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Users Manual Model 656/636 Mechanical Trouble Shooting • 59
Mechanical Trouble Shooting Sequence
If the printer is electrically operable, proceed as follows:
1) Open printhead and drive pressure roller and remove stock.
2) Adjust unwind inner web guide to 31/32" (24.6mm) per instructions (See
Printer Operation - Web Guide Adjustment).
3) Take a short (2-3") (50-75mm) piece of stock you wish to run and adjust the drive
module pressure per instructions (See
Maintenance / Adjustments - Stock
Feed Adjustments).
4) Rethread machine, close drive module pressure handle. Close print module.
Release pressure on printhead adjustment knobs. Operate printer and fine tune
drive module pressure until web tracks at 31/32" (24.6mm) from back edge to
center frame.
5) Open drive pressure module, remove stock and ink and readjust print module
pressure per instructions (See
Maintenance / Adjustments - Print Head
Adjustments).
6) Reinstall stock and ink, operate and make any further adjustments (sense-mark,
stock-out arm, stacker etc) per trouble shooting section of manual.
Lubrication Procedure
General
The 636 / 656 series printers are factory equipped with either composition bearings
not requiring lubrication or pre-lubricated bronze bearings. The one exception is the
rub cams on either end of the rotary knife. Periodic cleaning of the printer and
removal of dust will greatly enhance the length of the time the printer will function.
Cam - Lubrication Procedure
1) Clean dust and residue from cams (using alcohol or other suitable solvent) daily,
or approximately every 100K cuts. Use any good quality general purpose grease
(not oil). Apply with cotton swab or other non-metallic device.
2) If lubrication is omitted, knife will squeak and draw attention to required
lubrication.
Composition (Iglide) Bearings
1) If field replacement of an assembly fitted with an Iglide bearing is performed, a
single drop of spindle oil should be applied to assist in bearing break-in.
2) If, after long use, an Iglide bearing starts to "squeak", disassemble the component
containing the bearing and lightly abrade the shaft surface. Clean the bearing
(dust or old oil) with alcohol, re lubricate with 1 drop of light oil and reassemble.
No other printer lubrication should be required in normal use.