Mitsubishi Electric Q Series Programming Manual page 63

4 POSITIONING DEDICATED SIGNALS
(b) M3214+20n : OFF
(Final servo command value in previous virtual mode operation)
(Current servo current value)  (In-position) ............................1)
• For formula 1)
Operation will be continued by making the lower stroke limit value and
current value within 1 cam shaft revolution into the lower stroke limit
value and current value within 1 cam shaft revolution at the previous
virtual mode operation.
(Final servo command value in previous virtual mode operation )
(Current servo current value) > (In-position) ............................2)
• For formula 2)
Current value within 1 cam shaft revolution for current feed current value
is calculated and operation will be continued by making the lower stroke
limit value into the lower stroke limit value at the previous virtual mode
operation.
[Calculation of current value within 1 cam shaft revolution]
(Feed current value) = (Stroke amount)
The stroke ratio(y) used as above formula is calculated, the cam table of
the setting cam No. is searched from the beginning of a cycle, and the
current value within 1 cam shaft revolution for applicable point is calculated.
Because the current value within 1 cam shaft revolution is searched always
from the beginning of a cycle, beware of cases where the same stroke ratio
appears more than once in the cycle.
(Make the necessary position adjustment at the real mode/virtual mode
switching.)
Stroke amount
Lower stroke limit value
(5) Servo OFF command (M3215+20n) ......................Command signal
This command is used to execute the servo OFF state (free run state).
• M3215+20n : OFF ......... Servo ON
• M3215+20n : ON ........... Servo OFF (free run state)
Execute this command after positioning completion because it becomes invalid
during positioning.
When the servo OFF command is executed in virtual mode, the clutch will be
disengaged first. If it is executed while a "clutch ON" state, a minor error occurs
and the servo OFF command becomes invalid.
(Stroke ratio) + (Lower stroke limit value)
32767
y
Stroke
ratio
A
1 cycle (1 cam shaft revolution)
4 - 24
In the figure at left, there are 2 relevant
points (A and B) for the calculated stroke
ratio "y", but only point "A" is recognized.
B Number of pulses within
1 cam shaft revolution-1