Electronics Production

During week #50 (kidding...haahhaa) .....First and foremost, the task of the week was to learn how to operate a machining milling machine to machine a PCB board and solder components onto it. With the Marmota team we learn how we had to indicate to the machine what to do.It's not simple at all as I tought haha

Flat Cam + Gerber

Flat Cam is a free and open-source computer-aided manufacturing (CAM) , it is designed to create PCB prototypes by converting the Gerber files generated from various CAD software into G-code that can be read by a CNC machine. Below there is a video of the steps that I've use.

I chose the board I had designed in electronic design. I thought it was going to be simple but it has its parts to take into account. To begin with, the PCB material by definition is a flat sheet of insulating material and a layer of copper foil, laminated to the substrate. Extra information: PCB usually consists of four layers, which are thermally laminated together into a single layer.

For more about the machines, enter in the group assigment of The Team Marmota page

Roland MODELA PRO II MDX-540

So... to cut we used the Roland MODELA PRO II MDX-540 that is a 3D milling machine that can create prototypes and parts from various materials, such as wood, plastic, metal and resin.

The software name that uses is Roland's Subtractive Rapid Prototyping (SRP) , which combines high-speed milling with user-friendly software. The MDX-540 has a control panel that simplifies the setup and production processes by grouping the most commonly used settings.

Something important to keep in mind is:

• 1- Notice on which layer lines were drawn. It happened to me that I could not export the cut layer (profile) because I drew it on another layer
• 2- See the diameter of the tracks according to the cutters you have. That's important because when you cut these you can lift up.
• 3- Attached the PCB at the Machine Bed. Weattached with a double sided tape
• 4- Another important thing is to determine the speed with which the Spindle will move, in my case, I used a speed of 10,000. Remenber.. you have to erase the 'M6 code' (Note pad -----Search for the M6 and erase it)

Last but not least, before solder clean the surface

Individual practices

To milling I chose the board I had designed in electronic design. I thought it was going to be simple but it has its parts to take into account. To begin with, the PCB material I charge the gerber into Flat Cam to, the components (as I said before) I did not know the names, also all those object library things it was new to me.

Individual practices - Conclusions:

You don't have to be scares of failure, some of us learn slowly, some components burned out because I did not read the datasheet, I mean, sometimes you need to position the component and you have just have few second to position the soldier on top. Also, I had to use "Flux" to make anything a bit easy.

Code

// Sketch to turn on & off blinking LED when push button is pressed

//Constants int buttonPin = 3; const int PIN = 4;
//Variables int buttonState = 0; int flag=0; void setup() { //Input or output? pinMode(PIN, OUTPUT); pinMode(buttonPin, INPUT_PULLUP); digitalWrite(PIN, LOW); }

void loop(){
//Read button state buttonState = digitalRead(buttonPin);
//If button pressed... if (buttonState == HIGH) { //SI SE PRESIONA PASA VCC //turn led on & an if ( flag == 0){ digitalWrite(PIN, HIGH); flag=1; //change flag variable }
//button pressed again, turn led off else if ( flag == 1){ digitalWrite(PIN, LOW); flag=0; //change flag variable again } }
}

Download

ECO BUTTON FILE