Tippmann Boss - Help With Timing Please

[Denster]

OK forget the top thread thing your explaination of what happened shows it has nothing to do with the problem. The needle foot should not pass into the shuttle area the front of it should catch on the needle plate and only the needle pass into the shuttle area. The hook needs to pass the needle at the flat scarf on the needle above the eye. I guess I am unclear as to whether you meant the needle foot passed in to the shuttle race area when you had the needle plate off or does it with it on. I should have mentioned that when checking clearance with the plate off you have to hold the needle foot up with your finger. If when you do that with the plate off and holding the needle foot up the hook should pass the needle at the flat scarf on the needle and that is where you look for the clearance. If when doing this the hook still passes below the eye then check to make sure your needle is the same length as the one you replaced. If it is shorter it will cause the hook to pass below the eye. You are using 794S needles I presume.

Just so we are on the same page here the hook passing the needle at the flat scarf is on the upstroke not the downstroke.

Edited September 30, 2012 by Denster

[Denster]

One other point regarding the nylon thread. Which I use also. You need to use care when winding your bobbins. If you wind them real fast with an electric drill the nylon likes to kink comming off the spool. If you wind one of those kinks onto the bobbin when you get to it things will feel rough and at best you will have a couple of nasty stitches and at worst break the bobbin thread.

[Dwight]

I had a similar experience a couple of years ago.

Turn your machine around, take off the back.

Up top is a steel round rod, . . . with a collar on it. That collar has to be 5/8 of an inch from the left side, . . . no more, . . . no less.

Somehow, mine had slipped, . . . it was about 3 inches to the right of correct position, . . . would not sew.

Ben and I talked on the phone, . . . finally wound up driving it up there, . . . he took the back off, . . . "Here's the problem"

May God bless,

Dwight