Mitsubishi Electric MELDAS C6 Programming Manual page 159

13. Program Support Functions
(3) There are 7 actual operations which are each described in turn below.
Operation 1 : This indicates the X and Y axes positioning, and executes positioning with G00.
Operation 2 : This is an operation done after positioning is completed (at the initial hole), and
Operation 3 : The tool is positioned to the R point by rapid traverse.
Operation 4 : Hole machining is conducted by cutting feed.
Operation 5 : This operation takes place at the hole bottom position and it differs according to
Operation 6 : The tool is retracted to the R point.
Operation 7 : The tool is returned to the initial pint at the rapid traverse rate.
Whether the canned cycle is to be completed at operation 6 or 7 can be selected by the
following G commands.
G98 ............ Initial level return
G99 ............ R point level return
These are modal commands, and for example, if G98 is commanded once, the G98 mode will
be entered until G99 is designated. The initial state when the NC is ready is the G98 mode.
The hole machining data will be ignored if X, Y, Z or R is not commanded. This function is
mainly used with the special canned cycled.
(4) Canned cycle addresses and meanings
Address
G
X
Y
Z
P
Q
R
F
L
I, J, K
S
, S
, R
Operation 1
R point
when G87 is commanded, the M10 command is output from the control unit to
the machine. When this M command is executed and the finish signal (FIN) is
received by the control unit, the next operation will start. If the single block stop
switch is ON, the block will stop after positioning.
the canned cycle mode. Possible actions include spindle stop (M05) spindle
reverse rotation (M04), spindle forward rotation (M03), dwell and tool shift.
Selection of hole machining cycle sequence (G80 to G89, G73, G74, G76)
Designation of hole drilling position (absolute value or incremental value)
Designation of hole drilling position (absolute value or incremental value)
Designation of hole bottom position (absolute value or incremental value)
Designation of dwell time at hole bottom position (decimal points will be
ignored)
Designation of cut amount for each cutting pass with G73 or G83, or
designation of the shift amount at G76 or G87 (incremental value)
Designation of R point position (absolute value or incremental value)
Designation of feed rate for cutting feed
Designation of number of repetitions. 0 to 9999
Designation of shift amount at G76 or G87 (incremental value)
(The shift amount is designated with the Q address depending on the
parameter setting.)
Spindle rotation speed command
Spindle rotation speed designation for synchronous tap retract
Synchronous/asynchronous tap cycle selection
151
13.1 Canned cycles
Operation 2
Initial point
Operation 3
Operation 7
Operation 4
Operation 6
Operation 5
Significance