3D printed drawing machine

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Downunder35m
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Re: 3D printed drawing machine

Post by Downunder35m »

A bit off topic, so skip it if you like ;)

I noticed upon checking my design by matching up the 3D models in sketchup that the real movement created by the gears is relatively minor.
In terms of the drawing mechanism I mean.
The machine is much smaller than the Cycloid or othe wooden drawing machines - at least at this basic level and without glueing gears together.
As a result tolerances quickly add up :(
After all the actual drawing area is just abut 15cm, usable about 14 in diameter.
The teeth are not a big issue here once properly worn in as they have a 25° pressure angle.
But free play in bushings and mounts for the slider holding the drawing bar would create rather nasty jumps and jerking depending on how extreme you mount and combine things.

So I once more create new t-mounts and will add another spacer to allow the gear to mounted spinning but basically free of play in the x and y direction.
Take some more sanding but well worth it I think.
Next issue I encountered in the 3D model is height.
The drawing arm must be mounted above the nut and bolt holding the gear.
Being printed means I can't use flat nuts and fine pitched threads or a clamping mechanism.
So the mounts for the arm need to be solid from the nut up and also have a similar bushing as the gear itself.
A slotted drawing bar as used by the Cycloid works great in wood but no in plastic, especially not if you need to keep things sturdy AND moveable with little play.
With little control over how other slicer will create an infill pattern I need to desing a light weight bar from several parts that combines allow for as little flex as possible - while keeping the material costs low.
Every time you get close to the finish line you see another deep vally and long climb ahead of you LOL
Don't even want to think about the nighmares when trying to add stacked gears.....
Exploring the works of the old inventors, mixng them up with a modern touch.
To tinker and create means to be alive.
Bringing the long lost back means history comes alive again.
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Orngrimm
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Re: 3D printed drawing machine

Post by Orngrimm »

Downunder35m wrote: Wed Nov 11, 2020 1:08 am Never thought I would say I need a faster or a second 3D printer :(
<me, looking at his 3 printers...> Uh... Riiiiight.... :roll:
Builder of stuff, creator of things, inventor of many and master of none.
Tinkerer by heart, archer by choice and electronics engineer by trade.
Downunder35m
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Re: 3D printed drawing machine

Post by Downunder35m »

Just when you start smiling and think things work out for once :(
Took me a few days to create a nice drawing bar.
The first few test cranks were fine, then the first screw mount cracked away - seems someone was a bit low on the infill :(
Got a spare and tried again.
Slipped off the crank handle and broke the drawing bar - back to square one now for a design that is sitting further down on the gears and probably doing the initial one in wood as it is just quicker to do.
Have to find a way to make the gear mounts much shorter, don't want to use metal screws or such, so.... LOL
Exploring the works of the old inventors, mixng them up with a modern touch.
To tinker and create means to be alive.
Bringing the long lost back means history comes alive again.
BobbyLuashy
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Re: 3D printed drawing machine

Post by BobbyLuashy »

A 3D printed drawing machine is a machine that uses a 3D printer to create drawings or illustrations. It typically uses a combination of a robotic arm or gantry system to move the print head, and software to control the movement and create the desired image. These machines can be built using open-source or commercial 3D printer designs and can be programmed to create a wide range of drawings and illustrations. The use of 3D printing technology allows for greater precision and control in the drawing process, and the ability to create more complex and detailed images.
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