3D Printed Bicycle
Posted: Tue Jun 09, 2020 5:40 pm
Following some posts on Riks' CDR Railcar No.10 thread, I thought it better to start a new thread rather than hijack Rik's, since it is only of passing relevance.
So, my original post is copied here:
++++++++++++++++++++++++++++++++++++++++++++++=
" I had another trawl around for bike files and came up with this one on Thingiverse:
www.thingiverse.com/thing:4050110.
By reducing the drawings to 40% on the slicer it comes out at about 95mm long which is again about right for a 16mm bike. An hour or so printing and 20mins assembly of the half a dozen component pieces got me this ( in works grey and still needing a clean up.):
The files are labelled in Dutch ( I think) and that would explain the front carrier which would be unusual on a UK mans bike. It actually comes with the file to print a crate to sit on the front, but after a 60% size reduction it was too flimsy to print properly and I think I'll take the front carrier off, a couple seconds with a scalpel should deal with that.
The only other detail which is missing are the chain sprockets, and they would be easy enough to make up from a piece of styrene."
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
I then decided that printing a clip-on sprocket and chain would be better looking. That was simple enough to draw up and print, but having attached it, I realised that the original drawing is very 'flat' and my new attachment was sitting outside the bike frames.
So, then I had to alter the drawing and widen it to get it to sit inside the forks. That opened a whole can of worms because I was trying to alter .stl files and not actual modelling files. The final version has solid forks rather than the correct inverted Y shape, but it looks OK from a distance.
The original pedals module fitted over the bottom point of the frames, but that no longer worked with the chain sprockets in the way, so I had to split them and make them attach separately.
The next problem was that the handlebars now looked too narrow for the wider frame, so they had to be altered and made wider.
Whilst I was at it, I added a tyre pump to the top edge of the frame, but its a wee bit small to print properly.
The final result is OK although not brilliant, and is a classic case of, "If I was going from here to there, I'd start from somewhere else"! In hindsight it would probably have been quicker and simpler, and possibly more accurate to have started from scratch, but getting the dims of a vintage bike is a problem these days.
If anyone wants the stl files, drop me a PM with an email address and I'll send them on.
So, my original post is copied here:
++++++++++++++++++++++++++++++++++++++++++++++=
" I had another trawl around for bike files and came up with this one on Thingiverse:
www.thingiverse.com/thing:4050110.
By reducing the drawings to 40% on the slicer it comes out at about 95mm long which is again about right for a 16mm bike. An hour or so printing and 20mins assembly of the half a dozen component pieces got me this ( in works grey and still needing a clean up.):
- file.jpg (124.15 KiB) Viewed 5060 times
The only other detail which is missing are the chain sprockets, and they would be easy enough to make up from a piece of styrene."
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
I then decided that printing a clip-on sprocket and chain would be better looking. That was simple enough to draw up and print, but having attached it, I realised that the original drawing is very 'flat' and my new attachment was sitting outside the bike frames.
So, then I had to alter the drawing and widen it to get it to sit inside the forks. That opened a whole can of worms because I was trying to alter .stl files and not actual modelling files. The final version has solid forks rather than the correct inverted Y shape, but it looks OK from a distance.
The original pedals module fitted over the bottom point of the frames, but that no longer worked with the chain sprockets in the way, so I had to split them and make them attach separately.
The next problem was that the handlebars now looked too narrow for the wider frame, so they had to be altered and made wider.
Whilst I was at it, I added a tyre pump to the top edge of the frame, but its a wee bit small to print properly.
The final result is OK although not brilliant, and is a classic case of, "If I was going from here to there, I'd start from somewhere else"! In hindsight it would probably have been quicker and simpler, and possibly more accurate to have started from scratch, but getting the dims of a vintage bike is a problem these days.
- DSC_0003[1] small.jpg (133.59 KiB) Viewed 5063 times
but I thought you might be interested 
