Rostock Max Extruder - DEPRECATED

thingiverse

I've retired this version and introduced an updated one. The post where the bearing attaches to the lever arm can become weakened and break off after several hundred hours of printing. I've modified the design to utilize a 3mm screw to secure the bearing to the lever, making it significantly stronger and virtually unbreakable. Find the revised version here: http://www.thingiverse.com/thing:2013618 Following a very high failure rate when printing Ninjaflex, I decided to seek out a solution. That's when I came across the extruder designed by Singh336. It was an excellent extruder and I successfully printed both Ninjflex and TPU using it. However, when I attempted to print with TPE 80A filament, it jammed in the extruder just like Ninjaflex does with the standard EZStruder. TPE 80A is softer and more flexible than Ninjflex. I noticed a few shortcomings in Singh336's extruder design, so I decided to create my own. While mine is built from scratch, it heavily draws inspiration from the design by Singh336. Benefits: The lever arm will not twist like the standard lever arm. The knob features a flattened area for perfect alignment with the stepper shaft. It comes equipped with a mount. The feeder hole is positioned closer and more accurately aligned with the hob roller and bearing. The spring block is situated closer to the lever, providing a more compressed spring and increased pressure on filament. The filament entry point is taller and funnel-shaped, making it significantly easier to insert filament. All parts can be printed without supports. Suggestions: The lever arm must be robust and stiff. I recommend using a high infill setting with a honeycomb pattern. The knob may be a very snug fit and require some filing to install properly. Use an 8mm socket and screwdriver handle to secure the pressure fitting into the hole. Hardware: 3 - M3 x 8mm screws 1 - M3 X 25mm screw 4 - M3 washers 2 - #6 X 1.5 inch screws (for mounting, or simply reuse the original screws, but they are a bit long) 2 - #6 locknuts (can reuse the original locknuts) 1 - 3x10x4 mm bearing (just reuse the original bearing from the lever arm) Results: I've successfully completed a 3-hour print with TPE 80A and the results are outstanding.