Dual Extruder Radal Fang Duct with BLTouch

thingiverse

This is my first remix, and I was not satisfied with the positioning of the BLTouch sensor mount on the LPA Modular X carriage at https://www.thingiverse.com/thing:2034743. The mounting point on the rear of the carriage, about 50 MM from the hotends, resulted in a loss of approximately 50 MM of Y-axis travel. Due to the large bed size, it was physically impossible to arrange the stock rails to regain this amount of travel. This design will also fit any other X-carriage that you choose to use, as it attaches to the top mounting screws of the hotend. It is specifically designed for the Stock Tarantula dual hotend (E3d Chimera clone). If you are looking for a daughter plate for the LPA Modular X carriage for this hotend, the Chimera plate from https://www.thingiverse.com/thing:1829292 works perfectly. The design also includes a mount for a radial blower such as the following: https://www.amazon.com/gp/product/B00MJU6JR2/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1. I found that I got better airflow with less vibration from the radial fan than from a 40mm fan on the Fang Duct. Works for me with .3mm probe offset (G-code G30 Z0.3 after leveling process with my BLTouch). This changed when I switched from Smoothie stable to the latest Smoothie Edge, so your mileage may vary. Supports are only necessary for the bottom area, up to the base of the fan mount. The rest can be printed without supports if you have a part fan installed. Without a part fan, supports are also required for the top. Make sure you add supports "from bed only" to prevent support material from being generated inside of the duct and impeding airflow. I had better luck printing with a raft, but you may be able to print this thing without it.