I have do some explore about multi-material 3D printer(I call it DM)which can print plastic(PLA or TPU),and metal(Sn) in one model.
In the meantime I do some basic practice about computer control engraving machine in MECHANICAL DESIGN and BUILDING week
I found the core point in this project is how to control the metal extrude. In Professor Neil 's advice. My finial project's topic change to 3D printing nozzle for Sn.
My own board( contain ATmega328p) to control the machine;
NTC Temperature Sensor get the temperature of hot end;
Relay control the running of hot end;
A4988 Driver to control a stepper motor and then control the running of Solder wire;
Improve the hot end;
Design new coolant system to control the temperature of machine
So I design the structure as the following video
In the following time, I would practice it and test it.
I have do some basic research about similar machine,and list as following:
This is a desktop machine,its nozzle can print conductive silver ink on base board, and then maker can use another method to SMT
prototype1 and prototype 2
Prototype3:How to Conductive the pipe(Cross-sectional dimensions2*2mm )
DM machine:What's the conductor material for DM machine
DM machine operation:The method of solidify,to make sure the material can stand the heat
DM machine coding:Process the data from gerber and stl