Ferdco Super Bull / Cobra Class 4 Issue

[tagger609]

Recently purchased a ferdco which is similar to the class 4. Got it set up, finally got needles and thread in. Put it together and now the foot snaps backward opposed to a smooth motion and the thread appears to be fraying / breaking. Unsure where to start. I never messed with any settings. The foot does this with thread or without. I attached a youtube video of the issue.  it sounds terrible Help please !

 

 

Edited June 29, 2016 by tagger609

[MADMAX22]

Your center foot has the thread line bottom thing (forgot what its called), that is catching on your slotted plate hole. Put some  leather under it and see what it does. Dont run it "dry" like that if you can help it. 

Edited June 29, 2016 by MADMAX22

[Ken Nelson]

There should be a plate and bottom feed dog with this machine.   I think Max may be on to something.   I would also advise you not to run it dry.  HTH Ken

Edited June 29, 2016 by Ken Nelson

[MADMAX22]

Yeah hopefully he got the other sets that usually come with them, Ill admit what did come with his is pretty nice compared to some of the stuff I have on mine. 

 

His slotted plate is fine to run with the other parts its just he is using one of these  which is catching in the slotted plate groove.

[Wizcrafts]

Tagger609;

How did your machine end up with a Cobra style inside foot? They have the tab on the bottom that is designed to push down the leather in the stitch line. It is meant for the Cobra slotted plate which has a long, narrow slot. Your machine seems to have a shorter slot.

You can work around the problem until a replacement foot arrives by shortening the stitch length so the inside foot stops before the end of the slot. Or, grind off the bottom tab.

[CowboyBob]

Wiz,

Ferdco made the stitch groove foot years ago & they copied it from the old machines like the Champion or Landis.

They work pretty good going straight but leaves a lot of unwanted marking when turning corners.

[Wizcrafts]

Thanks Bob. I didn't know that Ferdinand made a foot with a bottom tab.

[tagger609]

I will try a new combination of feet with the slotted plate. See if it helps and will report back. Really appreciate the help. You guys are the best. 

[tagger609]

Ok so with leather under foot it is still a little jerky. Tried repositioning the plate with no luck. Here's how the stitch looks . better on top then bottom . bottom is frayed. Also is a picture with all feet and plates and the feed dog. Any suggestions of new setups. 

[Trox]

I use this set up too (with the Cobra style inside foot, slotted plate and Ferdco lower guide), but I never sew with no material in the machine. Ease up the presser foot pressure (so the presser do not hit the plate) or change the inside foot if you going to sew very thin material. Remember to hold both thread tight when locking down your stitches/ start and stop. To much presser foot pressure will make it hard for the needle to hit same holes on back tacking, you are using a sharp LR needle that will cut/fray the thread easily .

Tor