Turn Your Bambu Lab A1 Mini Into a Pen Plotter in 30 Minutes (No Mods)
by Rose Samaras in Design > Software
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Turn Your Bambu Lab A1 Mini Into a Pen Plotter in 30 Minutes (No Mods)
Learn how to convert your Bambu Lab A1 Mini 3D printer into a fully functional pen plotter in less than 30 minutes, without any firmware modifications, soldering, or permanent alterations to your printer.
What You'll Create
- Line art drawings with professional precision
- Custom maps and diagrams directly on paper
- Greeting cards and invitations with unique designs
- Technical illustrations and architectural sketches
- Calligraphy and custom lettering projects
Why This Method Works
Unlike other pen plotter conversions that require:
- ❌ Firmware modifications
- ❌ Soldering components
- ❌ Permanent hardware changes
- ❌ Complex calibration procedures
This method uses:
- ✅ A simple 3D-printed pen mount
- ✅ Standard ballpoint pens
- ✅ Web based G-code generation
- ✅ Reversible installation
- ✅ Zero technical expertise required
Supplies
Hardware Components
1. Bambu Lab A1 Mini - Your existing 3D printer
2. Standard Ballpoint Pen - 0.5mm to 0.7mm tip diameter (recommended brands: Stabilo Fineliner Point 88, Pilot G2, Uni-ball Signo)
3. Pen Mount - 3D-printed attachment (STL file provided)
4. Paper - A4 (210 × 297mm) or Letter size (8.5 × 11 inches)
5. Painter's Tape - Blue or green masking tape for securing paper
6. Precision Tools - Scissors or craft knife for tape cutting
Software Requirements
- 3dplotter.xyz Web App - Online G-code generator optimized for pen plotting with Bambu Lab, Elegoo, Creality and other 3d Printers
- SD Card Reader - For transferring files to your Bambu Lab printer
- Web Browser - Chrome, Firefox, Safari, or Edge (latest versions)
Estimated Costs
- Pen Mount: 170g - 6oz of Filament around 2$ (3D print yourself)
- Ballpoint Pens: $2-5 per pack
- Painter's Tape: $1-2 per roll
- 3dplotter license: $29.9 lifetime (limited time offer)
Total Project Cost: $30-40
Create Your Account and Select Your Printer
Setting Up 3dplotter.xyz
Why 3dplotter.xyz?
3dplotter.xyz is a specialized web application designed specifically for converting 3D printers into pen plotters. Unlike generic G-code generators, it provides:
- Printer-specific profiles with pre-calibrated settings
- Visual canvas for real-time design preview
- Offset compensation for pen mount positioning
- One-click G-code generation optimized for drawing
- No installation required - works in any modern browser
Account Setup Instructions
1. Navigate to https://3dplotter.xyz
2. Click "Get Started" in the top right corner
3. Create your account using:
- Email address and password
4. Verify your email (check spam folder if needed)
5. Continue to Checkout to do your payment
6. Login to start designing
Selecting Your Printer Profile
1. Select Bambu Lab A1 Mini from the onboarding modal
2. Select it as your active printer from the drop down that appears at the top:
- Build volume dimensions (180 × 180 × 180mm)
- Pen offset coordinates
- Drawing area boundaries
- Default Z-axis heights
3. Enable the pen toggle next to the dropdown
Downloading the Pen Mount STL
1. Press the "Printers" button in the top right
2. Navigate to the "3D Models" tab within the printer settings
3. Locate "A1 Mini Pen Attachment" in the models list
4. Download the STL file to your computer
5. Alternative: Visit the direct MakerWorld link provided in the app
Print the Pen Mount
Preparing Your Slicer
Recommended Slicer Settings for Bambu Studio:
Material: PLA (any color)
Layer Height: 0.2mm (standard quality)
Infill Density: 20% (sufficient strength)
Infill Pattern: Gyroid or Grid
Wall Loops: 3-4 perimeters
Top/Bottom Layers: 4 layers each
Print Speed: 50-80mm/s
Supports: 45° angle tree supports (required)
Support Interface: Enabled
Build Plate Adhesion: None required
Estimated Print Time: 45-60 minutes
Filament Used: 150-200g
Support Placement Guide
Critical support areas:
- Pen holder opening (horizontal overhang)
- Mounting clip underside
- Any angles exceeding 45° from vertical
Support removal tip: Remove supports gently with needle-nose pliers, working from the bottom up to avoid breaking the pen holder walls.
