Chinese Leather Shoe Patcher : a 3-point turn to lock a stitch 中國補鞋機 : 搖轉三步鎖出線步 

These peoples were indeed mechanical talents and their machine is a mechanical wonder. It looks like a museum item but is still accepted today despite so many modern sewing machines available. Thanks for watching.

@@kslam5733 I love it and I am also very grateful to you for the time you have spent putting such great instructional videos together. Thank you and greetings from England!

Thanks for your words of encouragement. I found that you are also a DIY master almost skillful in making and refurbishing things that we use everyday. Rather, I would learn more from you through your RU-vid channel. As you are also a member of the facebook group "Chinese Leather Shoe Patcher", I have chance to learn more from you about the patcher especially you have mentioned the "reverse engineering" of the patcher.

You know the ways how this little wonder works and describe in words clearly. Hope you can find more from this 'museum collection' item. Thanks for watching.

I hope so, but at this moment I am quite indulged in other interesting things such as electronics and 3D drawing. I would take it up when time permits.

Thanks, hope that it helps people understand more the machine, and more confident they can be to deal with any issues happened.

This is the purpose of making this video : let users know the steps how stitches formed and through the process they would also learn the structure and mechanism of the machine. Then any issue related to the bobbin would no longer be a trouble for them. The initial setbacks in using the machine you suffered is also the story of me and many. Your insistence to overcome the problems saved the machine from being treated as a "crap".

You are welcome. Happy to see you can find hints to the issues you encountered after watching the videos.

You are welcome! I got the same experience as yours when meeting a faulty appliance and the result was usually throwing it away. The incentives for making videos on the Chinese patchers is stopping users to throw them into the trash bin.

Your experience in using the machine was also true to me. This machine needs some adjustments and users need learning some basic skills before any success. As skills accumulated, users would find the machine a very useful DIY tool. This is the reason why I like to share what I have learned using the machine in refurbishing, repairing and making things. It is hoped that users' negative views when using it in the beginning would not last long. For timing issue，I have another video on it. Search RU-vid for it.

When placing the bobbin back into the machine, put the handle on the crank at 12 o'clock, the bobbin shuttle should be a half moon with its center at 3 o'clock in the bobbin hole.

Only by hand: move up the presser foot (disable it), move the fabric each time to a suitable length, then turn the needle down to sew.

If you mean bobbin drive gears are those immediately under the bobbin, then just put a few drops of lubrication onto them. If you mean the rod moving the bobbin, then a few drops of lubrication onto the areas you can touch.

I totally agree with the points you raised. Learn from others to improve skills of using tools. This should last for whole life. Don't blame the machine but yourself for any failure. All your points are great wisdom.

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The origin of the prototype of this patcher was unknown but may be from Europe in the 19th century. The popular use of it began in the post war China in 1949 when China needed to develop on her own in face of the US containment. The containment made China suffer from inadequacies in everything especially daily necessities. Chinese people needed to wear clothes and shoes even though they were broken. The patchers were then put to use for this purpose. These patchers were expensive during that time. People tried to produce them in their backyards at nights believing that they would get rich by selling them. They dared not produce them openly in day time because they were not allowed during that time. Also many people tried to buy one to be cobblers in the streets. They could earn a living by that tool. As producing them was so difficult the patcher was rough both in outlook and the materials. The patchers then remain rough even up to nowadays as they were designed for the professionals with no user friendly settings and streamlined body. The patchers were quite a useful patching machine for the street cobblers since the 1940s. They could be found almost in every city in China in the 1970s, 80s, 90s and even the 2000s. However when China reformed herself in the 1980s and people getting wealthy in the 2000s, the patchers were gradually phased out from the streets. Surprisingly the machine is now quite acceptable to other countries rather than China herself. Chinese people do not like to own such a museum item in their home where spaces are quite limited. They get used to buy things when broken rather than letting the street cobblers to mend them.

Indeed I have thought about that putting a split screen showing the crank wheel movement. However, in doing so the shots on the bobbin movement would be reduced in size. I then simplified the crank wheel movement views to just a wheel with animated arrows showing the 3 steps positions. Thanks for your suggestions.

