Performance tests that are worthy of challenging

I've been curious about how Bulbul Junior, my homemade Kossel Mini, performs and what's limitation of it.
My confidence of 3D Printing went up lately after layer fan installation and understanding the temperature control.

General specification of Bulbul Junior
RAMPS 1.4 controller
E3D V6 Hotend, 0.4 mm nozzle
PLA 1.75 mm filament


Impeller
Layer height: 0.1 mm


The Marvin on 3D Hubs
Layer height: 0.05 mm


Excerpt from Make (makezine.com) Vol 42, WHAT IS PRINT QUALITY?, p35

DIMENSIONAL ACCURACY TEST:
Probes a printer’s ability to fabricate dimensionally correct geometries in the XY plane. Reveals
backlash in X and Y directions if present.

OVERHANG TEST:
Tests printer’s ability to compile overhangs at 30, 45, 60, and 70 degrees.

BRIDGING TEST:
Gauges printer’s ability to span unsupported horizontal gaps of 20mm, 30mm, 40mm, 50mm, and
60mm.

POSITIVE FINE FEATURE TEST:
Tests printer’s ability to resolve fine features (from 3mm square to 0.4mm square).

TOLERANCE TEST:
Quantifies printer’s ability
to resolve fine negative space features in the XY plane, specifically the clearance between a
captive pin and a hole.

XY RESONANCE TEST:
Tests the printer’s ability to resolve single-extrusion width features and exposes resonance
in the XY gantry.

Z RESONANCE TEST:
Exposes mechanical issues in the Z motion system.





You can download the test models on
Make: 2015 3D Printer Shoot Out Test Models (http://www.thingiverse.com/thing:533472).

I printed three of the test models for the past few days. And the results gave huge embarrassment so
I swallowed pride, got back the humility again as a learner.

Fine Positive Features test was the worst.


I managed to print the cones after many trials, tweaking Slic3r and Estep calibrations.
I still need to find the right retraction setting though.
Layer height: 0.1 mm




Overhang test

By Cura




By Slic3r


Ugly back side


Bridging test


Now I feel like I'm back to square one. Two outstanding issues are over extrusion and retraction.

Regards,
Hughe

Edited 1 time(s). Last edit at 07/04/2015 01:23AM by janpenguin.

Nice prints man. I think that if everything went well we would all be terribly bored. It's killing me that I'm almost out of filament and have no time to go get more. Thanks for the post.

Hughe,

These calibration parts are designed to be challenging, so do not be discouraged, you are learning a lot and improving the quality of your prints!

Just an FYI there is a link buried in the comments on the thingiverse page that has good info

here is the link:

[makezine.com]

Sweet, I am so going to have to try them out and see how well my modified folger tech kossel 2020 does.

I did E steps fine tuning by Triffid_Hunter's guide.
Original E steps was 462.80. Present E steps is 443.09.

Infill 95% | solid layer (100% infill)


Slic3r setting for the bridge

Temperature: 185C
Layer fan speed: 100%
Layer height: 0.2 mm
Bridging speed: 10 mm/s