3D Printed 32 Line Mechanical Television System

Forum for discussion of narrow-bandwidth mechanical television

Moderators: Dave Moll, Andrew Davie, Steve Anderson

Re: 3D Printed 32 Line Mechanical Television System

Postby Andrew Davie » Fri Mar 10, 2017 7:37 pm

Another option which seems sensible is to print the disc in two halves - front and back. Sandwich the beads between each, glued together. Then the bead holders would be in little "cup" shapes, which would be really easy to print, and both surfaces would be glassy smooth (because the surface that sits on the print bed has a totally flat base, whereas the upper surface of your print is a bit rough due to the filament "ripple".
User avatar
Andrew Davie
"Gomez!", "Oh Morticia."
 
Posts: 1583
Joined: Wed Jan 24, 2007 4:42 pm
Location: Queensland, Australia

Re: 3D Printed 32 Line Mechanical Television System

Postby gary » Fri Mar 10, 2017 8:07 pm

and safer too, should you do what I did and run the camera into the beads...
gary
 

Re: 3D Printed 32 Line Mechanical Television System

Postby Andrew Davie » Tue Mar 14, 2017 12:24 pm

nip.jpg
nip.jpg (140.29 KiB) Viewed 3456 times


That's the latest prototype and the first with all holes clear. My views on printing Nipkow discs are that the hole size is never going to be consistent. What I'd be doing if I were trying to make a disc to use would be to have holes in the first few layers, very tiny. If they're filled in that's OK, because the slicer puts boundary circles of filament around where the holes are. Very obvious under magnification. I'd print the majority of the disc as a solid (no holes, at least no scanline holes). Then I'd post-process the disc by pushing a hot pin through where the hole positions are clearly marked, or by drilling. You'd have a consistent size and pretty accurate positioning, IMHO.

With so many holes, the pattern of printing is complex, and the disc isn't "smooth". With just the first few layers having the holes, this can be avoided and get a much better and structurally sound disc print. I'll do one soon and see how it works out. That is, shallow holes for just the first few layers, and then solid for the rest. Use a dremel to drill out to exact size - given a really precise position already marked by the printer first few layers.
User avatar
Andrew Davie
"Gomez!", "Oh Morticia."
 
Posts: 1583
Joined: Wed Jan 24, 2007 4:42 pm
Location: Queensland, Australia

Re: 3D Printed 32 Line Mechanical Television System

Postby ON4AIJ » Thu Apr 09, 2020 7:43 pm

Can i have de stl file of the disk please , i will try with my 3D printer
ON4AIJ
"Fester, enough of the light-bulbs!"
 
Posts: 3
Joined: Thu Apr 09, 2020 3:31 am

Re: 3D Printed 32 Line Mechanical Television System

Postby ON4AIJ » Thu Apr 09, 2020 11:44 pm

can i have the stl or scad file please
i have one maked but is not zo good
Attachments
DSC01985.JPG
oke
ON4AIJ
"Fester, enough of the light-bulbs!"
 
Posts: 3
Joined: Thu Apr 09, 2020 3:31 am

Re: 3D Printed 32 Line Mechanical Television System

Postby ON4AIJ » Fri Apr 10, 2020 9:16 pm

I really like this "3D Printed Bird Inspired 32 Line Mechanical Television System" are the source code and schematic still available somewhere
I think it is without SD card and nextion LCD display
If so, please send it to me
erwin.meyvaert@telenet.be
ON4AIJ
"Fester, enough of the light-bulbs!"
 
Posts: 3
Joined: Thu Apr 09, 2020 3:31 am

Previous

Return to Mechanical NBTV

Who is online

Users browsing this forum: No registered users and 9 guests

cron