V1: Feedrates
17.2 Path feedrate F
Basic Functions
1376 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
17.2.4.2 Programmable run-in and run-out path for G33, G34 and G35
Application
Figure 17-2 Runin or runout path too short
• Short run-in path
Due to the collar on the thread runin, little room is left for the tool (T) start ramp.
This must therefore be set shorter via DITS.
• Short run-out path
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.
The programmed runin and runout 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.
Activation
The DITS and DITE functions are always active during thread cutting.
Example:
N...
N59 G90 G0 Z100 X10 SOFT M3 S500
N60 G33 Z50 K5 SF=180 DITS=1 DITE=3 ; Start of corner rounding with Z=53
N61 G0 X20
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