IMAC Scratch build Laser 200

As I said right from the beginning, it will be slow for now since its summer and more time for flying but here are the first parts done with my trusty 3D printer the bottom bulk heads, they are 4mm thick and weigh less then plywood and more rigid

What material are they and how do you bond them to other parts?

Forgues-Research said:

here are the first parts done with my trusty 3D printer the bottom bulk heads, they are 4mm thick and weigh less then plywood and more rigid

Click to expand...

PLA? PETG? What percentage infill if any? Very intrigued that they are lighter than ply! 4mm is a good choice for thickness in my opinion, if any smaller it wouldn't have anything to bond to and would be subject to flexing. I've never played with bonding 3DP parts, I am also curious what your method is/will be

Also, have you tried lightening holes?

The material used is PLA plus, thickness 4 mm fill 100 % . I tested using CA with hard wood , bond is as good as on wood, . I will do a proper weight testing with this and plywood,

As for flexing, I am using this only for these bulkheads since the only strenght needed is in compression,

Since I am not ready to assemble anything yet, I will do more testing then I already did, and will report back

Forgues-Research said:

The material used is PLA plus, thickness 4 mm fill 100 % . I tested using CA with hard wood , bond is as good as on wood, . I will do a proper weight testing with this and plywood,

As for flexing, I am using this only for these bulkheads since the only strenght needed is in compression,

Since I am not ready to assemble anything yet, I will do more testing then I already did, and will report back

Click to expand...

Correction, the infill is 20%, not 100%, my bad information. Stay tuned , I have glued a piece of Pine same as I will use for stringers to an exemple , and will break it off via video so we will know

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If I understand you correctly the bulkhead that the stringer is being glued to is made in a 3D printing machine. So why can you not make it wider at the locations we’re the stringer is glued to a bigger and better glue joint.

Snoopy1 said:

If I understand you correctly the bulkhead that the stringer is being glued to is made in a 3D printing machine. So why can you not make it wider at the locations we’re the stringer is glued to a bigger and better glue joint.

Click to expand...

Well. Not a bad idea. Imagine they are built flat. One could extend the material at the outskirts of the areas that the stringers attach to. It all boils down to how much time you want to invest in it. I would think lightening holes and beefed up supports would be the way to go. Look at modern carbon formers... not much there. It definitely plausible. Just a considerable amount of time drafting, printing, testing, repeat to make it just right whereas a solid piece is sufficient and sounds like lighter than the ply!

The time factor, which of the three is the time consuming, drawings, printing, and testing. Testing I get sometimes when it is done you say to your self by making small adjustments it will be better, stronger and or lighter.
In which format are the drawings done and how is it presented to the printer.