Lasercut Mendel90

by Think3dPrint3d, published

Lasercut Mendel90 by Think3dPrint3d Oct 22, 2013
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Lasercut Mendel90 by Think3dPrint3d is licensed under the GNU - GPL license.

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A modified version of the Mendel90 which uses a lasercut melamine coated MDF frame (same fixing idea as the graber i3 frame). It allows an acrylic enclosure to be fitted.

Main changes:

Frame re-designed, Z axis changed to laser cut parts.
Some plastic parts modified (not many)
Acrylic enclosure added
Wiring simplified - all motors have detachable plugs, endstops are push fit. this allows for a wiring loom to be used.
RAMPS electronics as standard with the Panelolu2 controller.

All the detail is available on our blog:

The assembly process in more detail in in this post: http://blog.think3dprint3d.com/2013/10/mendel90-lasercut-overview.html

The commissioning and calibration in outline is here:

The printer is designed from the start to take multiple bowden extruders as an alternative to a single direct drive extruder. Updates will follow!


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I'm about to cut the sheets for this, but I can't seem to find any square nuts that fit the slots. Is it me or are the slots to small? I measure them as 5,26mm x 1.65mm. The smallest square nuts I can find are 5.5 x 1.8mm

Comments deleted.

Hi, very nice mendel, enclosure is a big + :)
For the sake of curiosity, what speeds (perimeters and infill with a decent printing), do you reach on a "day-to-day" basis with such coated MDF framing ?

Hi Giles

We generally print at 40mm/s for everything.



Hi from Ian again, which of the DXFs are for the actual M90 chassis (sgraber's connections) Just before I order the laser cutting. I know I could look at the DXFs in inkscape I'm just being lazy!

Hey ian "T3P3_LC_M90_v1.0.dxf is the frame parts, the ones with "acrylic" are the enclosure. I do urge you to check the DXFs before you get it cut thought!

Hi from Ian, what thickness acrylic is recommended for the transparent box parts? and for the dibond ;)

Hi Ian

The design is for 6mm thick Acrylic and the frame is 6mm melamine coated MDF (which is actually 6.3mm thick)

Very nice design! I had half-toyed with doing a M90 LC but never got around to it. :) Glad to see someone did!

One thing you may consider (if you want more of it lasercut) is making the M8 y-smooth rod holders lasercut long with the y-motor and y-idler mounts. That would make 6 less parts you have to print. One additional idea would be to go to school off of Josef Prusa's y-carriage, where he cut LM8UU holes in the y-carriage and then ziptied the LM8UU's to the carriage. That would save 3 additional parts that you no longer need to print. Taking it a step further, you could make the y-belt-holders lasercut as well like what I did on the Prusa/Graber i3: https://github.com/sgraber/Graberhttps://github.com/sgraber/Gra.... That would be two additional parts that no longer need printing. If you implemented all three of these ideas, you'd save printing 11 parts overall. It's not huge, but it makes less parts you have to print if you're selling any sizable quantity of your M90-LC's...

Glad you like it, your fixing method for the i3 was very helpful (and now implemented in openSCAD for those who want to use it their projects -check out the source)

I toyed with making the whole lot lasercut and have ideas for the X idler and X motor brackets as well (that would have also shifted it to a vertical axis printer). In the end this is a compromise between printed and laser cut which gives me the flexibility to quickly change the design (no in house laser cutter yet!) while still having the advantage of a pre-aligned frame.

We shall see what happens in the longer term.