Encoder mount Charter Oaks Desk Top Mill
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Encoder mount Charter Oaks Desk Top Mill
So here's my encoder mount for my Charter Oaks mill. I have a air cylinder on top of the spindle shaft so I had to get creative with mounting but that's the fun, right? I used 2 skate board bearings since they are sealed, small durable and I use them in a lot of my plasma cutter builds. I mounted the 2 bearings in one piece of aluminum with about .100 between them with a spacer which makes them work really nice in single arm setups like this and there's not a lot of load on the shaft since the pulley is so close to the bearings. For the encoder I used one of the $25 Omron Ebay bomb shell specials. If you do get an Ebay encoder chuck it up in your drill or lathe and check out and see if the body wobbles. I did not do this and when I went to check it running I thought I screwed up drilling my coupler or something it wobbled so bad. So I made another and of course you already guessed, it was the same wobble. So I checked the encoder and realized it wobbled almost as much as a penguin. Well not that much but I don't think it will last. So now I know why they give us the plastic flex coupler. So that's done for the moment, I have another one coming so I can check and see if I got a bad one or they are all wobbly. I just received my Acorn about an hour ago so hopefully I'll have the mill or the lathe switched over this weekend. I have to encoder mount for the lathe almost finished. Tomorrows another day. I'll upload pics of it when I finish that mount. The lathe is a YCL1236 if anyone has one and needs ideas.
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Re: Encoder mount Charter Oaks Desk Top Mill
Looks good!Roadstercycle wrote: ↑Thu Jan 04, 2018 9:27 pm So here's my encoder mount for my Charter Oaks mill. I have a air cylinder on top of the spindle shaft so I had to get creative with mounting but that's the fun, right? I used 2 skate board bearings since they are sealed, small durable and I use them in a lot of my plasma cutter builds. I mounted the 2 bearings in one piece of aluminum with about .100 between them with a spacer which makes them work really nice in single arm setups like this and there's not a lot of load on the shaft since the pulley is so close to the bearings. For the encoder I used one of the $25 Omron Ebay bomb shell specials. If you do get an Ebay encoder chuck it up in your drill or lathe and check out and see if the body wobbles. I did not do this and when I went to check it running I thought I screwed up drilling my coupler or something it wobbled so bad. So I made another and of course you already guessed, it was the same wobble. So I checked the encoder and realized it wobbled almost as much as a penguin. Well not that much but I don't think it will last. So now I know why they give us the plastic flex coupler. So that's done for the moment, I have another one coming so I can check and see if I got a bad one or they are all wobbly. I just received my Acorn about an hour ago so hopefully I'll have the mill or the lathe switched over this weekend. I have to encoder mount for the lathe almost finished. Tomorrows another day. I'll upload pics of it when I finish that mount. The lathe is a YCL1236 if anyone has one and needs ideas.
You can not rigidly couple most motors. They have to use a flexible coupler.
This little "Omron" encoder won't likely last just mounting a pulley or gear to it. Not designed for that type of load. May have a fighting chance with the small coupler (and not that plastic thing they sent with it!
![Smile :)](./images/smilies/icon_e_smile.gif)
Keep us posted on your progress!
Marty
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Mesa, AZ
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Mesa, AZ
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Re: Encoder mount Charter Oaks Desk Top Mill
I don't see any real load on the encoder in this design. My guess is that the bearing load is in the mount.martyscncgarage wrote: ↑Thu Jan 04, 2018 10:13 pm Looks good!
You can not rigidly couple most motors. They have to use a flexible coupler.
This little "Omron" encoder won't likely last just mounting a pulley or gear to it. Not designed for that type of load. May have a fighting chance with the small coupler (and not that plastic thing they sent with it!)
Keep us posted on your progress!
Marty
Clay
Clay
near Winston-Salem, NC
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near Winston-Salem, NC
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Re: Encoder mount Charter Oaks Desk Top Mill
Yes, he has the pulley supported as an idler. I was only mentioning needing a flexible couple between the encoder and the idler shaft and not using the little plastic coupler they send with the encoder. ![😀](https://cdn.jsdelivr.net/gh/s9e/emoji-assets-twemoji@11.2/dist/svgz/1f600.svgz)
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Mesa, AZ
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Re: Encoder mount Charter Oaks Desk Top Mill
Good point. Misunderstood your comment.martyscncgarage wrote: ↑Thu Jan 04, 2018 11:09 pm Yes, he has the pulley supported as an idler. I was only mentioning needing a flexible couple between the encoder and the idler shaft and not using the little plastic coupler they send with the encoder.![]()
Clay
Clay
near Winston-Salem, NC
unofficial ACORN fb group https://www.facebook.com/groups/897054597120437/
near Winston-Salem, NC
unofficial ACORN fb group https://www.facebook.com/groups/897054597120437/
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Re: Encoder mount Charter Oaks Desk Top Mill
Ya sorry. It was a generalized statement. I am curious to see how long the import Omron encoders last.frijoli wrote: ↑Thu Jan 04, 2018 11:24 pmGood point. Misunderstood your comment.martyscncgarage wrote: ↑Thu Jan 04, 2018 11:09 pm Yes, he has the pulley supported as an idler. I was only mentioning needing a flexible couple between the encoder and the idler shaft and not using the little plastic coupler they send with the encoder.![]()
Clay
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Mesa, AZ
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Re: Encoder mount Charter Oaks Desk Top Mill
A short length of rubber tubing will work as a flexible coupling.
Silicone tubing is even better. If it's a small encoder shaft, the local hobby shop will have silicone fuel tubing in various sizes.
![Smile :)](./images/smilies/icon_e_smile.gif)
Milton in Collierville, TN
"Accuracy is the sum total of your compensating mistakes."
"Accuracy is the sum total of your compensating mistakes."
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Re: Encoder mount Charter Oaks Desk Top Mill
Why not use the correct flexible coupling? They are dirt cheap. Just search Amazon or Ebay for flexible shaft coupling. I guess it would work for RPM, but wouldn't trust it if I were rigid tapping....I'd kinda be ticked if my tap broke off in the part because of a slip in my rubber.DICKEYBIRD wrote: ↑Fri Jan 05, 2018 4:32 am A short length of rubber tubing will work as a flexible coupling.Silicone tubing is even better. If it's a small encoder shaft, the local hobby shop will have silicone fuel tubing in various sizes.
![Surprised :o](./images/smilies/icon_e_surprised.gif)
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Mesa, AZ
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Re: Encoder mount Charter Oaks Desk Top Mill
Hi Guys, Thanks for all your comments for sure. I do like the silicone tubing idea. As far as the tube slipping a little touch of super glue on the shafts will fix that, it works very well. There's no load on encoders they turn very easy. I have very little room that's why the coupling was made that way. The coupler is a combo as it's also threaded internally to be the lock nut for the bearing shaft and a coupler for the encoder. Couldn't tap and use the plastic coupler as a nut, that's for sure. I did while writing this figure out a way to murder all the birds with one stone thanks to you guys and the silicone tubing. I"ll fix it by using a threaded rod, a thin jam nut, turning down the 5/16" shaft to .240 under the encoder and use 1/4" tubing to make the encoder coupling. I may have to cut the encoder shaft off a bit, maybe an 1/8". Anyway again thanks for the comments and help. Sometimes you need a little brain storming.
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Re: Encoder mount Charter Oaks Desk Top Mill
I was watching some video on YouTube of a guy building a cnc router and he used rubber hose and hose clamps to connect his steppers to the lead screws. Just wow.