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Thread: Motorizing a Leather Patcher manual sewing machine (WIP)

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    Motorizing a Leather Patcher manual sewing machine

    Still a WIP, but someone swung by my channel and mentioned folks over here might be interested

    I picked up a cheap leather patcher machine (also known as a cobbler's machine), which is a cheap knockoff of Singer's 29K machines. They are designed for patching shoes, bags, patches, etc and are most often used on the street for quick repairs. The machines are super crude castings and roughly machined parts, but get the job done. Big hand crank, beefy needles, long arm to fit deep into bags/boots/etc.

    I'm adding a motor to mine, and then will clean up the casting/machined parts to make it a little more polished. I'm using a brushless "hoverboard" hub motor and coupling it to the patcher via a v-belt. Fabricated a v-belt pulley for the machine out of tooling plate aluminum, and a small adapter to mount a cast pulley to the motor. The motor was chosen because it's a low KV motor (~600 RPM max) and very torque'y for it's price (10-12NM based on other hobbyist's tests). They run $30 new on ebay, $15 used. Hard to beat that price

    The remaining work is to mount the motor and build a replacement stand (since the tripod that comes with the patcher is useless). I don't currently own a lathe, so there were some...uhh... creative arrangements to fabricate a v-belt pulley on a milling machine


    (Apologies for audio on this first video, things went a bit wonky in post-production and I didn't notice in time)


    Last edited by polyfractal; 02-14-2019 at 05:02 PM.

  2. The Following 4 Users Say Thank You to polyfractal For This Useful Post:

    giangthetool (02-08-2019), Jon (02-08-2019), PJs (02-09-2019), rlm98253 (02-08-2019)

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    Last video in the series (at least for now) is up!



    It's a short one, basically just machining a small bracket to hold the d-shaft of the motor. Then just a matter of screwing everything down onto a temporary 2x4 and wiring up an ESC + PWM generator to test it out.

    The runout on the motor pulley is embarassingly bad, but since it's low RPM and low force I don't think it'll really matter I'll eventually build a proper stand for this, or maybe just bolt it right to my craft desk

  4. The Following 2 Users Say Thank You to polyfractal For This Useful Post:

    Jon (02-14-2019), rlm98253 (02-15-2019)

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    Plankspanker's Avatar
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    Love the video but you gotta tell me the name of the song and the band playing in the video !!! I NEED THAT BLASTING IN MY SHOP !!!

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    Haha, thanks

    The first song is "Say You Will" by "Wellmess", but I think they only do "licensed" songs for YT, TV, etc. Or at least, I can't find any more details about the band anywhere


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