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CYCLE83 Deep hole drilling, peck cycle

Siemens 840D 828D G-code · Mill

Drills in steps. VARI=0 breaks the chip with a short retract, VARI=1 retracts fully to clear chips. Each step can get smaller by the degression amount DAM.

Format

CYCLE83(RTP, RFP, SDIS, DP, DPR, FDEP, FDPR, DAM, DTB, DTS, FRF, VARI)

Addresses

Address	What it does
`RTP`	Retract plane, absolute
`RFP`	Reference plane, absolute, usually the part top
`SDIS`	Safety distance above the reference plane, no sign
`DP`	Final depth, absolute
`DPR`	Final depth relative to the reference plane, no sign. Program DP or DPR and leave the other empty.
`FDEP`	First drilling depth, absolute
`FDPR`	First drilling depth relative to the reference plane
`DAM`	Degression, amount each step gets smaller
`DTB`	Dwell at each depth in seconds
`DTS`	Dwell at the start point for chip removal in seconds
`FRF`	Feed factor for the first depth, 1 means 100 percent
`VARI`	0 chip breaking, 1 chip removal with full retract

How it works

Non modal. It runs once at the current position. Use MCALL to repeat it at every following position.

Example program

T6 D1 ; 6.8 MM DRILL
M6
G0 X40 Y20 F150 S2400 M3 ; OVER HOLE
Z50
…

The full 6-line example is in the app. Example is in inch. Check offsets and clearances first.

Watch out for

Program F, S and the spindle direction before the call. The cycle uses the active values.
Use VARI=1 for holes deeper than about 3 times the diameter so chips leave the hole.

Related codes

CYCLE81 · MCALL

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Open CYCLE83 in the app All Siemens 840D 828D G-codes

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