Week 05 - Group assignment
The goal is to test the design rules for our 3D printer(s).
Printers specifications
We mostly have Raise 3D Pro 2 printers and also two Pro 2 plus (which works exactly the same). Here are som key characteristics:
- Maximum printing dimensions: 305 x 305 x 300 mm
- Maximum precision: 10 microns
- Speed: 30 - 150 mm/s
- Compatible materials: PLA / ABS / HIPS / PC / TPU / TPE / NYLON / PETG / ASA / PP / Glass fiber / Carbon fiber / Bronze / Wood
- Filament diameter: 1.75mm
- Extrusion: Double extrusion, direct extrusion system
Also we generally use 0.4mm nozzles, mostly in brass.
Torture test
We printed a torture test our instructor advised us from Autodesk. You'll find the files and the insctructions in the following github repository
We sliced it for our printers (one for a Pro2 model and one for a Pro2 plus model) for standard ABS and PLA filaments, with 0.05 mm layer heigth, and with a raft (approx 18 hours printing!)
Both prints went quite successfully. We can notice some important stringing though.
Left: ABS print. Right: PLA print
Analyzing the prints
Dimensions accuracy
Using a caliper, we can measure the dimensons accuracy in x and y thanks to the stack of cylinders.
Here are the results or the PLA print:
| target | pla x | pla y | x error | y error |
|---|---|---|---|---|
| 25 | 24,9 | 24.86 | 0.1 | 0.14 |
| 20 | 19.88 | 19.86 | 0.12 | 0.14 |
| 15 | 14.9 | 14.91 | 0.1 | 0.09 |
| 10 | 9.93 | 9.89 | 0.07 | 0.11 |
| 5 | 4.97 | 4.88 | 0.03 | 0.12 |
| average error | 0.084 | 0.12 | ||
| average error of average errors in x and y | 0.102 |
And the results for the ABS print:
| target | abs x | abs y | x error | y error |
|---|---|---|---|---|
| 25 | 24.72 | 24.8 | 0.28 | 0.2 |
| 20 | 19.82 | 19.81 | 0.18 | 0.19 |
| 15 | 14.83 | 14.79 | 0.17 | 0.21 |
| 10 | 9.90 | 9.92 | 0.1 | 0.08 |
| 5 | 4.87 | 4.90 | 0.13 | 0.1 |
| average error | 0.172 | 0.156 | ||
| average error of average errors in x and y | 0.164 |
Overhangs
The ABS print could correctly print the overhangs at 45 and 30° tilt. The PLA print could correctly print only the 45° tilt overhang.
Bridges
The ABS print could successfully print the first bridge only. The PLA print could successfully print the three first bridges.
XY Resonance
None of the prints presented ringing effects neither on the X axis nor the Y axis.
Fine details
All small cylinders could be removed easily from their slots.
Other remarks
The PLA print globally present a better underneath surface than the ABS print. The top surface also present a better resolution on the PLA print than on the ABS print.