Post-Processing Steps
1. Remove all support material carefully
2. Test fit your pen - it should slide smoothly without binding
3. Check mounting clips - they should be flexible but not loose
Recommended Pens (Tested Compatibility)
Stabilo Fineliner Point 88 | 0.4mm | ⭐⭐⭐⭐⭐ Excellent |
Pilot G2 Gel | 0.5mm | ⭐⭐⭐⭐ Very Good |
Uni-ball | Signo | 0.5mm | ⭐⭐⭐⭐ Very Good |
Sakura | Pigma Micron | 0.45mm | ⭐⭐⭐⭐⭐ Excellent |
Staedtler | Triplus Fineliner | 0.3mm | ⭐⭐⭐⭐ Very Good |
Note: The Stabilo Fineliner Point 88 (0.4mm) is recommended for beginners due to consistent ink flow and optimal line weight.
Install the Pen Mount Assembly
Safety Precautions
- ⚠️ Power off your Bambu Lab A1 Mini before installation
- ⚠️ Unplug the printer from power
- ⚠️ Allow to cool if recently used (wait 10-15 minutes)
Removing the Extruder Cap
Step-by-step removal process:
1. Locate the extruder cap - This is the plastic cover on top of the hotend assembly
2. Gently pull out and upward as you see in the video - The cap is held by friction clips
3. Do not force - If it doesn't release easily, wiggle gently side-to-side
4. Set aside safely - Store the original cap for later reinstallation
5. Inspect mounting area - Ensure no dust or debris on the mounting surface
Photo reference points:
- Cap is located at the top of the toolhead carriage
- Two small alignment tabs on the top and on the center of the head
- Smooth plastic surface with Bambu Lab logo
Installing the Pen Mount
Installation procedure:
1. Orient the pen mount correctly:
- Pen holder clams faces forward (toward the front of the printer)
- Mounting clips align with the toolhead slots
- Flat mounting surface sits flush against the extruder body
2. Press down and in firmly until you hear/feel a click
- Apply even pressure on both sides
- The mount should sit completely flush
- No gaps should be visible around the edges
3. Test stability by gently wiggling the mount
- Should not move or rotate
- Should feel as secure as the original cap
- If loose, remove and reinstall
Loading the Pen
Proper pen installation technique:
1. Insert the pen from the bottom of the pen holder
2. For Stabilo where the cap touches the bottom of the pen holder is the ideal height, secure with a screw at the top of the pen holder
Height adjustment tips:
- Too low: Pen will drag and potentially tear paper
- Too high: Pen won't make contact with paper
- Perfect height: Pen tip just touches paper with minimal pressure
Create Your First Plot in 3dplotter.xyz
Activating the pen plotter interface:
1. Log into 3dplotter.xyz with your account
2. Locate the printer selection dropdown in the top toolbar
3. Find the "Pen" toggle switch next to the printer name
4. Click to enable - the interface will update to show:
- Drawing canvas with pen-safe area
- Pen-specific tools (line, curve, text)
- G-code generation optimized for 2D plotting
Understanding the Drawing Canvas
Visual indicators on the canvas:
- Black area: Safe drawing zone (fully accessible)
- Red area: Restricted zone (pen mount offset prevents access)
- Grid lines: 10mm spacing for precise positioning
Why is there a red restricted area?
