Fix Upcoming-Challenge markdown: remove duplicates and November content
Eric Spooner
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[← Back to Home Page](Home)[← Back to Home Page](Home)
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[← Back to Home Page](Home)
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# Upcoming Challenge: December 2025
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## [Challenge Title TBD]
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# Upcoming Challenge: December 2025# Upcoming Challenge: November 2025
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**This challenge will be announced at the December 10th, 2025 meetup!**
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## What We Know So Far
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## [Challenge Title TBD]## "Wait, This Was Printed? How Are There No Layer Lines?"
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**This challenge will be announced at the December 10th, 2025 meetup!**Can you achieve the smoothest, most layer-line-free surface finish possible? This challenge pushes your printer tuning, slicer settings, and material knowledge to the limit. The goal is simple but difficult: create a 25mm cube with 2 walls and no top that looks so smooth, people question whether it was actually 3D printed!
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## What We Know So Far## Challenge Details
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- **Challenge Announcement**: December 10, 2025 (at December meetup)### Materials & Constraints
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- **Challenge Announcement**: December 10, 2025 (at December meetup)
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- **Submission Deadline**: January 2026 (at January meetup)
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- **Judging**: January 2026 (during January meetup)
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- **Judging**: January 2026 (during January meetup)- **Filament**: 3D Fuel filament (any type: PLA+, Pro PLA+, PCTG etc.)
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## Challenge Details Coming Soon
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- **Nozzle Requirement**: Must use a 0.4mm nozzle (REQUIRED)
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## Challenge Details Coming Soon- **Estimated Filament Usage**: Approximately 3 grams (for reference only)
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- **Model Specification**:
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Challenge theme, requirements, and full details will be revealed at the December meetup. Stay tuned! - **Dimensions**: Exactly 25mm x 25mm x 25mm cube (REQUIRED)
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- **Wall Count**: Exactly 2 walls (no more, no less) (REQUIRED)
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--- - **Top Layers**: 0 (no top surface)
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- **Bottom Layers**: Standard (as needed for proper adhesion)
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**This challenge will become active on December 10, 2025** - **Infill**: 0% (hollow interior)
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- **Print Mode**: Standard FDM/FFF printing (no resin printing)
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### Competition Categories
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- **Smoothest Surface**: Best overall surface finish with minimal visible layer lines straight off the printer
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- **No post-processing allowed** - cubes must be judged as-printed
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### Judging Criteria
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1. **Layer Line Visibility** (100%): The appearance and visibility of layer lines - less visible is better
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- All cubes must meet basic challenge requirements (25mm cube dimensions, exactly 2 walls, 0.4mm nozzle, no post-processing)
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- Winner is determined solely by smoothness of surface and minimal layer line appearance
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- **Tiebreaker**: If two prints are too close to differentiate, the fastest print time wins
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### Submission Requirements
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- **Physical Model**: Bring your printed 25mm cube to the December meetup for judging
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- **Dimension Verification**: Must be exactly 25mm x 25mm x 25mm
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- **Wall Count Verification**: Must show exactly 2 walls when inspected
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- **Nozzle Verification**: Must be printed with 0.4mm nozzle
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- **Print Time**: Record and report your total print time (used as tiebreaker if needed)
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- **Settings Documentation**: Share your winning settings (layer height, temperature, speed, cooling, techniques)
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- **Process Notes**: Brief description of your approach
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## Timeline
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- **Challenge Announcement**: November 12, 2025 (at November meetup)
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- **Submission Deadline**: December 10, 2025 (at December meetup)
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- **Judging Period**: December 10, 2025 (during December meetup)
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- **Winner Announcement**: December 10, 2025 (end of December meetup)
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## Creating the Cube Model
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### Using the Provided Model
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**Download the pre-configured cube:**
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- **File Location**: [Challenge Files/November2025/Cube.3mf](https://gitea.ercomputersolutions.net/espoon/3DPrintMeetup/src/branch/master/Challenge%20Files/November2025/Cube.3mf)
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- **Pre-configured**: Already set to 25mm x 25mm x 25mm with 2 walls and no top
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- **Ready to slice**: Import into your slicer and adjust settings for your printer
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### Creating from Scratch
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See the full [November 2025 Challenge Details](https://gitea.ercomputersolutions.net/espoon/3DPrintMeetup/src/branch/master/challenges/November-2025) for complete instructions on creating the model using Bambu Studio, Orca Slicer, or other CAD software.
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## Tips for Success
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- **Lower layer heights** (0.1mm-0.12mm) help reduce visible lines
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- **Slower speeds** improve surface quality
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- **Temperature tuning** is critical for layer adhesion
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- **Proper cooling** prevents warping without sacrificing layer bonding
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- **Material choice** matters - some 3D Fuel filaments naturally produce smoother surfaces
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Challenge theme, requirements, and full details will be revealed at the December meetup. Stay tuned!
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---
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**This challenge will become active on November 12, 2025**
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**This challenge will become active on December 10, 2025**
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