Fromm FS380, Use And Maintenance Manual, Page: 41 / 100

Fromm
35
MACHINE DESCRIPTION
35
A
3
1
7
2
4
3
1
7
2
4
7
8
4
7
8
4
A A
A A
Clockwise plate rotation Anti-clockwise plate
rotation
With this carriage version, the tension with which the filmis applied to
the pallet.
This carriage allows pre-stretching the film. Pre-stretch value can be
set between 120% and 400% .
The carriage is fitted with:
• a sensor (4) , connected to the outfeplied to the pallet;
• two gearmotors which drives the rubber-coated roller (1) , (2)
and (3) by means of toothed gearing;
• three idle rollers which are used to increase the winding angle
of the film on the rubber-coated rollers.
A specific electronic card integrates the signal of the sensor (4) with the
adjustment set with setting F13-16 (F32-33) functions in the control
panel in order to dynamically control the speed of the pre-stretch roller
drive motor and thus the film tension.
Can be adjusted using F17-20 functions in the control panel controls
the rotation of the roller (1) and (2) .
The speed difference generated between the rubber-coated rollers
(1) , (2) and (3) creats the pre-stretch action.
Upon starting, the film must be loaded onto the carriage.
• Put the carriage into the down position to make fitting the roll
easier.
• Turn the main switch to the ‘O’-OFF position.
• Push the roll (7) onto the centre pin (8) .
• Open the door and insert the film between the rollers following
the path indicated in figure (A) , the symbol with the triangles
identifies the side of the film to which the bonding agent (if
present) is applied.
• Diagram (A) is also attached to the carriage.
• Close the door making sure it is correctly secured.
• Turn the main switch to the ‘I’ -ON position.
Picture 20