-Shenzhen Guanhong Automation Co.,Ltd.-
SZGH-CNC1000MDb Series
- 67 -
3.28 Canned Cycle (G73-G89)
Canned cycles make it easier for the programmer to create programs. With a canned cycle, a
frequently-used machining operation can be specified in a single block with a G function; without
canned cycles,normally more than one block is required. In addition, the use of canned cycles can
shorten the program to save memory.
Table3.22 Canned Cycles
G
code
Feed mode
(-Z direction)
Operation at the
bottom of hole
Retraction
(+Z direction)
Application
G73
Intermittent feed
-
Rapid traverse
High-speed peck drilling cycle
G74
Feed
Dwell
SP CW
Feed
Left-hand tapping cycle
G76
Feed
Oriented SP Stop
Rapid traverse
Fine boring Cycle
G80
-
-
-
Cancel
G81
Feed
-
Rapid traverse
Drilling cycle,spot drilling cycle
G82
Feed
Dwell
Rapid traverse
Drilling cycle, spot drilling cycle
G83
Intermittent feed
-
Rapid traverse
Peck drilling cycle
G84
Feed
Dwell
SP CCW
Feed
Tapping cycle
G85
Feed
-
Feed
Boring cycle
G86
Feed
Spindle Stop
Rapid traverse
Boring cycle
G87
Feed
Spindle CW
Rapid traverse
Back boring cycle
G89
Feed
Dwell
Feed
Boring cycle
A canned cycle consists of a sequence of six operations(Fig3.22.1)
Operation 1 Position of X and Y axis(including also another axis)
Operation 2 Rapid traverse up to point R level
Operation 3 Hole Machining
Operation 4 Operation at the bottom of a hole
Operation 5 Retraction to point R level
Operation 6 Rapid traverse up to the initial point
Fig3.22.1 Canned cycle operation sequence