Thanks Matt. Seems quite popular with the roughcut crowd, it was inspired by a CNC video I saw once, a bit like this... th-cam.com/video/uS3D0VPnDSY/w-d-xo.html
As in magic mushrooms. You had to be tripping your head off to come up with that idea. I love " out of the box" thinking, but this is on a different level 😊😊😊
Thanks Craig. It needs a little more work, but I'm actually quite pleased with it. I need sleep now, then hopefully will manage to watch some roughcut videos in the morning.
Hi, Thanks, but I must admit I didn't invent this, the idea came from a CNC video, and I adapted the concept to be driven by the lathe spindle rather than by a CNC controller. Still pretty awesome seeing flats appearing on a turning workpiece though.
Could you have the tools inside a "cup shaped holder" and drive the outside of the cup. With the part feeding into the centre. It might be a bit simpler and safer.
That's an interesting idea. I based mine on a CNC tool, but it is a bit scary as it is. Not entirely sure the geometry would work out though. I'll have a think. Thanks for the comment.
@@ollysworkshop all is well, and all that is gone, I may make a vid or two on this channel, but the other two are gone. Along with my drive to really push the channels, the brain has shifted off that type stuff, and is just bouncing around, yet there’s nothing it’s latched onto like it ussually does.
Thanks Paul, I've got about 5 videos in the pipe waiting to be edited, so will be a few weeks before I get round to it - also I have to make it work a bit better first!
Thanks Steve - the brain is already trying to improve the design, I would like to get it to a state where I can have a set of drawings that anyone could make.
What can you say about the needed diameter of the cutter wheel? I've seen several videos on how they work, how they were built, and so on, but nothing on that diameter.
Hi, I think the closer the diameter of the work is to the diameter of the cutting wheel, the more curved the cuts become. I haven't crunched any numbers, but I reckon approx 2:1 to 3:1 cutter to work diameter will be ok (larger is better), that's what I reckon just based on what I've seen on TH-cam.
Genius! Brilliant concept! 🧞♂️🎉🎊💥❤ I’ve seen other mechanisms tied to the feed shaft or the lead screw with universal joints, those seem like a headache. On the other hand yours is just small, simple and elegant. I have 3 thoughts. 1. Wouldn’t there be a need for a floating idler? I can see that you use a screw to tension it. However, it doesn’t allow for movement on the transversal. 2. When moving the carriage the belt slides. Would you consider a pulley mounted on splines? You could move the pulley, as a whole, along with the mechanism. 3. Would larger pulleys give more surface to the belt? I would consider the height of the center. Yes, I subscribed, i’d like to watch the build.
Thanks for the feedback, and I'm glad you found it interesting. The intention was very much that I wanted to create an attachment that would fit *any* lathe, not just my lathe, so I appreciate you noticing. I agree that the tensioning system needs much improvement, I have been thinking about how to make this work. If the tensioner doesn't take up the excess on both sides of the belt, then you end up with a non-integer number of teeth between pulleys, and it skips! I definitely did consider a pulley on splines, but I wanted to keep it simple as I didn't give myself nearly enough time to make it. That said, the long pulley works well, the belt moves across it as long as it's spinning. I'm hoping to have another stab at this sometime this year, so stay tuned! Thanks for watching.
Thanks David, unfortunately it's not original, but I was inspired probably 20 years ago by a CNC machine video which was using this technique. It's been rattling round my head ever since.
@@ollysworkshop It's still a fantastic idea and you've added 3D printing into the bargain. I wonder if this kind of thing was done on capstan lathes back in the day? Well done and good luck completing it.
Hi, the crash was multiple issues, but belt tension was definitely one of them. I'm hoping to get the build video done this weekend and I'll discuss issues and improvements. Stay tuned!
Dear Olly - I used a Polygon devide many many years ago, but complicate to set and install - you idea is great and very innovative. May I access the drwgs? I am Brazilian living in Brazil.
might work better with a chaindrive the chainsprockets have longer teeth so it would take more effort to let them slip a tooth , can probably put more force behind the tensioner too "but wat about being able to move it sideways then ?" eehm yeah you could have the sprocket on the chuckmount move sideways over a splined shaft (like a pto shaft ), might need a guide (fork) to hold it straight across the rest of the mecanism might allso be that the toothed belt slipping is caused by swarf falling intoo the gear/sprocket causing the belt to lift out its teeth , was seeing that happening and figured you putting a splash shield over it at a later date another idea could be to use an actual gearbox on the setup and use driveshafts with u joints to be able to change the distance between the driven and movable part , added bonus would be that you can do a chance of gears to go from 2 to 4 to 6 to 8 or how ever mush flats you want on there without adding more cutters (saves you from needing to set the height of each one ) would mean that unless you add a thirth gear the tool is spinning opposite the rotation of the part wish might make the cut more hollow (not flat)
Yeah, totally agree it needs something better, I just had all those bits lying around. I thought about a splined shaft and moving the gear/pulley, but when I realised I only had a couple of days to do it, I had to go with the absolute simplest implementation. There will be a mark II .....
