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Old 1st Dec 2019, 5:46 pm   #4
G6Tanuki
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Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 8,939
Default Re: Issue with an old Star LC-10 dot matrix printer

The "print-head-moves to right, moves back to the left" thing is a standard initialisation behaviour for many printers - it's setting a left-hand 'zero' position and checking that whatever mechanism is used to determine print-head-position [probably an optical-chopper wheel for the relative/incremental steps, and a diode/phototransistor for the absolute-left-hand-extreme] is working.

Given that you say you've not had this printer working before, I'd check for accumulated crud [fibres from paper, spiders-webs, general dust] in the printhead position-sensors. A quick blast with a compresed-aor-duster might help.
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