I bought this overlocker/serger 2nd hand some time ago (4-5 years) it has been going okay until recently when the loopers have have taken to playing up randomly.
It was serviced about mid last year sometime, when the problem started I really cleaned out the nooks and crannies, oiled it, changed needle, and fiddled a little with the tensions, I didn't think it was a tension problem as when it was behaving the stitches were perfect, it would randomly throw loose loops, skip stitches, or one of the loops would break.
Are there any known problems with this model, or have I ended up with a previously poorly looked after one?