DIY MMU2S clone

thingiverse

# more info/contact Dedicated facebook group https://www.facebook.com/groups/744982719604122/ # Build your own DIY filament changer Help me to buy new rolls/hardware for testing ;), give me a Tip :) # Update * update 3/3/20 * docs * update 25/2/20 : * documentation 1.0 (see PDF in file section) * update 6/2/20 : * add block support for gear motor with ball bearing, so the 5mm rod is supported by two ball bearing * add case top that allow fixing on 2020 * This thing a little howto for building a DIY MMU2s for a printer with an skr 1.3 board on the printer and a skr mini (or gt2560) in the MMU2s. # What you need to print : ## MMU2S MMU2S ("mmu2s unit" directory ) : https://www.prusa3d.com/downloads/others/MK3orMK25toMMU2S_upgrade_stl.zip ## Extruder Recommended : https://www.thingiverse.com/thing:3626993 or classic MK3s mmu2s (directory "mk3s or mk25s extruder") : https://www.prusa3d.com/downloads/others/MK3orMK25toMMU2S_upgrade_stl.zip ## MMU print upgrade : Ease filament insertion : PTFE insert MMU : https://www.thingiverse.com/thing:3233579 or https://www.thingiverse.com/thing:3657251 Better selector upgrade : https://www.thingiverse.com/thing:3528314 ## Stl available here What I customized and you can download in file section: * MK3-mmu2s IN with PC4-M10 compaticle with 6-in1 splitter * skr mini box for the MMU * MMU support for 2020 * block for gear stepper * block for idler stepper (with inside ball roller) # ASSEMBLY ## Extruder Recommended extruder : https://www.thingiverse.com/thing:3626993 But if you want the orginal extruder : For assembly of the MK3s-mmu2 extruder : https://manual.prusa3d.com/Guide/5.+E-axis+assembly/1055?lang=en https://manual.prusa3d.com/Guide/3B.+MK3S-MK2.5S+-+extruder+upgrade/1070?lang=en Original prusa stl : https://www.prusa3d.com/prusa-i3-printable-parts/ ## MMU2S For assembly of the MMU2s, you can use the official documentation : https://manual.prusa3d.com/c/Original_Prusa_i3_MK3S_to_MMU2S ### Marlin version addon ### Klipper version addon # Wiring the SKR-MINI ## Marlin - 3 drivers (DRV8825, TMC220X, A4988 ...) and configure the jumper to 1/16 to X Y and E0 - X to selector Motor - Y to idler Motor - E0 to gear/extruder motor - Connect PINDA to X MIN - BROWN = +5V - BLUE = GND - BLACK = SIGNAL - Color selector to Z MIN pin - RED = SIGNAL - BLACK = GND - Filament extruder switch ( IR sensor on the extruder) to Z MAX pin - VCC = 5V - S = SIGNAL - G = GND  - Add for wire from the SKR 1.3 (TFT) to the SKR MINI (TFT) - GND = GND - TX = RX - RX = TX - Z MAX Signal = RESET  ## Klipper # Firmware ## Marlin ### SKR MINI Custom firmware for the MMU2 with a skr mini or GT2560 board (replace prusa firmware) : https://github.com/kakou-fr/mmu2s-clone You can/must customize the file **/mmu2-diy/config.h** to indicate the size of your bowden tube #define DIST_MMU_EXTRUDER 690 #define DIST_EXTRUDER_BTGEAR 30 And flash the SKR MINI with this firmware. ### Printer You can use My modified Marlin firmware (with my SKR 1.3 