Belt 3d printers first showed up to the 3d printing scene when the Black Belt 3d printer was launched. The Black Belt printer is a closed source belt printer that sales for $13,600. The benefits and possibilities of a belt 3d printer are long prints and printing horizontal overhangs without support. In addition, the belt printer has the mechanical advantage for production 3d printing. As long as there is filament feed to the printer the machine can print for as long as you want. The ideal production printer that isn't restricted to part removal.
Carl developed the White Knight 3d printer out of necessity. He needed to print long parts but at the Black Belt price range of $13,600 this was out of reach. In addition to the high price tag of the Black Belt printer the next problem is the underdeveloped closed source platform and small x and y-axis travel distance That's when Carl developed the White Knight 3d printer. The White Knight 3d printer has a 400mm x 430mm print area compared to the Black Belts's 340mm x 340mm.
You can find the published design open-source on Thingiverse and Github. Check out Carl's Thingiverse post where he states "This is my design for a 400mm x 430mm x Infinity belt printer. The main design works around a CoreXY D-bot design. I've integrated the use of Linear rails and have designed the mount for the E3D V6 or Mosquito hotends(but mosquito fits without any modifications to the hotend".
All files are available on Carl's GitHub..
"I uploaded the files to GitHub for future ease of collaboration and in hopes as a community we can make this printer "Perfect""-Carl