Acu-Rite CNC 3500i Benutzerhandbuch

7 Programming: Canned Cycles, sub-programs



This is the chip-breaker peck-drilling cycle, generally used to 
peck-drill medium to deep holes. The cycle feeds from the R-plane 
to the first peck depth in Z, rapid retracts the chip-break increment 
(W), feeds to the next calculated peck depth (initial peck less J), and 
continues this sequence until it reaches a U depth, or until final hole 
depth is reached. The peck distance is never more than I or less 
than K.



This cycle enables optimum drilling conditions for holes. For 
maximum efficiency in deep hole drilling, set parameters to 
accommodate the material and tool types used. Generally, the 
deeper the hole, the smaller the peck distance (J). This prevents the 
binding of chips, tool, and workpiece. Set U to retract the drill 
completely at set depth intervals.



G-code format: G87

ZDepth

Z

Absolute hole depth. (Required)

MinPeck

K

Minimum peck distance (positive 
dimension). Required.

StartHgt

R

Initial Z start point, in rapid. (Required)

PeckDecr

J

Amount to subtract from previous peck 
(positive dimension). Required.

FirstPeck

I

First peck distance (positive dimension). 
Required.

ReturnHgt

P

Z return point after hole depth, in rapid.

Retract 
Dep

U

Incremental depth between full retracts 
(positive dimension).

ChipBrkInc

W

Chip break increment (positive dimension).

Feed

F

Feedrate