Juki 158 Double needle thread

[Juki 158 Double needle thread]

We sew 400d nylon primarily.  Outside thread keep untwisting.  Using tex 135 left twist.  Any tips on how to solve this issue? thanks!

[juki 2810 help]

20 hours ago, Gregg From Keystone Sewing said:

Gregg, thanks so much buddy!  This was it!  Thanks for all the other help too guys!

[juki 2810 help]

been lurking here for some time.  we don't sew leather, but heavy goods.  Have an issue with a new juki 2810 single needle.  Employee pulled on material for some reason and needle bar is out of position.  its angled toward the operator.  in the attached pic, this is a good machine (right) and bad machine (left) side by side.  both are in needle bottom position.  how do i adjust this?  needle is hitting in front of feed dog.  supposed to go through hole in feed dog. waiting on call back from machine supplier.  thanks for any help!