TOMATECH AUTOMATION
mode.
8.3 MPG Trial-cut
The user can use MPG trial-cut function after editing part programs, check the run path of
program. In MPG trial-cut function, rotating MPG controls the execution speed of program,
which can
easily check the program error conveniently.
8.3.1 Switching MPG trial-cut mode
Press to enter the MPG trial-cut mode after a machinig program is selected as follows:
Chapter 8 AUTO Operation
261
Ⅱ Operation
At the moment, press and the display is shown below:
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.
8.3.2 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) ×
262
Ⅱ Operation
(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)×
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