Adjustable SN04 Auto-level Sensor Mount for Anet A8, Mesh-leveling-friendly

thingiverse

This is an updated version, the original one can be found here: https://www.thingiverse.com/thing:3631522. The cooling fan duct used is the Mistral 2.1a: https://www.thingiverse.com/thing:2121279. The main goal of this sensor mount is to position the SN04 so that the entire bed can be measured for mesh-leveling while giving easy sensor height adjustability without compromising thermal stability with the removal of the heatsink. Height adjustability is achieved by using an M3 screw, a feature I consider mandatory these days. This revision includes a fan shroud (as promised from v1.0) for a 25mm fan (not 40mm like the stock fan) and a slightly modified base plate to accommodate the changes. The fan shroud has some oddities built into it as I designed it in a hurry so it's not perfect, but it is functional. The shroud covers the side of the extruder where the heatsink used to reside. It has some ducting that redirects most of the airflow straight up as to not affect the print. Without the mass of the heatsink and some airflow, everything metal on the carriage sometimes would get hot. Not "can't-touch-it" hot but really, really warm with the right set of conditions. This new version does away with that thermal issue. The original thing has the full write-up, but if it's TL;DR... PROS: - Works with common SN04 leveling sensor - Sensor range covers the entire area of the hot bed. - Fine tunable height adjustment by turning an M3 screw. - Compatible with very efficient common fan duct model. - Reduced X-axis carriage weight compared to stock assembly. CONS: Sensor can run into left Z-axis rod coupling during X-axis homing at low bed and Z heights (sensor wiggles out of the way though). Fixed by increasing Z homing height in Marlin.