The pen mount offsets the pen position from the original hotend location. The red zone marks areas the pen physically cannot reach due to:
- Pen mount geometry extending beyond the toolhead
- Mechanical limits of the gantry system
- Safety margins to prevent collisions
Usable drawing area dimensions:
- Bambu Lab A1 Mini total bed: 180 × 180mm
- Pen plotter usable area: ~160 × 160mm (accounting for offset)
- Safe margin from edges: 10mm on all sides
Design Creation Methods
Method 1: Drawing Tools
- Line tool: Click points to create connected line segments
- Curve tool: Drag to create smooth bezier curves
- Shape tools: Rectangles, circles, polygons
- Eraser: Remove unwanted elements
Method 2: Text Input
1. Click the "Add Text" button
2. Type your desired text (supports Unicode characters)
3. Choose font (options include Hershey fonts optimized for single-line drawing)
4. Adjust size and position
5. Text is converted to continuous line paths
Method 3: Pattern Generation
- Geometric patterns: Select from pre-made designs
- Hatch patterns: Adjust density and angle
- Parametric designs: Spirals, waves, fractals
- Grid patterns: Customizable spacing and line weight
Method 4: Image Import
1. Click "Import Image" button
2. Upload a line art image (PNG, JPG, SVG formats supported)
3. Recommended image types:
- Line drawings with clear edges
- High contrast black and white images
- Vector graphics (SVG) for best results
- Coloring book pages
- Technical diagrams
4. Adjust image-to-path conversion settings:
- Threshold: Controls which pixels become lines
- Simplification: Reduces number of points (faster plotting)
- Edge detection: Finds outlines in photos
5. Position and scale your imported design
Critical Plotter Settings
Z-Axis Configuration (MUST be correct):
Z-Draw Height: 12mm
Z-Lift Height: 20mm
for Stabilo
What these settings mean:
- Z-Draw (12mm): Height where pen tip touches paper and draws
- Lower values = more pressure (darker lines, risk of tearing)
- Higher values = less pressure (lighter lines, may skip)
- 12mm is calibrated for standard ballpoint pens on regular paper
- Z-Lift (20mm): Height where pen lifts during travel moves
- Must be high enough to clear the paper completely
- Prevents accidental marks during repositioning
- 20mm provides safe clearance for most setups
How to verify settings:
1. Navigate to "Plotter Settiongs"
3. Confirm Z-Draw = 12 and Z-Lift = 20
4. If values differ, update them and click "Save"
### Downloading Your G-code
Step-by-step download process:
1. Review your design on the canvas
- Check that all elements are within the white (safe) area
- Verify text is readable and oriented correctly
- Ensure no overlapping lines that would double-draw
2. Click "Download G-code" button bottom-right
3. G-code preview modal appears showing:
- Paths
- Layers
- Plate Size
- Plotter Settings
4. Final checks before download:
- ✅ Printer profile: Bambu Lab A1 Mini
- ✅ Pen mode: Enabled
- ✅ Z-heights: 12mm draw, 20mm lift
- ✅ Design fits within safe area
5. Click "Download" in the modal
6. Save to a memorable location on your computer
For Multicolor Pen Plotting
Create layers, each layer is exported as a single G-code, choose a different pen color for each G-code file.
Transfer and Run Your Plot
SD Card File Transfer
Preparing the SD card:
1. Remove the SD card from the printer's SD card slot
- Location: Right Side
- Push gently to eject
2. Insert SD card into your computer
- Use built-in SD card reader
- Or external USB SD card adapter
3. Open the SD card drive in your file explorer
- Windows: Shows as removable drive (E:, F:, etc.)
- Mac: Appears in Finder sidebar
- Linux: Usually auto-mounts to /media/
Transferring the G-code file:
1. Locate your downloaded .gcode file
2. Copy (don't move) the file to the SD card root directory
- Don't place in subfolders
- Keep the filename readable
3. Safely eject the SD card:
- Windows: Right-click drive → "Eject"
- Mac: Drag drive icon to Trash
- Linux: Right-click → "Unmount"
4. Reinsert SD card into the Bambu Lab A1 Mini
- Push until it clicks into place
Preparing Your Paper
Paper securing technique for best results:
1. Choose your paper:
- Standard printer paper (80gsm): Good for practice
- Cardstock (200-300gsm): Better for finished pieces
- Watercolor paper: Textured effects
- Avoid glossy paper: Ink may smudge
2. Position paper on the print bed:
- Align with the front-left corner
- Use scissors to cut the excess
3. Secure with painter's tape:
- Place tape strips on all four sides
- Smooth out any bubbles or wrinkles
- Press tape firmly to prevent paper movement
Running Your First Plot
Startup procedure:
1. Tap "Print files" on the touchscreen display
2. Navigate to "SD Card" section
3. Find your G-code file in the list
- Look for the filename you created
- Important: Select the file WITHOUT an underscore prefix
- Files with "_" prefix are thumbnails/metadata
4. Preview appears showing file info:
- Filename
- File size
- (No print time estimate for custom G-code)
