FANUC Series 16/18/160/180-Model C Machining Center Operators Manual

PROGRAMMING
14. FUNCTIONS TO SIMPLIFY
PROGRAMMING
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A direct constant–dimension plunge grinding cycle is performed.
G77
G77 I_ J_ K_ X(Z)_ R_ F_ P_ L_ ;
I_: Depth–of–cut 1 (A sign in the command specifies the direction
of cutting.)
J_ : Depth–of–cut 2 (A sign in the command specifies the direction
of cutting.)
K_ : Total depth of cut
X(Z)_ : Range of grinding (A sign in the command specifies the direction
of grinding.)
R_ : Feedrate for I and J
F_ : Feedrate for X (Z)
P_ : Dwell time
L_ : Grinding–wheel wear compensation (Only for continuous
dressing)
I
J
X(Z)
(R)
P
(F)
P
X(Z)
Y
(F)
(R)
The constant–dimension plunge grinding cycle consists of six operation
sequences. Operations to are repeated until the depth reaches the
total depth of cut specified at address K.
Cutting is performed along the Y–axis in cutting feed mode for the
amount specified by I (depth of cut 1). The feedrate is specified by R.
Dwell is performed for the time specified by P.
Cutting feed is performed for the amount specified by X (or Z). The
feedrate is specified by F.
Cutting is performed along the Y–axis in cutting feed mode for the
amount specified by J (depth of cut 2). The feedrate is specified by R.
Dwell is performed for the time specified by P.
Feeding is performed in the reverse direction for the amount specified
by X (or Z) at a feedrate specified by F.
14.3.2
Direct
Constant–dimension
Plunge Grinding Cycle
(G77)
Format
Explanations
D Grinding wheel cutting
D Dwell
D Grinding
D Grinding wheel cutting
D 
D Grinding
(return direction)

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