Pfaff 545 bobbin case top and bottom

[Damas]

Hello All,

I recently had the opportunity to get a Pfaff 545 :

And I am experiencing an issue with tension :

There isn't any notch neither in bobbin case top, neither in bobbin case base as it normally should (circled in red below, sorry blurry pic).

As a consequence, thread is pinched hard while sewing, and pulling the needle thread to the bottom of my work, no matter how I try to set upper tension or bobbin tension.

Have any of you having this machine, a similar problem and how did you deal with it ?

 

[AlZilla]

Is it maybe supposed to come out over to the right, at the 5:00 position and ride over that tab?

[WoVo]

There were rougly 10 different hooks for the 545, depending on thread thickness etc.

Your hook/machine is set up for very thin thread (likely textile garment production), so no open notch. Likely max. NM 100 thread.

Good thing: You could still get parts and adjust the 545. What thread are you intending to use?

[CowboyBob]

Thread underneath the base(on the left) instead on going between it.

[Damas]

50 minutes ago, AlZilla said:

Is it maybe supposed to come out over to the right, at the 5:00 position and ride over that tab?

I believe not, according to user manual, but I can be wrong 

41 minutes ago, WoVo said:

Good thing: You could still get parts and adjust the 545. What thread are you intending to use?

That makes sens. I intend to use 20 (tex 135) top and 30 (tex 90) bobbin, with a 120 needle. I suppose I'll have to get a new bobbin case for it...

10 minutes ago, CowboyBob said:

Thread underneath the base(on the left) instead on going between it.

I'll give that a try !

[CowboyBob]

8 hours ago, Damas said:

That makes sens. I intend to use 20 (tex 135) top and 30 (tex 90) bobbin, with a 120 needle. I suppose I'll have to get a new bobbin case for it...

Usually the smallest you can use for 138 is size140

[Damas]

I'll try that too 👍

[friquant]

You may want to grind it to accommodate your desired thread. Here is a photo of my pfaff 545 when I got it. (note the ill-fitting bobbin case)

 

[AlZilla]

12 minutes ago, friquant said:

You may want to grind it to accommodate your desired thread. Here is a photo of my pfaff 545 when I got it. (note the ill-fitting bobbin case)

 

I had that same thought. But if they made 10 different bobbin setups, I'm thinking the spring must be l pretty fine tuned to the intended thread size.