CoreXY V-wheel upgrade

thingiverse

CoreXY V-wheel Upgrade *July 2019 All parts work, except need to lower the final cable chain mount to the frame of the unit* I'm working on a design for a larger printer (500x500+ bed) and testing it with my Zonestar Z9M3 printer. This design is meant to be used in conjunction with a V-wheel upgrade. I've made significant progress, printing the last parts that are my drill jigs to ensure all the holes in the 2020 and 2040 bars are correctly placed. The rest of the parts have been tested for fit and operation but haven't been installed in a printer yet (*hopefully this week*). I'm using optical and old-type endstops, which provide accurate positioning. To maintain optimal performance, I've made the normal back of the printer the front so that no belts run in front of the model. Motors are also positioned up front, with plans to cover some areas to make them safe. Currently, I'm utilizing RailCore's motor and pulley mounts. Unfortunately, picture images do not accurately represent these lining up. For reference, see https://713maker.com/railcore/railcore-ii-non-zl-series-motor-mounts AND https://713maker.com/railcore/railcore-ii-idler-pulley-mounts *Note: No links are affiliated to me; they're simply references.* A problem I've encountered is that the chain pulls down on the back of the hotend during single-layer prints, causing a slight tilt at the far end of the bed from the chain mount. However, normal prints are unaffected. To address this issue and provide additional support for weight at the hotend location, I need to redesign the cable management layout. I plan to make the final version in aluminum CNC. Additionally, I've redesigned my belt tensioner to use a small 20-toothed pulley instead of the original 60-toothed one. Some parts will require filing and adjustment to achieve tight fits, as I'm working with a 0.1mm addition to any holes to compensate for my printer's limitations. I also plan to create a solid plate for all pulleys, motors, and other components to ensure square mounting. This upgrade is overkill for the V-wheels layout but necessary to test before moving on to rails. All bolts are M5 with lengths marked in the pictures. Some small screws are needed for endstops. I'm also using brass heat inserts for some M5 bolts. For reference, see https://www.amazon.com/gp/product/B077CHGNRV/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1 *Note: No links are affiliated to me; they're simply references.* I'm eager to share more updates and receive feedback, ideas, or comments on maximizing CoreXY for accuracy. I'm particularly interested in non-CoreXY configurations, such as attaching the X motor to the X rail and using a separate motor for Y. Additionally, I'm looking into 3-point Z motors to adjust bed level. Other features I'm exploring include: • Easy insert/remove hotbed • Filament above printer to allow short Bowden tubes • Seven-filament hotend with innovative designs I look forward to your input!