Mitsubishi Electric MR-J4-_GF, Инструкция по эксплуатации

Страница: 213 / 274

9. MANUFACTURER FUNCTIONS
9 - 28
(4) Compensation by touch probe
This system detects registration marks printed on the sheet in equal intervals, and compensates the
difference between the actual cam axis current value per cycle and the ideal cam axis current value per
cycle (set value of the cam position compensation target position) by shifting the synchronous phase of
the rotary knife axis and the conveyor axis.
Setting example: When the ideal detection position of the registration mark is 150 mm, the distance
between the detection position and the cutting position is 50 mm but the mark is not
detected unless the conveyor feeds the sheet by 151 mm due to expansion of the
sheet
The cutting position is compensated to keep a distance of 50 mm from the registration
mark detection position.
Item Setting and operation
Cam position compensation target
position
([Cam control data No. 60]) In this example, the ideal detection position of the registration mark is at 150 mm of the cam
axis current value per cycle. Set "150" in the cam position compensation target position.
Cam position compensation time
constant
([Cam control data No. 61]) In this example, the position compensation is executed by one-shot. Set "0" in the cam
position compensation time constant.
Main axis current value
Cam axis one cycle
current value
Rotary knife angle
(Cam axis feed current
value)
360°
180°
0°
Registration
mark
Sheet
Conveyor travel distance
(Cam axis input amount)
Control DI 2 bit 13
151 mm
150 mm
ON
OFF
150 mm 150 mm 151 mm 151 mm
50 mm
201 mm 201 mm 200 mm 200 mm
50 mm 50 mm
The difference (1 mm) between the registration mark detection
position (151 mm) and the cam position compensation target
position (150 mm) is compensated.
Cutting position
(Note)
Note. The dot-and-dash line in the figure shows a waveform of when compensation is not executed.