Mitsubishi Electric M800VW Series Programming Manual page 659

M800V/M80V Series PLC Programming Manual (2/2)
14 PLC Help Function
14.12 Chopping
Chopping feedrate
The chopping axis feedrate is clamped at the chopping axis clamp speed (#2081 chclsp). When "0" is set to the chopping
clamp speed, the chopping axis feedrate is clamped at the G1 clamp speed (#2002 clamp). The acceleration/deceleration
time constant is set with chopping axis acceleration/deceleration time constant (#2141 chtL). When "0" is set to the chopping
axis acceleration/deceleration time constant, the chopping axis linear acceleration/deceleration time constant (#2007 G1tL) is
used.
Speed [mm/min]
chclsp
cht 1
chtL
When the upper dead center point, bottom dead center point and number of cycles are set with chopping control data, the
speed pattern in which acceleration a is "clamp speed/time constant" will be commanded to the servo drive unit.
F
t
When the specified chopping control data is illegal, the alarm is returned to the buffer (Rn). In the following cases, the number
of cycles or feedrate is converted into the value controllable with NC (clamp value) upon occurrence of the alarm.
 When the number of cycles is 0:
Number of cycles is 1/min.
 When F exceeds chclsp:
The following indicates that F exceeds chclsp when the speed pattern is calculated based on the acceleration of chclsp/
chtL. (The number of cycles becomes smaller than that of specified.)
F
chclsp
chtL
(or G1tL)
1/2 number of cycles (s)
 When the number of cycles is 1056/min or more:
The number of cycles is clamped at 1056/min.
IB-1501668-B
Acceleration α
Time [ms]
F
t
1/number of cycles (s)
Pattern by the parameter
Actual pattern (clamp value)
638
chclsp
=
chtL(or G1tL)
chclsp
=
chtL(or G1tL)