Week08

Assignment: Electronics Production

Software used: KiCAD

Individual Assignment:

Creating a PCB with Seeed Studio XIAO ESP32-C3 and SMD LEDs. To create a blink program and control the blinking in the PCB.

Machine Used:

For milling the PCB we are using Wegstr CNC machine.

Machine Specification

Milling Workspace	140x200x40 mm
One Step of the stepper motor	0.004 mm
Machine Dimension	380x460x290 mm
Spindle	Brushless Motor
Diameter of the spindle	3.175 mm
PCB Level	Auto Level
Connectivity	USB
Repeatability	0.02 mm
Machine weight	7 kg
Max. Speed	170x170x170
Max. Height of workpiece	40mm
Spindle Speed	11,000 rpm

imagesep from Wegstr

Electronics Designing Process

Schematic design of the PCB circuit, with XIAO, 4 LEDs & Capacitors, and a Push button

PCB Layout with tracks. Here I have added iTN-Salem, and a small key chain hole

3D view of the PCB, which resembles the expected output

Downloaded the SVG imagesep of the Track and Edge cut.

G-Code Generated using Mods:

Image from gitlab.fabcloud.org repository

Mods CE is a modular cross-platform tool for Fablabs. It is based on independent but interrelated modules. Mods could potentially be used for CAD, CAM, machine control, automation, react to physical models, and much more. I am very much interested in contributing more to community development.

Opening page - www.modsprojecy.org . Right click for options and select programs. Under G-Code select - mill 3d PCB

Select option “Select SVG” and pick the SVG image generated using KiCAD.

V-Bit Calculator Select the tip diameter and offset number to 4 and click send calculation. In Mill raster 2D check is the offset value is 4, and click calculate.

This is the toolpath generated and the numerical codes will be downloaded in the respective folder

You can repeat the same process for the edge cut file.

PCB Milling Process :

Wegstr CNC is a simple UI/UX design. First, we have to set the origin and the reset the zero. Load the G-Code and the next step is to measure the auto leveling of the bed were the PCB is placed.