Enhanced Level Commands
4.1 Program support functions (1)
04.07
4-99
© Siemens AG 2007 All rights reserved
SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D ISO Milling (PGM) -- 04.07 Edition
Explanations
When using cycle G73 retraction movement is performed in rapid traverse after
each drilling operation. GUD _ZSFR[0] can be used to enter a safety clearance.
The retraction amount for chipbreaking (d) is determined through GUD _ZSFR[1]
as described below:
_ZSFR[1] > 0 Retraction amount as entered
_ZSFR[1] = 0 Retraction amount is always 1 mm or 1 inch with chipbreaking
Infeed is performed by using depth of cut for each cutting Q, which is incremented
by the retraction amount d as of the 2nd infeed.
By means of this drilling cycle a rapid drilling infeed is accomplished. Removal of
the drilling chips is facilitated through the retraction movement.
Note
If is need to specify 0 mm or 0 inch, set a smaller value than the movable resolu-
tion.
Example
M3 S1500; Rotate spindle
G90G0Z100
G90 G99 G73 X200. Y--150. Z--100. R50. Q10. F150.;
Position, drill hole 1, and return to point R.
Y--500.; Position, drill hole 2, and return to point R.
Y--700.; Position, drill hole 3, and return to point R.
X950.; Position, drill hole 4, and return to point R.
Y--500.; Position, drill hole 5, and return to point R.
G98 Y--700.; Position, drill hole 6, and return to the initial level.
G80; Cancel canned cycle
G28 G91 X0 Y0 Z0; Return to the reference position return
M5; Spindle stop
4.1.3 Fine boring cycle (G76)
Precise boring of a hole is accomplished through the fine boring cycle.
Format
G76 X... Y... R... Q... P... F... K... ;
X,Y: Hole position
Z_: Distance from point R to the bottom of the hole
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