Wow Olly, one word, Ambitious! What on earth did you eat or drink the day you came up with that idea? Fantastic proof of concept mate, I am really looking forward to seeing you mature this design. 10 out of 10 mate! Well done for even attempting this! Cheers, Jon
Thanks Jon. It certainly was ambitious - especially as I only started cutting metal on Friday morning (i had done the 3D prints beforehand). You would think I would have learnt from last year and done something simpler, but no. Keeps life interesting when you push yourself a bit though.
yep, I subscribed, I want to see a DIY version working, Polygonal turning is the next big thing in the CNC world......
The plan is to get it working better in the new year
Absolutely ingenious! I definitely need to see more on this one!
Thanks Matt. Seems quite popular with the roughcut crowd, it was inspired by a CNC video I saw once, a bit like this... th-cam.com/video/uS3D0VPnDSY/w-d-xo.html
That's a brilliant idea. Just brilliant! Never seen that before.
Hi Michel, I was inspired by CNC... th-cam.com/video/uS3D0VPnDSY/w-d-xo.html
That looks very promising. I guess once you beaf it up it will be perfect. Ingenious idea.
Steve.
Thanks Steve. I'm hoping so. It's a pretty brutal process for the 3d printed parts. I'll be having a go at improving it this weekend, all being well.
That's really clever Ollie. Coincides with mushroom season too. 🤣🤣🤣🤣
As in magic mushrooms. You had to be tripping your head off to come up with that idea. I love " out of the box" thinking, but this is on a different level 😊😊😊
🍄🍄🍄🍄🍄🍄🍄🍄🍄🍄🍄🍄🍄🍄🍄,
But seriously, I stole the idea from a CNC machine.
@@ollysworkshop I know 😁😁😁👍🏻
that's cool af! subbed and clicked all the good buttons
Thanks, glad you liked it.
Amazing idea..haven't seen anything like that before
Thanks Craig. It's based on a CNC tool I once saw. Link in the description.
Very nice Ollie!
Thanks Dan.
My head is still spinning...awesome idea !!
Thanks Dean.
Great work. We shared this video on our homemade tools forum this week 😎
Thank you. I'm hoping to get the build video out very soon!
This is a very cool build and a fantastic idea. I am looking forward to seeing the build
Thanks Joseph, I will hopefully have implemented some improvements soon so that it works better.
That is utterly insane (and brilliant). I hope I can see the finished job working later 😁 Nice one!
Thanks Craig. It needs a little more work, but I'm actually quite pleased with it. I need sleep now, then hopefully will manage to watch some roughcut videos in the morning.
@@ollysworkshop certainly generates a pucker at the moment 👍👍
@@joell439 😁
Wow.
That is so imaginitive I can't hardly find the words.
Genius does come to mind.
Hi, Thanks, but I must admit I didn't invent this, the idea came from a CNC video, and I adapted the concept to be driven by the lathe spindle rather than by a CNC controller. Still pretty awesome seeing flats appearing on a turning workpiece though.
Could you have the tools inside a "cup shaped holder" and drive the outside of the cup. With the part feeding into the centre. It might be a bit simpler and safer.
That's an interesting idea. I based mine on a CNC tool, but it is a bit scary as it is. Not entirely sure the geometry would work out though. I'll have a think. Thanks for the comment.
certainly shows promise, might even be able to use it as a tool post grinder as well!
I like your thinking, although it could only ever do external grinding as the drive spindle connects to the work. Thanks for watching
Brilliant work so far, I love the rotary cutterhead idea. Looking forward to seeing the completed steel version in operation. Tony
Thanks Tony, I will hopefully get to that soon. I've a fair bit of editing to do on quite a few videos to do first.
Very creative sir, and so far the coolest build of rough cut. Be safe DJ aka Foxberg
Thanks DJ. Not seen much from you lately, hope you're doing well.
@@ollysworkshop all is well, and all that is gone, I may make a vid or two on this channel, but the other two are gone. Along with my drive to really push the channels, the brain has shifted off that type stuff, and is just bouncing around, yet there’s nothing it’s latched onto like it ussually does.
Hello Olly,
I must admit I have not seen anything like that... I will for sure be turning in to see the full build, well done.
Take care.
Paul,,
Thanks Paul, I've got about 5 videos in the pipe waiting to be edited, so will be a few weeks before I get round to it - also I have to make it work a bit better first!
Paul, it’s Almost as strange as a bolt on surface grinder for a lathe.
Never seen anything like that before !
Hi Ian. It's based on a CNC tool. I've put a link in the description. Thanks for watching.
Wow Olly. That is some next level thinking. A few refinements and that will be brilliant.
