Effect of the extrusion FLOW RATE to strength of 3D printed object

Title: Effect of the extrusion FLOW RATE to strength of 3D printed object. Watch on youtube:

Tags: 3dprint, strength test,

In this video I would like to see what is the effect of the extruding flow rate (or extrusion multiplier) to the strength of 3D printed object. The idea came when I did the review of digital microscope and I was analyzing a broken test specimen and I saw those gaps between the printing lines.

Material: 3D Active PLA, 0.2 mm layer height, max walls (perimeters), 215°C/60°C (additional test with 2 perimeters and 20% infill). Printed on Prusa MK3S

Digital microscope:
On Banggood:
Review video:

Check E-steps (from 15:05):

At the botton of this page: Download STL of test objects and results as image (for mobile users, so you can zoom in)

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0:00 About flow rate
0:44 Settings in Prusa Slicer
1:03 Settings in Cura
1:18 Introducing the experiment
1:50 About test specimens
3:59 Dimensions and weight
5:46 Under the microscope
6:18 Layer adhesion test
7:25 Tensile test
8:50 Hook test
10:09 Results
12:05 Additional test
13:20 Conclusions


Download files:

hor_4x4mm.stl 62.7 kB [View»]
results-flow-rate.png 66.6 kB
testHook_75percent.stl 175.9 kB [View»]
ver_4x4mm.stl 243.9 kB [View»]
vertical_d10.stl 868.6 kB [View»]

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