Juki Pro 2000/ferdco Question

[Dogface]

I've had this machine for at least ten years but just had it serviced recently. Now I have a problem with the stitches and can't figure out what's causing it. The top line looks great but the bobbin thread is always loose and has loops and snags here and there. I thought the top tension was too loose but some say the bobbing thread is too loose and I dunno how to tighten that.

Any ideas here....?

[RomanNose]

I have a love hate relationship with this machine. The last employee I taught how to use the machine had the same problem. The bobbin was placed in backwards, and once we switched that around the problem was solved. Give it a try. Do you have the manual for that machine? It is well worth buying.

[Anne Bonnys Locker]

Why is it I hear of so many people having a problem only after the machine is "serviced?

[Dogface]

Thanks for the replies. Yes I do have a manual and will check it for sure....especially the bobbin part. Is there any way to increase bobbin thread tension ?

[CowboyBob]

Looping on the bottom is the top thread.Either it isn't threaded correctly or it's to loose,make sure your going around the second tension on the side 1/1/2 x

[Wizcrafts]

There is a spring on the opening side of the pop open bobbin case. The bobbin thread goes backwards through a slit in the case, then under the opening in the spring and out. The spring is secured and adjusted by a screw on one end. There may also be a set screw inside a hole, just forward of the adjuster screw. You would have to loosen the stop screw to adjust the tension screw, then tighten it back to keep the tension from changing on its own.

I usually leave my stop screw just finger tight, so I can still change the bobbin tension screw as needed. I change thread sizes every day, so locking down the bobbin tension screw is more of a hassle than a benefit. The lock screw is more useful to folks who use just one size and brand of thread in the bobbin.

[Dogface]

Bob,

That's what I thought too. My wife, who is a seamstress, said it's the bobbin tension. I have the top thread on correctly...checked it many times...

[CowboyBob]

Have you tried to tighten the top tension any yet?

[Dogface]

Yes, I did a bit. Only way I know to do that on my machine is to run the thread thru more holes in that silver stick that's on top....I guess one could do an extra wrap on that set of wheels just below the take up gizmo on the end...

I still need to install that servo motor too...when sewing around complex curved it's hard to stay slow with the original system..I have to stop sometimes and that's when I get most of the loose loops on the bottom...

Edited December 19, 2012 by Dogface

[Trox]

When a mechanic do a service he/she has to sew the machine off, it is not enough to statically adjust the timing and other settings. I see that many have problems with machines after having them serviced, I would not pay for a job half done. I first seems like the bobbin tension is wrong, however it might be other reasons for this too.

My Pfaff machine acted just like you described it, some stitches was OK and other had loose loops on the bobbin side. The reason for this was wrong needle hook timing. Call the mechanic and complain, it should not be like this.

Trox