Category Archives: Workshop 88 Stuff

IR comms considerations (for penlift for the Drawbot)

Introduction I was planning to hold this to be part of a much larger writeup of the Drawbot, but while it started as part of that project, it sort of took on a life of its own as an IR … Continue reading

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Laser etched rubber stamp

Ever since Mitch Altman presented the idea, I’ve thought hackerspace passports were pretty cool, if geeky.  (Thanks to Adafruit for the pic.)  I’ve also felt that Workshop 88 should be able to participate with a good stamp.  Of course we … Continue reading

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W88 Laser Exhaust Fan Replacement

When we first got the W88 laser cutter up and running, we scavenged the ancient circulation blower from the old, gutted in-wall furnace, took advantage of the 8″ flue/fresh air hole in the wall, and hacked a mounting to provide … Continue reading

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Observations on laser cutter kerfs

I wanted to have the laser cut center holes in 3mm acrylic gears that would provide just enough clearance to use 4-40 screws as pivots while allowing the gears to spin freely.  I didn’t know exactly how much clearance that … Continue reading

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Shapeoko 2 calibration runs

Background After some issues with accuracy drilling holes in PCBs and concern about backlash with the GT2 belt drive that makes some real machinists roll their eyes, it was time to do some initial calibration investigation. Bill P brought in … Continue reading

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Shapeoko 2 PCB drilling – and scale error

Thanks to some urging from Steve S, we finally got geared up to try PCB drilling on the Shapeoko 2 at the space last Thursday (8/13/15).  (We had planned to use it to drill badge boards last September, but during … Continue reading

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‘Fixed’ 5.5V USB supply

There was a nice little wall wart USB charger in the electronics lab at the space for general phone charging, running Arduinos, etc.  But when I tried to charge my new phone (Moto G) with it, it wouldn’t  charge.  Huh? … Continue reading

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CNC machine emulator for grbl

I don’t have a CNC machine at home, but several times I’ve wanted to do some kind of testing that sort of needed a machine to see what was happening.  Not particularly to print or cut – just to watch … Continue reading

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Shapeoko 2 cutting tests

Now that the W88 Shapeoko 2 (graciously donated by Inventables) is mostly working, we tried some test cuts in various materials.  All were done with my old Dremel and a 1/8″ upcut end mill (WRONG: downcut; see update at end).  … Continue reading

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But I marked it so that wouldn’t happen!

Yeah, I use unpolarized connectors.  Good old 0.1″ headers are cheap, small, plentiful, and I’m pretty comfortable using them.  For the power/I2C bus in the dollhouse, they were an obvious choice.  But because they’re unpolarized (OK, unless you make them … Continue reading

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