MMU2S Selector - Large Bore, With Magnet, 18mm round cutter

thingiverse

This remix combines various MMU2S selectors into a single design, incorporating features from other alternatives not found on Thingiverse. One key improvement is the inclusion of a larger bore tapered filament path to reduce jams, a common feature in many alternate selectors. The design also features a magnet mount for the filament sensor steel ball, enhancing sensor reliability. To accommodate the magnets that come with Mk3/Mk3S/MMU2S kits, I enlarged the magnet pocket as much as possible without compromising stability. The magnet fits snugly, but it's still possible to press it out through a provided hole. A significant modification is the conversion to accept an 18mm round cutting blade, commonly used in fabric cutters. This change has proven effective in eliminating jams caused by the stock cutting blade. Although the cutting blade is not currently utilized in MMU2/MMU2S software, this upgrade provides some ability to control stringing. The redesigned cap ensures secure clamping of the new cutting wheels, which have a slightly larger inner diameter than the originals. Testing has been successful so far, with PETG highly recommended for use due to its durability and resistance to cracking. Using PLA may cause damage to the FINDA mount, highlighting the importance of choosing the right material.