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More 3D design nonsense 692

Hero Member Posts: 980

JP ca

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Re: More 3D design nonsense
« Reply #30 on: August 09, 2017, 10:32:38 PM »
Did you source the CF domestically?

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Sr. Member Posts: 279
Re: More 3D design nonsense
« Reply #31 on: August 11, 2017, 09:12:36 PM »
I think the 3D printing will be easier if all the openings and holes point in the same direction. That will sidestep potential issues with overhangs, bridges and deformation.

I might also have split that long part, maybe along the middle. That way the 3D printing of each half could start off from with a big flat surface and build up towards the curved areas. Starting with a flat surface (on the equally flat 3D printers build platform) minimizes the need for supports and manual finishing work afterwards. Maybe I'm just lazy? (Ok, just asked here, and I have it from good authority that it is true  :D ).





 

 
« Last Edit: August 11, 2017, 09:13:45 PM by Vidar »

"If only simple wasn't so hard" - me
(Partial disclosure: I design tools for a living).
Head Turd Polisher Administrator He who has the most nuts, wins! Posts: 57,448 Optimum instrumentum est inter aures
Re: More 3D design nonsense
« Reply #32 on: August 13, 2017, 01:43:41 PM »
Did you source the CF domestically?

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Nope, from China (I think) on eBay.

Def

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Head Turd Polisher Administrator He who has the most nuts, wins! Posts: 57,448 Optimum instrumentum est inter aures
Re: More 3D design nonsense
« Reply #33 on: August 13, 2017, 01:48:02 PM »
I think the 3D printing will be easier if all the openings and holes point in the same direction. That will sidestep potential issues with overhangs, bridges and deformation.

I might also have split that long part, maybe along the middle. That way the 3D printing of each half could start off from with a big flat surface and build up towards the curved areas. Starting with a flat surface (on the equally flat 3D printers build platform) minimizes the need for supports and manual finishing work afterwards. Maybe I'm just lazy? (Ok, just asked here, and I have it from good authority that it is true  :D ).


That makes sense, which is of course why I hadn't thought of it.  There are several sections of that part that could be split, the way I designed it.  I could say that it is so obviously designed to be split that I must have meant to do it that way, but I'd be lying....  :ahhh

I'll admit my first response to that suggestion was "Oh great, more assembly and potential weak points" but as I pointed out before, I will skin it in carbon fiber (non locally sourced, but if I was to go into even limited production I'd probably rethink that as it took forever to arrive) it should be more than strong enough for anything I am going to do with it.

It is however a little thick, so I will need to cut some of the size out of it.

Def

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Sr. Member Posts: 279
Re: More 3D design nonsense
« Reply #34 on: August 13, 2017, 07:28:58 PM »
Personally I've ended up splitting pretty much everything that needs curved surfaces on all sides. At least my end results are better that way than going with a single part with supports.

(I make sure to add two matching blind holes in each split to make them easy to fit and assemble perfectly later using short pins).

For structural purposes I also try to orient the parts so that any areas in tension are built parallell to the build platform. That helps remedy the structural weakness between layers often introduced with 3D printing. Then again I don't use carbon fiber which should make that a non-issue. It will be interesting to hear your experiences with adding that. 





« Last Edit: August 13, 2017, 07:30:10 PM by Vidar »

"If only simple wasn't so hard" - me
(Partial disclosure: I design tools for a living).
Head Turd Polisher Administrator He who has the most nuts, wins! Posts: 57,448 Optimum instrumentum est inter aures
Re: More 3D design nonsense
« Reply #35 on: August 13, 2017, 10:47:11 PM »
Yeah, I am hoping the CF will make up for a lot of my mistakes!  :D

Def

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Sr. Member Posts: 279
Re: More 3D design nonsense
« Reply #36 on: August 13, 2017, 11:46:29 PM »
I'm pretty sure my mistakes can dwarf any fiber  :o :D But I usually also outlast and grind away mistakes through stubborn retries :)

(A few times that just ends up with me in a really deep hole though. Turns out the answer to "how hard can it be?" is sometimes "real hard").
« Last Edit: August 13, 2017, 11:47:32 PM by Vidar »

"If only simple wasn't so hard" - me
(Partial disclosure: I design tools for a living).
Jr. Member Posts: 70
Re: More 3D design nonsense
« Reply #37 on: August 22, 2017, 10:37:46 PM »
Grant, what kind of printer parts and materials are we talking about? Maybe someone here has a printer that can print them...

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Dutch_Tooler

Location: Southern Germany
Head Turd Polisher Administrator He who has the most nuts, wins! Posts: 57,448 Optimum instrumentum est inter aures
Re: More 3D design nonsense
« Reply #38 on: August 23, 2017, 05:30:12 PM »
It's just a simple carriage mount.  The new replacement hot end arrived yesterday but I haven't had a chance to install it and reassemble the machine yet though.

Def

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