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katit

Seiko STW-8B aka Consew 226R refurbish/adjust

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Reporting success!!! 

Got machine sewing today. At least I know nothing wrong with it and if small tweaks need to be done - I kind of know what to do. I really wish someone helped here with more advice..

Machine works! No more skipped stitches, runs solid and smooth at any speed I tried. 4-6 layers of upholstery leather - no problem!

Feed dog: Original was 6.05mm wide. New one was 6.3mm wide. Took it to mill and made it 6mm. No rubbing, all great.

Feet: Adjusted per Uwe's video on Consew 225, worked almost great. Except it is hitting casing as in picture of previous post. For now I adjusted it where it almost touches casing and it's almost like it should be. I wonder if I have to remove that piece of casting allowing for more movement?

Stitch len/reverse: It was set to do about 11mm stitches and no reverse. There is no adjustment block like in Uwe's video, but I figured out what I should adjust and used 2 red bolts in picture. I turned blue bolts all way out almost to make stitches as long as possible. I guess previous owner didn't care about reverse and needed longest stitch possible?? Now it does ~6mm forward/reverse. Not exact forward/reverse, but fine-tuning will be using blue bolts and sacrifice some len. 

Another thing about stitch length is speed. It looks like if I run machine at full speed - stitch size increases a little. I wonder if it's related to not just perfect feet timing and the fact that feet right now is smooth feet on a bottom.

Safety clutch: It was glued in, now it works. I tried sewing different tough materials - all great. Where I do have issue - it's when adjusting stitch size. When increasing stitch it's tight turning and causes clutch to pop. So I'm not sure if it's clutch or adjustment mechanism need to be dealt with. I did adjust stitch turning shaft with vise grips. I oiled it, soaked. Tried adjusting both ways and it loosened somewhat but still flips clutch when adjusting. I wonder if this is why previous owner got it glued. I see bunch of different bolts which supposedly can be used to loosed stitch mechanism, but hesitant to touch any of it for now unless I understand what to do..

Overall it works great, no binding of any kind. Everything very smooth. Front cover broken bolt fixed, all parts in place.

 

 

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Edited by katit

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Very very nice.

glenn

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Yesterday I loosened stitch adjustment just tiny bit. More oil. Now it moves. I can adjust stitch both ways without using other tools (aka vise grips). Still, need to turn slowly, otherwise safety will pop.

For that matter I consider restoration complete. Will sew some parts make sure it performs correctly with real stuff

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Amazing Work!

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@katit  you're a much  braver person than me. You have done a really  great job, but  I will never go that far on my machine :) 

I have the twin needle version  of yours. STW 28B .

Its 54 years old and works just fiiiiine ( touchwood) , I oil it & clean it regularly ( horse rugs...say no more )    :)

Well done .

HS

Seiko STW 28-B Pics 2018 001.jpg

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