Mini 3D printer

thingiverse

I had remaining parts from the construction of my printers so decided to build a little one to test firmwares. The printer doesn't have a control box for this reason. The printing area is 125x138x95 high and is sufficient to get an idea if a firmware works correctly before passing it on to the printers I normally use. It was made in PLA but later it was necessary to build some parts in dense aluminum because it was too light and moved on the bench, so I realized the base parts with 2 kg of aluminum. The original Sketchup file is attached. For the hot end fan duct I used the customizer of https://www.thingiverse.com/thing:988310 and then modified it to have a fit for the PLA fan. For the radial 50mm fan in the draw I used this thing: https://www.thingiverse.com/thing:1077412, thanks to both designers for the files. I used 4 NEMA 17-2A-59Ncm motors that are wasteful but there were only them in my drawer. The non-printed parts are the 8mm steel rods and the LM8UU, an E3D V6 self-made, some aluminum screws for bed adjustment and screws needed to assemble it, wires and connectors, 12V100W adhesive heating surface. I don't build it for printing but it prints! Not like my other printers but acceptable. June 2, 2020: Tested the printer with MKSgen 1.4 and 4988 with good results, then tested SKR 1.4 Turbo with TMC5160 and had a better finish of parts printed as well as minimized working noise. UPDATE June 12, 2020: The 8mm rod lengths are X=265mm; Y=250mm; Z=250mm X rods aren't fixed by screws, only print the part then pass an 8mm reamer (not a drill bit!) and put the rod in the holes, they will enter forced enough to stay in place. Y rods are fixed by 4MA screws. Z rods need to have 4MA threads at the ends to be fixed. After a lot of use I noticed that it's necessary to protect the lower bearing of the X carriage with heat insulation because the hot-end fan shoots many heat on it, I protect the part with a layer of ceramic fiber.