Miscellaneous functions | Miscellaneous functions for path behavior
Feed rate factor for plunging movements: M103
Standard behavior
The control moves the tool at the last programmed feed rate,
regardless of the direction of traverse.
Behavior with M103
The control reduces the feed rate when the tool moves in the
negative direction of the tool axis. The feed rate for plunging FZMAX
is calculated from the last programmed feed rate FPROG and a
factor F%:
FZMAX = FPROG x F%
Programming M103
If you program M103 in a positioning block, the control continues the
dialog by prompting you for the F factor.
Effect
M103 becomes effective at the start of the block.
Cancel M103: Program M103 once again without a factor.
M103 is also effective with an active tilted working plane
coordinate system WPL-CS. The feed rate reduction is
then effective during infeed movements in the virtual tool
axis VT.
Example
The feed rate for plunging is to be 20% of the feed rate in the plane.
...
Actual contouring feed rate (mm/min):
17 L X+20 Y+20 RL F500 M103 F20
500
18 L Y+50
500
19 L IZ-2.5
100
20 L IY+5 IZ-5
141
21 L IX+50
500
22 L Z+5
500
7
HEIDENHAIN | TNC620 | Klartext Programming User's Manual | 01/2022
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