I have had more problems with my Bernina 950. Having cured the timing in May I then had a broken cog in August. I then had a repeat of the looping of the threads underneath which then threw the timing out on the machine in the beginning of December.
I finally got to take the machine to my service man, 2 hour round trip, on Tuesday and he fixed the timing while I waited. He is puzzled as to why I having so much trouble with a Bernina.
So far he has only seen the machine alone and is now worried that my table mounted motor may be too big it's 2850 Revs per min. and he thinks this machine would be better with a motor that works at 1400.He thinks that the fast off the block start could be throwing the thread out of the tension discs. The other thing we haven't ruled out is the tension block it seems good in general use but he wants me to check if I can pull the thread through the tension discs when I get a birds nest underneath. Usually I am so wanting to unblock the machine that I haven't checked that, I hope I won't have to.
I love this machine when it works well but I am reluctant to spend yet again to change the motor, it will be the best part of 500 ?uros. Does anyone think it's really going to make a massive difference? I understand my service man's theory but is it just clutching at straws for reasons ?