This is a Gradient test with Voxelizer Gcode for the M3D Quad Crane. I've included the STL if you want to do different tests with the file. It should be 96mm tall. (just over 3.75") I saved the STL in Fusion360 in inches, so you may have to scale it if you're importing it into a different slicer. Feel free to modify the file to suit your needs.
PS If anyone has a way to make the gradient run horizontal, across the bed, I have a much thinner STL.
To help better understand how to use this file, I've included some instructions, using Voxelizer 2 (Experimental) with the M3D Quad, on a Microsoft Word document.
Overview and Background
Test prints for Gradients on M3D Quad Crane or other Multicolor 3D printers.
Lesson Plan and Activity
This is designed to help you figure out which motors push filament at different rates. It should help you in adjusting your slicer settings to gain the color that you're seeking.
M3D Quad Crane
Voxelizer (Experimental) as of 8/2019
(If using STL, you can use any multicolor printer that allows gradients)