Machine not picking up bottom on every stitch (Consew 226)

[Dominover]

I'm using a size 90 needle.

I'm also using a 100% polyester thread (strong thread).  

The Consew 226 is Bobbinless.

My problem is that no matter what I do, I can't seem to fix this problem where my machine is not picking up the thread on the underside.

This only happens every now and then but it's an ongoing problem with a size 90 needle.  This has only started happening since I changed the needle down to a size 90 (because I'm using thinner thread).  I was using size 100 before.

I've adjusted the tension over several times and even pulled the tension knobs apart and cleaned them.  No grooves in the plates.

I have re-positioned the needle several times and still the problem exists.  

The needles are the right length and the right type.  I realize it has to do with the hookup underneath but I'm not sure how to correct it.

I'm no sewing guru and think there must be something I need to use when dropping the needle size to below 100.  That's just a guess.

Any clues as to why this might happen? 

Thanks

Edited March 18, 2018 by Dominover

[Colt W Knight]

Bonded polyester thread?
 

[Dominover]

It just says 100% polyester. Glitterman brand.

 

[brmax]

It may help if a thead size can be mentioned. Curiously!

Possibly using a micrometer if nothing labeled. In anycase the 14/90 needle list for use with V46 thread, and this has a typical measure of .0094”

Although you may well know if, the needle does slide down the thread very easy. It should be a large enough needle.  

Good day

Floyd

[Dominover]

You know, I suspected that it may be the case.

I'm not sure how thick this thread is but here is a pic of it.

There is 110 yards of thread on this reel.

 

 

 

Edited March 19, 2018 by Dominover

[Halitech]

that's upholstery thread. It's closer to a 46? or whatever the normal thread is for a household sewing machine. I've used it before in my brother machine and its great there for sewing jeans. But it's not really designed for heavier leather

[Dominover]

What sized needle would you use for this?  I just stepped up the needle size from a 90 to a size 100 and the skipping has gone away.  It seems that was the problem.

I would be interested in knowing what sized needle you would use for this though?

[Bugstruck]

Up way too late but it the machine is sewing okay with the 100 and up needle (if I have that right) but fails only with the 90 needle, with the same 46 thread, something is distorting the loop the hook is trying to catch with the smaller needle (stating the obvious). I assume heavier thread and larger needles are working but not sure you mentioned what thread you are using with the 100 needle. With a 100, what  weight thread are you using?  That photo looks like 46 or less.  Don't know anything about the 226 and don't understand "bobbinless" and at that 46 weight I don't think you mean pre-wound but perhaps.

[Dominover]

I have no idea how thick the thread is, but at the store it was sold as upholstery thread 100% polyester.  Extra strong.

I'm using the same thread with a size 100 needle as I was with the size 90 needle. 

Here's a link to the thread I bought.

 

https://www.spotlightstores.com/sewing-fabrics/haberdashery/sewing-threads/gutermann-extra-strong-thread/p/BP80055520-000

 

 

Edited March 19, 2018 by Dominover

[Bugstruck]

Not sure the weight of that thread but I would guess 69/Tex 70 if it works with a 100/16 needle. The smaller  eye on that 90 needle is restricting the thread movenent and keeping the loop from fully forming/developing as was noted. Thread and needles are best matched using a chart like this.

http://www.tolindsewmach.com/thread-chart.html

If you web search "leatherworker and consew 226 needle" you should get better info than using the search engine here. It will bring you right back here in most instances. There is a better search string method but you don't need.