Missing The Loop

[catskin]

Wiz.

I am using Schmetz 230 leather point needles that Bob sent with the CB 4500 and 346 bonded nylon thread.

I have also tried 180 and 250 sizes all schmetz leather point.

Bob.

Where do you adjust the timing? I have examined this machine everywhere I can find and except for moving the needle bar up and down I can not find anywhere to change the timing. On the bottom every part has a pin through the shaft plus a set screw or so it seems to me.

As for foot pressure I have it as tight as it can go and still be able to turn it to lift the foot between stiches. I have tried adjusting the foot pressure to varying amounts.

Can you tell me what the reason is for the bevels of different sizes that are machined just behind the pickup point on the shuttle? I have 4 shuttles and the bevels are different on each. Has it something to do with which shuttle should be used with which needle and thread size?

[CowboyBob]

Ok, so the shafts are pinned,on the far right where the rod comes down to make the shuttle go back & forth sometimes this nut can loosen & the bolt can back out making play in the shaft.

[catskin]

Thanks Bob.

I will check all the bolts.

This being a bottom feed jump foot machine. After doing some more testing it seems like maybe the leather is getting pushed down into the slot where the feed dog goes and that is causeing the needle to deflect some times. Also will try to put the stop behind the foot so it works in sliding mode rather then jumpng mode. I am starting to think it has to do with how the foot and feed dog work together in gripping the leather or perhaps not holding it steady enough at the critical time.