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cpu
2025-11-28 16:59:55 +01:00
parent 511c990f3c
commit 18793a8a27
16 changed files with 1343 additions and 265 deletions
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16
Readme.md
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@@ -44,7 +44,7 @@ Using an MSLA (Masked Stereolithography) resin printer for creating PCBs is a te
Here is why the **Anycubic Photon Mono 4** specifically is well-suited for this task:
**1. Extremely High Resolution (10K Screen)**
The standout feature of this printer is the **10K (9024 x 5120)** resolution on a 7-inch screen.
The standout feature of this printer is the **10K (9024 x 5120)** resolution with a pixel size of 17µm (0.017mm) on a 7-inch screen.
* **Why it helps:** In PCB fabrication, resolution dictates how thin your traces can be. A 10K screen provides an exceptionally small pixel pitch. To put this in perspective, this is equivalent to a print resolution of approximately **1500 DPI**.
* *Calculation: The screen width is 153.4mm (6.04 inches). 9024 pixels / 6.04 inches ≈ 1494 DPI.*
* This allows you to expose traces for fine-pitch SMD components (like TQFP or 0402 packages) with professional-grade sharpness, far exceeding what is possible with inkjet or laser-printed transparencies.
@@ -69,8 +69,11 @@ The process involves exporting 2D layer images from your PCB design, converting
### Hardware
* A resin 3D printer (e.g., Anycubic Photon Mono 4)
* Photosensitive PCB. For consistent results, a pre-sensitized board like the **Bungard positive photoresist boards** is highly recommended due to its uniform coating. Available on [www.conrad.sk](https://www.conrad.sk/sk/p/bungard-150306e50-100x60mm-zakladny-material-jednostranna-35-m-foto-vrstva-pozitiv-d-x-s-100-mm-x-60-mm-1-ks-525472.html)
* UV light curing Solder Mask e.g. from Mechanic
<img src="images/Anycubic_Photon_Mono4.png" alt="Anycubic Photon Mono 4" width="400"/>
* Photosensitive PCB. For consistent results, a pre-sensitized board like the **Bungard positive photoresist boards** is highly recommended due to its uniform coating. A good example is [Bungard 16x100 double sided](https://www.conrad.sk/sk/p/bungard-120306z33-zakladny-material-dvojstranna-35-m-foto-vrstva-pozitiv-d-x-s-160-mm-x-100-mm-1-ks-529176.html).
<img src="images/Bungard_PCB.png" alt="Bungard PCB" width="400"/>
* UV light curing Solder Mask e.g. from Mechanic.
<img src="images/Mechanic_UV_Solder_Mask.png" alt="Mechanic UV Solder Mask" width="400"/>
### Installation
@@ -93,9 +96,10 @@ This guide was developed to work with Inkscape 1.2.2 and Blender 5.0.0
1. Open your PCB project in the KiCad PCB Editor.
2. Go to **File -> Plot** and select `Plot format` as `SVG` and set the `Output directory`.
3. In the `Include Layers` section select one layer (e.g. `F.Cu`, `F.Mask` or `F.Silkscreen`). If you select multiple layers they will be ploted as separate files.
4. Optionaly, select additional layer(s) e.g. `Edge.Cuts` in the `Plot on All Layers` section. This way you can merge layers (e.g. front copper layer with board outset) into a single svg file.
3. In the `Include Layers` section select layers `B.Cu`, `B.Mask` and `F.Silkscreen`. Each layer will be ploted as a separate SVG file.
4. Optionaly, select additional layer(s) e.g. `Edge.Cuts` in the `Plot on All Layers` section. This way you can merge layers i.e. add board outset into each file generated.
5. Click **Plot** and **Close**.
<img src="images/KiCad.png" alt="KiCad" width="500"/> <img src="images/KiCad_Plot.png" alt="KiCad Plot" width="500"/>
### 2. SVG to STL Conversion
@@ -212,7 +216,6 @@ THICKNESS_MM="0.1"
EXPORT_DPI=1494
```
**Usage:**
```bash
./svg2stl.sh my_design.svg
@@ -254,6 +257,7 @@ Since the minimum exposure time per layer is 0.1s and maximum 200s, calculate th
4. **Crucially, turn off Anti-aliasing**. Go to the "Advanced" tab and set **Anti-aliasing**. This ensures the sharpest possible pixels for crisp traces.
