Category Archives: Drawbot

Drawbot stepper torque measurement

Posted on November 24, 2017 by Jim

To measure holding torque on the old Science Center steppers, I attached an aluminum arm to one of the drums, keeping it as close to where the bobbin was epoxied to the shaft’s gear as I could.  I notched the … Continue reading →

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Drawbot string plotter

Posted on November 2, 2017 by Jim

The Drawbot, a ‘polargraph’ 2-string plotter inspired as a junkbox project by Bill Paulson at Workshop 88 in April of 2013, has been under on and off development and improvement ever since. While there are still a couple of upgrades … Continue reading →

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IR comms considerations (for penlift for the Drawbot)

Posted on March 23, 2017 by Jim

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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