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Ribbon shifts on the core while being loaded in the printer and "telescopes"
Ribbon shifts on the core while being loaded in the printer and "telescopes"
Explanation
Possible causes: ribbon wound too loosely during production
OR ribbon has been stored at low humidity (winter!!). The ribbon as such is still intact but the shrunk core easily slips out.
Help
Corrective action at loading: put pressure on the front end while sliding the reel onto the shaft