1. Labels not die-cutting completely.
A. The cutting die may have a low spot or nick in it.
B. Paper liner too thin.
A. Return to factory to have die checked and reground.
B. Use only Sohn Paper Stocks.
2. Unit does not start.
A. No number on automatic counter.
A. Reset shut-off counter.
3. Label is too short.
A. Infeed tension incorrect.
B. Adhesive buildup in guides.
C. Pacer Roller not adjusted properly
A. Re-adjust pacer roller in or out.
B. Remove guide top plate and clean all parts.
C. Re-adjust pacer roller in or out.
4. Label is too long.
A. Infeed tension incorrect.
B. Rewind assembly pulling web too strongly.
A. Re-adjust tension nut on the unwind spindle.
B. Adjust or clean rewind assembly. Rewind only required
to take up paper slack as it is printed.
6. Blank spots on printed label.
A. Stickyback worn out.
B. Low spots in printing plate.
A. Replace stickyback.
B. Replace stickyback or shim individual low spots by
applying small pieces of transparent tape on cylinder
surface under the low spots.
7. Printed matter is squashed.
A. Too much pressure on print cylinder shaft.
B. Bubbles under stickyback when applied to print
cylinder.
A. Re-adjust die adjust screws using instructions on
Page 1.
B. Poke bubbles with sharp tool. Roll bubbles out from
under stickyback.
8. Ink does not dry properly.
A. Too much ink flow between ink roller and doctor blade.
B. Wrong type of ink.
C. Ink has lost its viscosity.
A. Turn down slightly on doctor blade adjustments until
correct amount of ink is obtained.
B. See Page 5.
C. If ink is too thick, add thinner. Do not overfill fountain. If
ink is too washed out, add more ink.
D. Use Sohn recommended paper.
10. Paper sticks to printing plate and wraps around shaft.
A. Ink has built up on printing plate and dried from
standing.
B. ink has lost its viscosity.
A. Maintain proper doctor blade adjustment. Clean excess
ink from printing plate before starting up.
B. Add thinner to ink.
11. Label appears shaded or streaky immediately upon
printing.
A. Ink roller is too smooth
B. Doctor blade worn out.
A. Submit ink roller for reconditioning.
B. Replace doctor blade.
5. Label length varies.
A. Combination of 3 & 4.
A. See 3 & 4.
9. Printing is slurred or smeared.
A. Too much infeed tension.
B. Pacer roller not driving paper through machine.
C. Too much ink on printing plate.
D. Ink has lost its viscosity.
A. Relieve tension until good printing is obtained.
B. Re-adjust pacer roller in or out.
C. Back out ink fountain, clean plate and re-ink.
D. If ink is too thick, add thinner. If ink has too much
thinner, add ink. Do not overfill fountain.
TROUBLE-SHOOTING GUIDE
PROBLEM
CAUSE
CURE
17
PREVENTIVE MAINTENANCE
Use regular motor oil (10w-30) on the following areas weekly:
1.Top hole in each bearing block on die.
2. Light film of oil on the bearers of the die.
Use regular automotive grease on the following areas monthly, clean and re-lube.
1. Die gears.
2. Anvil shaft gears.
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