Build Plate Design Hey Folks, I am currently designing a 3D printer and would like to know what you think about what I've come up with for the buildplate. - the print Surface will be 304x304 (buildtak on springsteel) - the sheet of spring steel will be held to the 8mm thick aluminium core with temperature resistant ferrite magnets - the aluminium core is heated from the bottom with a Silicone heater - below the silicone heater will be an insulation sheet - the whole buildplate will be mounted to the Z axis with 4 M5 screws. I am not entirely sure yet how I want to do the leveling. I am thinkting about 4 springs or with spacers. [attachment 109025 buildplate-AutodeskInventorProfessional2018.png] [attachment 109026 mount.png] [attachment 109027 heater.png] https://reprap.org/forum/read.php?14,842727,842727#msg-842727 Tue, 08 Sep 2026 01:50:15 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?14,842727,843030#msg-843030 Re: Build Plate Design https://reprap.org/forum/read.php?14,842727,843030#msg-843030 www.ebay.it] as in your favorite bar !]]> MKSA Mechanics Tue, 01 Jan 2019 01:48:30 -0500 https://reprap.org/forum/read.php?14,842727,843017#msg-843017 Re: Build Plate Design https://reprap.org/forum/read.php?14,842727,843017#msg-843017 the_digital_dentist Mechanics Mon, 31 Dec 2018 16:28:31 -0500 https://reprap.org/forum/read.php?14,842727,842988#msg-842988 Re: Build Plate Design https://reprap.org/forum/read.php?14,842727,842988#msg-842988
unfortunately I had to move to a smaller apartment temporary (1 room with my Girlfriend) and had to stomp the entire project due to insufficient space, planning and funding. This time I'm trying to utilise everything I've learnt to use different and easier approaches such as the now available Titan Aqua instead of a self built water cooled hot end (which worked like a charm but I was not Happy with the Bowden Setup in this size of a printer)

I think I will continue the development of my Printer in my old thread as soon as i'm on the building process again. Currently I'm mainly testing all sub-components (such as the build plate) to be able to make optimisations and add them to the final design.]]> forreason Mechanics Mon, 31 Dec 2018 08:41:46 -0500 https://reprap.org/forum/read.php?14,842727,842975#msg-842975 Re: Build Plate Design https://reprap.org/forum/read.php?14,842727,842975#msg-842975 reprap.org]
How did you build the bed ?]]> MKSA Mechanics Mon, 31 Dec 2018 06:12:25 -0500 https://reprap.org/forum/read.php?14,842727,842958#msg-842958 Re: Build Plate Design https://reprap.org/forum/read.php?14,842727,842958#msg-842958
Quote
the_digital_dentist
4 leveling screws doesn't make much sense if you recall from high school geometry that 3 points define a plane. See: [drmrehorst.blogspot.com]

When you heat the plate it will expand (about 0.5mm if you heat it to 100C to print ABS). That will push the leveling screws sideways and something will have to bend/move. Will your plate stay level or at least return to level every time it heats up? That potential problem can be mitigated by using a kinematic mount.

To be honest, I don't really bother about a 3 Point Leveling design. While it might be faster and more convenient, I don't plan to do bedleveling before each and every print. The Printer should be rigid enough to withstand some prints without further bedleveling required. With a 3 Screw design, I am a little worried about lost stability and more give. Not even that much on a level perspective but more on X/Y movement. Mark Rehorst from your post also outlines this:
Quote
Mark Rehorst
All are flat enough for edge to edge printing in 200 um layers. I can't say how big the bed can get and still be rigid enough to stay flat enough to print on with only 3 screws supporting it. That will depend on the thicknesses of the bed plate and the first print layer. Larger printers are typically used to print larger objects in thicker layers, and thicker layers are more tolerant of variations in flatness, so I suspect that 3 point leveling can be used to go quite a bit larger than 300 mm square, unless you're trying to print a 50 um first layer.

From my point of view, a 4 screw level design is just the same as a 3 screw design if treated correctly. Of course you are not supposed to pinch in two opposing screws like hulk and even then I believe the spring will have more give than outright bending the 8mm aluminium. The only difference is that the jaw and pitch axis are differently mapped and a screw is missing:
[attachment 109074 jaw.jpg]

The kinematic mount might be a thing that I have to consider. While I had no issues there in the past, with a wider, thicker bed issues might occur. I do not want to add unneccessary complex solutions that might bring other issues with them so I will just test it out practically.

Quote
o_lampe
Other people have used magnetic foil or sheet instead of seperate magnets

That's true. The BuildTak kit that I ordered comes with a sticky magnetic foil. The inserted magnets might as well cause issues. I will have a look out what works best for me.]]> forreason Mechanics Mon, 31 Dec 2018 04:46:05 -0500 https://reprap.org/forum/read.php?14,842727,842865#msg-842865 Re: Build Plate Design https://reprap.org/forum/read.php?14,842727,842865#msg-842865 o_lampe Mechanics Sun, 30 Dec 2018 02:49:12 -0500 https://reprap.org/forum/read.php?14,842727,842790#msg-842790 Re: Build Plate Design https://reprap.org/forum/read.php?14,842727,842790#msg-842790 drmrehorst.blogspot.com]

When you heat the plate it will expand (about 0.5mm if you heat it to 100C to print ABS). That will push the leveling screws sideways and something will have to bend/move. Will your plate stay level or at least return to level every time it heats up? That potential problem can be mitigated by using a kinematic mount.]]> the_digital_dentist Mechanics Sat, 29 Dec 2018 12:29:50 -0500 https://reprap.org/forum/read.php?14,842727,842779#msg-842779 Re: Build Plate Design https://reprap.org/forum/read.php?14,842727,842779#msg-842779 You will see the mistakes you already made.]]> MKSA Mechanics Sat, 29 Dec 2018 11:06:02 -0500 https://reprap.org/forum/read.php?14,842727,842727#msg-842727 Build Plate Design https://reprap.org/forum/read.php?14,842727,842727#msg-842727
I am currently designing a 3D printer and would like to know what you think about what I've come up with for the buildplate.

- the print Surface will be 304x304 (buildtak on springsteel)
- the sheet of spring steel will be held to the 8mm thick aluminium core with temperature resistant ferrite magnets
- the aluminium core is heated from the bottom with a Silicone heater
- below the silicone heater will be an insulation sheet
- the whole buildplate will be mounted to the Z axis with 4 M5 screws. I am not entirely sure yet how I want to do the leveling. I am thinkting about 4 springs or with spacers.

[attachment 109025 buildplate-AutodeskInventorProfessional2018.png]
[attachment 109026 mount.png]
[attachment 109027 heater.png]]]> forreason Mechanics Sat, 29 Dec 2018 03:57:56 -0500