SSL2013 Report post Posted February 21, 2021 Hello you all ! I am owner of a Pfaff 491 industrial sewing machine with the folllowing problem: when stiching, the loop thats is build by the upper thread and is normally caught by the hook sometimes isnt staying in a 90 degree angle to the hook but turns backwards so that the hook misses the loop. This results in missed stich. https://youtu.be/aKOQkTJQ338 I made a video to show the problem. In case you have any ideas I would be very happy for suggestions. greetings ! ssl2013 Quote Share this post Link to post Share on other sites
Constabulary Report post Posted February 21, 2021 (edited) I guess you have removed the throat / needle plate, right? Is it the same with installed throat / needle plate? 1st guess is - wrong thread path. Why? Cause a thread loop also appears left of the needle (but that may be machine specific - not sure). Do you have a manual? Is the machine correctly threaded? Please show some pictures of your thread patch. 2nd guess - bad thread? What thread is it? I guess bonded nylon? Maybe try plain polyester thread. Edited February 21, 2021 by Constabulary Quote Share this post Link to post Share on other sites