Thanks for watching. Hope that it can help you to know more about the patcher.

Do you mean the iron flat plate on top of the bar? the hole comes with the plate because the plate can be used both sides, it is for fitting onto the extrude point for fixing the plate. My bobbins do not have holes on them. If there is, it is for easy threading of the bobbin.

Sounds like you need to adjust your upper thread tensioners tighter

Thanks for watching. The working principle is when the needle pierces into the fabrics, thread turns to be U shaped via the needle eye. On one side, thread gets into the needle groove; on the other side where no groove but a scarf, thread also being straightened. Then when needle withdraws from the fabrics, friction with the fabrics creates a thread loop on the scarf side. If the needle position is wrong, the shuttle hook would not grab it.

you are welcome.

Press pause to view and to figure out how this little machine works. To unfold the secrets of how the needle and the bobbin work to form the lockstitches is my intention in making this video. Thanks for your feedback.

Take time! I also did not understand the machine in the beginning. As I had a lot of time after retirement, I could devote more on how it works. It was indeed not difficult as you can see all my videos on this machine. The videos reflect the issues I came across and the ways I overcame them. Just two words for you: Time and practice.

Do you mean "get the foot to work" again ？ Describe more about the issue you are encountering.

The snapping of thread especially the upper thread would definitely happen if no polishing done to areas the thread goes through. So check every inch the thread comes into contact and polishing them. Watch out especially the bobbin case, the edges and the small hole the bobbin thread goes through. Also the path the upper thread runs through such as any twists formed and jammed inside the tensioner, any obstacle happened in any corner passing through, thread size is suitable for the needle (too thick would not go through the needle eye smoothly and would snap).... If problem still exists, make a transparent plastic cover like my example in the video to find out how and when it happened. It is not difficult to find out as it is just a simple machine.

@@kslam5733 thank you very much!

Not fully understand the text translated. The thickness of the threat depends on what you want to sew. From my experience, use good quality and not too thin thread is the golden rule. The thread needs to pass through many edges of the machine, It is easy to break. You also need to use proper size of needle and right thickness of thread, they need to match. All these should be learned through practices by yourself.

Check the path the thread runs from the thread spool to the needle. Any obstacles would tighten the thread from forming the loop for the bobbin hook to grab. A skipped stitch would form. The correct routing of the thread is also important. Check from the file section of the Facebook group "China leather shoe patcher" for more details. You can also raise your questions there. Join them as a member and you would have lots of helping hands.

@@kslam5733 Thank you, I will check into that

There must be something wrong with the path the thread passing through rather than the tension adjustment mechanism. Check carefully inch by inch how the thread moves, you will find the answer.

@@kslam5733 i did i ended up cutting a little off the spring , thx for your reply i have been working on this on and off for several weeks with no luck yet , im very patinet and have found your videos most helpful , my machine arrived un-tested locked down it was assembled wrong from factory , the pitman rod was in the wrong grove of the flywheel , im slowly getting there thanks again for your reply

Thanks!

Clock positions.

For timing issue, see another video I posted. The purpose of this video is for users having the basic knowledge and skills in using the machine. It is really "useless" to find any solution for the timing issue.

@@kslam5733 The segment, when needle thread picks the bobbin's thread, is not on any video of yours. It looks that every machine of this type is different. I finally made it work but I had to put handle at 12 o'clock and half-moon carrier of the spool at 3 o'clock contrary of your suggestion.

@@a.z.c.681 All these machines are the same in structure since their birth in the 1940s in China. What you said the directions of placing the bobbin carrier are reaching the same result. My version of placing both the bobbin carrier and the handle at 9 o'clock positions are adapted from the original Chinese version of instructions. It is easier to remember and to adjust. For more information about how to use these machines, join the Facebook group "China leather shoe patcher". People there would be very happy to give answers to your problems.

@@kslam5733 Thanks.

¡De nada! Espero que la máquina pueda ayudarte. You are welcome! Hope the machine can help you.