5. Slice the model and save the file to the USB drive.
<img src="images/Chitubox.png" alt="Chitubox" width="1000"/>
### 4. Exposing the Board

0
example/Anycubic_Photon_Mono_4_profile_00.cfgx → assets/Anycubic_Photon_Mono_4_profile_00.cfgx
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examples/Step_Down_Carrier_Board-B_Cu.stl Normal file
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examples/Step_Down_Carrier_Board-B_Cu.svg Normal file
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examples/Step_Down_Carrier_Board-B_Mask.svg Normal file
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@@ -0,0 +1,143 @@
<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg
xmlns:svg="http://www.w3.org/2000/svg"
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink"
version="1.1"
width="297.0022mm" height="210.0072mm" viewBox="0.0000 0.0000 297.0022 210.0072">
<title>SVG Image created as Step_Down_Carrier_Board-B_Mask.svg date 2025/11/28 15:32:38 </title>
<desc>Image generated by PCBNEW </desc>
<g style="fill:#000000; fill-opacity:1.0000;stroke:#000000; stroke-opacity:1.0000;
stroke-linecap:round; stroke-linejoin:round;"
transform="translate(0 0) scale(1 1)">
</g>
<g style="fill:#000000; fill-opacity:1.0000; stroke:none;">
<circle cx="127.9000" cy="66.1000" r="1.6000" />
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example/Step_Down_Carrier_Board.stl_0.05_0.1.pm4n → examples/Step_Down_Carrier_Board-F_Silkscreen.stl_0.05_200_2025_11_28_16_45_00.pm4n
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example/Step_Down_Carrier_Board.svg → examples/Step_Down_Carrier_Board-F_Silkscreen.svg
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@@ -7,7 +7,7 @@
xmlns:xlink="http://www.w3.org/1999/xlink"
version="1.1"
width="297.0022mm" height="210.0072mm" viewBox="0.0000 0.0000 297.0022 210.0072">
<title>SVG Image created as Step_Down_Carrier_Board-F_Silkscreen.svg date 2025/11/27 14:53:26 </title>
<title>SVG Image created as Step_Down_Carrier_Board-F_Silkscreen.svg date 2025/11/28 15:32:38 </title>
<desc>Image generated by PCBNEW </desc>
<g style="fill:#000000; fill-opacity:1.0000;stroke:#000000; stroke-opacity:1.0000;
stroke-linecap:round; stroke-linejoin:round;"
@@ -1681,226 +1681,6 @@ L87.9400 71.0400
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Z" />
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stroke-linecap:round; stroke-linejoin:round;">
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svg2stl.sh
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@@ -14,48 +14,53 @@ THICKNESS_MM="0.1"
# DPI based on the 3D printer resolution (e.g. 1494 for Anycubic Photon Mono 4)
EXPORT_DPI=1494
# ---------------------
# 1. Check Input
if [ -z "$1" ]; then
echo "Error: No input file provided."
echo "Usage: ./svg2stl.sh <input.svg>"
# Check for at least one input file
if [ "$#" -lt 1 ]; then
echo "Error: No input files provided."
echo "Usage: ./svg2stl.sh <file1.svg> [file2.svg ...]"
exit 1
fi
# 2. Setup Absolute Paths
INPUT_FILE="$(readlink -f "$1")"
WORK_DIR="$(dirname "$INPUT_FILE")"
BASENAME="$(basename "$INPUT_FILE" .svg)"
TEMP_SVG="$WORK_DIR/${BASENAME}_temp_processed.svg"
OUTPUT_STL="$WORK_DIR/$BASENAME.stl"
# Loop over all input files
for INPUT in "$@"; do
INPUT_FILE="$(readlink -f "$INPUT")"
# 3. Inkscape Processing
# Note: We do NOT resize here. We export high-res geometry and resize in Blender.
ACTIONS="select-by-element:text;delete;select-all;object-stroke-to-path;path-union;export-plain-svg;export-filename:$TEMP_SVG;export-do"
INK_ARGS="--export-dpi=$EXPORT_DPI --actions=$ACTIONS"
echo "Processing: $INPUT_FILE"
echo "------------------------------------------------"
echo "Step 1: Inkscape Processing"
echo "Input: $INPUT_FILE"
echo "------------------------------------------------"
# Setup Absolute Paths
WORK_DIR="$(dirname "$INPUT_FILE")"
BASENAME="$(basename "$INPUT_FILE" .svg)"
TEMP_SVG="$WORK_DIR/${BASENAME}_temp_processed.svg"
OUTPUT_STL="$WORK_DIR/$BASENAME.stl"
inkscape "$INPUT_FILE" $INK_ARGS
# Inkscape Processing
# Note: We do NOT resize here. We export high-res geometry and resize in Blender.
ACTIONS="select-by-element:text;delete;select-all;object-stroke-to-path;path-union;export-plain-svg;export-filename:$TEMP_SVG;export-do"
INK_ARGS="--export-dpi=$EXPORT_DPI --actions=$ACTIONS"
if [ ! -f "$TEMP_SVG" ]; then
echo "------------------------------------------------"
echo "Step 1: Inkscape Processing"
echo "Input: $INPUT_FILE"
echo "------------------------------------------------"
inkscape "$INPUT_FILE" $INK_ARGS
if [ ! -f "$TEMP_SVG" ]; then
echo "ERROR: Inkscape failed to create the temp file."
exit 1
fi
fi
echo "------------------------------------------------"
echo "Step 2: Blender Processing"
echo "Target Width: ${TARGET_WIDTH_MM} mm"
echo "Target Thickness: ${THICKNESS_MM} mm"
echo "------------------------------------------------"
echo "------------------------------------------------"
echo "Step 2: Blender Processing"
echo "Target Width: ${TARGET_WIDTH_MM} mm"
echo "Target Thickness: ${THICKNESS_MM} mm"
echo "------------------------------------------------"
# Pass Width and Thickness to Python
blender --background --python pcb_to_stl.py -- "$TEMP_SVG" "$OUTPUT_STL" "$THICKNESS_MM" "$TARGET_WIDTH_MM"
# Pass Width and Thickness to Python
blender --background --python pcb_to_stl.py -- "$TEMP_SVG" "$OUTPUT_STL" "$THICKNESS_MM" "$TARGET_WIDTH_MM"
# 4. Cleanup
rm "$TEMP_SVG"
echo "Done! Saved to $OUTPUT_STL"
# Cleanup
rm "$TEMP_SVG"
echo "Done! Saved to $OUTPUT_STL"
# ---------------------
done