When the machine executes a trim the silver knife swings out from under the small black piece which has the SWF logo engraved on it, the silver knife then collects the upper thread and the bobbin thread and pushes it under the black piece which does all the trimming.
Remove the needle plates from the machine and you will find that under those needle plates are your knives for your trimmer.
Let me explain how your trimming system works, that way you will have a better understanding how to correct this. One or two possibilities caused this.ġ) You had a birds nest occur on one of the heads and when the knife tried to do a trim, the silver knife under the needle plate was able to fully open and then could not go back under the black piece.Ģ) Grease has accumulated on the plunger and will not recess back to its original position to be able to fire again on the next trim command.Īll of the heads on a Multi Head Machines trimming assembly are connected together and are not independent. Why is thread not trimming on my multi head?Īn Error 103 indicates that the knives did not return to their start position.