If you want accurate motion, you need a CoreXY 3d printer design with straight and parallel belt paths. Belt tensioning can change when the belt length changes as the gantry moves. Otherwise racking or belt tensioning issues may occur. Belt segment that changes length must be parallel to the axis as it moves to avoid racking or other undesired motion that can occur. Belt thickness must be taken into account when laying out your pulleys. The belt sections between motor mounts and idler mounts need to be parallel with the axis as the gantry travels across.
All Metal Parts
The SolidCore aluminum parts makes the printer into a highspeed workhorse for repeated use. All-metal-parts and components will give us the durability and repeatablility needed. But we want people to have the option to use 3d printed parts so they can upgrade later on. Solid all metal parts are durable and less likely to deflect at high printing speeds. The aluminum components are also less likely to breakdown over time when introduced to the forces and heat from repeated use.
The carriage and gantry are designed to be light weight and strong. We currently use c-shaped aluminum stock because it reduces machining time. The reduced machining time and minimized waste helps but it’s a compromise. That’s going to change soon. We’ll probably make some changes such as reorienting the the y-axis linear rail into a vertical position similar to the RailCore but the current horizontal version will be easier to adapt an E3D Toolchanger.
Google Drive Folder (Documentation)
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