooth change in the axis movement when retracting.
Programming
DITS=...
DITE=...
Values for DITS and DITE or SD42010: THREAD_RAMP_DISP
-1 ... < 0:
0:
> 0:
Note: The value of SD42010 after reset / program start is -1.
Turning Part 2: Programming (Siemens instructions)
Programming and Operating Manual, 05/2012, 6FC5398-5DP10-0BA0
; Run-in path of thread for G33
; Run-out path of thread for G33
Starting/braking of the feed axis is carried out with the configured acceleration.
Jerk according to current BRISK/SOFT programming.
Abrupt starting/braking of the feedrate axis on thread cutting.
The run-in / run-out path of the thread is predefined for G33.
To avoid alarm 22280, the acceleration limits of the axis must be observed in
case of very small run-in and run-out paths.
Programming principles
1.3 Axis movements
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