Labeller Problems - Digi 700 Series Service Manual

LABELLER PROBLEMS

Label not applied on pack correctly.
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Position and function of applicator – adjustments to applicator will depend on applicator type fitted.
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Air pressure too high or too low
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Sub jet bar (blow bar) - check air holes are clean and in correct position, plus check strength of air
blast. (refer to servicing section)
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Check Label is fed out to correct position at the front edge of the thermal head
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Check Labels/backing paper is not fed over the front of sub jet bar.
Incorrect label feed.
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Correct label format / plu is selected for labels being used.
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Labels are feeding through gap sensor and are being read correctly by the sensor.
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Check free running rollers are free to turn and labels are fed through machine correctly.
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Check drive and pinch rollers are clean and set correctly.
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Sensitivity level of gap sensor – check in Service menu/labellers/adc & gap sensor.
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Label path is clean - check the yellow sheet (sheet AF) is free from label debris and is clean and not
damaged so labels have a smooth path to run into thermal head area, (2nd stage labeller).
No print.
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Label format is selected which has print
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Labels are thermal type
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Thermal head is locked down in position and adjusted correctly against the platen roller or wear strip
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Compressed air is connected and set correctly for head cylinder (Signature labeller)
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Thermal head is connected, if disconnected; turn power off machine before reconnecting.
(If disconnected should get Error 22)
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Possible failure of thermal head or labeller board.
Poor quality print
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Thermal head is clean
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Wear strip is clean, undamaged and in serviceable condition (2nd / Signature labellers)
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Platen roller is clean, undamaged and in serviceable condition (classic labeller / Signature labeller)
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Print speed is not too high for quality of label.
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Position of thermal head onto wear strip, 2nd / Signature labeller. (refer to servicing section)
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Position of thermal head on platen roller, classic / Signature labeller. (refer to servicing section)
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Air pressure of head onto wear strip / platen roller, Signature labeller (refer to servicing section)
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Pressure of thermal head onto platen roller, classic labeller (refer to servicing section)
No label produced when expected
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Pack is outside any weight limits set in the plu
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Pack is unstable over scale deck (check weight on screen, if red, pack is unstable)
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Pack has not been seen by sensors (infeed and scale)
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Re-call plu to ensure correct information is sent to labeller.
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Is conveyor speed too fast and/or print speed too slow? (Should get Error 11)
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Are there any error messages on screen when pack passes through?
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If error is shown, refer to error code list on following pages.
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If labeller has stopped communicating with console, power reset labeller board
HI, MI, WI-700 service manual - 7 – fault finding
7-5 Issue 9 04/2020