Reciprocal Roof Roundhouse Project

What is a Reciprocal Roof Roundhouse?
A reciprocal frame is a class of self-supporting structure made of three or more beams and which requires no centre support to create roofs, bridges or similar structures.
A reciprocal roof is a self-supporting spiral of timbers where each timber rests on the last and needs no central support. It is assembled by first installing…

Open Source DC Servo Controller

I am looking into replacing the stepper motors on my motion control head with PID controlled DC motors. This should allow me to make improvements in terms of noise produced by the steppers, and speed. I have previously done some experimenting with PID loops with the Arduino mega and found that although I could get…