8. Open source hardware: from fibers to fabric#

PLUG - IN System : for an autonomous and open Tricotin#

Test Nema 17 + Tricotin#

Crazy test …#

Tricotin#

Tricotin + Plug in (Boxn°1)#

1 Nema 17 motor#

To Find the good place for the motor, I need to find the good duo between the 4 wires. For this I take the multimeters and put it on ohm.

Test the curent 1 grey/yellow + red/green
Test the curent 2 grey/green + jellow/red
To find the twin

The good duo are the images where I find a positive value.

2 Current and power supply#

3 TEST GrblShield v5b Synthetos with an Arduino uno#

gShield Synthetos 3 motors add the motor test with the power supply

The first test was not conclusive because the code for Gshield was not good and not very clear, I don’t understand witch value we need to change and how it works. The motor move but it don’t make a whole tour.

4 TinyG Synthetos#

We change the driver with TinyG.

TinyG 4 motors Plug tow motors

5 To put live in Nema 17 motors we find the Freeware CoolTerm but it work with the drivers FTPI.#

Instal FTPI drivers Steps

6 The drivers work with CoolTerm when you install CoolTerm it creat an input like an usb key and I need to change the informations.#

Informations to change for CoolTerm in the Settings code

7 Step to download the code for the motors.#

8 Tricotin#

I would like to hack the Tricotin to make it autonomous. For this I open it.

The product Opened with all pieces

The piece what I make is to change the #HANDLE. The manivelle is the start of the macanism with two #gears inside the Tricotin.

Piece Piece

9 The adaptator for the Tricotin#

3D modeling#

To make the piece I take all dimensions Handle
The Motor NEMA 17 Step 1 the motor part Piece 1 Pieces 2 make a notch for the elasticity
Design for the 3D printing

After the first Print I take the piece but the size was too big and the piece doesn’t work because the contration of the material. So I make different pieces with different size.

Tolerence off the material, less 1 mm

Different size

2 Cura#

The software List of machines
First test And parameters
Second test With different sizes

3 Ultimaker#

Ultimaker 3 Head detail Treath
First test Second test
Finish Piece

Test the adaptator on the motor#

The adaptator means make the link between the #Tricotin and the #Nema 17.

Good link On the Tricotin Between the Nema 17 and the Tricotin

Option A Sparfun Serial Motor Driver#

Object Link
Data Sheet hookup guide
Arduino example code test Guitub test serial motortest.ino sparkfun
Arduino example two motor Guitub test twomotorsrobot.ino
Setup arduino image
Set up Serial controlled motor sparkfun + arduino

Option B Sparfun Easy Stepper Motor Driver#

Object Link
Datasheet Sparkfun
Tutorial Bildr
Schema arduino + board
EasyDriver Stepper Motor sparkfun + arduino 
//////////////////////////////////////////////////////////////////
//©2011 bildr
//Released under the MIT License – Please reuse change and share
//Using the easy stepper with your arduino
//use rotate and/or rotateDeg to controll stepper motor
//speed is any number from .01 -> 1 with 1 being fastest –
//Slower Speed == Stronger movement
/////////////////////////////////////////////////////////////////

#define DIR_PIN 2
#define STEP_PIN 3

void setup() {
pinMode(DIR_PIN, OUTPUT);
pinMode(STEP_PIN, OUTPUT);
}

void loop(){

//rotate a specific number of degrees
rotateDeg(360, 1);
delay(1000);

rotateDeg(-360, .1); //reverse
delay(1000);

//rotate a specific number of microsteps (8 microsteps per step)
//a 200 step stepper would take 1600 micro steps for one full revolution
rotate(1600, .5);
delay(1000);

rotate(-1600, .25); //reverse
delay(1000);
}

void rotate(int steps, float speed){
//rotate a specific number of microsteps (8 microsteps per step) – (negitive for reverse movement)
//speed is any number from .01 -> 1 with 1 being fastest – Slower is stronger
int dir = (steps > 0)? HIGH:LOW;
steps = abs(steps);

digitalWrite(DIR_PIN,dir);

float usDelay = (1/speed) * 70;

for(int i=0; i < steps; i++){ digitalWrite(STEP_PIN, HIGH); delayMicroseconds(usDelay); digitalWrite(STEP_PIN, LOW); delayMicroseconds(usDelay); } } void rotateDeg(float deg, float speed){ //rotate a specific number of degrees (negitive for reverse movement) //speed is any number from .01 -> 1 with 1 being fastest – Slower is stronger
int dir = (deg > 0)? HIGH:LOW;
digitalWrite(DIR_PIN,dir);

int steps = abs(deg)*(1/0.225);
float usDelay = (1/speed) * 70;

for(int i=0; i < steps; i++){ digitalWrite(STEP_PIN, HIGH); delayMicroseconds(usDelay); digitalWrite(STEP_PIN, LOW); delayMicroseconds(usDelay); } }```

Packaging#

The motor need to be at 43mm the boxe
Carrefour du numerique Box Design
Opened with Rhino Opened with Autocad
Laser Cut Assembly

Next Step Opened Tricotin#

For this product I would like to Re-modelize the 3D model for the 3D printing and put it online for sharing with other.

3D Modeling 3D Printing
The base of the Tricotin 3D modeling 3D printing

This is a part of my after final project, that I would like to develop after fabricademy. Tools with open sources files to downolad

Collaborative Machine#

At the Fab I meet Remy Ducros, a Fabulous fabacademy student. We will colaborate together to make our own fab tricotin machine in a case. A Fabtricotin mobile machine. Which can make treadh automatically with motors. The machine could be with a parametric design and with differents size of tricotin. At the begining we have started with our : 4 needles but our goal is with 40 needles.

My fabricademy is still finish, but I stay 2 weeks more to finish this project !

Detail from the tricotin Fusion making add in DC motor adaptator V.2
Adaptator V.2 for a DC motor

This photo bellow are a part from the Remy’s documentation.

Tricotin machine Fab Tricotin machine Fab

I can’t wait !!!