Techsew 5100 back stitch problems

[Wizcrafts]

I think you guys need to buy the narrow throat plate/feed dog from @RockyAussie

[ZacharyR]

I have one ordered! I hope that helps. 

Edited May 5, 2022 by ZacharyR

[RockyAussie]

Posted yesterday Zachary. The smallest leather point needle be it 794x4 Dia or Lr or S will only go down in size to 23. Anything less will be a fabric round point needle. If the leather is soft/spongy then it can be easy with a fabric needle for the thread to miss the hook due to the elastic nature of that leather. Try using the size 23 needle with the #92 thread instead as the holes don't show much on soft stuff generally. The tension will need to back out a few turn on top. With these very long needles a fine needle is super easy to deflect away from the hook with anything but the most practised hands doing the job. The hook spacing from the needle is generally set up for the larger needles and if you want to stick with the smaller threads then you may want to get a fine shim spacer that moves the hook closer to the needle. Ask the seller there first and if no luck get back to us. I am fairly sure Jess has some in stock. Question......are you using an open toe centre foot?

[Thescandall]

I love my 5100.. got the narrow dog and it’s a stitching machine now. Thing will poke holes in diamonds now. 

[ZacharyR]

RockyAussie I got the email that my package is headed my way!  I appreciate the information. I’m using an open toe presser foot but I haven’t had time to try it with the bigger needle yet. I’m hoping to experiment some more this weekend and see if I can figure it out. 

[shoepatcher]

i have at times put a machine in reverse to time it especially if it is missing stitches in reverse.  The Needle is in a different position in reverse.  Also, make sure your hook is as close as it can be to the needle without touching it.  If it is too far away from need, hook will miss the the loop and and that means a missed stitch.

glenn

[Wizcrafts]

I time my CB4500 with the stitch lever in the zero motion position. This is the recommended position for timing 441 type machines.

There is another factor that comes into play when using thin needles and thread with thin leather on a 441 clone. This factor is the check spring. Normally, one sets and forgets the check spring (or never changes it from how it was setup by the dealer). This usually works out for the best when you use thread sizes 207 and larger. It gets a tad iffy with #138 thread and can be disastrous with #92 or smaller thread. This is because the standard setup has a lot of tension on the check spring to control heavy thread during the take-up lever's downstroke. This heavy tension completely overpowers thin thread and can cause the loop to dissolve before pick off time. I would back off the check spring tension until it just drops all the way down to the bottom stopper The stopper itself should stop the downward motion when the spring is horizontal. It may have been set a little lower for heavy thread.

[RockyAussie]

1 hour ago, Wizcrafts said:

I time my CB4500 with the stitch lever in the zero motion position. This is the recommended position for timing 441 type machines.

There is another factor that comes into play when using thin needles and thread with thin leather on a 441 clone. This factor is the check spring. Normally, one sets and forgets the check spring (or never changes it from how it was setup by the dealer). This usually works out for the best when you use thread sizes 207 and larger. It gets a tad iffy with #138 thread and can be disastrous with #92 or smaller thread. This is because the standard setup has a lot of tension on the check spring to control heavy thread during the take-up lever's downstroke. This heavy tension completely overpowers thin thread and can cause the loop to dissolve before pick off time. I would back off the check spring tension until it just drops all the way down to the bottom stopper The stopper itself should stop the downward motion when the spring is horizontal. It may have been set a little lower for heavy thread.

Very good point there @Wizcrafts No accounting for experience and thank God and you we have this forum to help and gain assistance with these issues these days. Might have to have a look for some good  instructions on loosening the spring pressure on the check spring yet. Lets hope not for now.

 

On 5/6/2022 at 9:42 AM, Thescandall said:

I love my 5100.. got the narrow dog and it’s a stitching machine now. Thing will poke holes in diamonds now. 

Good to hear. Now tell me ...can you see any reason to change back to the standard set? I have not yet myself.

I get messages nearly every day asking me how much the narrow foot needle plate set costs and I will take this opportunity to say that due to different costs of postage around the world it differs but as most sell into the USA the cost all up is $110 US anywhere there. If you are after a set you can pm me on here and please leave me your full postal details and an email to send the invoice to and I will get back to you normally with in 24 hours or sooner. 

[Thescandall]

I have no reason to go back to the original set. It’s in a drawer somewhere now. I’m sewing from #69 thread to 277 and I know I can go bigger if need be. I noticed my 111w155 has a similar set of dog and plate style and I’m able to do the same work on my 5100 now. 

[Gymnast]

More things can cause skipped stitches. I remember a video by Uwe, on a Juki 441 class machine that can have a problem with skipped stitches in reverse. Perhaps it can help: