Presto Conti Compact Series Operating And Maintenance Instructions Manual page 66

PRESTO
GmbH & Co. KG
Bad Laer
• Let the press ram run forward or
backward several times in the operation
mode "Manual". See to it that neither
pressure fluctuations can be seen at the
pressure gauge (44) nor seizing marks are
visible at the upper side of the press ram.
• Stop the unit, if the above described
signs occur.
• Repeat adjustment works if necessary.
Prior to starting with the maintenance
works first see to safe working
conditions, see first section of this
maintenance point.
When compressing plastic foil the
cutting clearance has to be as small as
possible. Initial pressures of approx. 150 bar
during the return stroke indicate a jamming
by pulled along foil resulting from an
excessive cutting clearance. A too big cutting
clearance (>2mm) in connection with blunt
cutting edges (edge radius >0,5mm) and
appropriate material behaviour (e.g. foils,
PET o.s.) results in vertical force introductions
into the housing structure which could add a
multiple of the thrust of the pressing ram.
Thus severe damages (cracks, permanent
deformations) can be caused.
Drilling/cutting device, check chain tension
and lubricate chain (in case of fully automatic
only)
• Open cover in order to make the chain
drive accessible.
•
Measure the totally remaining range of
spring of the disk spring package at the
chain tensioner (60). The value may be 5
mm as a maximum. The chain tension has
to be adjusted as required.
• Turn the nut clockwise or anti-clockwise
until the measured value is less than 5
mm.
• Provide chain with a commercial quality
chain spray type lubricant on this
occasion.
• Properly close cover again.
04/2012 7 - 12
Prior to starting with this
work put main switch into
"0" position and secure with
a padlock.
60