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Users Manual Model 656/636 Mechanical Trouble Shooting • 55
Ink
Problem Probable Cause Corrective Action
Ink wrinkles or will not pull
smoothly.
1) Incorrect adjustment of unwind
roller brake resistance.
1) Adjust knurled knob clockwise as
far as possible without breaking
ink or stalling ink motor. Do not
bottom adjustment knob.
Replacement of fiber brake disc
may be required if printer has
high hours.
2) Unwind roller and ink take-up
roller misaligned.
2) Align rear edge of ink with rear of
print area (allow approximately
1/8" (3mm) overlap). Loosen
thumb cap screw on ink out
sensor mount plate and adjust
until it touches rear of ink roll on
unwind arbor. Lock slide rewind
core toward rear of printer until it
just contacts plate.
3) Ink buildup on turn bar(s). 3) Clean with alcohol.
4) Incorrect ink width. 4) Use an ink width no wider than
stock being printed. This is
especially critical when using a
narrow web with cut down
rollers.
Ink rolls loosely on take-up roller. 1) Take-up roller not turning. 1) Check that roller swing arm (rear
of printer) is not binding and
Roundthane™ belt is not broken
or slips excessively.
2) Take-up core binding on locator
plate.
2) Move core .015" - .030" (.38mm -
.76mm) away from plate.
3) Take-up core not contacting ink
drive roller.
3) Assure that take-up roll is not
binding on locator plate and
swing arm moves freely.
4) Take-up roller too full. 4) Remove used ink roll. It is
designed to hold only 1 full roll.