Programmable Run-In And Run-Out Path For G33, G34 And G35 - Siemens SINUMERIK 840D sl Function Manual

V1: Feedrates
17.2 Path feedrate F
Thread cutting with ROT frame
With ROT frame and G33, G34, G35, alarm 10607 "Thread with frame not executable" is
activated if the rotation causes a change in the thread length and thus the pitch. Rotation
around the thread axis is permissible.
Alarm 10607 "Thread with frame not executable" can be suppressed by setting bit 12 in
machine data MD11410 $MN_SUPPRESS_ALARM_MASK, if the ROT instruction is used
intentionally in the application.
All other frames are accepted by the NC without alarm. Attention is drawn to the pitch-changing
effect of SCALE.
17.2.3.2

Programmable run-in and run-out path for G33, G34 and G35

Function
The run-in and run-out path of the thread can be specified with the DITS and DITE statements.
The thread axis is accelerated or braked within the specified path.
①
Short run-in path
Due to the collar on the thread run-in, little room is left for the tool start ramp.
This must therefore be specified shorter via DITS.
Short run-out path
Due to the collar on the thread run-out, little room is left for the deceleration ramp, leading to
the risk of collision between the workpiece and the tool 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.
1318
1
Run-in/run-out path, depending on the machining direction
1
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions