I have been posting about this on the Octoprint Forum but I think this is the better place to discuss this. I have a Prusa Mk3 which I build from the kit late last year and I am mostly happy with it but I very much dislike the looks of it and I have hopes 3d printing can go much faster. I have read and watched videos about the hypercube and the core-xy mechanics of the printer. It seems to have the potential to print a lot faster due to lower mass on the mechanical side in combination with a 32 bit controller. I have ruled out using China build core-xy kits, mostly cause I would just use the mechanics anyway as hotend and electronics are apparently of sub optimal quality. So here is what I have set as my main components to use.
Rat Rig V-Core Mechanics kit incl steppers but printed parts done myself from PC or PET
It comes from the EU, no customs and VAT drama, looks solid and well made. All parts available as Fusion 360 design. Easy to customise.
E3D Titan Aero (Aqua at a later stage)
Low build height and compact direct drive, never had bowden and it would be less mass but direct drive just gives me a better feeling. A bowden drive would be easy to implement for testing purposes if needed.
Duet 2 Ethernet
Looks like a very well made piece of kit, very comprehensive documentation and fast 32 bit platform. Great web gui and potential to use a very nice screen if needed. Build in ethernet is a must (wired, not WiFi), easy to extend with expansion boards and temperature probe interfaces if needed.
E3D Mains powered 300x300 bed
Just faster, more efficient than driving it from a DC PSU, removes the need of a massive 24V PSU
I have heard horror stories about the v-groove linear system, all of which referred to removing play or have to little play causing flats on the rollers. The V-Core has by the looks of it rather nice way of adjusting the play with eccentric nuts. I would try the v-groove system to start with but have the option of linear rails in mind. Also since its a nice cubical case I would like it enclosed once the first few months of testing resulted in a printer that has become “less fluid” in design when most parts have proven to work well.
I have not yet made up my mind about the following parts:
- End stops or no end stops
- Capacitive, inductive, BL-Touch or Pyr0-Piezo (hoping to buy a beta kit) bed leveling
- Dumb steppers or steppers with closed-loop (in the long run)
- Print surface, hard to get PEI coated spring steel, glass or some other solution
- 0.9 degree or 1.8 degree steppers in the long run.
I will order all the hardware later this week, just trying to see where to buy the stuff to buy most where there is stock available. E3D is pretty bad with delivery times these days.
Any input is welcome, especially about the points that are still floating unsolved or undecided.
PS: This is a learning project without the expectation for it to work perfect right away but with the general idea to get into 32 bit Duet 2 controller and core-xy for future expansion into larger print volume and tool changers for water soluble support and other tool heads. The RailCore II would have been my choice if it was available as kit in the EU but thats not the case.