Design Capabilities¶
The Design settings we analyzed were: (These are ChatGPT AI assisted answers from putting the list in and asking "Explain these 3D printing characteristics and why they are important: “ ) Then I augmented the explanations with information from Angela Horstman and Dorian Friztes who are very well versed in 3D printing.
I wanted a cheatsheet for the future that was really in the weeds. with the design Testers that Angela Found
Bridging Capabilities¶
Bridging Capabilities
| What it measures | Why it's important | What you're looking for | Good bridging depends on |
|---|---|---|---|
| How well your printer can print filament across an open gap without support underneath. | - Reduces need for support material - Improves surface quality - Saves time and filament |
- Minimal sagging - Straight lines across gaps - No drooping or curling |
- Cooling - Print speed - Temperature |
Temperature Settings¶
| What it measures: | Why it's important: | You choose the temperature that gives: |
|---|---|---|
| The best nozzle temperature for your filament. Each section prints at a different temperature. | Too hot: Stringing Blobs Poor overhangs Too cold: Weak layer bonding Rough finish Under-extrusion |
* Best surface finish Strongest layer adhesion Least stringing |
Overhang Test¶
* Tester: https://www.thingiverse.com/thing:2972495
| What it measures: | Why it's important: | Look For: |
|---|---|---|
| The steepest angle your printer can handle without supports. Test models usually step from: 30°, 45°, 60°, 75° | Helps you design parts that: * Don't require supports Print cleaner Use less material |
Stringing Test¶
Stringing Test
* Tester: https://www.thingiverse.com/thing:2080224
| What it measures: | Why it's important: | Controlled by: |
|---|---|---|
| How much filament oozes during travel moves. | Too much stringing causes: "Spider web" threads Messy surface * Post-processing cleanup |
* Retraction distance Retraction speed Temperature Quick Fix: Hit with heat gun - but don't melt your projects |
Tolerance Test¶
Tolerance Test - missing this picture.. I think kim or angela took it.
* Tester: https://www.thingiverse.com/thing:3051094
| What it measures: | Why it's important: | Typical FDM tolerance: |
|---|---|---|
| The smallest gap your printer can accurately produce. Common tests include: Nested cubes Sliding blocks * Hinges printed in place |
Determines: Fit between parts Snap-fit design capability * Moving assemblies |
0.2–0.5 mm FDM - ???? |
Wall Thickness¶
| What it measures: | Why it's important: | Rule of Thumb: |
|---|---|---|
| How accurately your printer can print thin vertical walls. | * Structural strength Dimensional accuracy Prevents fragile parts |
Walls should usually be multiples of your nozzle diameter. |
Engraving Quality¶
* Tester: https://www.thingiverse.com/thing:1278865
| What it measures: | Why it's important: | Affected by: |
|---|---|---|
| How clearly small details like text or logos print. | * Branding Labels Decorative parts * Functional markings |
* Nozzle size Layer height Flow rate Small nozzles = sharper details. |
Hole Quality¶
* Hole Quality
* Tester: https://www.thingiverse.com/thing:242437
| What it measures: | Why it's important: | Design Tip: |
|---|---|---|
| How round and accurate printed holes are. FDM printers often print holes slightly undersized. | * Screws fitting properly Bearings Mechanical assemblies |
Oversize holes slightly (~0.2–0.4 mm). |
Scale¶
Spherical Object Test¶
- Tester: (link pending)
| What it measures: | Why it's important: | Design Tip: |
|---|---|---|
| How round and accurate printed holes are. FDM printers often print holes slightly undersized. | * Screws fitting properly Bearings Mechanical assemblies |
Oversize holes slightly (~0.2–0.4 mm). |