Programmed Run-In And Run-Out Path For G33, G34 And G35 (Dits, Dite) - Siemens SINUMERIK 840D Function Manual

V1: Feedrates
5.2 Path feedrate F
5.2.3.4

Programmed run-in and run-out path for G33, G34 and G35 (DITS, DITE)

The run-in and run-out path of the thread can be specified in the part program with the DITS
and DITE addresses.
The thread axis is accelerated or braked along the specified path.
①
Short run-in path
Due to the collar on the thread runin, little room is left for the tool start ramp.
This must therefore be specified shorter via DITS.
Short run-out path
Because of the shoulder at the thread run-out, there is not much room for the tool braking ramp,
introducing a risk of collision between the workpiece and the tool cutting edge. The deceleration
ramp can be specified shorter using DITE. Due to the inertia of the mechanical system,
however, a collision can still occur.
Remedy: Program a shorter thread, reduce the spindle speed.
Note
DITE acts at the end of the thread as a rounding clearance. This achieves a smooth change in
the axis motion.
Effects
The programmed run-in and run-out path only increases the rate of acceleration on the path. If
one of the two paths is set larger than the thread axis needs with active acceleration, the thread
axis is accelerated or decelerated with maximum acceleration.
Syntax
DITS=<Value> DITE=<Value>
140
Run-in/run-out path, depending on the machining direction
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA