Initially, I had the idea to rebuild my old (outdated and partially broken Reprap/Prusa) into a robust 20x20 frame. I also wanted to have a larger (especially in z direction) build area and a to have an isolated build chamber.
Well, this is what came out.
It has the following features and drawbacks:
- Everything is robust :) With the right tools, etching and milling (in wood) should be possible.
- Everything is in a box.
- Build Volume is 200x200x400, although you can print up to 250x250x400 Vases that start on the 200x200 footprint.
- It's an easy and well proven design. It fixes z-wooble, z-inaccuracy and z-backlash issues by using using backlash nuts, by using a fixed (in z-direction) lead-screw and by fixing the z-axis in a robost frame.
- Well, it's not optimal with respect to build volume, if you want to maximize it out, you should go with a nice CoreXY design.
- Well, it's also not optimal with respect to maximum speed, since you have to move the mass of the build bed in y-direction.
Don't start building as long as it's work in progress!
BOM is not yet complete!
Frame (20x20 extrusion profiles)
Required Printed Parts
- 1 * z-axis-clamp.stl
- 1 * z-axis-clamp-left.stl
- 1 * z-axis-clamp-left-top.stl
- 1 * z-axis-clamp-right-top.stl
- 4 * y-axis-clamp.stl
- 2 * z-motor-mount.stl
- 1 * y-idler.stl (I don't like it yet)
- 1 * y-motor-mount.stl
- 2+ * extruder-mount.stl
- print my Customizable FilamentGuide for MK8 Extruder Drives for each Extruder https://www.thingiverse.com/thing:2774758
- 2 * 1.8 Degree 2.4A Stepper for Z-Axis
- 1 * 1.8/0.9 Degree 2.4A Stepper for X-Axis
- 1 * 1.8/0.9 Degree 2.4A Stepper for Y-Axis
- 2 * 850mm GT2 belt for X-Axis and Y-Axis
- Dial Indicator
- Cable Clips print 20+
- Check left Z-Axis Clamp, clamp screw length should be below 40mm
- Endstop Mounts, glue with hotglue works, but I dont like it:)
- Although, my anti backlash mechanism for z-axis is working, I don't like how it has to be adjusted. Right now, I managed to get a consistent backlash of 0.08mm on both z lead screws. Not sure if it can be further reduced due to tolerances of lead screw... So, if I ever redesign the x-axis again, I would like to integrate the z-backlash mechanism somehow.