Thanks Steve - the brain is already trying to improve the design, I would like to get it to a state where I can have a set of drawings that anyone could make.
eyup Olly
Ingeneus!! well thought out
cheers
Kev
Thanks Kev. If only my time management was as good!
What can you say about the needed diameter of the cutter wheel? I've seen several videos on how they work, how they were built, and so on, but nothing on that diameter.
Hi, I think the closer the diameter of the work is to the diameter of the cutting wheel, the more curved the cuts become. I haven't crunched any numbers, but I reckon approx 2:1 to 3:1 cutter to work diameter will be ok (larger is better), that's what I reckon just based on what I've seen on TH-cam.
Genius! Brilliant concept! 🧞♂️🎉🎊💥❤
I’ve seen other mechanisms tied to the feed shaft or the lead screw with universal joints, those seem like a headache. On the other hand yours is just small, simple and elegant.
I have 3 thoughts.
1. Wouldn’t there be a need for a floating idler? I can see that you use a screw to tension it. However, it doesn’t allow for movement on the transversal.
2. When moving the carriage the belt slides. Would you consider a pulley mounted on splines? You could move the pulley, as a whole, along with the mechanism.
3. Would larger pulleys give more surface to the belt? I would consider the height of the center.
Yes, I subscribed, i’d like to watch the build.
Thanks for the feedback, and I'm glad you found it interesting. The intention was very much that I wanted to create an attachment that would fit *any* lathe, not just my lathe, so I appreciate you noticing. I agree that the tensioning system needs much improvement, I have been thinking about how to make this work. If the tensioner doesn't take up the excess on both sides of the belt, then you end up with a non-integer number of teeth between pulleys, and it skips! I definitely did consider a pulley on splines, but I wanted to keep it simple as I didn't give myself nearly enough time to make it. That said, the long pulley works well, the belt moves across it as long as it's spinning. I'm hoping to have another stab at this sometime this year, so stay tuned! Thanks for watching.
It needs some fine tuning but you're on to a winner, great idea.
It certainly does, thanks for the support.
Great video, well done!! I'm sure you'll tell us what inspired you to do this, it's truly original.
Good luck from Spain!!
Thanks David, unfortunately it's not original, but I was inspired probably 20 years ago by a CNC machine video which was using this technique. It's been rattling round my head ever since.
@@ollysworkshop It's still a fantastic idea and you've added 3D printing into the bargain. I wonder if this kind of thing was done on capstan lathes back in the day? Well done and good luck completing it.
Awesome build. Why did it crash? Did it need more belt tension?
Hi, the crash was multiple issues, but belt tension was definitely one of them. I'm hoping to get the build video done this weekend and I'll discuss issues and improvements. Stay tuned!
Dear Olly - I used a Polygon devide many many years ago, but complicate to set and install - you idea is great and very innovative. May I access the drwgs? I am Brazilian living in Brazil.
I am working on the build video now. I will try and have some drawings ready to share when I release the video. Many thanks for your interest. 😀👍
Dear Olly, many tks for your answer. Hope to talk with you again and If you come or have any needs from Brazil, be my guest
Thanks Guido.
Using the 2:1 ratio is clever, that many less tools to adjust and perhaps better finishes?
might work better with a chaindrive the chainsprockets have longer teeth so it would take more effort to let them slip a tooth , can probably put more force behind the tensioner too
"but wat about being able to move it sideways then ?" eehm yeah you could have the sprocket on the chuckmount move sideways over a splined shaft (like a pto shaft ), might need a guide (fork) to hold it straight across the rest of the mecanism
might allso be that the toothed belt slipping is caused by swarf falling intoo the gear/sprocket causing the belt to lift out its teeth , was seeing that happening and figured you putting a splash shield over it at a later date
another idea could be to use an actual gearbox on the setup and use driveshafts with u joints to be able to change the distance between the driven and movable part , added bonus would be that you can do a chance of gears to go from 2 to 4 to 6 to 8 or how ever mush flats you want on there without adding more cutters (saves you from needing to set the height of each one )
would mean that unless you add a thirth gear the tool is spinning opposite the rotation of the part wish might make the cut more hollow (not flat)
Yeah, totally agree it needs something better, I just had all those bits lying around. I thought about a splined shaft and moving the gear/pulley, but when I realised I only had a couple of days to do it, I had to go with the absolute simplest implementation. There will be a mark II .....
Wow Olly, one word, Ambitious! What on earth did you eat or drink the day you came up with that idea? Fantastic proof of concept mate, I am really looking forward to seeing you mature this design. 10 out of 10 mate! Well done for even attempting this! Cheers, Jon
Thanks Jon. It certainly was ambitious - especially as I only started cutting metal on Friday morning (i had done the 3D prints beforehand). You would think I would have learnt from last year and done something simpler, but no. Keeps life interesting when you push yourself a bit though.