Having a play around with a new printer design and using what I’ve learnt with the FB2020 to see if I can produce something a little better, the design is by no means finished. The Y Carriages, X Carriage and a few other bits need designing. Meet the AX-01.
The base of this is still a CoreXY with a build volume of 200 x 300 x 180(ish - can never work that out properly) built around a strong Cantilever Z Axis. L Shaped mount bolted to the bed plate supported on SC12LUU bearings and 12mm Rods. X & Y will use 10mm Rods with all rods being supported with SK type brackets.
Connection of extrusions will be a combination of metal brackets and bolting the acrylic to the frame, which should make for a very rigid solution.
X & Y will be a similar design to the FB2020, and will most probably just drop into the FB2020 if you exchange the X & Y rods for 10mm. Electronics-wise I’m looking at a 24v system running a AZSMZ or Azteeg X5 Min with a Viki v2 screen. All electronics will be hidden under and bolted to the internal base plate, think something like the Replicator.
Let me know what you think, and in before, why not use wheels on v-slot or linear guides, I’m trying to keep the price down, in the same ethos of the FuseBox and FB2020, yes there are arguments for and against, but this is my preferred solution.
Looks fine. Planning on fully enclosing for ABS?
@Ryan_Carlyle - not sure as yet. I’m thinking about adding clear removable windows to the sides for good access. That’s about ass far as I’ve got.
I am going to do my 2nd printer myself as well aimed at ABS, I need a bigger form factor something like 400x 200, not sure yet. height maybe 500mm.
Doors/sides seem essential to keep the heat in for ABS past about 180mm long? I was even thinking of a heated chamber so the stepper motors might need to be outside of the chamber? Looks like you are using 8mm? rods? PPl comment these are not rigid enough, so I was thinking of using three of these in a H pattern but that is as far as I have got. So buy 6 of these, use 4 for the top “lip” and one as the cross gantry http://www.aliexpress.com/item/V-slot-rail-aluminum-profile-extrusion-2020-6pcs-60cm-Cutted-CNC-machine-building-Part-Holder-work/32286183845.html?spm=2114.13010308.0.67.9jlmSQ Then as the guides / runners use these, http://www.aliexpress.com/item/HIWIN-linear-guide-1set-MGN9-L400mm-Miniature-linear-guide-MGN9C-linear-carriage-bearing-linear-guide/32301494772.html They should be failry light to keep the mass down.
Rule of thumb for moving steel rods (eg gantry bridge) is L<D*25. You can push stationary rods a bit longer than that. You don’t get much length out of 8mm before they start to add a lot of ringing.
12mm Z, 10mm X & Y. The FB2020 runs 8mm on the XY and handles 120mm/s base speed with slowdowns. 10mm rods are a trade off on moving mass and inertia but I run a minimum of DRV8825s with active cooling, so they can handle it with ease
It’ll work, but you’re pushing it. If you want to reduce moving mass, turn the coreXY mechanism 90 degrees. You can have the motors in the same location, just get a little creative. This will reduce the mass of the rods that move by 100mm.
Dammit @Stephanie_A , I love different designs, and things that aren’t quite standard. I’m now going to have to sit down and work it out…
Core-xy is surprisingly versatile, you just need to think outside the box. All you need is a drive on one belt, and one on the other, it doesn’t matter where the motors are. The belts don’t even need to cross, one belt can loop on the left side, the other on the right.
If you can manage it, you’d be able to extend the x axis to practically any length without consequence of added weight.
Yep I was thinking that but the contraction forces? What’s the practical limit on ABS in X? I was thinking a heated chamber but then the components inside have to suffer an elevated temp in the “oven” Some could be moved out but others not, so water cooled? starts to get so complicated! ikky.
