Prusa i3 MK3S flexion extruder

thingiverse

I accidentally uploaded the wrong file, it's smoothed and thus won't work. I reattached (extrdar7) which should be fine for printing! Happy printing! The flexion's PTFE tube is offset from where the usual Prusa is, so I offset it. To get the flexion to work you may need an ungeared motor. The Prusa uses a geared motor and my gears kept slipping. The long-awaited extruder mount for a Prusa i3 MK3 (note the S)! I couldn't find one, so this thing was born. I'm not impressed with it, and the existing Prusa extrudar is better in every way. Prusa took the flexion head's good parts and added them to the MK3s. Just my two cents. This installs just like the standard extruder. The motor block part bolts on (with the same bolts) as the old mount. It takes the place of the old block. The Extrudar part is bolted on with two bottom screws. You could also drill a hole on the top right of the part and put a bolt through, but I don't think it was needed. The top part has a big hole for the filament, and one hole at a diagonal hole. The diagonal hole is used for adjusting the cam screw. Disassembly: Do not follow this to the letter, use your better judgement here, I may have forgotten a step. Turn off Printer Clip the three zip-ties on the bottom. Don't be cheap and not clip them, if you don't you could pull on your thermistor, and there goes $15. Remove the 4 screws holding the E3D cooling fan, remove fan Remove the 2 screws holding the print fan. Be very gentle with the print fan's wires. They break very easily. Behind the motor above the x-axis are 2 M3x40 bolts remove those Below the motor there are 2 M3x40 bolts kill those Remove the Pinda sensor. You may have to use a screwdriver to pull apart the plastic holding the Pinda in place. Remove the extrudar body (such that we can see the X-axis carriage. My memory is a bit shady here. There are 2 screws by the E3D cooling thing. There may be two more? Install: Take the new extruder part and install the two screws The flexion mount is bolted onto the top right, and left bolt holes. The bottom two holes are used for the motor block. The instructions for installing the flexion https://flexionextruder.com/support/i3-style-printer/. Ignore the words. Focus more on how it fits together. It will only go together one way, with the cam pushing the arm Re-Install the Pinda. Don't forget to calibrate it with a zip-tie! Bolt the motor block and extruder body together together Re-Install the fans Install the zip-ties on the bottom DO NOT PINCH ANY CABLES. BEFORE PRINTING CHECK TO SEE IF ANYTHING WILL BE SMASHED! When doing first layer cal completely remove the tension cam, otherwise it grabs too much PLA and the motor slips. Now is a good time to mention that when tensioning the flexion, error on way to less tension. If the motor slips that means too much tension. Below are my tensions thus far: PLA, Remove tension cam. Either my motor is really weak, or the flexion tension is really high Ninjaflex: Cam set to 4, the screw in 2-3 turns Ninja Armidillo, Cam set to 4, screw all the way screwed out. Keywords for Thingiverse's search engine: Prusa i3 MK3s flexion Prusa i3 MK3s flexion Prusa i3MK3s flexion Flexion extruder