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The FabMX 3D printer was designed to handle the (quite heavy) FabMX Pellet Extruder while keeping the printer compact and affordable.
Therefore this printer moves the print bed in two axes (a xy table) so the heavy extruder only has to be moved up and down (z axis).
It uses OpenBuilds linear actuators with modifications.

Specs:

Build volume: 165mm x 165mm x 150mm

Build Bed Size: max 165mm x 165mm

Based on Laser4DIY Low Profile XY Table
Uses 2 OpenBuilds NEMA17 V-Slot Actuators with Lead Screw for x and y axes (with modifications)
plus 1 Open Builds C-Beam Linear Actuator for z axis

Part Locations:

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License

This FabMX 3D Printer with XY table is licensed under the CERN-OHL-P v2.

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The "end plates" are made of 3 layers of lasercut aluminium, which are aligned and held together by M3 screws. It is also possible to have them CNC milled as one piece, but we chose laser cutting as it is much cheaper to get them produced this way.

Part Locations:

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Assembly

General notes:

Please see included STEP file where the individual parts go.
There are different types of slot t-nuts: slide-in and drop-in types. The slide-in type can only be inserted from the ends of the profile. If you have these types, make sure you insert the t-nuts at the right places before screwing on the endplates, otherwise they cannot be inserted any more
Make sure the motor orientation is correct, i.e. the cable connector is on the correct side. See STEP file.
The lasercut holes in the aluminium plates are often too small. Drill them out to have the right sizes so that the screws go through. The only exception are 4 holes in the bed plate (see below). These holes need an M3 thread to be cut into.

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Once all components are mounted, the heatbed heat bed is moved to the maximum position towards the z-axis. Then, when assured the relative position between extruder (z-axis) and bed suits the functionality of the printer, the table can be fastened onto the connection rail.

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Screenshot of CAD-Model as reference.

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