Help! Presser foot not moving, needle foot going wrong direction, Techsew 4100

[YinTx]

Maybe someone can help me out with this frustration.  After 6 years of the machine collecting dust because it won't sew, I've been tinkering with it because I have some projects that just need a sewing machine to be finished.  So here is where I am at:  tried @Uwe's video showing how to set timing, not working for me.  Looks simple, but not happening.  When I loosen the hex head bolt to adjust the shuttle hook, adjust it, then you have to rotate the handwheel back so you can tighten the bolt, which means the shuttle hook is defacto put back out of timing because it stays still while the shaft moves.  WTH?  The best I can get is the hook not retracting (sticks out 1/8") at it's furthest back otherwise it will not interact with the needle correctly (ie, completely misses the needle, which will already be up before the hook comes to try to catch a loop).  At just short of 20 degrees is when the hook and the needle cross, not the 30 degree mark.

Also, trying to set the presser foot and needle bar foot coordination, but it isn't happening either.  Tried a hundred different guesses also, none working.  Always, the needle bar foot is going up when the needle is going down.  And the presser foot hardly moves (5mm lift).  Anyone have a simple way of setting this?  Once again, tried to follow @Uwe's video, set the linkages vertical.  Now its a disaster.  Clearly I am doing something wrong, or something is set up backwards or I don't know.  What should I be looking at?

 

The video I made in 2015 clearly shows my issue, which I didn't know I had at the time.  You can see at the 2:47 minute mark when I spin the hand wheel how bad the foot coordination is.  Other than that, the rest of the video is just discussing the binding issues, which seem to have been reduced significantly.  If you mess around with the linkages too much, it'll bind up solid again.

I would really like to get this piece of iron functional, so if anyone has tips, suggestions, clues, etc, please let me know!

YinTx

Edited November 11, 2021 by YinTx

[RockyAussie]

On 11/11/2021 at 2:36 PM, YinTx said:

 When I loosen the hex head bolt to adjust the shuttle hook, adjust it, then you have to rotate the handwheel back so you can tighten the bolt, which means the shuttle hook is defacto put back out of timing because it stays still while the shaft moves.

After you have determined that you have the needle bar set at the right height,  Open the stitch length lever to the widest possible stitch all the way out. Take the needle down to the bottom and keep going untill the needle is just about to start coming up. At this point the hook should be sticking out about 1mm. If not then loosen the 6mm Allen head bolt then keep going back and forward nipping up the allen head a little at different spots until you get it right.  Unless you get this part right first there is no point doing any other adjustments.

[YinTx]

12 hours ago, RockyAussie said:

After you have determined that you have the needle bar set at the right height,  Open the stitch length lever to the widest possible stitch all the way out. Take the needle down to the bottom and keep going untill the needle is just about to start coming up. At this point the hook should be sticking out about 1mm. If not then loosen the 6mm Allen head bolt then keep going back and forward nipping up the allen head a little at different spots until you get it right.  Unless you get this part right first there is no point doing any other adjustments.

I have this part adjusted to where the point sticks out about 1mm.  I am studying the following video to see if the eccentric cam has slipped on the shaft...  at the 1:40 mark, my machine is doing the opposite of what @Uwe indicates it should be at, which may explain why the feet move opposite of what they should.  I'm trying to figure out how to adjust this cam...

 

[YinTx]

45 minutes ago, YinTx said:

 I am studying the following video to see if the eccentric cam has slipped on the shaft...  at the 1:40 mark, my machine is doing the opposite of what @Uwe indicates it should be at, which may explain why the feet move opposite of what they should.  I'm trying to figure out how to adjust this cam...

Eureka, this has the needle foot going in the right sequence!  The cam was 180 out of sync...  now I need to figure out how to get the presser foot to lift...

YinTx

[RockyAussie]

@YinTx, Now if you have the needle bar and hook in their right place I think you should follow the steps as in this Video by Uwe. It does get to the end alright if you just follow the sequence in the order he has shown.

 

[YinTx]

9 minutes ago, RockyAussie said:

@YinTx, Now if you have the needle bar and hook in their right place I think you should follow the steps as in this Video by Uwe. It does get to the end alright if you just follow the sequence in the order he has shown.

 

That was the video I was referencing on my first post. I spent many hours back and forth with it. For some reason, the numbers on this machine don't match his, could be because this is a Techsew and not a Juki?  After I finish stitching the jobs I have, I may play with it some more to see if I can get them closer to his.

 I am beyond ecstatic that I have finally gotten the feet to sequence correctly, after finding the camshaft out alignment 180 degrees.  Supposedly per the individual I purchased it from, this went back to the supplier to fix when it was purchased new, and they sent it back this way, and it has never sewn correctly.

Right now, I am getting it to stitch, feet march correctly, both feet lift, backstitching works, tension is good, only complaint I have is the rear presser foot seems to be a bit jerky moving up and down, not too smooth at all.  It is very well oiled, so not that.

YinTx

[YinTx]

  psshee-eeww.  spoke too soon.  Stitched about 1.5 feet, then bent a needle and now tearing thread.  Going to have to take it apart again and see if it damaged the hook.  Tired, going to have to do it tomorrow.   Open to suggestions on other things to try in the morning tho!

YinTx

[kgg]

1 hour ago, YinTx said:

only complaint I have is the rear presser foot seems to be a bit jerky moving up and down, not too smooth at all.  

I would checkout this video as it adjusts a set screw behind the small horizontal plate that adds or releases tension on the up and down movement of the rear pressor foot shaft. May help in reducing the jerky movement. The video is called "Techsew 4100 Trouble shoot"

Link: youtube.com/watch?v=NHswdukpWog&t=600s

kgg

 

[YinTx]

6 minutes ago, kgg said:

I would checkout this video

  That is me in the video, that is the machine, still not happy after all these years.    I'm going to figure this bugger out tho.

YinTx.

[kgg]

24 minutes ago, YinTx said:

That is me in the video, that is the machine,

What a shame, that video was from back in 2015. I did wonder after watching both of the video's if he (now I know it was you) ever got it working correctly.

kgg