The cheapest OpenScan Zero 3D scanner project (Mini/Midi)
The title is true if you have a mini milling machine and a Raspberry Zero 2W ;-) Raspberry zero differs in minimal configuration, so I got rid of the optional connector in my scanner. The advantages of the project are a lower price and no problems with the camera.
Equipment:
3D-Printer, for example Anet A8 or Prusa I3 (any FDM with 200x200mm print area) Mini milling machine (i use CNC 1610) Soldering iron and solder Tester
Materials:
coPET/PET-g filamet (depends to project type up to 500 grams) one-sided foiled fiberglass for PCB - two plates 90x70mm or one with similar area. Raspbery Zero 2W with 16+ Gb microSD card IMX519 or Raspberre camera V3 with cable for RasPi Zero. two a4988 drivers two 100uF 16v & two 100nF capacitors two IRLZ34/IRLZ44 mosfet (you need to cut-off heatsink on it) two curved pin Header male, 4p, 2.54 LM7805 or better step-down 5V 1A replacement Pin Header female, 2x20p, 2.54 Barrel Connector, 5.5-2.1mm
two NEMA-17 stepper motor with 50-sm. wires
Eight 1W-led two resistors 1 ohm three 26AWG 20sm.-lenght wire
Varnish for PCB (I have clear)
12V 2A Power Supply
Resources:
You need to download & print scanner parts from https://github.com/OpenScan-org/OpenScan-Design !!!!!One more thing is needed - a Zero shield holder - just from here - file Mount.stl
Download OpenScan Composer software and firmware from https://www.openscancomposer.com/ Flashing and install manual you can find on that site too.
Development:
Download pcb models 4 OpenScan Zero shield & RingLight just from here - files OpenScanZero.GBR & RingLight.GBR Mill it ( present modells in Gerber mirrored format) - i use FlatCam for processing and Candle for milling
-
Drill the mounting holes in the RingLight board with a 4mm drill and the central hole for the camera 16mm
-
Solder LEDs and resistors on it. Observe the polarity - there are two groups of LEDs in series.
-
Check the functionality of the LEDs by connecting red to +12V and green, blue to minus. Cover the board with varnish.
-
Solder the power connector and jumpers to the shield board
-
Solder capacitors, connectors and transistors. They should not touch the jumpers
-
Solder the stepper motor drivers & Pin Header female.
-
Connect the power supply. Did the smoke not go away? Perfectly! Adjust the current of the a4988 drivers.
-
Solder the connectors on the Raspberry pi with the pins facing down. Insert the microSD firmware into the Raspberry and its into the shield.
-
Still no smoke and the LEDs flashed a few times? Great! Print plastic parts!
-
The compilation process is described at https://openscan-org.github.io/OpenScan-Doc/
The camera is fixed with double-sided tape. OpenScan shield is attached with glue.
Yes, the system is far from ideal, but it worked for me the first time