exxos blog - random goings on

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Re: exxos blog - random goings on

Post by exxos »

rubber_jonnie wrote: Thu Oct 12, 2023 3:53 pm BTW, you said the chair has a foot rest, does that mean you never rest your feet on the floor? That could add a lot of extra stress at the top of the gas strut.
I bought the chair as it had a foot rest, thinking its a huge "lever" on the pison, so the chair *should* have been stronger. But it wasn't. I never use the foot rest even.

Incidentally that new piston I fitted not long ago seems be awfully wobbly as well. I doubt that will last much longer either.
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Re: exxos blog - random goings on

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Still going :hide:

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Re: exxos blog - random goings on

Post by rubber_jonnie »

exxos wrote: Thu Oct 12, 2023 4:11 pm Still going :hide:


IMG_1394.JPG
Assuming that's 100% infill?
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Re: exxos blog - random goings on

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rubber_jonnie wrote: Thu Oct 12, 2023 4:14 pm Assuming that's 100% infill?
Not exactly no. I explain something about this a few post back. Its only 10%, but I am using 20 outerwalls, so almost does the same job. But some parts in the center will soon show the 10% fill. Which is just as well because it is getting awfully "lumpy" there :roll:
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Re: exxos blog - random goings on

Post by rubber_jonnie »

exxos wrote: Thu Oct 12, 2023 4:17 pm
rubber_jonnie wrote: Thu Oct 12, 2023 4:14 pm Assuming that's 100% infill?
Not exactly no. I explain something about this a few post back. Its only 10%, but I am using 20 outerwalls, so almost does the same job. But some parts in the center will soon show the 10% fill. Which is just as well because it is getting awfully "lumpy" there :roll:
Okey dokey.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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Re: exxos blog - random goings on

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Still going :roll:

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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
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Re: exxos blog - random goings on

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Finally! Watch it not fit at all now :lol:

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Re: exxos blog - random goings on

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I think getting a metal one printed is a bit out of the question :roll:

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Re: exxos blog - random goings on

Post by stephen_usher »

Why not make up some box girder and attach it using a bolt going through the two sides of the seat frame and fit a reenforcing ring for the piston to fit into? Then, when it breaks you can unbolt it and fit another one.
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Re: exxos blog - random goings on

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stephen_usher wrote: Fri Oct 13, 2023 1:17 pm Why not make up some box girder and attach it using a bolt going through the two sides of the seat frame and fit a reenforcing ring for the piston to fit into? Then, when it breaks you can unbolt it and fit another one.
Sounds like basically what it had before, though no idea about how it actually construct such a thing.

It would probably be cheaper to get a engineering place to make something out of aluminium.

Only other possibility , is to use this stuff which seems be about the strongest material and process.

https://3d.jlcpcb.com/help/article/200-PA12-HP-Nylon

EDIT
saying that..
PETG also has higher flexural strength at 70-90 MPa compared to 50-70 MPa for PLA+. These superior mechanical properties make PETG the ideal choice for high-stress applications like mechanical parts, tool handles, fixtures and functional prototypes.
So getting one made in China probably won't be much stronger than the ones I am printing now anyway.

Indeed "high-stress applications" :lol:
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
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