Your willingness to abandon a bad idea to chase a better one is admirable and rare in many cases. 3D printing makes it a lot easier. Throwing away an expensive machined assembly is more difficult than a 50 cent print. You have spent a lot time trying to avoid drilling a hole in that machine and sought more complicated compromise solutions instead. Keeping that encoder inside is worthwhile.
Thanks, I like looking for simpler solutions. I would prefer to have the encoder inside and could probably do that using a gear connected directly to the spindle gear. Perhaps in the future. Right now I'm going to call this good enough and move on to the other parts of the ELS conversion. For me it's tempting to keep iterating, so I have to stop myself when it's good enough.
All you have to do is look at cars that had simple design flaws and lost millions when someone could have a better way. Better is always better if it is within your means to do so. Perforated bovine! Bellevue has changed so much in this last year. Transit is getting closer.
And this might not be the final design either. I found some other pulleys that will be here Thursday that might work out better. Stay tuned. And yes, Bellevue keeps changing. The Sprint District especially.
It would be interesting to know if you could use two ⚙️ gears meshed together. You can even 3d print them since it doesn't carry a load, making a metal gear superfluous.
I thought about going that route. The difference is that using pulleys with belts results in no backlash, so I can use the spindle position readout on the ELS 4 Basic. They're also quieter than gears. Or if you meant 3D printed pulleys, yes, that might be an option. I was thinking about trying that while I waited for the metal pulleys to arrive. Unfortunately, the belts are on back order. They were three different belts, so I'm not sure why they all ended up being back ordered. I've been thinking about trying to 3D print some belts using TPU.
Instead of using a pulley and belt, could you use a diametric magnet that is mounted using an adapter inside the shaft and then have a board that has the magnetic encoder chip parallel to the shaft end / diametric magnet. Look up AS5047. The one down side of these magnetic encoders is that they can be sensitive to stray magnetic field although these are supposed to ignore them. Another option could be make a cap that goes over the shaft that protrudes out the side cover hole and this cap has a short shaft that the encoder attaches to. This doesn't require pulleys but you do have to make a cap which you can do on your lathe. Another choice would be look at encoders at US Digital.
I didn't want to put anything into the shaft, as that would prevent my from turning long parts that would otherwise fit into the shaft. In a part 4, I have a final mount that I'm going to stick with.
It's really fun to see one jump out of your hand and flip over. That actually happened in the video (but wasn't obvious). I had the magnet under the door reversed, so the magnet jumped out of the 3D printed part and flipped over.
Possibly. I looked for encoder wheels that could go on the outside. None of them had a large enough inner diameter to be able to fit over the shaft. But, perfect is the enemy of progress (or something like that). In part 4 I have a solution that I'm going to stick with.
Good job, John. if you need more this power tranmistion alloy, you can buy it from China directly with more cheaper price and you can receive them much quicker as they can send by FEDEX, DHL. you don't need to wait for 1 month. contact me as i can find it for you or custom-made any steel, aluminum,brass parts for you.. i look forward to hearing from you soon.thanks Shirely
I have the same machine you have there and I also have 3 original chucks but they all need the jaws replaced, do you happen to know where a person could find jaws to fit, I bought new chucks from accurite but as you know the way these stock chucks were made they really minimize overhang weight on the spindle, if you have any info that could help me it would be greatly appreciated. thank you.
Sorry, I don't. At some point I want to get a 4-jaw chuck and will need to do some research to figure out where to get one (or what to buy and then make an adapter plate).
@@JohnSL i got my backing plate and chuck off amazon, they are both accurite and i am very pleased with it, my 4 jaw is a JET and I just bought another backing plate and machined it and it also works well, but both chucks are fairly heavy but I have had no issues.
@@JohnSL I have the 8.4 basically the same setup. Great little lathe mill combo. I’ve got bigger but I still use this combo , it’s convenient and lends itself to smaller job nicely. Enjoyed the video!
![[MV] A leap of faith...ความเชื่อใจครั้งสุดท้าย (From "Petrichor the series")](http://i.ytimg.com/vi/U1piZH2CNXA/mqdefault.jpg)
Your willingness to abandon a bad idea to chase a better one is admirable and rare in many cases. 3D printing makes it a lot easier. Throwing away an expensive machined assembly is more difficult than a 50 cent print. You have spent a lot time trying to avoid drilling a hole in that machine and sought more complicated compromise solutions instead. Keeping that encoder inside is worthwhile.
