This is my build of the FreeLSS/Atlas 3D scanner. Instead of using a Nema 17 motor, I used a 28BYJ-48, since they are cheap, easily obtainable and I have a few laying around. One thing to keep in mind if a person chooses to use the 28BY remember the A4988 has a minimum motor voltage of 8 volts. The 28BYJ-48 comes in 2 versions, 12 volts and 5 volts; if you use the 5 volt version a resistor will have to be put in series with the motor coils. A 70 to 100 ohm will be adequate to limit the motor coil current as the result of the higher drive voltage. If the resistor is not used the motor will overheat and possibly fail.
_
M | A1------------/\/\/\/\/\/------------------------
O | A2---------------------------------------------
T |
O | B1------------/\/\/\/\/\/------------------------
R | B2----------------------------------------------

The blue parts are PLA and he Black parts are ABS. I used this project to try my hand at ABS printing. A couple of failures here and there, but the ABS parts turned out well; on a side note, all of the screws are overkill, I only used enough screws to hold the pieces in place and glued the entire structure will thin CA glue. The glue is holding both PLA and ABS quite well.

As soon as I have the electronics finished, I will update this thing.

And the only cost I have in this make is the cost of the plastics, all other parts I had laying around.

Duplicator I3

No

No

For the PLA, typical settings
For the ABS;

Print speed - 45 mm/s
2 top layers
2 bottom layers
1 perimeter layer
30% infill
BED @ 90 C
Extruder @ 260 C

One coat of Suave Extreme Hold hairspray, let dry, then a second coat and let dry on glass. The Suave was bought to experiment with, it works better with ABS than Aquanet does.