Cb4500 tension

[Parott1]

Black 277 top and 207 bottom the brand is cowboy 

[Dominicff]

Anybody have a chart about what thread size on top would fit with a different size on the bottom. ? Thanks. 

[Parott1]

The first pic is the top side of the stitch. Forward is the top with the tail and the bottom is reverse. 

The second pic is the bottom side of the stitches.  Top is forward and bottom reverse. 

As you can see the bottom stitch is slightly smaller and the bottom side of reverse looks like it just runs on

[SolarLeatherMachines]

Can't see anything in those pics, especially with black thread.  

Was thinking about it this morning.  Are you still using the S point? 

[Parott1]

Sorry for the poor quality pic.  Yes I'm still using the s point.  Biothanes website recommends a round point in either #25 or 26

[SolarLeatherMachines]

I think a previous poster mentioned that the S point allows the hole to close very quickly.  That, combined with the black cowboy thread, which is very stiff, is probably causing the issue.  If you can try a softer style of thread on the bottom, that might do it....and it wouldn't hurt to use the recommended needle.  

[Wizcrafts]

1 hour ago, Parott1 said:

Sorry for the poor quality pic.  Yes I'm still using the s point.  Biothanes website recommends a round point in either #25 or 26

Stop wasting your time. You are not going to get a good stitch in Biothane with an S point needle! Order a pack each of round point needles (System 7x3) in sizes 25 and 26 and be done with it.

[Parott1]

That's what I'm going to do.  After much wasted material and few gray hairs.... 

 

thanks to to everyone who responded