M2-Extruder tighened up throat for Flexible materials

thingiverse

I modified the original design to work with Ninja Flex and Filaflex. I optimized the filament path by dramatically closing it up, which allows for successful printing of flexible materials. To achieve this, I reduced the stock PLA speed by 40%. This printer utilizes the stock extrude gear and V3B 24V hotend. To improve the print process, I enlarged the feed tube hole to 3/16" to keep it free-standing and prevent clogging. I also increased the bearing clearance in the filament path to reduce jamming when printing with soft materials. Convenience was also a consideration in my design: I added a loop outside the printer for zipping wires together. For users who require more security, I included two holes for screws to attach a hot end retainer – although I do not use one personally, this option remains available for those who need it. I have successfully printed with various materials on this modified extruder: PLA, ABS, PET, Filaflex, and Ninja Flex. To ensure optimal performance, it's crucial to slow down the loading process of flexible materials. For M2 Standard printers using a .35mm nozzle coated in painter tape, I recommend setting the following parameters: - 3mm retractions - A retraction speed of 2400mm/min - Wipe at 20mm depth - An extruder temperature of 215°C - Bed and layer one fan settings: off for bed and 100% for other layers I've found it helpful to load flexible filaments at a reduced rate compared to PLA or ABS, usually at 200mm/min. Loading 10mm of filament at a time also facilitates easy expulsion of old material. On June 7, 2017, I upgraded to the V4 hotend and needed to redesign this modification for my M2 Standard printer. Testing was completed during the weekend and is still in progress. To print this design, please refer to these specifications: - Print material: ABS - Scale: 100% - Fill density: 80% Keep in mind that overhang areas will require support. However, M2 printers do not need it for printing holes – they produce high-quality results without it.