Tronxy X5SA Dragon BMG 5015 Hotend Mount

thingiverse

This is marked as a work in progress since I still have some other printer work to finish and more testing to do, but should be ready for use. A remix of a mounting solution for my BMG Dragon Hotend remix (https://www.thingiverse.com/thing:4606399). For the main mount, I re-worked the mounting plate to fit the X5SA Pro better, and changed the size of the longer fan duct (shrank by 2mm) to better center on the dragon nozzle. I also thickened the mounting face of the stepper by 2mm. The drive gear that came with my TriangleLab BMG flared a little too soon and would bind the gear in the extruder. 2mm moved it back far enough to function smoothly. Assembly instructions can be found in the re-mix source. For the belt mount and BLTouch support, I moved the BLTouch mount to be inline with the dragon nozzle, and made it solid. I used threaded inserts at the bottom. The BLTouch will hit the edge of the bed Left, Right, and Back, but hits 40mm in from the Front edge of the bed. All the solutions I found were losing 40mm on at least one side, I chose to allow even Left to Right probing. There are 2 endstop support STLs included. I had to change the mounting hole position and include a well for solder joints for the style that came on my printer. This also moves the belt tension adjustment from the front plate to the back one. Loosen the screw, pull the belt through, and re-tighten it. Use screws long enough to let you easily move the belt without removing the screw all the way from the nut. Ultimately, paired with the re-worked BMG housing this holds the dragon hotend securely in place so you can do the "one handed" nozzle changes. No need to hold the heatblock with pliers or a wrench. Use a 20-23 mm pancake stepper. I used a 20mm thick LDO-42STH20-1004ASH. A 23mm thick stepper will JUST clear the front rail (<1mm). STEP file for my changes included. STEP file for the BMG housing at the link above. STEP files for the originals can be found in the source items.