1. Creality Ender pro 3D printer
I bought it as a kit. It took me around 11 hours to assemble it.
Pro:
a. This is one piece machine. You could hold it with one hand and move it around.
b. You don't need a computer to use it.
c. You could download any STL file from the web and you could print immediately.
d. Their service is very nice. The person I was writing to was highly trained.
Con:
The printed products are very soft, you could easily smash them with just two fingers.
My designed and printed piece:
for a DC to DC converter:
specification:
inside:
2. Prusa 3D printer mini
I bought it as an assembled one, it still took me more than 2 hours to assemble.
Pro:
a. Prusa's 3D printer is highly rated in "Make" magazine.
b. Printed products are pretty and solid, I guess, you might have to use a hammer to destroy any one of them.
Con:
a. The machine consists 3 parts. You could not hold the machine with one hand and move it around.
b. The filament was broken so often during printing that I started to hate the printer. Very poor design in gears for feeding the filament.
c. Very poor service. I emailed them more than 10 times, they could not solve my problems. And then the person I was talking with disappeared suddenly for good.
d. You could not download a STL file from the web and print immediately in this machine. You have to do something (I don't know what).
3. CNC machine：
I could not find the brand name of this machine (bought new on ebay before covid 19 and there is no ordering history for that year any more).
Pro:
Very easy to use, without any learning curve.
Con:
a. You have to use a computer connedted with a USB cable to work with it.
b. The materials you are working with could not be fixed on the machine steadily.
c. The chuck from the motor of Z-axis could not hold the bit (for carving the copper on PCB ) steadily due to the thin axle of the motor).