Thanks, I like looking for simpler solutions. I would prefer to have the encoder inside and could probably do that using a gear connected directly to the spindle gear. Perhaps in the future. Right now I'm going to call this good enough and move on to the other parts of the ELS conversion. For me it's tempting to keep iterating, so I have to stop myself when it's good enough.
All you have to do is look at cars that had simple design flaws and lost millions when someone could have a better way. Better is always better if it is within your means to do so.
Perforated bovine! Bellevue has changed so much in this last year.
Transit is getting closer.
And this might not be the final design either. I found some other pulleys that will be here Thursday that might work out better. Stay tuned. And yes, Bellevue keeps changing. The Sprint District especially.
It would be interesting to know if you could use two ⚙️ gears meshed together. You can even 3d print them since it doesn't carry a load, making a metal gear superfluous.
I thought about going that route. The difference is that using pulleys with belts results in no backlash, so I can use the spindle position readout on the ELS 4 Basic. They're also quieter than gears. Or if you meant 3D printed pulleys, yes, that might be an option. I was thinking about trying that while I waited for the metal pulleys to arrive. Unfortunately, the belts are on back order. They were three different belts, so I'm not sure why they all ended up being back ordered. I've been thinking about trying to 3D print some belts using TPU.
Instead of using a pulley and belt, could you use a diametric magnet that is mounted using an adapter inside the shaft and then have a board that has the magnetic encoder chip parallel to the shaft end / diametric magnet.
Look up AS5047.
The one down side of these magnetic encoders is that they can be sensitive to stray magnetic field although these are supposed to ignore them.
Another option could be make a cap that goes over the shaft that protrudes out the side cover hole and this cap has a short shaft that the encoder attaches to. This doesn't require pulleys but you do have to make a cap which you can do on your lathe.
Another choice would be look at encoders at US Digital.
I didn't want to put anything into the shaft, as that would prevent my from turning long parts that would otherwise fit into the shaft. In a part 4, I have a final mount that I'm going to stick with.
@@JohnSL ahhh. Thanks for the explanation about the house being there for long stock.
Great video 👍 john Had to laugh those magnet's are strong I know, can make a fun game ask someone to pull apart two 25 magnet's lots of fun 😆.
It's really fun to see one jump out of your hand and flip over. That actually happened in the video (but wasn't obvious). I had the magnet under the door reversed, so the magnet jumped out of the 3D printed part and flipped over.
@@JohnSL so powerful when they snap together pinched my skin 🤕
Wouldn't it be possible to source an encoder big enough to mount it concentric to the spindle? But I do like your simple piggyback design anyways.
Possibly. I looked for encoder wheels that could go on the outside. None of them had a large enough inner diameter to be able to fit over the shaft. But, perfect is the enemy of progress (or something like that). In part 4 I have a solution that I'm going to stick with.
Good job, John. if you need more this power tranmistion alloy, you can buy it from China directly with more cheaper price and you can receive them much quicker as they can send by FEDEX, DHL. you don't need to wait for 1 month. contact me as i can find it for you or custom-made any steel, aluminum,brass parts for you.. i look forward to hearing from you soon.thanks Shirely
I have the same machine you have there and I also have 3 original chucks but they all need the jaws replaced, do you happen to know where a person could find jaws to fit, I bought new chucks from accurite but as you know the way these stock chucks were made they really minimize overhang weight on the spindle, if you have any info that could help me it would be greatly appreciated. thank you.
Sorry, I don't. At some point I want to get a 4-jaw chuck and will need to do some research to figure out where to get one (or what to buy and then make an adapter plate).
@@JohnSL i got my backing plate and chuck off amazon, they are both accurite and i am very pleased with it, my 4 jaw is a JET and I just bought another backing plate and machined it and it also works well, but both chucks are fairly heavy but I have had no issues.
Surprised you didn’t know that was aluminum
Yea, well, lack of experience with machines.
@@JohnSL I have the 8.4 basically the same setup. Great little lathe mill combo. I’ve got bigger but I still use this combo , it’s convenient and lends itself to smaller job nicely. Enjoyed the video!