5. Tap "Print" to start
6. Printer will begin homing - toolhead moves to corners
7. Pen will lift to Z-Lift height (20mm)
8. Plotting begins - watch the magic happen!
What to Expect During Plotting
Normal operation indicators:
- Smooth X/Y movements: Pen glides across paper
- Regular pen lifts: Between disconnected lines
- Consistent line quality: Even ink flow
- Quiet operation: Stepper motors at low speed
Troubleshooting Common Issues
Problem: Pen Not Drawing
Symptoms:
- Pen moves but leaves no marks
- Intermittent line gaps
- Very faint lines
Solutions:
1. Check pen functionality:
- Test pen on scrap paper by hand
- Replace if ink flow is poor
- Try a different pen brand
2. Adjust Z-Draw height (lower the pen):
- In 3dplotter.xyz settings, try: 11.5mm, 11mm, 10.5mm
- Download new G-code and test
- Find the sweet spot where lines are consistent
3. Verify pen installation:
- Pen should be vertical (use a level)
- Pen tip extends beyond mount
- No wobble or movement
4. Check paper surface:
- Some papers resist ink better than others
- Try different paper types
- Ensure paper is clean and dry
Problem: Paper Moving During Plot
Symptoms:
- Paper shifts mid-plot
- Lines don't align correctly
- Wrinkles or buckling
Solutions:
1. Add more tape:
- Tape all four corners securely
- Add strips every 30-50mm along edges
- Use wider tape (2-inch painter's tape)
2. Improve tape adhesion:
- Clean print bed with isopropyl alcohol first
- Press tape down firmly
3. Reduce paper size:
- Use smaller paper for complex plots
- Center smaller paper on the bed
- More tape contact points = more stability
4. Check for bed level issues:
- Run printer's auto-leveling routine
- Ensure bed is clean and flat
- Inspect for warping or damage
Problem: Printer Not Moving / G-code Not Running
Symptoms:
- Display shows file but nothing happens
- Error messages
- Toolhead doesn't move
Solutions:
1. Verify printer profile:
- Log into 3dplotter.xyz
- Confirm "Bambu Lab A1 Mini" is selected
- Re-download G-code with correct profile
Problem: Pen Dragging or Tearing Paper
Symptoms:
- Paper tears or punctures
- Heavy pen pressure marks
- Paper lifts off bed during travel moves
Solutions:
1. Raise Z-Draw height:
- Increase from 12mm to 12.5mm or 13mm
- Test with shorter plots first
- Find balance between contact and pressure
2. Use heavier paper:
- Switch to cardstock (200-300gsm)
- Thicker paper resists tearing better
- More stable during plotting
3. Reduce pen extension:
- Retract pen slightly in the mount
- Less leverage = less pressure
- Adjust until tip just makes contact
4. Check for pen mount misalignment:
- Reinstall pen mount - ensure it's straight
- Pen should be perfectly vertical
- No angle should be visible
Advanced Calibration Guide
Running the Calibration G-code
Why calibrate?
Every printer has slight variations in:
- Bed levelness
- Z-axis offset
- Pen holder manufacturing tolerance
- Pen tip length variation
Calibration procedure:
1. Download the Full or Compact calibration test G-code from 3dplotter.xyz:
- Navigate to the bottom of the right section
- Click "Full or Compact calibration test G-code"
- Or click Fractal Patterns
2. Transfer to SD card (same process as your plots)
3. Prepare calibration paper:
- Use A4/Letter white paper
- Tape down securely
- Mark with your name/date for reference
4. Run the calibration G-code:
- Select from SD card menu
- Calibration draws a series of test patterns:
- Straight lines (horizontal and vertical)
- Diagonal lines (45° angles)
- Circles (various sizes)
- Grid pattern (spacing accuracy)
- Text (legibility test)
5. Inspect the results:
Evaluating line quality:
| Line Quality | Z-Draw Adjustment | Action |
| Too light / invisible | Decrease 0.5-1mm | Lower pen closer to bed |
| Perfect / consistent | No change | Current height is ideal |
| Too dark / tearing | Increase 0.5-1mm | Raise pen away from bed |
| Inconsistent | Check bed level | Run auto-level, check pen mount |
Calibration interpretation:
✅ Good calibration result:
- All lines are visible and consistent
- Corners are clean (no overrun)
- Circles are round (not oval)
- Text is legible at small sizes
- No ink blobs or skipping
