Modela Mill

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Using the provided .png I used the fab modules to cut three boards with the Modela Mill. I used the default settings and managed to get to usable boards. The hardest part was dealing with the x and y offset on the fab module. I had to quit the fab module and reopen in between milling the traces and cutting out the last board, but I remembered the offset: (52, 5). Having never soldered before, I was prepared for the worst heading into the stuffing tutorial but managed to solder everything without too much problem. Mostly because David Costanza > average soldering instructor. He also helped me program it and it all worked the first time I tried it.

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Most people around me had to try more than once.

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Evidence. So I felt slightly jipped out of a more rich troubleshooting experience. And then remembered my friend the Vinyl Cutter.

Vinyl Cutter

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It took me a while to figure out the settings to cut out the traces from the copper. I used the provided .png file for the FAB ISP and started testing.

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My first try was with 2 cm/s speed and a force setting of 80.

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There was some gouging up near the location of the zero ohm Resister solder jump. But I decided to try and use it to test the process of removing the copper from the sheet.

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The first try was quite fruitless.

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I thought at first the knife had not cut through at all, but found that it had. First casualty.

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My first reaction was that the traces needed to be cut loose more effectively, so I bumped the power up to try and establish and appropriate upper bound for experimentation.

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A Power setting of 90 was slightly extreme.

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However, it did allow me to have some practice at removing the copper using painters tape. it was a little sloppy in part from the gouging that happened, but it was useful to go through the transfer process.

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Not a clean pass. Second Casualty.

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So I did a bunch of tests for power settings trying to get a board with minimal gouging. I swung back and forth between 75 and 90 and finally zeroed in on 83 as a good one. Although we did have some gouges there too. In the end, I also remembered to check the blade, which was protruding a lil to far, so after adjusting that and the power settings, the traces cut out with the power setting of 80 and 83 were useable.

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I also discovered an effective way to help the initial transfer process along. I used the knife to pry loose the beginning.

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First transfer sans casualty.

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At a loss for a substrate to transfer the copper to, I eventually just stuck it to a piece of vinyl left over from last week's assignment.

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Practice weeding on the first casualty.

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Finally weeded the traces cut out on the power 80 setting without tearing anything necessary off the vinyl. I would NOT reccommend using the vinyl. The copper did not really stick to it nicely.

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Power 80 wins.

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So, then I thought: Well, I'm probably going to screw this up by trying to solder it, but let's have a go. and it turned out to be not that hard even though there was significatnly less space between traces. I had to use the copper braid to remove solder once on the USB connector and even used the knife to cut apart some traces that I soldered together, but after I tried that I thought: Well, I doubt its programmable. But it was, and I managed to program it first try again.

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Shoot, Son!

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