config) : https://github.com/kakou-fr/Marlin Or use the last version of Marlin 2.0 bugfix For the Marlin configuration, see the file **MMU2S-clone-guide_v0.1.pdf** ## Klipper Install the last version of klipper (https://www.klipper3d.org/Installation.html) The MMU2S configuration is in the file : [https://github.com/KevinOConnor/klipper/blob/master/config/sample-mmu2s-diy.cfg](https://github.com/KevinOConnor/klipper/blob/master/config/sample-mmu2s-diy.cfg) you can include this file in your printer.cfg by adding (at the end of the printer.cfg) : [include klipper/config/sample-mmu2s-diy.cfg] Modify the parameter in the section **PARAMETER TO ADAPT TO YOUR SETUP** to match your setup # Howto to use it ASAP ## Marlin version ## Klipper version # BOM for screw, refer to prusa assembly guide (and buffer guide), you need a lot of M3/M2 screw * other : * PTFE 3x4mm (filament roll <-> buffer <-> mmu <-> extruder, i used 7 meter) https://www.aliexpress.com/item/1M-PTFE-Tube-Clear-Teflon-PiPe-to-J-head-hotend-RepRap-Rostock-Bowden-Extruder-Throat-For/32535510253.html?spm=a2g0s.9042311.0.0.27426c374OHBk7 * PTFE fit (PC4-M6 x5 (mmu in)) https://www.aliexpress.com/item/Pneumatic-Connectors-Bowden-Extruder-J-head-Hotend-for-OD-4mm-or-6mm-PTFE-Tube-Quick-Coupler/32809884127.html?spm=a2g0s.9042311.0.0.27426c37G5AlWi * PTFE fit (PC4-M10 x12(buffer x10, mmu out, mk3s in)) https://www.aliexpress.com/item/Pneumatic-Connectors-Bowden-Extruder-J-head-Hotend-for-OD-4mm-or-6mm-PTFE-Tube-Quick-Coupler/32809884127.html?spm=a2g0s.9042311.0.0.27426c37G5AlWi * mk3s extruder * 24V blower (5015 turbo) : https://www.aliexpress.com/item/5015-4010-4020-12V-24V-Cooling-Turbo-Fan-Brushless-3D-Printer-Parts-2Pin-For-Extruder-DC/32874940278.html?spm=a2g0s.9042311.0.0.27426c373ckTlm * 24V fan (4010) : https://www.aliexpress.com/item/5015-4010-4020-12V-24V-Cooling-Turbo-Fan-Brushless-3D-Printer-Parts-2Pin-For-Extruder-DC/32874940278.html?spm=a2g0s.9042311.0.0.27426c373ckTlm * hotend 24v Ptfe inside : https://www.aliexpress.com/item/Trianglelab-Highall-metal-v6-hotend-12V-24V-remote-Bowen-print-J-head-Hotend-and-cooling-fan/32844028127.html?spm=a2g0s.9042311.0.0.27426c37BKNwat * btech clone gear https://www.aliexpress.com/item/1Set-Cloned-Btech-Dual-Gears-DIY-Prusa-i3-Steel-Pulleys-Kit-3D-Printer-Gears-Extrusion-Wheel/32885613357.html?spm=a2g0s.9042311.0.0.27426c37nC13mZ * filament sensor IR https://www.aliexpress.com/item/Mk2-5-Mk3-To-Mk2-5s-Mk3s-Latest-3D-IR-Filament-Sensor-Upgrade-Detect-Stuck-Filament/32976750770.html?spm=a2g0s.9042311.0.0.27426c37nC13mZ * MMU2S * stepper (1.7A x3) : https://www.amazon.fr/gp/product/B06Y4NYJWN/ * spring 15mm (2 for mmu, 1 for mk3s) : https://www.aliexpress.com/item/20pcs-compression-spring-wire-diameter-0-5mm-outer-diameter-4mm-Stainless-Steel-Micro-Small-Compression-spring/33021741010.html?spm=a2g0s.9042311.0.0.27426c37nC13mZ * coupler 5x5 (1) and 5mm x 8mm (1) https://www.aliexpress.com/item/Kande-Bearings-1pc-5x5-5x8-8x8-3D-Printer-Accessories-Aluminum-Couplings-Ship-Model-Couplings-5-5/32869281876.html?spm=a2g0s.9042311.0.0.27426c37nC13mZ * skr mini (1 for mmu) https://www.aliexpress.com/item/BIGTREETECH-SKR-mini-V1-1-32-Bit-Control-Board-ARM-CPU-32Bit-3D-Printer-Parts-TMC2130/33011542798.html?spm=a2g0s.9042311.0.0.27426c37nC13mZ * Clone gear (the one I use) https://www.aliexpress.com/item/5pcs-Filament-Gear-Motor-Gear-Filament-Pulley-For-Prusa-i3-MK2-MK2-5-MK3-Multi-Materials/32956124800.html?spm=a2g0s.9042311.0.0.27426c37nC13mZ * or Gear MK8 ( MK8 D) x5 https://www.aliexpress.com/item/MK7-MK8-Extruder-Drive-Gear-Bore-26-36-40-teeth-5-8mm-For-1-75-3/33001874597.html?spm=a2g0s.9042311.0.0.27426c37DT28yh * rod 150mmx5mm (need to cut to the correct size with something like a dremel, 5x 16mm) https://www.aliexpress.com/item/RC-Stainless-Steel-Rod-shaft-Linear-Rail-Round-Shaft-Length150mm-Diameter-3mm-2mm-2-5mm-4mm/32297671032.html?spm=a2g0s.9042311.0.0.27426c37G5AlWi * leadscreww 150mm (you can cut it to correct size or not :)) https://www.aliexpress.com/item/Lead-Screw-100mm-150mm-250mm-300mm-330mm-350mm-3D-Printers-Parts-8mm-Trapezoidal-Screws-Copper-Nuts/32971570416.html?spm=a2g0s.9042311.0.0.27426c37G5AlWi * mk3 nut (x1) https://fr.aliexpress.com/item/33018853818.html?spm=a2g0o.productlist.0.0.544d2e03n3ofMM&algo_pvid=1e8fb152-a8d6-4823-aa17-39026c9744f6&algo_expid=1e8fb152-a8d6-4823-aa17-39026c9744f6-26&btsid=0ab6d69515901652892204460e9c70&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_ * pinda (x1) https://www.aliexpress.com/item/Prusa-i3-mk2-mk2s-F-I-N-D-A-Probe-Compatiable-With-mini-rambo-For-DIY/32909754101.html?spm=a2g0s.9042311.0.0.27426c37OzLD9y * rod and laiton tube https://www.aliexpress.com/item/1-Set-Prusa-i3-MK3-Multi-Materials-2-0-Aluminum-120mm-Smooth-Rods-And-Brass-Tube/32956496462.html?spm=a2g0s.9042311.0.0.27426c37OzLD9y * metal ball for pinda (7mm) https://www.aliexpress.com/item/10PCS-Pack-Durable-Bicycle-Stainless-Steel-Ball-Replacement-Parts-2mm-3mm-4-763mm-5mm-6mm-7mm/32965688089.html?spm=a2g0s.9042311.0.0.27426c37EssjEm * ptfe capricorn clone 1m (inside the mmu, you need to cut small part and drill the in) https://fr.aliexpress.com/item/32889180926.html?spm=a2g0o.productlist.0.0.6ae726a5l2HjaF&algo_pvid=5320d311-e6ed-491d-959b-b89e051e53d6&algo_expid=5320d311-e6ed-491d-959b-b89e051e53d6-9&btsid=24dc803f-a53a-459e-9c8e-f489c849b701&ws_ab_test=searchweb0_0,searchweb201602_6,searchweb201603_55 * bearings : 625-ZZ bearings (x10) * What i use in my printer * LV8729 extruder driver (1) https://www.aliexpress.com/item/LV8729-stepper-motor-driver-4-layer-substrate-ultra-quiet-driver-LV8729-driver-support-6V-36V-full/32812173457.html?spm=a2g0s.9042311.0.0.27426c37nC13mZ * tmc2209 (x/y) https://www.aliexpress.com/item/Pre-Sale-BIGTREETECH-TMC2209-V1-1-UART-Stepper-Motor-Driver-Stepsticks-Mute-Driver-VS-TMC2208-TMC2130/33028054557.html?spm=a2g0s.9042311.0.0.27426c37OzLD9y * skr 1.3 https://www.aliexpress.com/item/BIGTREETECH-SKR-V1-3-Control-Board-32-Bit-ARM-CPU-32bit-Board-Smoothieboard-3D-Printer-Parts/32980090169.html?spm=a2g0s.9042311.0.0.27426c37HDT5ir