❌ Poor calibration - needs adjustment:
- Lines fade in/out
- Gaps in continuous lines
- Extreme pressure (paper dents)
- Misaligned corners
- Oval circles (indicates axis issue)
Fine-tuning steps:
1. Adjust Z-Draw by 0.5mm increments
2. Download new G-code with updated settings
3. Re-run calibration plot
4. Compare results - keep the best performing height
5. Document your ideal setting for future reference
Tips for Best Results
### Paper Selection Guide
| Paper Type | Weight | Best For | Ink Quality | Cost |
|------------|--------|----------|-------------|------|
| Standard Printer | 80gsm | Practice, drafts | Good | $ |
| Premium Printer | 100-120gsm | General plotting | Very Good | $$ |
| Cardstock | 200-300gsm | Final pieces, cards | Excellent | $$$ |
| Bristol Board | 270gsm | Professional work | Excellent | $$$ |
| Watercolor | 190-300gsm | Artistic effects | Variable | $$$$ |
| Kraft Paper | 70-120gsm | Rustic aesthetic | Good | $ |
Pen Selection by Project Type
Text and lettering projects:
- Stabilo Point 88 (0.4mm) - Clean, professional look
- Pilot Precise V5 (0.5mm) - Consistent ink flow
Design Best Practices
Optimizing designs for pen plotting:
1. Use single-line fonts (Hershey fonts) rather than filled fonts
- Plots 10x faster
- Cleaner results
- Less pen wear
Frequently Asked Questions (FAQ)
General Questions
Q: Will this damage my 3D printer?
A: No. This is a completely reversible modification that doesn't alter firmware, electronics, or mechanical components. The pen mount simply replaces the extruder cap and can be removed in seconds.
Q: Can I still use my printer for 3D printing after installing the pen mount?
A: Yes! Simply remove the pen mount and reinstall the original extruder cap. Takes less than 30 seconds to switch between modes.
Q: What if my printer isn't a Bambu Lab A1 Mini?
A: 3dplotter.xyz supports multiple printer brands and models. Check the website for your specific printer's pen mount design and profile. Popular alternatives include:
- Ender 3 series
- Prusa i3 MK3/MK4
- Creality CR series
- Anycubic printers
Q: Do I need to modify firmware or install custom software?
A: No firmware modifications required. All G-code is generated by the web app and is standard-compliant G-code that any 3D printer can read.
Q: How accurate is the pen plotting compared to professional plotters?
A: Modern 3D printers like the Bambu Lab A1 Mini have positioning accuracy of ±0.1mm, which matches or exceeds many consumer pen plotters. The main difference is speed—dedicated plotters may be faster, but quality is comparable.
Technical Questions
Q: What G-code flavor does 3dplotter.xyz generate?
A: Standard RepRap/Marlin/and other G-code, compatible with virtually all FDM 3D printers. It uses basic movement commands (G0, G1) and Z-axis control for pen lift/lower.
Q: Can I use the Bambu Lab's built-in network printing for pen plots?
A: Yes, but SD card transfer is recommended for first-time users to avoid complications. Once comfortable, you can transfer G-code via LAN with 3dplotter bridge app (in beta).
Q: What's the maximum plotting area?
A: For the Bambu Lab A1 Mini, usable plotting area is approximately 160 × 160mm after accounting for pen mount offset. Total bed is 180 × 180mm.
Q: Can I plot on materials other than paper?
A: Yes! Users have successfully plotted on:
- Wood veneer
- Fabric (with fabric pens)
- Cardboard
- Plastic sheets (with appropriate markers)
- Leather
- Canvas
- Whiteboard surface (dry erase markers)
Q: How do I plot in multiple colors?
A: Multiple plots: Plot each color separately with individual G-Code per layer
Software Questions
Q: Does 3dplotter.xyz work offline?
A: Currently, it's a web-based application requiring internet connection.
Q: Can I import SVG files?
A: Yes! SVG is one of the supported formats. The app converts vector paths directly to G-code for optimal quality.
Q: What's the file size limit for uploads?
A: Typically 10MB for images, unlimited for SVG. Very complex images may take longer to process.
Q: Can I save my designs in the app?
A: Yes, 3dplotter.xyz includes cloud save functionality. Designs are saved to your account and accessible from any device.
