Magnum Venus Plastech HIS Troubleshooting Manual - Manual (Page 18)

Page 16
H.I.S. Troubleshooting Manual
Apply lubricating grease
liberally to spring and
interior of spring screw
before reassembling.
Coat needles with suitable
grease before replacing
trigger. Be sure trigger
stud and screw are tight
and trigger is riding free on
stud and stud shoulder.
Readjust trigger setting
before operating gun. Be
sure trigger does not hit
against band on catalyst
hose or resin hose fitting.
Broken Trigger Pulling trigger back further
than needle guides allow. Do not pull trigger back
this far. Use screw
adjustment on trigger
catch for correct
adjustment.
Do not apply more tension
to trigger than necessary
to activate needles.
CHAPTER 6:
Proper Chopper Adjustment Procedure
The following adjustments, when carefully made, will allow the chopper to perform
very well with any major manufacturer’s chopper roving (2 strands of glass are
normally recommended). Proper adjustments will assure uniformity to cut strand
and the longest possible life of the rubber roll and blades.
An understanding of the operation of the chopper operating design will help to clarify
the need for good chopper adjustment. The ribbon of glass is passed through
carbide rings in the roving guide where the restrictive action separates the strands
and starts the break down of the fiber. The strands are then passed over the idler
bearing at the nip point of the bearing and rubber roll with just enough compression
to lay them flat, side by side. The strand is then pulled by the pinch grip between the
rubber roll and blade rotor to the point of impact between the blade and the rubber
roll. The broken strands are then thrown from the chopper by the inertia created by
the velocity of the glass strands.
Chopper Adjustments: