Fab Academy 2016

4-1. Design my FAB-ISP

I choosed a Neil’s FAB ISP and changed the outline like the picture. This shape is our fablab’s logo mark.

I redesigned the PCB with adobe illustrator.

and , I inserted the text “FAB ISP” , the date”20160220” and our fablab name “FABLAB DAZAIFU”.

I exported to three png files with 1000ppi.
(1000ppi is the best. 300ppi was not good…)

trace.png

outline.png

text.png

4-2. Fabmodules

1. input file >> select "image file (.png)"

2.output format >> select “G-code.nc”

3.process >> select “PCB traces 1/64”(trace,text) or “PCB outline 1/32”(outline)

the process setting is very important.
The endmill I used is “ 土佐昌典VC”

>> trace

select "PCB traces 1/64"

tool diameter : 0.2mm

number of offset : 4 (default)

>> text

select "PCB traces 1/64"

tool diameter : 0.2mm

number of offset : -1

>> outline

select "PCB outline 1/32"

tool diameter : 0.79mm (default)

number of offset : 1 (default)

4-3. making my FAB-ISP with CNC milling machine

I used the milling machine “kit mill CIP100” in our fablab.
This machine is made for making PCB.

First, I set a paper phenol board on the machine , moved the endmill to the starting position.

I opened “USBCNC” is the software of the machine.

First, I milled the traces.

1. open the file "trace.nc"

2. set the origin point

3. click the reset button

4. click the start button Next, the text

1. open the file "text.nc"

~~2. set the origin point, click a reset button~~

* Do not change the origin point.

2. click the start button

Finally, the outline

1. open the file "outline.nc"

~~2. set the origin point, click a reset button~~

2. click the start button
Finished.

4-4. Soldering

I soldered some electronics components on the circuit board.

ATtiny44A

20MHz resonator

1μF capacitor

3.3V diode

USB connector

2×3pin

resister : 100Ω*2, 1kΩ*1, 10kΩ*1, 499Ω*1, 0Ω*2

This Soldering is very difficult because electronics parts is very small. I think it's important to prepare tools : a soldering vice and a tweezers.

4. Electronics production

4-1. Design my FAB-ISP

4-2. Fabmodules

4-3. making my FAB-ISP with CNC milling machine

4-4. Soldering

4-5. Writing firmware to FAB ISP