Tesmec AFS303, Installation, Operation And Maintenance Manual

Page: 19 / 88

PULLER-TENSIONER
Model: AFS303
Manual: MI-AFS303-320-00-GB Date: 30.03.2015 Author: MC Page: 16 of 32
4.8 CONNECTION MACHINE-HYDRAULIC HEAD OF THE REEL ELEVATOR OR REEL
WINDER
Each hydraulic head (or each reel-winder) has a connecting kit consisting of two pipes.
Each of these pipes has to be connected at the proper rapid connection taking care to connect them
properly (otherwise the installation will not work).
ATTENTION: it is important that, before connecting the rapid connections, the operator
has checked their cleanliness as the introduction of dirt into the hydraulic circuit can
create very serious damages.
ATTENTION: the rapid connections must be connected before to put in pressure the
circuit.
ATTENTION: the cocks must be opened when connecting the hydraulic heads (or reel
winders).
4.9 PULLING OPERATIONS
ATTENTION: before carrying out any operation it is necessary to verify if the selectors
(table 1, pos. 5 and 27
– optional) are turned towards leftwards .
a. Adjust the rpm of the diesel engine using the accelerator (table 1, pos. 12): puller
– 2600-rpm max.,
tensioner
– 1800/2000 rpm. The number of rpm can be read on the instrument on the panel
(table 1, pos. 17).
b. Adjust the feeding pressure of the hydraulic heads connected to the machine by the valve
(table 1, pos. 10) and read the correspondent value on the manometer (table 1, pos. 11).
When using the machine as puller, the pressure of the hydraulic heads will be from 60 bars (reels
with few turns) till a max. value of 120-130 bars (full reel).
Using the machine as tensioner, the pressure of the hydraulic heads can be set at 60-70 bars.
NOTE: the adjusting valve (table 3, pos. 10) regulates the pressure of the two circuits of
the reel elevators/reel winders, at the same time.
ATTENTION: it is important that this value is regulated at the minimum necessary value
in function of the operations that we must carried out (recovery or stringing).
In particular, during the final regulation of the bull-wheels, it is necessary to raise the
pressure when we recover and lower it when we string: on the contrary, due to the
mechanical and hydraulic efficiency, with the same set pressure we will have very
different pulls back.
c. Gently move the control lever of the pump (table 1, pos. 4) towards downwards .
Now the machine is ready to work: if the tension is higher than the set working value, the machine
operates as tensioner. If the tension is lower than the set working value, the machine operates as
puller. The machine is completely automatic, for this reason when setting a pulling value, the machine
works as puller or as tensioner following the motions of the opposite machine.
ATTENTION: the red arrow of the dynamometer (table 1, pos. 1) has to be positioned at
a value higher than the one set with the knob
(table 1, pos. 6).
ATTENTION: after starting stringing operations, it is important not to turn the knob
(table 1, pos. 6). In fact, should the knob
be rotated while the machine is stringing, this
operation cancels the previous carried out calibration and the systems set on the new
values congruent with new position of the knob.
d. To stop the bull-wheels rotation, move the lever towards centre position (table 1, pos. 4).