Cobra Class 4 Tension

[Klover]

Hello!

My Cobra Class 4 just arrived. First machine, and I'm trying to get the tension right. Will usually be sewing 5-6 oz - 10-12 oz, so I'm hoping to hit the right tension that can be used for most of my projects so that I don't have to mess with it too much. Will probably stick to 277 bonded nylon thread. 

The top stitch looks okay for the moemnt, but the bottom stitch looks whacky. Should I loosen the bobbin/bottom tension a little bit? 

All I've done so far is loosen the top tension about 1 full turn (achieved through small increments). I turned both top tension knobs.

[CdK]

@RockyAussie << @Klovermade some tests and posted images/video where he tested the tension for both the top and bottom thread when his machine was in balance. I seem to recall that the bottom was 1lb and the top 3lb.

That being said, the thread path plays an important role as well. My preference, based on my experience, is to make sure that the top thread is wound 1 1/2 to 2 1/2 times around the tensioner on the left side of the machine. Thread slippage needs to be minimal here, wheel needs to rotate, or I get inconsistent stitch tension. There is no standard or correct one side fits all on these machines. Thread types and thickness change how you set up as well.

Good luck with your new machine.

Edited 15 hours ago by CdK
Missing userid

[Klover]

19 minutes ago, CdK said:

@RockyAussie << @Klovermade some tests and posted images/video where he tested the tension for both the top and bottom thread when his machine was in balance. I seem to recall that the bottom was 1lb and the top 3lb.

That being said, the thread path plays an important role as well. My preference, based on my experience, is to make sure that the top thread is wound 1 1/2 to 2 1/2 times around the tensioner on the left side of the machine. Thread slippage needs to be minimal here, wheel needs to rotate, or I get inconsistent stitch tension. There is no standard or correct one side fits all on these machines. Thread types and thickness change how you set up as well.

Good luck with your new machine.

Thank you for the input! I'll definitely check out those images/videos. And thank you for mentioning the thread slippage. I hadn't even thought about that, but I will keep it in mind! 

[CdK]

@KloverI found the thread where this was discussed. This link should take you to the page where the hammers are shown: