Your design philosophy and methodology are first-rate. A fitting example for anyone learning parametric design (like me!). Thank you for taking these videos public.
Great video and explanation!!! I was wondering why you did not leave any clearance between the bearing and the races. I believe that this is the reason why the bearing is too tight. I think this is the next step.
Yeah, I figured I would need to come back and add some clearance but just wanted to make sure it was really going to be needed. You got it, we'll explore this in the next video.
The tight fit is due to interference between the flat end faces of the rollers and the circular groove. To avoid this, the flat ends of the rollers should be spherical in theory. Run an interference analysis between one of the plates and one roller to picture it In practice, you can make the rollers a bit shorter than they are wide to accommodate See my comment on the first video
I wanted to comment that, astoundingly, I just finished watching another YT video of someone making this almost identical design (not Robert). "3d printin" (not a typo). You may be interested in watching how he accomplished a very low friction design.
Wait. Wait. Wait.... YOU CAN CHANGE THE DIMENSION CONSTRAINT TO THE TANGENT OF AN ARC?!? 🤯 The hoops I have been jumping through to position arcs where I want them... 😳
Looking forward to the next video. I’ve never really understood 3d plastic bearings. What are you gaining by even having the roller bearings vs a plain bearing. In this case how are the rollers actually better than leaving them out. I understand the intention and how it works with metal bearings, just doesn’t seem to work with plastic tolerances and durability.
All good questions. Well, the reason for going with the roller bearings is that 3D printers do much better with printing cylinders vs spheres. As far as wether the bearings actually add something vs leaving them out. I guess I'll have to test. Will explore these in the next video.
Very good explanation about your method of choice on making the bearing. Thank you.
Thanks @lroyson. Glad to hear you're finding it helpful!
Your design philosophy and methodology are first-rate. A fitting example for anyone learning parametric design (like me!). Thank you for taking these videos public.
Thanks Denis!
Great video and explanation!!! I was wondering why you did not leave any clearance between the bearing and the races. I believe that this is the reason why the bearing is too tight. I think this is the next step.
Yeah, I figured I would need to come back and add some clearance but just wanted to make sure it was really going to be needed. You got it, we'll explore this in the next video.
The tight fit is due to interference between the flat end faces of the rollers and the circular groove. To avoid this, the flat ends of the rollers should be spherical in theory. Run an interference analysis between one of the plates and one roller to picture it
In practice, you can make the rollers a bit shorter than they are wide to accommodate
See my comment on the first video
Yeah, the interference suggestions is a good idea. I'll run it in the next video. But I suspect you're right with friction giving it a tight fit.
I wanted to comment that, astoundingly, I just finished watching another YT video of someone making this almost identical design (not Robert). "3d printin" (not a typo). You may be interested in watching how he accomplished a very low friction design.
Cool, I'll check it out. Can you post the link? I searched 3D Printin but not coming up with anything.
@@DesktopMakes th-cam.com/video/ywNFek70BjI/w-d-xo.html
Wait. Wait. Wait.... YOU CAN CHANGE THE DIMENSION CONSTRAINT TO THE TANGENT OF AN ARC?!? 🤯
The hoops I have been jumping through to position arcs where I want them... 😳
Yeah, it's a great little hidden gem!
Looking forward to the next video. I’ve never really understood 3d plastic bearings. What are you gaining by even having the roller bearings vs a plain bearing. In this case how are the rollers actually better than leaving them out. I understand the intention and how it works with metal bearings, just doesn’t seem to work with plastic tolerances and durability.
All good questions. Well, the reason for going with the roller bearings is that 3D printers do much better with printing cylinders vs spheres. As far as wether the bearings actually add something vs leaving them out. I guess I'll have to test. Will explore these in the next video.