In some recent testing of the E3d Revo we observed some ripples in the force data and calculated that these must have come from the interaction of the two main gears on the dual drive extruder. Now we need to find out if this is just a poorly made clone, or if the original Bondtech design for dual drive extrusion is flawed.

3Blue1Brown Fourier Transform:    • But what is the Fourier Transform?  A...  

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0:00 Extrusion Myth We All Believed
0:43 Extrusion History and Start of Dual Drive
1:25 Test Method
2:00 Fourier Analysis
2:56 Modified Clone Extruder Results
4:23 E3D Titan Extruder Results
7:32 Bondtech BMG-M Results
9:39 Understanding Results
11:32 Does Dual Drive Force More?