GSK GSK980TDc, Manual

Page: 141 / 470

Chapter 3 G Commands
123
Ⅰ
Progra
mming
Execution explanations ：
z
Operation 1
：
positioning to the hole position
（
starting point of rigid tapping
） ；
z Before starting operation 2, the system outputs M α when it has M code used to clamp the
spindle;
z Operation 2
：
start the rigid tapping
；
z Operation 3 ： pause time P in rigid tapping in hole bottom;
z Operation 4
：
the rigid tapping returns to the hole bottom
（
starting point of rigid tapping;
z
When the block for rigid tapping specifies M code used to clamp the spindle, M β is output.
Note: α value is set in № 170, β ＝ α ＋ 1, so, these corresponding M codes in PLC are executed.
Rigid tapping sequence
Taking example of G84 right-hand tapping, explain the creation, execution and cancellation of
rigid tapping.
Creation and execution of rigid tapping
The spindle rotation operation is defined that the rotary axis is switched to the position control
mode(i.e. send the position mode switch signal to the servo spindle), and the system checks the
position mode arrival signal of the servo spindle.
Rigid tapping cancellation
The cancellation methods of rigid tapping are shown below:
1
）
G80 cancels the rigid tapping mode;
2 ） G codes commands other cycles;
3 ） Other G codes in Group 01;
4
）
CNC resets.
The falling edge of F76.3 signal cancels the rigid tapping mode signal.
(a) RTCRG( № 186
＃
2) is set to ‘1’ when:
The system executes directly the next block instead of waiting the rigid tapping mode signal
RGTAP<G61
＃
0> to become ‘0’.