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Shane Hooper edited this page Apr 25, 2021 · 29 revisions

SolidCore CoreXY

SolidCore CoreXY 3D Printer

SolidCore CoreXY: All Metal Platform

Our long term goal is to is to build a modular platform, not just a printer. Think of it as an ecosystem of parts that can be arranged in different configurations and adapted for unique applications.

  • All Metal Parts
  • Upgrades
  • Customizable

Mechanical Arrangement

All Metal CoreXY Platform With the motor and idler mounts placed on the inside corners of the frame gives us clearance to easily mount an enclosure. This configuration also eleminates any design constraints of overall length and width which maker the machine completely modular and scalable. Eventually we would like to have a spreadsheet or configuration tool that will allow you to input the current frame or linear rails that someone already owns and output length and rail options. Or if you’re aiming for a specific build area, you can input the data and it will output the frame and rail length options.The whole idea is to design an open-source corexy printer that is:

  • Modular
  • Scalable to a larger format
  • Linear Rails
  • BOM utilizes standard and available printer parts people already have so they can convert their printer into a SolidCore
  • Easily add an enclosure

CoreXY Mechanism

SolidCore Mechanical Arrangement While the SolidCore design is still a work in progress it’s slowly but surely materializing. For now we decided to go with a simple but functional design but still have many plans that will later be adapted for additional tools and configurations. We recently moved the z-axis motors to the bottom of the printer and are setup to either use three independent driven z-axis motors or a single driven motor with the belt path connecting to three z-axis lead screws.

CoreXY Mechanism

https://3ddistributed.com/product/corexy-mechanism/

We’ll probably make some changes such as reorienting the the y-axis linear rail into a vertical position similar to the RailCore, redesigning the carriages and motor/belt mounting plates where the z-axis motors are placed on the bottom of the machine. I’m also considering making the carriage components and rail support one piece similar to the latest update on E3D’s Tool Changing printer.

Belt Path

While the SolidCore 3D Printer design had a lot of influence from the Railcore's design, which also has the "x" shape belt path that some say “serves no purpose.” True, but you see the quality prints that the Railcore community is putting out. The print quality of the RailCore is AMAZING! Although the belts don't have to cross if the pulleys are at different z-levels. I originally thought that the difference between the hbot core xy design was that the corexy belts crossing segment.

CoreXY Kinematics

CoreXY Kinematics

The corexy kinematics is a complex motion system with dedicated stepper motors for each axis. The X and Y motors move together or opposite of each other to move the carriage from left to right or towards or away . If you were to move just one motor you would see the print head move diagonal.. If the two motors move opposite of each other the print head will move along the X-axis, If the two motors move in the same direction the carriage will move along the Y-axis. Read More https://3ddistributed.com/corexy-3d-printer/corexy-kinematics

Motor Movement

  • Both Motors Move Clockwise >> Carriage Moves Left
  • Both Motors Move Counter Clockwise>> Carriage Moves Right
  • Both Motors Move Opposite of Each Other>> Carriage Moves Toward & Away
  • One Motor Moves>> Carriage Moves Diagonal

Belt Routing

Offsetting the stepper motors with stacked belt path pulleys may give the belts a clean run and simplify belt alignment. A printer's motors can be offset at different heights so that the belt routing runs a straight belt path and don't have to be twisted. But this belt routing path would also mean that on one side of the gantry the belt would have the teeth on the side of the idler wheel which wouldn't run as smooth and could lead to artifacts within printed parts. We already designed and built the SolidCore with the crossed belt path so we're going to stick with it for now. Later on after many performance tests I'll try out some other design configurations to test out any changes.

CoreXY Motor Mount

I'll update the files when finished but there’s still a lot of work to be done. www.3ddistributed.com

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