This KARYA3D printer is small Delta printer, the 2D design can be printed on A4 paper.

Printer Dimension Width 250x220x400
Rod length - recomended 170mm

Build volume : Aproximately Hexagonal width 176x height 153
Joint : Threaded M4 Steel Ball 10mm, hold by string

Motion Motor : NEMA14
Extruder : Nema17

If need bigger print volume, please edit the freecad file. Print using A3 printer and repeat the same process, except the ROD must be longer too. My simple rules is the rod length is your desired diameter build volume + 3cm, and the printer height is your rod length+ desired build height.

I use small motor with build in MXL pulley. So i need to divide MXL belt into 2 3.5mm width belt.

STL files name are bad because some of them are on different documents on onshape. Sorry for that hehehe.

Test Printing
https://youtu.be/X9-QCsylixo