MonoFab SRM-20
> VOLUME: 203.2 x 152.4 x 60.5 mm
> SPINDLE: 7,000 RPM
Design Inspiration & Kicad Exporting
For this week, the challenge was to move from a breadboard prototype to a professional permanent circuit. For that I used a Monofab, and a Copper with fiberglass botom plaque. Taking inspiration form my friend's Oscar Hernandez plaque I decided to make a module for Autobot design from Transformers, since he made one out of the decepticons logo.
1.- Exporting from KiCAD
> FIG 01: SVG_EXPORT_PROCESS.MP4
PROTOTYPE_V1
PRODUCTION_V2
STAGE 02: [ FILE CONVERSION ]
> TRACES_CALCULATION.MP4
> OUTLINE_CALCULATION.MP4
To prepare the file for the Monofab I used two SVG files, one for the inside milling and one for the outside milling, and for this I used a webpage called modsproject.
SOFTWARE SETUP: [ V-PANEL & DRIVERS ]
Download Drivers
Visit the Roland DG site to get the official drivers for your OS. It's the first step to establish communication with the MonoFab.
DOWNLOAD_DRIVERS.EXE
Driver Installation
Run the installer as administrator. This will allow your computer to recognize the machine via USB.
VPanel Setup
VPanel is the virtual controller. Without it, you cannot set the machine's origin points or start the milling process.
Get VPanel Software
Make sure to download the latest version of VPanel for the SRM-20 to ensure full compatibility with your firmware.
DOWNLOAD_VPANEL.ZIP
Get VPanel Software
Make sure to download the latest version of VPanel for the SRM-20 to ensure full compatibility with your firmware.
STAGE 03: [ PCB MILLING ]
Machine Setup
In order to mill your plaque you're gonna need your copper plaque and a wooden plaque to put underneath as a sacrifice.
Placing tape
For your plaque no to move it's necessary for you to place double sided tape underneath de copper plaque.
Fixating the sacrifice
To fix the plaque on the machine it's necessary to use 4 screws.
Screwing the plaque on to the Monofab
When you place your plaque on the machine it should look like this.
> DEBUGGING_MODE: BOARD_TESTS
Verifying circuit integrity and logic.
TEST_01: CONTINUITY
// Internal LED control with button on D9 for XIAO RP2350
const int buttonPin = D9; // Button pin
const int ledPin = LED_BUILTIN; // Built-in orange LED
bool ledState = LOW; // Current LED state
bool lastButtonState = HIGH; // Previous button state (HIGH due to Pull-up)
void setup() {
Serial.begin(115200);
pinMode(buttonPin, INPUT_PULLUP);
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, ledState);
Serial.println("--- Button System (D9) Ready ---");
}
void loop() {
bool currentButtonState = digitalRead(buttonPin);
if (currentButtonState == LOW && lastButtonState == HIGH) {
delay(50); // Debounce
ledState = !ledState;
digitalWrite(ledPin, ledState);
Serial.print("Button pressed. LED: ");
Serial.println(ledState ? "ON" : "OFF");
}
lastButtonState = currentButtonState;
}
TEST_02: SIGNAL_LOGIC
// Pin definition using 'D' nomenclature
const int buttonPin = D9; // Button on D9
const int externalLedPin = D10; // Your LED on D10
// Variables to manage state
bool ledOn = false;
bool lastButtonState = HIGH;
void setup() {
// Initialize Serial Monitor at 9600 bits per second
Serial.begin(9600);
// Configure D9 with internal Pull-up (button should connect to GND)
pinMode(buttonPin, INPUT_PULLUP);
// Configure D10 as output for the LED
pinMode(externalLedPin, OUTPUT);
// Ensure the LED starts turned off
digitalWrite(externalLedPin, LOW);
Serial.println("System Ready. Press the button on D9 to toggle the LED on D10.");
}
void loop() {
// Read the current state of pin D9
bool currentButtonState = digitalRead(buttonPin);
// Detect falling edge (when the button is pressed: HIGH to LOW)
if (lastButtonState == HIGH && currentButtonState == LOW) {
// 1. Add a small delay to skip the initial mechanical noise
delay(50);
// 2. Toggle the LED state
ledOn = !ledOn;
digitalWrite(externalLedPin, ledOn ? HIGH : LOW);
// 3. Print status to Serial Monitor
if (ledOn) {
Serial.println("LED Status: ON");
} else {
Serial.println("LED Status: OFF");
}
// 4. Wait until the button is released
// This prevents the LED from flashing crazy if you hold the button down
while (digitalRead(buttonPin) == LOW) {
delay(10);
}
}
// Save the state for the next iteration
lastButtonState = currentButtonState;
}
PRODUCTION FILES UNLOCKED
Download SVG, RML and CAD source files.