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Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

Monster Kossel v2

by goeland86 May 13, 2018
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Hi, I am curious as to how you ordered that heat bed. I went to the site and I didn’t have the option to ship to the US. It’s next to impossible to find an Aluminium heat bed that size for 24v

Hi, yes the site is a local Swiss company and they don't ship world-wide, I apologize for that.

What I can suggest instead is using a borosilicate 350mm bed from tridprinting with a matching kapton heater underneath: http://www.tridprinting.com/Heated-Bed-Components/

Or, the folks at bitraf have milled their own bed out of a large aluminum stock and are using a kapton heater underside in a similar way.

The Monster Kossel is, obviously, limited to what you can source for your materials. The size of the bed when using the 450mm extrusions for the triangle frame is 350mm in diameter. I built the one at bitraf with 500mm extrusions because the rods they have are a bit longer and I didn't want to have to re-size the 500mm extrusions to only 450.

This printer design is meant to be something you take ownership of - I give you the general blueprints and assembly instructions, but if you're building one, I assume you're a maker : customizing it with what you can find and to suit your needs is exactly what I've got in mind for this machine :)

Is it possible to just use the bottom vertices on top so I can mount the motors and electronics at the top? So basically print out 6 bottoms?
Thanks for the great design.

Yes, there's no reason you couldn't. However you'd be losing a lot of vertical height that way, as the bottom corner are quite tall.

If you're interested in having the electronics in top, I'd print out the 3 top and 3 bottom corner as normal, but then put a solid bottom plate under the top frames as the base for the printer, and screw the frames and tower extrusions into it (the open builds have an M5-compatible hole in the center). This would give your bottom base the rigidity you need without losing in vertical build height.

Or, you can just put taller vertical extrusions, if you can make them fit in your workshop. ;)

Hi, I'm opting to build a large Delta and i really like what you came up with. Would it be too much to ask you to modify the corners for 2020 extrusions instead of 1515s, as it really impossible for me to find this size?
Thanks a lot

Hi Mikepol,

I can try and redraw the files for 2020 extrusions intead of the 1515. However I am currently swamped at work, so I can't guarantee it will be soon. I will work off the OpenBuilds 2020 extrusion profile as a basis - just so you know what reference profile I'm using.


Nevermind if you are busy, thank you for the goodwill though, i will try and rework them from the stl files.
Best regards

Hi, just pinging you to let you know that 20x20 extrusion-based corners are now available. I've managed to build a frame based on those as well, so I can vouch they will work.

In case you missed it - I added 20x20 corner files, and even built a frame based on them.

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