Scalable CoreXY V2 (HICTOP Prusa i3 hardware Converted to CoreXY)

thingiverse

This is my latest version of Scalable CoreXY. The V1 (http://www.thingiverse.com/thing:1587260) was too big, so I downsized it to fit the HICTOP bed (220x270mm x 200). I'm using the same motors, power supply and control board from the HICTOP to keep things simple. I've already upgraded my hotend to E3D V6 and the lead screws, which are the components I chose for this version. With this design, I also used the same smooth rods and linear bearings. To reduce weight, I 3D printed the linear bearings in semi-translucent PLA and applied grease before attaching them to the smooth-rods. So far, they're working great. You can find the bearings here: http://www.thingiverse.com/thing:1829916 I tried using Marlin 1.1 RC7 but had constant buffer issues. I switched to Marlin 1.1 RC3 and 5, which solved the problem. Since I'm still refining this design, I went back to Repetier Firmware like on my V1 printer, just updating the sizes for the smaller V2. The carriage is designed for a single hotend, but I plan to test dual extruders later on. On my Prusa i3, I tried that and found it's only feasible for large prints due to contamination between filaments. However, leveling is easier, power consumption is lower, and oozing issues are mostly gone. Find the carriage here: http://www.thingiverse.com/thing:1829930 The extruder can be found here: http://www.thingiverse.com/thing:1859692 For bed movement, I considered designs with 4 smooth rods but it didn't make a difference in practice. It made the bed heavier and harder to move, plus it created issues with two leadscrews out of sync. If you're using the same threaded rods from HICTOP, check this: http://www.thingiverse.com/thing:1859730 Update (2017-05-10) I've been busy with work and life so updates have been slow here. I uploaded my source files for anyone interested in making or editing this design: CoreXY_V2.0_Cleaned.2.rsdoc is the complete drawing of all parts. Repetier-Firmware-1.0.0dev_2016-10-31.zip is the current firmware running on the printer. It's been successful and prints well, but there are a few kinks to work out and features to add. I'm thinking about placing filament rolls and feeder on top or inside the printer, but no decision yet. I've seen some under-extrusions due to the lack of a proper filament roll holder, so that needs fixing soon. I'm testing a counter weight system for the bed to make it seem lighter and more accurate. The next project is enclosing the printer body and optimizing its footprint as a desktop printer.