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Velocis

Created by [Euwain Sheard] • Started on May 24, 2025

Ultra Fast CoreXY auto ejecting 3d Printer

Project Velocis

Author: Euwain Sheard

Description Ultra Fast CoreXY auto ejecting 3d Printer

Total time spent: *11h*

May 24 (Day 1): Started CADing and Part Sourcing

I started by looking at various parts and how they would fit into my project. This is what I decided on so far

Part Price
Phaetus RAPIDO HOTEND $80
Octopus Pro $70
Orbiter v2.5 $50

I might change this later, but I like these parts

Now to Cad! I have taken inspiration from the Voron Trident for the design of the frame and triple lead screw z axis

Picture of the cad

I am, however, having trouble with the extrusion files I found...

Time spent: 2h

Day 1 Part 2

I worked on the Cad some more. I fixed the extrusion problems by uses these files instead. However this meant that I had to redesign the frame. When I redesigned the frame I decided to change some of the extrusion lengths. Now instead of 370, and 500, I shortened the extrusions to 350 and 450. I also modeled some of the x, and z gantry. I also organized some of the components, mainly the extrusions, into folders. I am going to use a mixture of Fusion 360's internal and external component options.

Updated Picture of Cad


Time spent: 1.5h

May 25 (Day 2): Cad

I started today by finishing CADing the basic frame, and looking at various linear rails. I found these on the Voron sourcing guide for my y axis, but I am going to shop around for better prices. I am going to attach the Linear rails on the bottom of the aluminum extrusions, so I can install a cable chain later.

I haven't CADed the linear rails yet, maybe I'll do that later today.

Picture of Cad


Time spent: 1.5h

Day 2 Part 2: Cad

I started by finding models of the linear rails I am going to use. I am going with MGN9H for the y axis, which is what I am designing. I have no idea how this is all going to fit into the budget.

Then I started to CAD. I first modified the length of the files I found from 390 mm to 300 to use them in my design. Then I imported them and attached them to my frame with joints. Then I imported the carriages into the design and used a sliding joint to attach them to the rail. It took me a little time to figure out, but in the end I got it. I then imported another aluminum extrusion to work as my x axis.

Pictures of Cad

Added X axis extrusion


One of the linear rails


Time spent 1.5h

Day 3 (May 26): Tried to Cad and looked up corexy kinamatics

Today I started to Cad the connectors between the x axis gantry and the y axis linear rails, and completed this only to find out that one of the linear rails was not in the right place. Then I spend way to long only to not figure it out. This problem is really frustrating. I have looked at all the joints and sketches and what not, but couldn't find the error.

I decided to take a break and further my knowledge of corexy kinamatics. I have a basic understanding but want to learn more about it I found this really useful website that explains it.

I don't have any pictures of Cad for the moment, I am still working on the error 😔

Day 3 Part 2: Fixed error

I took a break for a bit to work on another project, after I came back to Fusion I had an idea to delete the sketch and look at the joint which was broken, and then undo it and fix the joint. This didn't work, but I was able to remake the sketch and that fixed it!.

Now I can finally work on connecting the extrusions!

I added an simple part to connect the extrusion to the linear rail, I still need to make the other one and add belt paths.

Pictures of Cad


Time spent 2h

Day 4 (May 27): Cad

Today I started by mirroring the linear rail connector. I then started on the x axis linear rail. I connected the rail, but not the carriage. I will either do that later today or tomorrow.I also need to make the belt path and the idlers and pulleys.

I will upload photos of cad when I finish the x axis linear rail either later today or tomorrow.


Time spent 1.5h

Day 4 Part 2:

While making the gantry frame I encountered an error.

the joint was from one of the linear rails (I had previously connected the other one) to the x axis. T

I eventually fixed this error by removing one of the linear rail slider joints and it worked fine. Then I went in a search for my other linear rail. I have decided to a MGN12H linear rail.

Todo list for later

  • Model Belt Path with Pulleys
  • Model Z axis
  • Model Hotend
  • Find remaining parts

Pictures of CAD:


Time spent 1hr