Installation Guide

16
SAWING
DEFECT CAUSES SOLUTION
Chipping on edge of sheet Feed rate is too fast Slow the feed rate
Teeth on blade are bent Check condition of blade so teeth
are correctly positioned
Vibration of stacked sheets Clamp sheets together tightly
Melting of acrylic Dull blade Sharpen blade
Feed rate is too slow Increase feed rate
Incorrect blade angle Blade angle should be parallel
to direction of travel
Stopping of sheet while sawing Material needs to move evenly
through saw
CEMENTING
DEFECT CAUSES SOLUTION
Crazing in machined edge Stress due to machining Make sure the tool is sharp,
of cemented joint check speed of tool, anneal parts
before cementing to reduce
pressure
Edge polishing Do not polish prior to cementing
Chemical attack by cement Change type of cement
Cloudy joints Excessive moisture Use slower evaporating solvent
Reduce environment humidity
Poor joint strength Bubbles Improve surface contact between
parts
Dry spots Use slower evaporative solvent
Extra solvent squeezing from Reduce clamping pressure
joint
Solvent action reduced because Warm solvent, increase room
of low ambient temperature temperature
MASKANTS
DEFECT CAUSES SOLUTION
Weak and brittle maskant Air bubbles in film Dilute slightly
Film not thoroughly dry Wait recommended drying time
Maskant film too thin Increase film thickness to 3-5
mils (10-12 mils wet)
Excessive adhesion Maskant film too thin Increase film thickness to 3-5
mils (10-12 mils wet)
Coating exposed to UV Do not store sprayed acrylic
outdoors
SPRAY PAINTING
DEFECT CAUSES SOLUTION
Poor adhesion Incorrect paint Use paints recommended for use
with acrylic sheet
Dirt or residue on sheet Clean surface before painting
Blotches of paint Static electricity Neutralize charges with ionizing
gun
Wipe with damp cloth
TROUBLE SHOOTING GUIDES