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GSK980TDi Turning CNC System User Manual
312
Ⅱ
Operation
At the moment, rotating MPG makes the program start running. When the execution speed of
program is proportional to MPG speed, execution speed of program fastens as soon as the MPG
rapidly rotates; the execution speed slows down as soon as the MPG slowly rotates. Movement
amount of one pulse can be adjusted by rapid override.
When the system is in the MPG trial-cut mode, it returns to Auto mode after
is pressed. All
operations in MPG trial-cut mode are the same those of Auto mode.
9.3.2 Command Speed in MPG Trial-Cut Mode
1) Cutting
feedrate
Cutting command speed in MPG trial-cut mode is determined by No. 241 and rapid override. The
command speed during actually rotating MPG is executed by the following:
[Command speed]×[MPG pulse amount per 1 second]×
λ
×([the parameter setting value] /100) ×
(8/1000) (mm/min or inch/min)
。
λ
value is determined by the current rapid override, and their relationship is:
Rapid override
λ
value
Rapid override
λ
value
F0 1 25% 10
50% 100 100% 100
Rapid traverse speed is clamped at 100% speed when it exceeds 100%, i.e.:
[MPG pulse amount per 1 second]×
λ
×([No.241setting value]/100)×(8/1000)
≤
1
2) Rapid traverse speed
Rapid traverse speed is clamped at the speed set by No.240, i.e.:
[Rapid traverse speed]
＝
[rapid traverse speed of each axis]×([No.240 setting value]/100)× [MPG
pulse amount per 1 second]×
λ
×([No.241 setting value]/100)×(8/1000)
At the moment, when the speed by rapidly rotating MPG exceeds the clamped, the rapid traverse
speed is clamped at the setting value by parameter, i.e.:
[MPG pulse amount per 1 second]×
λ
×([No.241 setting value]/100)×(8/1000)
≤
1
9.3.3 Notes in MPG Trial-Cut Mode
Pay more attention to the followings when the system is in MPG trial-cut mode:
1) Press
in Auto mode and the CNC does not switch to MPG trial-cut mode; when the
CNC is in MPG trial-cut mode, it escapes the MPG trial-cut mode from the next block by
