UBI EasyCoder 501 SA, Руководство по обслуживанию

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UBI EasyCoder 501 – Service Manual
35
7. TRANSFER RIBBON MECHANISM
7.1
Description
Continued!
7.2
Ribbon Unwind Unit
The thermal transfer ribbon mechanism is standard, but can be
omitted on special order. The mechanism consists of three main
units:
• Ribbon unwind unit
• Ribbon rewind unit
• Ribbon-end sensor
The ribbon unwind unit is used to accommodate the fresh supply of
thermal transfer ribbon. Only original transfer ribbon from UBI
must be used (else the warranty will be invalidated).
The unit is designed to keep the ribbon tight all the time in order to
avoid wrinkling, which would ruin the printout. It consists of a shaft
on which a spool is fitted. The spool can pivot
±
1.3º on the shaft and
the spool can be moved sideways.
It is most important that the pivoting point of the spool is centred in
relation to the ribbon width. Therefore, the shaft is provided with six
grooves which correspond to the standard widths of UBI transfer
ribbons (see table to the left). By compressing the spool, its snap-
lock will disengage from the presently engaged groove and it can
be moved sideways to another position. Make sure that the snap-
lock has engaged a groove by trying to move the bobbin without
compressing it.
Ribbons with a width less than 60 mm (2.36") can be used provided
they are wound on a core with a width of at least 45 mm (1.77").
Ribbon Width Position (groove)
≤
60 mm (2.36") 1:st (innermost)
88-90 mm (3.5") 2:nd
110 mm (4.3") 3:rd
– 4:th
– 5:th
– 6:th (outermost)