Pfaff 786 cannot get the second needle to form a stitch
My three thread part of the machine works just fine, but when I got to use another needle (the second needle). The stitch gets all messed up. It won't form a stitch. I have changed needles and tried changing thread. Of course I have re threaded it according to book a number of times. Any help would be appreciated. taberk3@comcast. net
Re: pfaff 786 cannot get the second needle to form a...
Sorry to say I had the same prob and finally gave up on using 2 needles and 4 threads. Other than that I love the machine but will be replacing it soon due to inability to find replacement parts as it is sooo old. :(
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From my past sewing experience (not an industrial machine), the thread will shred if the needle/thread/fabric are incompatible. Could be the canvas is too coarse and is wearing on the thread like sandpaper. Remember, the thread/needle will penetrate over 10 times before that section of thread actually forms a stitch, so that's a lot of friction going on. In regular sewing, a top-stitch needle has a larger scarf which acts to protect the thread, however, not sure that is a choice for your machine.
Be sure to use a brand new needle. If the needle is bent or damaged, it will frequently skip stitches. Also, if you are using the incorrect needle for the fabric & thread you are using, it will skip stitches, ie a ball point needle on woven fabric. All About Needles
1. Make sure there is bobbin thread. 2. It is very important to have the bobbin thread with the right tension setting. This is done by hanging the bobbin carrier with the bobbin inserted from your finger. Bob it a little and it should extend one inch. If it doesn't extend then loosen the tension(counterclockwise) and opposite if it extends too far. 3. Afterwards insert the assembly and pull a couple inches of thread out. 4. Now, thread the top. 5. Adjust the tension to three. 6. Run three inches of thread under the foot and hold unto the thread. At the same time turn the crank towards you. When the needle goes under the plate and back up it should have the bobbin thread with it. Sometimes the first turn doesn't catch the bobbin thread so try a second time. If this doesn't work then change your needle just in case this is the problem. If this doesn't work you will need a repairman adjust the timing.
an all purpose foot which can straight stitch & zig zag is what I use with double needles when using double needles,,you thread the first needle the regular way,,then you add the second spool & thread the second needle the same way as the first
Unfortunately, this is most likely a computer board issue and there's just no way to predict if/when a board will go bad.
Your only option at this point is to take it to an authorized Pfaff dealer. If the person who serviced it was an authorized Pfaff tech, take it back to them. If not, do take it to a Pfaff dealer - non-Pfaff authorized techs are not trained on the machines.
Sorry I can't give you a simpler answer, but until this is corrected, your machine won't work properly.