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Posted
On 4/15/2018 at 5:27 PM, aaron8771 said:

 

I had this exact same problem making my GPS collars. I added the lube pot filled with silicone and the problem went away. Don't ask me what the problem was ( I suspect the thread was getting hot).

 

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Posted

I have to ask, does the needle hit the holes correctly.

In this situation I recomend to let the needle scarf be seen coming up and out of the leather piece totally. Stop then move lever to reverse stitch. 

Its just me arm chairing this so be patient, if thats not possible we can joke & laugh a bit first. 

 

Good day

Floyd

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Posted

My machine does this as well, especially with thinner leather.  If it is a nice project I leave the thread really long and hand stitch backwards to lock them in. 

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Posted

Floyd, holes do line up. 

Had needle point in leather. Put in reverse. Hand cranked back one complete stitch. Thread is caught around barrel.

Tried uploading pics. Tried.

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Posted

As that needle is coming up, try to time it with that take up lever on the side as it gets close to TDC. Then ease off the go pedal, hit the bell to let them know your hittin the reverse. 

Once the patterns get working you may find the needle can cut threads so sometimes it can really be a pain. 

Good day

Floyd

  • Moderator
Posted

Aaron, it could be that your timing is retarded a bit. Check it out by following these few steps...

  1. Sew a few stitches in the normal direction, to lock the thread into the leather. Use about 6 stitches per inch (spi)
  2. Hand wheel until the needle reaches BDC (bottom dead center) and begins to rise and the top thread loop is just being picked off by the tip of the hook, then stop.
  3. Visually check the position of the take-up lever. It should be near the bottom of its travel.
  4. Continue watching the take-up lever as you slowly hand wheel the machine a small amount. Stop when the take-up lever is at its BDC position.
  5. Now look at the bobbin case/shuttle and note the position of the top thread that is passing around the case.
  6. If the top end to hook timing is spot on, the top thread should be half way around the shuttle and bobbin case with the take-up at the BDC position.
  7. If the take-up has not yet reached BDC, the timing is retarded. If it has passed BDC and started up, it is advanced.
  8. If the above is the case, the hook position needs to be fine tuned one way or the other until the top thread is half way around the shuttle with the take-up at BDC.
  9. Your machine is probably more forgiving in normal direction sewing than in reverse. Also, the longer the stitch length, the more critical the static timing becomes.
  10. If you need to retime the hook, do so with the stitch length lever in the zero feed position (only moves up and down, about halfway between forward and reverse stitching)

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.

  • 2 months later...
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Posted

Hi. I set my machine according to Uwes video on you tube. I also realised the shuttle race spring screws need to be rather loose.Thread binds between shuttle and driver. after 5 years of struggle I finally have it right. 

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