Machine design

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For the machine design, we were working in groups. As a group, we, i.e.,Abdullah Ibrahim ,Ionna Markapaolo and me on a spirograph drawing machine.

A Spirograph is a geometric drawing machine that produces roulette curves. A roulette is the curve described by a point (called the generator or pole) attached to a given curve as that curve rolls without slipping, along a second given curve that is fixed.

I was mostly involved in making drawings, the documenting and making of the website for our group and assembly of the machine.Later, for the electronics part, I was involved in making the stepper motor work, as the core mechanics of our machine is gears and all the gears are attached to one single main gear which is connected to the motor.

For more details about our project,you can visit GearAbility

Electronics

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Running the stepper motor

For the stepper motor, we are using, Nema 17

For this, we used

AN arduino Board

Stepper motor drive

arduino IDE

Protoboard

an oscilloscope for power

we used the code mentioned below for our motor to run at constant speed

Here is a pin out diagram of the Pololu stepper motor driver that we used. We found this helpfum while making our connections.

One we understood the pin out od the driver, We connected it to an Arduino Uno and the Nema 17 stepper motor

The stepper drive has a screw to fix the right resistance. Here, it was a little tricky, we tried multiple settings by rotating the potentiometer on the stepper driver in order to find the right resistance.

Once we had this, the motor was up and running and we integrated this in our machine.

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To download fabrication files click HERE

To view and download the code click HERE

To download files click HERE and

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Deepti Dutt / Fab Academy 2017 / Fab Lab Barcelona