Avery Dennison SNAP 656 - Manual (Page 58)

52B • •• • Mechanical Trouble Shooting Users Manual Model 656/636
Mechanical Trouble Shooting
Stock
Problem Probable Cause Corrective Action
Stock will not roll or jumps 1) Incorrect adjustment of unwind
web guides
1) Be sure stock roll is as flat as possible and does
not extend over core.
2) Adjust unwind knob until back plate and front
post touch roll. Do not over-tighten. Roll must
rotate smoothly.
3) Adjust turn-bar collars to same position as
unwind back plate and front post.
Printer fails to stop at end
of roll.
1) Stock roll is too tight in guides. 1) Adjust unwind knob until back plate and front
post touch roll. Do not over-tighten. Roll must
rotate smoothly.
Stock does not pull
smoothly through
printhead module.
1) Turn bar collars too tight. 1) Adjust turn-bar collars to same position as
unwind back plate and front post.
2) Stock is slipping in drive or drive
pressure is uneven.
1) Be sure cam lift knob is closed. Be sure springs
are not improperly installed on bottom pins. Be
sure cam lift surfaces are not holding lift arms up
when knob is in the run position. Re-adjust
unwind and collars to relieve possible stock
“pinch”.