Siemens SINUMERIK 840Di Function Manual page 1619

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

• Short run-in path

• Short run-out path

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.

The DITS and DITE functions are always active during thread cutting.

N59 G90 G0 Z100 X10 SOFT M3 S500

N60 G33 Z50 K5 SF=180 DITS=1 DITE=3

Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0

Run-in or run-out path too short

Due to the collar on the thread run-in, little room is left for the tool (T) start ramp.

This must therefore be set shorter via DITS.

Due to the collar on the thread run-out, little room is left for the tool deceleration ramp,

leading to the risk of collision between the workpiece and the tool edge. The tool braking

ramp can be set shorter via DITE. Due to the inertia of the mechanical system, however,

a collision can nevertheless occur.

Remedy: Program a shorter thread, reduce the spindle speed.

Detailed Description

2.1 Path feedrate F

; Start of smoothing with Z=53

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