Polychem GP44, Operation And Maintenance Manual

Page: 25 / 105

GP44 Semi-Automatic Strapping Machine
OPERATION - 25-
the strap.
Sluggish Feed Grippers are not
returning properly due
to lack of grease Grease grippers and replace. Check for foreign
mater that may also be impeding gripper
movement.
X
Hard Feed -
escaping track Feed bearing shaft is
bottoming out on the
Solenoid plunger and
not allowing the spring
to come into play Adjust feed solenoid per procedure
X
Hard Feed -
escaping track Spring pressure on
feed solenoid too much Decrease spring pressure on feed solenoid.
Check to make sure the spring is the proper type
X
Short Feed There is an obstruction
in the strap path Inspect strap path, guides, grippers and arch for
debris and obstructions. Make sure grippers are
returning to home position. Check all guides
have adequate clearance. Look for damaged
arch track. Determine point where strap is
stopping and start searching there.
X
Short Feed Too much strap or too
little strap in the
accumulator Adjust sensor spring in the accumulator. Make
sure the accumulator feed roller/motor are
working properly and adding strap to the
accumulator. Make sure the sensors detecting
the amount of strap entering the accumulator
(retract wheel and accumulator feed wheel) are
functioning properly. Make sure the parameters
in the PLC program are set properly. Check for
adequate spring tension on the initial feed
rollers. On MR machines check clutch on
accumulator fill roller.
X
Short Feed The strap is not
removing from the reel
properly Correct the strap reel installation and strap
threading. Correct any knots or tangles.
X
Short Feed The strap is getting
damaged during the
cutting and/or
tensioning cycle. See Weld and Cut and Tensioning section
X
Short Feed Poor quality strap
(camber) Replace with another roll of strap
X
Short Feed High tension wheel is
damaging the strap and
creating a weak point in
the strap. Make sure the slip clutch is on the high tension
wheel is slipping 1/4 – 1/3 turn during high
tension cycle.