4 Programming of Motion Blocks 05.91
4.2.8 Dwell G04
4.2.8 Dwell G04
Dwell times are required for relief cutting, and sometimes for speed changes and machine
switching functions (steady, tailstock, etc.).
The action of G04 is block by block.
No other functions may be written in a block containing a dwell time.
The dwell time is always stated without sign.
The dwell is entered under address X or F.
0.001 to 99999.999 s for X and
0.001 to 99.999 s for F.
Example:
N.. G04 X11.5 L
F
(Dwell 11.5 s)
A further option is to program the dwell in spindle revolutions. The dwell is then programmed
under address S in the range between 0.01 and 99.9 revolutions.
Example:
N.. G04 S5 L
F
(Dwell 5 spindle revolutions)
4.2.9 Soft approach to and retraction from the contour
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The “Soft aprroach to and retraction from the contour”
function is an Option.
The order code is: B58
To avoid cutting marks a contour is approached and exited tangentially.
Soft approach to and retraction from a contour can be used for all types of tools. “Radius” and
“Wear” are calculated.
Approach to and retraction from the contour can be programmed with the following functions:
G147 Approach linear
G247 Approach in quarter circle
G347 Approach in semi circle
G148 Retraction linear
G248 Retraction in quarter circle
G348 Retraction in semi circle
G48 Retraction from the contour as it was approached
4–30
© Siemens AG 1991 All Rights Reserved 6ZB5 410-0HD02
SINUMERIK 880, (PG)
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