Manual

Drilling Cycles
Chapter 26
26-31
When using Method II, remember:
the generated move is a single linear move and executes at
The format for the G87 back boring cycle is:
G87X__Z__ I__J__K__ R__F__L__;
Q__
Where : Is :
X specifies location of thehole.
Z defines the Zpoint level. The Z point level in thiscase isthe top of the
hole that is being cut bythe backboring operation.
Q or I,
J, K
defines thetool shift amount.
R defines the positionbeyond thehole bottom so thetool can safely shift.
F defines the cuttingfeedrate.
L defines the numberof times thedrilling cycleis repeated.
Important: This cycle requires an existing hole through which the back
boring tool can be safely lowered prior to the back boring operation.
(G87): Back Boring Cycle