Members NowhereMan01 Posted 8 hours ago Author Members Report Posted 8 hours ago On 9/3/2025 at 7:12 AM, CowboyBob said: Put the screw for the eccentric, marked S on the eccentric into the slot (or V on the shaft)once you get it pushed to the left where it belongs & tighten the screw should get it feeding again. Thanks! Although I don't see anything marked "S", there are 2 distinct screws on the eccentric that can be screwed into the slot. The first one I tried resulted in no stepping at all, but the other one seems to work, as it is now stepping, and the stitch length adjustment even seems to be within the correct range too. However, now the bobbin hook is not catching the thread, so I assume that something went out of alignment. Any hints/suggestions on what/how to adjust would be much appreciated. Quote
Contributing Member friquant Posted 8 hours ago Contributing Member Report Posted 8 hours ago 11 minutes ago, NowhereMan01 said: I don't see anything marked "S", there are 2 distinct screws on the eccentric that can be screwed into the slot. The first one I tried resulted in no stepping at all, but the other one seems to work You will want to get the correct set screw screwed into the groove in the shaft, as there are timing adjustments downstream of this that will be affected if this is incorrect. Typically there are two set screws, 90 degrees apart on the shaft. I can see the shaft has a groove in it. One of the set screws is meant to be tightened into the shaft groove (this screw often has a rounded tip that fits well into the groove). The other set screw is meant to be tightened against the regular face of the shaft. (this screw will likely have a flat tip) After you get that sorted, I would check that the clutch safety is engaged. And send us another video zoomed in on the needle and bobbin area, slow motion turn with the handwheel like four seconds or so per revolution. Quote friquant. Like a frequent, piquant flyer. Check out my blog: Choosing a Motor for your Industrial Sewing Machine
CowboyBob Posted 6 hours ago Report Posted 6 hours ago I think the clutch is kicked out,take the bobbin out,try pushing on the stitch length button ,turn the handwheel backwards until it goes into the slot,while holding the button down push the handwheel backwards until you hear a click or until it just won't turn anymore.This "should" get the clutch re-engaged. Quote Bob Kovar Toledo Industrial Sewing Machine Sales Ltd. 3631 Marine Rd Toledo,Ohio 43609 1-866-362-7397
Members NowhereMan01 Posted 3 hours ago Author Members Report Posted 3 hours ago I really appreciate all of the help and I feel like it is very close to being resolved, but it's not quite there yet. Apparently, I did have the wrong set screw engaged with the V slot, and I've now got the slightly-rounded one in the slot. I also did the clutch engagement trick, and I did not hear a significant click (as I saw/heard on a YouTube video), but it did seem to have a small bit of "give" when pushed with some force, so it might have been out. Yet, the issue persists... Here is another video of the bobbin area, with me turning the wheel by hand. LMK if any other view might be helpful. Quote
AlZilla Posted 2 hours ago Report Posted 2 hours ago Looking back through this thread, I don't see where you checked the hook timing. Did I miss that part? It seems to have started with the walking foot problem and progressed to not catching the bobbin thread. Quote “Those who can make you believe absurdities can make you commit atrocities.” - Voltaire “Republics decline into democracies and democracies degenerate into despotisms.” - Aristotle
Contributing Member friquant Posted 51 minutes ago Contributing Member Report Posted 51 minutes ago 2 hours ago, NowhereMan01 said: Here is another video of the bobbin area, with me turning the wheel by hand. LMK if any other view might be helpful. Closer, and much slower. 😉 With the machine moving at an even speed (a snail's pace) and never moving in reverse. And with the phone on its side (landscape) instead of up and down. Here is an example of close, slow videos from today: https://leatherworker.net/forum/topic/131845-pfaff-345-issues/ 2 hours ago, AlZilla said: Looking back through this thread, I don't see where you checked the hook timing. Did I miss that part? I agree with ALZilla. From your latest video, the hook is about 150 degrees ahead of where it should be. (Love those timing marks, so visible!) It would be ideal if you could master the art of tripping the safety clutch and then resetting it. Because there is no point in setting the hook timing unless the safety clutch has been re-engaged. While you're making friends with the safety clutch you could also adjust it so that it trips with less torque. That way you won't end up with the belt skipping time again the next time the hook gets bound up. "A" for persistence 🏆 Quote friquant. Like a frequent, piquant flyer. Check out my blog: Choosing a Motor for your Industrial Sewing Machine
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