GSK GSK988TA, Руководство пользователя

Страница: 315 / 531

Chapter 5 Manual Operatio n
297
Ⅱ
Operation
Reverse movement
The “Reverse movement” is to make the positive movement’s blocks being reversely executed
by the MPG reversely rotation (anticlockwise rotation). The reverse program’s execution speed and
the MPG’ speed are proportional.
5.5.1 MPG Retreat Operation Method
In automatic run mode, set the check mode signal MMOD<G67.2> to “1” and set the CNC to the
check mode, start executing the program by the cycle start.
This moment, when the MPG check signal MCHK<G67.3> is set to “1”
，
the MPG’s pulse controls
the program execution in the check mode, and a run which is synchronous with the pulse is
executed.
When the check mode signal MMOD<G67.2> in program run becomes “1”, the block in the next
buffer starts to become the check mode, namely, even if the check mode signal is set to “1”, the
system does not immediately become the check mode.
When the CNC becomes the check mode, the check mode confirmation signal MMMOD<F91.3>
becomes “1”.
5.5.2 Speed Control based on the MPG
The MPG’s machine movement speed is determined by No.6410 and the MPG override. The
machine movement speed is counted according to the following formular during the actual rotating
the MPG:
[Code speed]×[1 second’ MPG quantity]×[MPG override]×([the parameter’s setting value ]/100)
×(8/1000)(mm/min or inch/min)
Example
：
The code speed is 30mm/min
，
MPG override is 100
，
No.6410=1: 1 rotation
（
100 pulses
）
/second’s speed rotating the MPG, the movement speed is counted by the following formular:
[movement speed]=30×100×100×
（
1/100
）
×
（
8/1000
）
= 24[mm/min]
Limitation ： when the override exceeds 100% because of rapidly rotating the MPG, it is clamped at
100%, namely:
[1 second’s MPG quantity]×[MPG override]×([the parameter’s setting value]/100) ×(8/1000)
When the MPG’s pulse exceeds 1, the speed is clamped.
The rapid traverse speed is clamped at 10% speed. When RPO(No.6400.0) is set to “1” ， the
override 100% is clamped. Besides, when No.6405 is set to any values, any override value can be
clamped. When No.6405 setting value is more than 100, it is clamped at 100% value. When No.6405
is set to 0
，
RPO
（
No.6400.0
）
setting value is valid.
When the MPG control is executed, the single block stop signal and feed hold signal are invalid.
When the single block stops or feed hold completely stops and the cycle start signal is not valid, the
program remains stop state.
Blocks for movement and pause can control the program’s execution speed by the MPG rotation.
For the block only with M, S, T, F code, without movement and pause blocks, the control transfers to
the next block even fi the MPG does not rotate.