Centron Technologies MS930A, Service Manual

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The segmentation unit has all sealing head units
(2)
and a signal distribution board in the
base plate
(1)
. All sealing head units are identical in configuration, but only the trigger
lever in the sealing head unit mounted at #1 position is active and another trigger levers
are in inactive state.
The trigger lever in #1 sealing head unit has two features. In local mode of operation, a
cycle of sealing starts when it is depressed. In any one of three remote modes, it senses
presence of tubing in #1 sealing head unit, then makes control circuit be ready to accept a
remote start command to be given by a remote start switch, a remote start circuit or a
remote control computer only when it detects tubing has been loaded in the #1 sealing
head.
Mounting distances between sealing head units are adjustable at 75, 80, 85 or 90 mm.
Users can adjust the distances as necessary.
An ENABLE/DISABLE selector switch is prepared on the rear panel of each sealing head
unit. If the selector switch is selected at DISABLE, the sealing head unit does not work
even if an ENABLE command is given in remote command mode.
On each sealing head units are two LED indication lamps. The green READY lamp
(6)
is
turned on when the ENABLE/DISABLE selector is set at ENABLE position. The red
SEALING lamp
(5)
is turned on only while sealing is being done. Both lamps will be off if
the ENABLE/DISABLE selector switch is set at DISABLE position.
The head protectors
(4)
should be placed securely all the time with protector screws
(3)
.
Risk of electric shocks at the sealing head may exist if the protector is removed.
Behind the head protector are sealing head section and the trigger lever. Pressing the
trigger lever initiates a cycle of sealing process. The moving part of sealing head comes
out to squeeze tubing, and then RF power is applied. Tubing melts in second. After tubing
melted and hardened again, the moving head retreats automatically.