HighTex CB243 help needed

[Damas]

Hello,

I bought a second hand HighTex CB243 which I believe is a Juki TNU-243 clone. The machine stiches great, timing seems OK but I keep braking needles again and again... At a point where I am reluctant to use the machine

It looks like either feed dog, either needle bar is off and I believe this to be the origin of my braking needle issue...

I looked into TNU-243 service manual because machine did not come with any manual and it does not show how to move from left to right the feed dog or the needle bar.

 

[CowboyBob]

Here's how to adjust needle to shuttle clearance

441 needle to shuttle clearance adjustment.pdf

441 Engineers manual.pdf

Edited 8 hours ago by CowboyBob

[Damas]

Hello CowboyBob, thank you very much for this documentation. The needle to shuttle clearance seems fine, I believe the needle to hit the feed dog, as I can clearly see impact marks on the feed dog and also if you check on picture you can see that needle is too much on the left when going through feed dog hole

Also, mine being a flat bed version, so I believe adjustments will involve parts that might differ

Edited 7 hours ago by Damas

[AlZilla]

2 hours ago, Damas said:

Hello CowboyBob, thank you very much for this documentation. The needle to shuttle clearance seems fine, I believe the needle to hit the feed dog, as I can clearly see impact marks on the feed dog and also if you check on picture you can see that needle is too much on the left when going through feed dog hole

Also, mine being a flat bed version, so I believe adjustments will involve parts that might differ

I can't speak to parts differences, but moving the needle is moving the whole needle. Away from or closer to everything on either side.

[Damas]

Yes, that's the point. I need either to move needle bar or feed dog, depending on what is ajustable on this machine to have everything in line

I just don't know how to do that.

This is why I came here and asked

[nejcek74]

On my machine (Pfaff) you set the needle into the centre of needle hole in the feed dog by moving the needle bar frame. This is the upper assembly that includes needle bar and upper feed mechanism. By my machines is always annoying to get some movements. How is this solved by Juki I rerally don't know.

check on which axe the needle bar is hanging, is there and screw that you can loose, and than by rocking the wheel you push the whole assembly slightly to the left.

[friquant]

Here a link to a manual for a Juki 243: https://www.manualslib.com/manual/1638502/Juki-Tnu-243.html

Section 21 (pages 10 and 11) discusses adjusting the feed dog to needle relationship.

[AlZilla]

1 hour ago, Damas said:

Yes, that's the point. I need either to move needle bar or feed dog, depending on what is ajustable on this machine to have everything in line

I just don't know how to do that.

This is why I came here and asked

There shouldn't be any lateral adjustment on the feed dog because it would then rub/hit the needle plate.  The needle should be centered in the foot and needle plate.