Electro Cam 5000 Series - Manual (Page 48)

5-7 Programming, Optional Features
Phase Mark Registration: Option “-P”
270 90
120
300
Example 1 illustrates the following:
CHN 14 - ON @ 290 OFF @ 350
CHN 15 - ON @ 10 OFF @ 70
CENTER POSITION = 0
If the registration mark is sensed while CHN 14 is on, the
registration control will determine that the material should
be retarded. If the registration mark is sensed while CHN
15 is on, the registration control will determine that the
material should be advanced. If the registration mark is
sensed between the CHN 14 and CHN 15 on pulses, the
registration is within tolerance and no adjustment is needed.
Example 2 illustrates the following:
CHN 14 - ON @ 320 OFF @ 20
CHN 15 - ON @ 40 OFF @ 100
CENTER POSITION = 30
Although the channel 14 and 15 values in example 2 seem
very different from example 1, they are actually the same
pulses phase shifted so that the center between them is
now 30 instead of 0. To get from example 1 to example 2,
it was NOT necessary to go into channels 14 or 15 to make
changes, only the center position had to be changed. The
pulses in outputs 14 and 15 are automatically adjusted to
correspond to the new center position.
The following methods change the center position:
Decrease/Increase Inputs (logic terminals 3 & 4)—
Energize the Decrease or Increase input to shift the
registration pulses and center position by one increment in
the corresponding direction (remote push buttons).
Center Input (logic terminal 5)—Energize the Center Input
on the logic input strip to change the registration center
position to the current machine position.
Channel 81—Select CHN 81 and the existing center value
will be displayed. Press INC / DEC keys or key in a new
center value and press ENT to change it.
Channel 80 - Select CHN 80 and press ENT to change the
registration center position to the current machine position
(machine was at 30 in example 2).
To accomplish registration control, it is necessary to wire
channel 14 and 15 outputs, and the registration mark
sensor, as inputs to a registration control system or PLC.
Exact wiring is determined by the control system being
used.
Some registration control systems will use the “off” portions
of channels 14 and 15 as the registration windows. The “P”
option can automatically handle these applications as well.
Detailed explanation of this "Off" logic is on page 5-13.
C
H
N
1
4
C
H
N
1
5
60˚ 60˚
CHN 81 = 0
(CENTER POSITION)
350 10
70
290
REG.
MARK TOO
SOON REG.
MARK TOO
LATE
90˚
180˚
270˚
CHN
14
C
H
N
1
5
60˚
60˚
CHN 81 = 30
(CENTER POSITION)
320
20
40
100
REG.
MARK TOO
SOON
REG.
MARK TOO
LATE
90˚
180˚
270˚
0˚
Registration Window Examples and Adjustment Methods
The “P” option (phase mark registration) dedicates two
PLuS outputs—Channels 14 & 15—as registration
inspection windows for input to registration controls or
PLCs. In many cases, this can replace mechanically adjusted
registration sensor mechanisms at far less cost, without
sacrificing ease of adjustment. Registration adjustments
can be made through keyboard commands or dedicated
increase and decrease hardware inputs (push buttons,
etc.). Output channels 14 and 15 are programmed individually so
they have the output duration and phase relationship required
by the registration control system. Once both channels are
programmed, their setpoints can be simultaneously moved
to any machine position without altering their duration or
their phase relationship to each other. This greatly simplifies
registration setup and adjustment. Outputs 14 and 15 can
be used interchangeably as “too soon” and “too late” signals,
and their pulse durations do not have to be equal.
Note: Substitute channels 7 & 8
for 14 & 15 on 9 output units.