Pfaff 545-H3-6/0 CLPMN

[Elcheatobandito]

Hey. I've got a Pfaff machine that I've had cleaned, and tuned up, by a professional. Recently, I had a gigantic rats nest form in the drop in bobbin assembly, and when trying to untangle the problem, took apart more than I needed to. I put it back together, but now it's not sewing. I can get the hook to catch the needle thread, and I can pick up the bobbin thread, but actually sewing results in nothing but a stuck machine, and a rats nest forming in the bobbin case. Any help would be appreciated. I've included pics in case someone can immediately diagnose the problem.

[fibersport]

First check your safety clutch to see if it's been tripped.  Are you trying to run it with the bobbin cover off?  With the Pfaff, you have to have the cover over the bobbin completely closed.

[CowboyBob]

When you put the needle plate back on make sure the little tab of the bobbincase is in the slot of the needle plate which is @ the 9:00 position.Also make sure it's threaded correctly & that you have enough tension & hold on the the needle thread for the 1st 3-4 stitches.

[Uwe]

Also keep in mind that with this type of machine, you have to hold the top and bottom thread for the first few stitches to avoid a bird’s nest. If the hook catches the loop, you can’t be too far off. 

Here’s a picture of how to hold the thread when you start sewing:

 

Here’s how to check the safety clutch and reset it on the Pfaff 545. 

Here’s how to install the bobbin using the bobbin cap:

 

 

 

Edited February 15 by Uwe

[Elcheatobandito]

Thanks for the tips guys.

I made sure my clutch wasn't engaged, made sure everything was nice and tight, and held on to the threads. Still had issues, but only when my machine was ran at speed. When I was hand turning the wheel, it sewed no problem. I took the thing apart again, and put it back together again, and it's now sewing at speed. I don't know what I did differently lol. Tension is messed up now though. Seems odd, but whatever lol.

[fibersport]

One other thing to look at, what size thread and needle are you using?  I wonder if that could affect things since it seems to be tension, timing and speed related.