GSK 988T, User Manual

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GSK988T Turning CNC System User Manual
112
Ⅰ
Programming
Relevant command explanation is referred to those of G83/87.
Execution process:
①
The tool rapidly positions to the hole
from starting point (the hole is determined by
the hole position data at the initial level
）
;
②
Rapidly position to point R
；
③
The cutting feed is executed to the hole
bottom at the speed specified by F;
④
Pause is executed in the time specified
by P;
⑤
Rapidly retract to the level where point R is;
(No.5149 is used for setting the override of
boring retraction. When it is set to 0, the
double speed of F value is default to execute
tool retraction
⑥
Return rapidly to the initial level;
⑦
Drilling cycle ends.
Fig. 2-72
2.19.3 Cancelling Drilling/Boring G80
The command is used for cancel the drilling fixed cycle.
Command format: G80
；
After G80 is executed, the hole position data, R and other drilling data are cancelled, and the
mode of drilling cycle is also done.
2.19.4 Notes for Drilling/Boring Cycle
Note 1: When the reset or emergency stop is executed, the mode of drilling cycle remains. The user must
pay more attention to it when the program is started again.
Note 2: The single block stops at end point of operation 1, operation 2 or operation 6.
Note 3: When drilling/boring cycle is executed, creating or cancelling tool compensation command is
executed, the command is valid after the cycle ends.
2.20 Tapping Cycle Command
GSK988T CNC Turning System uses end tapping cycle (G84) and side tapping cycle (G88) to
complete the tapping function. Tapping is divided into common tapping (flexible) and rigid tapping
mode. In the common tapping mode, the spindle rotation and feed amount of tapping axis are
controlled separately, their synchronous relationship is not controlled well. In the rigid tapping
mode, the control of spindle motor is the same that of servo motor, the spindle rotating one circle
corresponds to some axial feed amount of the spindle even if the spindle accelerates/decelerates.
In the rigid tapping, the spindle can rapidly and exactly tap without using the floating chuck or
variable screw tap(use it in the common tapping mode).
M29(it can set other M command according to parameter or directly use G command to
Operation sequence
Tool
Pause
Z （ X ） feed
Rapid traverse
P
Initial level
Hole position
Starting
point
Hole bottom level
Pause at hole bottom
P
Imaginary workpiece
Boring cycle
Point R level