I want a small portable 3D printer with a high quality printing results. I have Mini Fabrikator II printer, which is pretty small and light. But the quality is not good enough for me. And it's also a bowden printer with it's own flaws. So the mission is to design and build small direct 3D printer.
I rarely design something beforehand, so going to design it partially on a fly. And here I'll write about it's progress. Enjoy!
At the end of this page I'll list parts I used and their sources and prices.
First idea was to use 8mm rods. But at the same time I was curious about rails. What if I'd use a rails for it? So I went with the rail idea. As a printhead I've planned to use E3D's Titan Aero extruder.
2019-12-12 E3D released a new, smaller and hopefully better extruder Hemera. So I swapped Titan Aero to Hemera, as it's smaller and lighter.
2019-12-16 X-axis parts. Stepper motor holder, idler holder and bed carriage. I had a long twiddling with a stepper position and finally came with this version. Waiting for the 20 teeth pulleys and GT2 belt to arrive. After printing parts I found out that I've ordered wrong sized carriages. I needed MGN15C but ordered MGN15H. The difference is their length, 41mm vs 59mm. The rails are 150mm long. So 59mm carriage will move only 91mm. So ordered the C carriages, as I want to use whole 100x100mm bed.
|2||MGN15C 150mm rails+carriage||$22.40|
|1||MGN15H 200mm rail+carriage||$11.75|
|1||T8 Lead screw 8mm 2mm 150mm||$1.72|
|3||0.9deg Nema17 stepper motor 11Ncm 1.2A 42x42x20mm||$28.77|
|2||GT2 20 teeth idler pulley, bore 3mm||$1.40|
|2||GT2 20 teeth pulley, bore 5mm||$0.72|
|1||GATES-LL-2GT GT2 timing belt 1m 6mm||$5.31|
|1||1001002mm mini aluminium heatbed||$8.93|
|1||Thermistor 100K ohm NTC 3950 with cable with dupont||$0.91|
|1||BIGTREETECH TFT35 V3.0 Touch Screen WIFI||$28.98|
|1||BIGTREETECH SKR mini E3 V1.2 Control Board 32Bit With TMC2209||$28.14|
|1||E3D Hemera direct kit||$142.56|
|1||12V 30A 360W Switching Power Supply||$22.06|
|1||15A 250V Power switch 3pin AC power socket||$1.06|