Help needed with hand crank cobbler machine!

[LK1]

On 1/22/2021 at 4:14 AM, Frodo said:

OK guys,  I am going to try and tell you how to get your machines working

 

go to this link here

How To Thread & Set The Timing On Your Chinese Sewing Machine - YouTube

if you have questions after seeing this,  i can help you,  i am not on this forum every day.,   pm me

 

if it is the needle, put your finger under the machine, roll the crank, the neddle should tap your finger with out cutting you. 

if you do not feel the needle, it needs to be lowered, if it draws blood it is to long and the needle bar needs to go up

 

This keeps on happening? As if the thread from the needle is trapping or catching and literally stops the machine from being cranked, What would I do to try and fix this? The thread sticking out the side of the bobbin in just loose thread thats come from the needle not the bobbin, it seems the bobbins thread is fine now

[Frodo]

PM SENT

 

[kgg]

In your photo showing the bobbin. A couple of things I would check:

When the needle picks up the thread through the bobbin cover. Can you pull the bobbin thread from the bobbin easily? Looking at the photo it appears the top thread has been stressed to the breaking point. I suspect the bobbin isn't threaded correctly. Thin thread (V69) should be threaded so it exits through the hole closest to the hook. Make sure the bobbin thread path through the hook assembly is correct. Goes through the bottom hole closest to the hook, under the tension spring and out the top hole closest to the hook. The thread has to enter one hole and exit the corresponding top hole.

kgg

Edited January 23, 2021 by kgg
word error

[Frodo]

LK,  Look at 10:40  

How To Thread & Set The Timing On Your Chinese Sewing Machine - YouTube

 

in order to set the bobbin hook exactly where you want, loosen the pitman rod nuts and adjust the hook 

 

[LK1]

On 1/23/2021 at 4:48 PM, kgg said:

In your photo showing the bobbin. A couple of things I would check:

When the needle picks up the thread through the bobbin cover. Can you pull the bobbin thread from the bobbin easily? Looking at the photo it appears the top thread has been stressed to the breaking point. I suspect the bobbin isn't threaded correctly. Thin thread (V69) should be threaded so it exits through the hole closest to the hook. Make sure the bobbin thread path through the hook assembly is correct. Goes through the bottom hole closest to the hook, under the tension spring and out the top hole closest to the hook. The thread has to enter one hole and exit the corresponding top hole.

kgg

So should I change the enter and exit holes? The thread I’m using is T70#69 Bonded Nylon, and I haven’t had the bobbin tension down incase of it being too tight, here’s some pictures of the bobbin line

23 hours ago, Frodo said:

LK,  Look at 10:40  

How To Thread & Set The Timing On Your Chinese Sewing Machine - YouTube

 

in order to set the bobbin hook exactly where you want, loosen the pitman rod nuts and adjust the hook 

 

Watching now, thanks so much again @Frodo!

[LK1]

On 1/23/2021 at 4:48 PM, kgg said:

In your photo showing the bobbin. A couple of things I would check:

When the needle picks up the thread through the bobbin cover. Can you pull the bobbin thread from the bobbin easily? Looking at the photo it appears the top thread has been stressed to the breaking point. I suspect the bobbin isn't threaded correctly. Thin thread (V69) should be threaded so it exits through the hole closest to the hook. Make sure the bobbin thread path through the hook assembly is correct. Goes through the bottom hole closest to the hook, under the tension spring and out the top hole closest to the hook. The thread has to enter one hole and exit the corresponding top hole.

kgg

Also yes I’ve just set up again from scratch after changing the pitman rods, and taking the loop for the bobbin line to come through was easy and just pulled right out?this was using the holes on the right though like the pictures above

[LK1]

It’s either this problem or the needle going in and shredding it somewhere down at the bottom, I’ve tried the pitman rods made sure that’s all even and correct, just tried changing the bobbin holes closer to the hook and still nothing

[LK1]

24 minutes ago, LK1 said:

It’s either this problem or the needle going in and shredding it somewhere down at the bottom, I’ve tried the pitman rods made sure that’s all even and correct, just tried changing the bobbin holes closer to the hook and still nothing

Success!! 
Ive just had it doing running stitches fast and slow through 3 different types and thickness of leather and material, all without snapping or having any hiccup! 
I don’t want to get too ahead of myself but since the initial set up I’ve not had it this dialled in until now! All with great thanks to the leatherwork community and especially @Frodo! @kgg And the others that have been willing to help! I’ll be back tomorrow after I’ve started a few projects that have been on hold and let you guys know how the machine and the leatherwork is going! Again it’s much appreciated for all the help guys, I’ll keep this post live for anyone else with similar issues, and hopefully I won’t be back with bad news! Thanks again guys!

[Frodo]

 

the needle MUST go down Then the hook sweeps in front of the hook grabbing the thread  on the NEXT revolution

when the needle comes up it MUST come up in the corner opposite the hook

Also..what needle size and thread size are you using?  incorrect needle will cut thread also

 

 

[Frodo]