pfaff 545-H3-6/01 CSMN

[friquant]

42 minutes ago, VinnyK said:

stil have not found the problem with the tread jamming. see allot of videos, but either they show nothing or extremely to much XD

With the motor disconnected, and the bobbin cover plate slid to the right, you can watch stitches form as you turn the handwheel. Once you can identify what it looks like when a good stitch is made, and what it looks like when the thread jams, you can start to trace out how the jams are happening.

[VinnyK]

On 1/24/2026 at 1:40 AM, friquant said:

With the motor disconnected, and the bobbin cover plate slid to the right, you can watch stitches form as you turn the handwheel. Once you can identify what it looks like when a good stitch is made, and what it looks like when the thread jams, you can start to trace out how the jams are happening.

yeah thats the plan. open it up and see where it goes wrong. get some good lighting going and see whats what

 

[VinnyK]

the good news is. i finally got it stitching

the bad news is that it inst pretty or good.

keeping the smallest stitch length its stitching just not good looking.

but when i turn it up for longer stitches it starts messing up badly.

so what does everybody think ? is it a tension problem ? any advice would be apreciated.

i took apart all the stuff inder the needle i sanded down rough edges and cleaned everything. but didnt find any burrs or nothing. the under side of the feeddog had some carving that was weird in my opinion 

and everythime i used the knee lifter i heard a click and i found the problem.

the bracket that helps take the tension of the top tread when lifting the feet was broken

and the home made a piece that slips off and dont do much. so ill go look for a replacement for that.

already spend 3 days working on this and i was ready to give up and bring it to a mechanic. 

but i learned they are hard to find. and the ones i called dont do it anymore only domestic machines.

so that sucked. i need this machine to run and work for me. cant keep fiddling for ever on this.

and dont have the money to buy another one and find that that has problems to XD

 

[nejcek74]

You have skipped stiches and a nest bellow? Have you checked the timing of the machine?

here is one document, check the added text at the end
https://docs.uwe.net/Pfaff-145-545.pdf

you can also check different pfaff 1245 Service manuals which have nice graphics. It is much newer machine but certain things are same / similar etc

 

[friquant]

I see tension issues. You mentioned an upholstery shop, so I'm not sure if you are new to sewing or an old pro. Have you experimented with different tension settings to get the looped threads under control?

For photos, do you have some white thread you could use for the needle thread so we can easily see which is top vs bottom?