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Sunday, 28 December 2014

Prototype Board: DC motor/Encoder - Teensy 3.1 based 3D printer controller

This will be a short post today.  

I had mentioned putting up pictures as I go along, so I took this to show the first prototype of the controller board.

Here is the layout of my Teensy 3.1 based 3D printer controller.


As of this shot, I have not yet wired it.  Nor have I installed the analog components (power supply, heater drivers, pullup resistors, filter capacitors, etc...).  It is also missing the connector for the extruder stepper motor. 

As I described in my previous post, my motor control design is based on Adafruit's Motor Shield V2.3.  For my prototype... well... I'm using their shield, pilfered from one of my older robots. This fantastic design employs an NXP PCA9865 16 channel 12 bit PWM controller, intended to drive LEDs, but instead to  driving a pair of dual Mosfet H bridge TB6612FNG motor drivers.

The Library for this Shield works with the Teensy 3.1 just fine. (It is just I2C after all).

Ok... I'm off to wire this up... wish me luck.