Members Romana Posted Saturday at 08:08 PM Members Report Posted Saturday at 08:08 PM (edited) Hello. Could someone please help me with some advice on why the lower thread goes up in the middle (red) and not on the left (blue) on my Pfaff 335? The photo of the hook is from the internet, I just needed to read the points. Edited Saturday at 08:10 PM by Romana Quote
Contributing Member friquant Posted Saturday at 08:59 PM Contributing Member Report Posted Saturday at 08:59 PM Are you having trouble getting the machine to stitch properly, or are you asking about the fundamentals of how a sewing machine forms stitches? If the former, I suggest making a close-up video with the bobbin cover removed, while you turn the hand wheel VERY slowly and smoothly. Here is a great example of such a video: Quote friquant. Like a frequent, piquant flyer. Check out my blog: Choosing a Motor for your Industrial Sewing Machine
Members Romana Posted Saturday at 09:12 PM Author Members Report Posted Saturday at 09:12 PM I can't even record a video to make it look good. What I mean is that the machine sews well for a while and then seems to jerk in places. I attributed it to the lower bobbin thread coming out in the middle. Quote
Members Romana Posted Saturday at 09:14 PM Author Members Report Posted Saturday at 09:14 PM Here the lower thread goes correctly, but after a while it jumps to the middle Quote
Contributing Member friquant Posted Saturday at 10:28 PM Contributing Member Report Posted Saturday at 10:28 PM Does it jump to the middle when going in reverse? After it jumps to the middle, does it ever revert to its former position? When the lower thread is in the middle, does it interfere with the top thread clearing the bobbin case latch? Quote friquant. Like a frequent, piquant flyer. Check out my blog: Choosing a Motor for your Industrial Sewing Machine
Contributing Member friquant Posted Saturday at 10:58 PM Contributing Member Report Posted Saturday at 10:58 PM Which direction is your bobbin inserted? Here is a screenshot of the pfaff 335 manual showing the correct orientation. If inserted the opposite direction, the thread can slide out of the bobbin tensioner, which is bad. Quote friquant. Like a frequent, piquant flyer. Check out my blog: Choosing a Motor for your Industrial Sewing Machine
Members Romana Posted yesterday at 12:38 AM Author Members Report Posted yesterday at 12:38 AM sometimes it jumps back, but mostly it stays in the middle. The twitches are only when the thread is in the middle Quote
Moderator Wizcrafts Posted yesterday at 05:51 AM Moderator Report Posted yesterday at 05:51 AM 5 hours ago, Romana said: sometimes it jumps back, but mostly it stays in the middle. The twitches are only when the thread is in the middle Try reversing the direction of the bobbin. It may need to go in opposite to the way you already inserted it. I usually insert bobbins so that the thread makes are sharp turn backwards towards the slot leading to the bobbin tension spring. This back force tends to keep the bobbin thread well placed under that spring leading to more reliable stitches. Quote Posted IMHO, by Wiz My current crop of sewing machines: Cowboy CB4500, Singer 107w3, Singer 139w109, Singer 168G101, Singer 29k71, Singer 31-15, Singer 111w103, Singer 211G156, Adler 30-7 on power stand, Techsew 2700, Fortuna power skiver and a Pfaff 4 thread 2 needle serger.
Members Michiel Posted 16 hours ago Members Report Posted 16 hours ago I have had similar issues with a adler 69 (which is very like your machine) in my case my check-spring which was not working properly , after i fixed that it was solved Quote
Members Romana Posted 14 hours ago Author Members Report Posted 14 hours ago I tried three different spool cases and it's still the same, but I'll try turning it again. ☺️❤️ Quote
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