Need help with my Pfaff 18.8 longarm
by, 12-01-2013 at 08:00 AM (386 Views)
I have a Pfaff 18.8 longarm with Qbot which I have been using successfully for the past few years, it is the same as the Tin Lizzie 18LS and the Viking 18.8. I purchased this machine used and live 5 hours drive to the nearest Pfaff longarm dealer. There are also no Tin Lizzie dealers. My machine has an intermittent problem: the needle continues to go up and down when the " auto stitch" stops (the needle is also supposed to stop moving). It also does the same thing when I push " needle down", it is supposed to only go up and down once but continues until I turn off the power. My husband put in some substitute switches to see if that would help, it made no difference. Sometimes I stitch an entire quilt putting up with this and then it suddenly returns to normal function. It makes me think something is loose but there is no apparent cause. I have cleaned everything I can think of and unplugged and replugged all connections. We opened the power box and there is nothing apparently loose. Has anybody else had this problem? Do you know the solution? Any help would be appreciated.