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Showing results for tags 'pressure'.
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oclack posted a topic in Leather Sewing MachinesHowdy, I'm wracking my brain trying to figure out why my Pfaff 335 is marking my leather, especially at the start of a stitch line where I backtack. I've attempted to lighten the pressure of the presser-feet by backing off the knurled nob at the top of the machine, to the point it is barely hanging on to the machine, but it doesn't seem to have much of an impact. The inner presser foot seems to be fine, but the out foot is an issue. I've even placed my finger under the presser foot (machine off and needle out of course) to see if I can feel any difference in the pressure bing applied... I'm not sure what it should feel like, but its heavy. Seems like the the top pressure is not being affected by loosening the knob on top. That said, I haven't a clue what I'm doing. I've included a few picture to show how loose the top knob is, the position of the presser feet (they seem a bit canted to the left) and the marks being left on the leather. BTW... I'm stitching 3-4oz harness leather from Wicket & Craig. Any ideas whats going on here?
Sometimes when I'm sewing through several layers of waxed canvas, a few stitches in from the starting edge, the trailing work edge will hang up at the rear of the needle plate's nfeed dog slot. All forward movement of the material stops and stitches pile up. If I can get the material to move just a little bit more, the trailing edge gets past the rear of the slot and doesn't catch there any more. Is this caused by too much presser foot pressure? Picture attached.