Q: Is there a mobile version?
A: The web app is responsive and works on tablets like iPad and has support for Apple Pen and other stylus. Smartphones are supported but may have limited functionality due to screen size.
Troubleshooting Questions
Q: My pen keeps lifting mid-line. Why?
A: This is usually a Z-axis configuration issue:
- Check that Z-Draw height is low enough (try 11-12mm)
- Verify bed is level
- Ensure pen is inserted deep enough in the holder
Q: Printer errors out when starting the plot. Help!
A: Most common causes:
- Wrong printer profile selected (check in 3dplotter.xyz settings)
- Corrupt G-code file (re-download)
- SD card filesystem errors (reformat to FAT32)
- Filename with special characters (rename to alphanumeric only)
Project Ideas and Inspiration
Beginner Projects
1. Greeting Cards
- Birthday cards with custom lettering
- Holiday cards with geometric patterns
- Thank you notes with hand-drawn elements
2. Labels and Tags
- Plant markers for gardens
- Gift tags with names
- Organizational labels for jars/boxes
3. Simple Line Art
- Logo tracing
- Icon sets
- Emoji collections
Intermediate Projects
1. Maps and Diagrams
- Neighborhood maps with street names
- Seating charts for events
- Floor plans or layouts
2. Educational Materials
- Math worksheets with custom problems
- Handwriting practice sheets
- Coloring pages
3. Art Reproductions
- Famous line drawings
- Architectural sketches
- Botanical illustrations
Advanced Projects
1. Generative Art
- Algorithmic patterns using code
- Fractal designs
- Parametric curves (spirographs)
2. Typography Projects
- Custom font specimens
- Calligraphy practice sheets
- Typographic posters
3. Technical Illustrations
- Engineering diagrams
- Exploded view drawings
- Circuit board layouts
4. Hatch Art (Filled Drawings)
- Cross-hatching for shading effects
- Stippling patterns
- Density-based image reproduction
Community and Resources
Where to Get Help
Official Resources:
- 3dplotter.xyz Documentation
- Video Tutorials: Check YouTube @3dplotter
- Discord Server: Real-time community support
Social Media:
- Instagram: @3dplotter.xyz - Share your creations with #3dplotter
- Reddit: r/penplotters - General pen plotter community
Sharing Your Work
Tag your creations with:
- #3dplotter
- #penplotter
- #bambulab
- `#a1mini
- `#plotterart`
Contributing to the Community
- Share your calibration settings for different paper types
- Upload custom pen mount designs
- Create tutorials for specific techniques
- Report bugs or suggest features on GitHub
Conclusion
Congratulations! You've successfully transformed your Bambu Lab A1 Mini into a precision pen plotter. This opens up a world of creative possibilities:
✅ Draw custom artwork without buying a dedicated plotter
✅ Create professional-looking cards and invitations
✅ Plot maps and diagrams for presentations
✅ Experiment with generative art and algorithmic designs
✅ Produce educational materials and worksheets
✅ Personalize gifts with custom lettering
What's Next?
- Experiment with different pen types and paper combinations
- Join the 3dplotter.xyz community to share your creations
- Try multi-color plots with manual pen swaps
- Explore generative art scripts and algorithmic designs
- Push the boundaries of what's possible with your converted plotter
Remember: The pen mount is completely reversible. Switch back to 3D printing anytime by simply reinstalling the original extruder cap. Your A1 Mini is now a two-in-one machine!
Related Resources
- 3dplotter.xyz - Main application
License and Attribution
This guide is provided free for personal and educational use.
Credits:
- Pen mount design: Available on MakerWorld
- G-code generation: 3dplotter.xyz
- Tutorial created by: Triantafyllos Rose Samaras creator of 3dplotter.xyz
Support the Project:
If you find this guide helpful, please:
- Share it with fellow makers
- Give feedback on 3dplotter.xyz
- Submit your creations to the gallery
- Consider supporting the developers
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Long-tail Keywords:
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Target Audience:
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Last Updated: February 5, 2026
Guide Version:2.0
Compatible Printers: Bambu Lab A1 Mini (extendable to other models)
Software Version: 3dplotter.xyz (latest)
Ready to create your first plot? Head over to 3dplotter.xyz and start transforming your ideas into physical drawings!