Garland MWE3S, Руководство по обслуживанию

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SERVICE MANUAL GARLAND CLAMSHELL GRILLS WITH PRODUCT RECOGNITION
PART #4526396 (03/30/10) Page 44
REED SWITCH OPERATION
(continued)
Explanation of calibration numbers, auto calibration, and other Reed Switch variables.
441: PLATEN IN THE PARALLEL POSITION 442: PLATEN RESTING ON GRILL PLATE
443: REAR REED SWITCH MAKING, SHOULDER
BOLTS RECESSED INSIDE THE PLATEN ARM.
REAR�REED�CAL�SET
AND STORED IN
CONTROLLER
CALIBRATION
MENU.
444:
FRONT REED SWITCH MAKING, SHOULDER
BOLTS RECESSED INSIDE THE PLATEN ARM.
FRONT�REED�CAL�SET
AND STORED IN
CONTROLLER CALIBRATION MENU.
After the platen reaches the parallel position ( 441 ), the actuator will continue to run bringing the platen to a resting
position on the grill plate as shown ( 442 ).
Once the platen is resting on the grill surface, the linear
actuator will continue to run, lowering the platen arm even
more, causing the shoulder bolts to ride up into the arm.
This�is�the�reason�why�the�lock�nuts�are�hollowed�out�
all�the�way�through�
While the platen arm is lowering, the rear reed switch is
closed when it makes contact with the magnet mounted
on the arm. The number of counts from 0 gets stored in
the control as
BACK�REED�CAL
. (
44:3
).
The linear actuator will continue lower bringing the platen
arm down until the front reed switch makes contact with
the magnet. The number of counts from 0 gets stored in
the control as
FRONT REED�CAL
. (
44:4
).
The timeline (
445
), shows negative actuator movement,
(platen arm downward), and the sequence in which
different reference points are achieved. Point
1
represents
the number of encoder counts from 0 at which the
rear
reed switch closed (or made contact with the magnet).
2
is
the number of encoder counts from 0 that the
front
reed
switch closed (or made contact with the magnet).
IMPORTANT�– The number of encoder counts between
points 1 & 2 is DELTA�CAL�(ΔCAL) . ΔCAL must be below�
200 . The following conditions apply:
ΔCAL�<�200:
OK
ΔCAL�>�200,�<�300:
“Check Platen Level” (Disables Auto
Mode, allows operation in Manual Mode only.)
ΔCAL�>�300: “Platen Not Level / Use Flat Cook”
(Disables all clamshell cooking.)
During auto calibration, after the front reed switch is made,
polarity and actuator direction are reversed, (
446
). The
actuator raises the platen arm, referencing point
3
when
the
front
reed switch reopens, as
FRONT�ZERO�CAL
Point
4
, when the
rear
reed switch opens, is recorded as
BACK�
ZERO�CAL
.
MAGNETS FRONT
446:
POSITIVE LINEAR ACTUATOR MOVEMENT
Lower Limit Switch
Gap = .082”
Encoder Count = 0
Rear Reed
Switch Open
Front Reed
Switch Open
0 1 4 2 3
445: NEGATIVE LINEAR ACTUATOR MOVEMENT
Lower Limit Switch
Gap = .082”
Encoder Count = 0
Rear Reed
Switch Made
Front Reed
Switch Made
0 1 2
ΔCAL