Use high DPI images if the gaps are set to be exactly 1/64'.Set the tool width to be 0.3mm even though it is 0.4mm.Some advice I got from Mike, Jean-Francois and Neil. Narrow gaps is causing the calculation tool to skip over those gaps. Some of the traces are shorted to the ground plane. The outline cutting is set to 0.6mm which cut into the sacrificial layer below. I had cut both the Andy board and the class board for backup which you can see the outline cuts. The triptych shows path calculation (for the class standard board), pcb tracing and the final outline cutting. Then loosened screw, lowered the end mill by hand until it touched the board, held it down and tightened the screw again.Then with some trial and error I got it over the starting spot.I lowered the head about halfway down using the up-down buttons until the end was an inch above.I moved the head to 20,20 with the tool.View mode just moves the part forward and the head up. I took it out of view mode (press view).Unlike the laser cutters, it turns out that whereever you place the cutting head manually is considered to be (0,0,0). I had my board taped down and there was a 1/64' end mill in place.

To compute the tool path, I took the traces file, and open it up using Neil's mod tools, set output to 'roland mdx-20' and process to 'pcb traces 1/64'. This way, if the tool head cuts too deep it doesn't hit the bed of the mill. To mill the board, one first puts down a 'sacrificial board' on the bed of of the machine and then the actual board on top of that taped down with double sided sticky tape. Instead of doing messy etching of traces, we are going to mill the traces out from copper clad FR1 boards using a Roland MDX-20 desktop mill. The appeal of Andy's design was the built-in usb connector as opposed to using a mini-usb jack and a cable on the standard design. I went for Andy's design which turned out to be bit of a mistake. The task is to understand how to mill out traces on copper clad boards, and solder surface mount components. We are making AVR programmers based off existing circuit designs. Week 2: The One Where We Make Electronics

Avr gcc for mac