Quote
PierreB
[*] I seem to be having an intermittent problem with the motor/spool at the rear of the printer. I think it might be that the set screw in the spool keeps working itself loose so the motor shaft is spinning freely inside even though I tightened the setscrew a decent amount. I tried running a 7 hour print two nights ago and happened to have a time lapse video of the failure: [vimeo.com] Maybe it's time for some Loctite?
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You could use an Aluminum Filament Drive Spool
[www.amazon.com]
Printed spools are not perfect, the radius is never exact. It is difficult to push the fishing line throught the 2mm holes ans as you described it becomes loose with the time. But an Aluminum Filament Drive Spool costs money, shipping costs and time.
For these reasons, I am using normal GT2 belts and pulleys.