Huxley Y-Chassis and Bed Templates
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Published on October 27, 2010
Description
I have been building an extended Huxley based on the standard parts but with slightly longer frame rods etc.
When it came to cutting out the Y-Chassis (Squashed Frog) and print bed I couldn't find a suitable CAD file with hole centers and dimensions. I prefer to drill corners that have an internal radius as trying to cut them with a saw is very tedious.
The files here are reverse engineered from the Y-Chassis .STL file and the dimensions for a standard print bed and an extended print bed.
The master .SVG file was created using Inkscape on Ubuntu and is set up as layers so that you can turn off the stuff you don't want to print when creating templates. There is also a .PDF for folk without access to Inkscape.
When it came to cutting out the Y-Chassis (Squashed Frog) and print bed I couldn't find a suitable CAD file with hole centers and dimensions. I prefer to drill corners that have an internal radius as trying to cut them with a saw is very tedious.
The files here are reverse engineered from the Y-Chassis .STL file and the dimensions for a standard print bed and an extended print bed.
The master .SVG file was created using Inkscape on Ubuntu and is set up as layers so that you can turn off the stuff you don't want to print when creating templates. There is also a .PDF for folk without access to Inkscape.
Instructions
To get accurate dimensions print the template and then measure the edges of the Standard Huxley print bed outline. This should be exactly 110mm by 140mm. If this is not correct use the scaling setting for your printer to correct and reprint it.
When you are happy with your scaling print out the templates and either use the Toner Transfer method or stick it to your sheet material. Mark your hole centers using a punch then drill and cut out the part/s you need.
When you are happy with your scaling print out the templates and either use the Toner Transfer method or stick it to your sheet material. Mark your hole centers using a punch then drill and cut out the part/s you need.
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License
Huxley Y-Chassis and Bed Templates by aka47 is licensed under the Creative Commons - GNU GPL license.
More from aka47
Wait, you're using a standard-sized frog with the large platform, putting the mounting screws in the middle of the platform? Even if you countersink them and place a separate build surface over the screws, this will make adjustment more tricky, and may reduce stability. My Huxley with a 200x200mm platform uses a larger frog (closer to the size of Mendel's), scaled to the full width of the platform and also a little longer (along the machine's y axis) than the original.
Yes it's intentional.
I have measured up the length of travel-able Y-Axis free rail at 300mm and the frog length at aprox 85mm.
To get 200mm of travel (no point in having less if I want to print onto a 200mm bed) I subtract one from the other and see what I have left giving about 215mm of potential travel.
The 15mm
remaining is spare space to account for the fact that the frog will be unlikely to go fully to each end for a bunch of mechanical reasons.
Having kept the length the same it sort of made sense to keep the width the same. The frog being wider than long means that the mounting screws are closer to th
e edges in this direction anyway.
How wobbly if at all I will find out when it is put together. I don't anticipate it being an issue as the bed is very lightly loaded when doing FDM. If I wanted to route or mill using this machinery I agree the frog would need to be bigger to counteract the forces.
The screws will indeed be counter sunk stainless steel and ultimately (first bed for a quick hit will be acrylic) with a heated bed will be covered over by kapton tape. The Bed will be sprung so adjustment wont be an issue. I may need to redesign the roller brackets to take nylock M3 nuts yet.
La
stly I wanted to enable making the Huxley in it's original dimensions as well so fitted both into one set of drawings.
It's all a bit fun, unconventional and experimental.
*DONT_KNOW*