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10) SPRING PRE-LOAD RESETTING PROCEDURE (FOR SLT, SLTB, LET, LETB MODELS ONLY)
Only read this paragraph if the re-closure spring load decreases due to the failure to comply with the correct installation
procedures.
The automation is supplied with the re-closing spring preloaded to a
standard value, which is indicated by the alignment of the red mark
on the belt with the red mark on the pulley (see the figure aside).
If, during installation, the arm is unintentionally disconnected without
first resetting and locking the spring with the locking screw, the
spring loosens well beyond its standard value.
To move it back to the correct position, strictly follow the steps listed
below:
a) Fully disconnect the arm from the output pin, if it is still inserted.
b) Make sure that the manual program selector on the side of the
automation is set to "0".
c) Connect the mains power supply
(see paragraph ELECTRICAL CONNECTIONS).
d) Erase the set-up if it has already been stored on the automation
control unit (see paragraph "MAINTENANCE")
e) Press and hold pressed the PS1 (START) button on the PWB
card; the control unit emits 5 beeps and starts the spring loading
operation.
Reset the spring load to the standard value indicated by the
alignment of the red mark on the belt with the red mark on the pulley
(see the figure aside); once the position has been reached, release
the PS1 button.
If, during the re-loading operation, the spring should
exceed the preset level indicated by the red line, you can
slowly decrease its load by moving to position
I
the manual
program selector.
In position
II
, instead, the spring will rewind quickly!
Move your fingers or other body part away from the moving
components.
f) Move the locking screw from the released position to the locked
position, taking care to ensure that the screw is inserted into the
pulley.
g) After this operation the initial set-up must be repeated (see
paragraph "INITIAL SET-UP").
PULLEY REFERENCE
BELT REFERENCE
LOCKED
