JeffHami

I believe so. The foot is raising at the front and dropping as it gets to the back. Had to loosen and adjust the large screw you see in the middle of the last picture to get it were it wasn't jamming against the plate as it began and ended its arc. From what I figured that arm if somehow connected to the stitch length so I set it to the largest stitch and then made the adjustments. Not sure if I am right but it is working on the test pieces I have tried. Could find anything written about how to adjust it so I did the best I knew how.

Well I think I figured it out. The oval bushing in the 1st pic has two holes. One is for the screw that goes into the slot and the other is just a set screw. They are booth the same thread and when I took off everything to clean and oil it I had put the set screw in the wrong hole and thus the timing was off.

One of these days I will get this right. I was working on getting the needle timing right on my machine and after a few tries I got in right on the money I noticed I now have the timing for the foot movement messed up.I loosened the three set screws that lock the beveled gear in place and slid it back so the bobbin assembly moved freely. I loosen the two screws that held the bobbin assembly in place then I adjusted assembly so it to the right spacing between the needle and the pickup point. After I had the right spacing I tightened the two bobbin assemble screws from the bottom and moved the beveled gear back in place and tightened it up. When I was turning the machine by hand the needle timing and spacing were great but it appeared the presser foot motion was wrong. The needle was entering the front of the hole in the presser foot and exiting the back. The way I remember it is the needle entered the back and exited the front. I see on the spline that the oval bearing that makes it move back and forth has a groove that it locks into so it can't be adjusted. On the other end of the shaft is a bar that moves back and forth (image00004.jpg) and has a set screw but I not sure what that will change. Can anyone help me get the presser foot and needle back in time I would greatly appreciate it.

I converted a 153W 100 over to a servo with no problem but I did find I needed to install a speed reducing pulley so I could drop the speed down slow enough to do leather.

It is 1/4 longer than the one I removed and didn't have a flat spot to lock the set screw into. When I pulled it part way out everything went back to moving freely. I push it back in and you could feel something strike it. Trust me I never would have guessed it was possible and that is why I didn't remove it first thing. I was going all over the machine looking for loose screws.

Well after going nuts the better part of the afternoon I started retracing my steps. I had installed a thread retainer, but thought that could not possible have anything to do with it, but after doing everything else I decided to remove it and now everything works. Now I will spend tomorrow retiming and getting everything back into adjustments. All this work because of a damn $5 part.

There are days I think this machine just likes to screw with me. I just installed a speed reduction pulley system and tested the machine with no thread and it worked great. Turned everything off and came back to run a few test with thread and leather and before I did a thing I checked everything was moving fine and the machine will now only turn 1/4 of a turn. It will turn back to the original position put no further. I disengaged the bobbin assembly to make sure there are no jams there, I removed the needle, the needle plate and feed dogs. The only thing that I see that moves in that limit is an arm that I have an arrow pointing to in this pictures. Also it appears to stop as the takeup lever is at its extremes. I have looked for loose screws, but I can't see a thing.

I want to thank everyone for all their help and let you know the upgrade went great. I had to move the motor back and over to get it to work the way I wanted. I used 3 carriage bolts to hold the motor and I mounted the speed reducing pulley with the three large wood screws it came with. I bought my belts from Grainger Supply, they have just about every size belt you could want.

OK one last question on this subject. The new Techsew pulley will be in Thursday and I'll have to move the motor and mount the new pulley. Does anybody have any advice on what type of screws/bolts to use in the wood for mounting the motor and pulley?

I've done a web search and found them at Tractor Supply https://www.tractorsupply.com/tsc/search/3L Type V-Belt and Granger Supply https://www.grainger.com/category/v-belts/power-transmission-belts/power-transmission/ecatalog/N-cc2Z1yzazhm If they don't work I'll try one of the sewing machine suppliers.

Is there a local store that might sell belts like Ace Hardware or a mower shop?

Gregg, What my original idea was to make a box that would go inline and limit the RPMs so I could run the machine slow no matter how hard I pushed on the pedal. After all the advice on the forum I decided adding the pulley was the best idea because it also increases the torque while slowing the machine speed. I am going to remove the machine and flip the table over then rework everything when the new pulley comes in. I hope to be able to buy the new belt sizes I need at my local auto parts store.

Thanks, I never thought of that.

It looks like an electronic speed reducer is out so I decided to go with the Techsew speed reducer. I didn't want to mount all the pulleys and bearings on the top of the table and the Techsew had the smallest footprint and looks well made. Thank you to everyone for all the help and ideas.

Just watched it thanks. I think I may go with this idea.