Prusa mk4 idler screw size. While hotend is heated to 280° C, firmly grab the filament with the needle-nose pliers that came with the printer. Jan 14, 2024 · I'm having huge difficulties with assembling the MK4 y belt idler (Frame Assembly, step 27). by Joseph Nunemaker. Slowly drag/feed the filament upwards, bit by bit, through the top of the extruder body, until it is completely removed from the PTFE-tube. The only thing is is i forgot to change the Nozzle and bed temp so it was set at Nozzle 210 and Bed 50. , společnosti založené Josefem Průšou, jedním z hlavních vývojářů RepRap. connect. ⬢ Attach the spring 15x5 on both M3x30 screws. For the new generation of printers, Prusa is using special nozzles with an all-metal filament guide. The nextruder nozzles are super easy to change if you print the MK4 Nextruder Nozzle Change Heater Block Clamp and the Nextruder nozzle wrench V2, no need to unplug cables and remove the heat block. Adjust the camera's framing and gently tighten the screw. Unscrew the front part of the Y-axis. 10 comments. 0. The aim is to adjust the nozzle height until the Calibration > Basic calibration. Belt tensioner slim. However, the existing idler would allow only 1-2mm of range for tensioning (I'm thinking about future, if the belt gets significantly looser). On the Nov 28, 2023 · Instead, I decided to use the idler for adjusting belt tension. D. If the extruder does not reach to the heatbed, move the Z-axis down or the X-axis closer. 5S) Selftest failed (MK3/MK3S/MK3S+) Selftest Failed (MK4) Temperature Calibration Invalid FW size on USB #13603 (MK4) #21603 (MK3. Oct 30, 2023 · RE: Clicking sound when printing. ⬢ Make sure the Original Prusa MK4 is selected in the Printer menu on the right, when slicing for the MK4. ⬢ Place the Z motor right (long cable) next to the right Z-bottom. ⬢ Uzavřete jej pomocí Idler-lever-b a zajistěte jej šroubem M3x6. 11 comments. Aug 25, 2023 · The Original Prusa MK4 is built with everyday users in mind. Raise3D E2 Extruder. com/pl Open the Extruder idler door by releasing the screw(s) on the left side of your extruder. MMU2S Disassembly (UPG), 3. com/article/adjusting-b Nov 25, 2023 · RE: Y calibration fails but printing looks fine. Step 11 Installing the Nextruder V6 Nozzle Adapter. Prusa MK4, Prusa XL), filaments (especially our in-house made Prusament), resins, and other accessories for Nov 16, 2023 · I found the issue for my printer! I did 2 cold pull as per the Prusa instruction, than I use a needle the exact same size of my nuzzle (0,4mm needle for a 0,4mm nozzle) and my needle was 3inch (75mm) long to make shure that there is no clogs in the nozzle. Over-tightening can also cause the pulleys to be "choked" by the filament. Using the Allen key, push the nut all the way in. 5, MK3. The MK3S/+ and MK2. 7. The filament can get stuck on geometry on the First Layer Calibration (i3) The First Layer Calibration is used to calibrate the distance between the tip of the nozzle and the print surface. During the first service after 200h, I figured out, that a lot of screws needed tightening. The Idler Nut keeps the Idler, the part that includes the two driven gears, in place. Idler Body Assembly, 5. Worked the very first time on the articulated slug. Well, as a desperate measure, I downgraded the firmware to 5. Draw a line or dot for every few millimeters. Šroub příliš neutahujte. stl (2x) 805 Remove Hot end tube from Prusa by loosening the 2 thumb screws and unscrewing the nozzle using hex tool while holding cool heater block. Too much tension can prevent the motor from turning the idler barrel. The rest can be found on RepRap Wiki. s. 1 mm to 0. In my case the solution was replacing idler-lever-A & B, the idler nut and idler swivel. Plus 1. That is why some G Codes aren't in numerical order. Nextruder Nozzle (choose size above) All-metal high-precision nozzle for the Nextruder combines both nozzle and heatbreak. We're selling Original Prusa 3D printers (incl. You can choose to save money by going the DIY route Invalid FW size on USB #13603 (MK4) #21603 (MK3. MK3S MK2. 9mm diameter x 3. You sure can. It can be as little as 0,05 mm on all axes, after making additional calibrations such as the Extrusion multiplier calibration and Extruder linearity correction. My last day long MMU print was tightened down so you can see 6 or 7 threads past the nut. Advertisement. Fully open the extruder idler. Bear X axis (BearExxa, BearMera, Bondtech on Bear X axis): tensioner is on the right of the X axis (X end idler). MK3 MK2. Place it on the printer as shown in the photos, the base should snugly fit to the x axis idler (right side). 5 mm Allen key as shown in the picture. Move the extruder all the way to the X-end-idler and try the belt tension in the middle of the X-axis. Updated Nov 14, 2023. Self-test passed without any issues, printer prints and I won‘t touch the 5. 9 upgrade despite the webshop saying otherwise. The extruder on the Raise3D E2 is single-geared meaning that the idler is a smooth bearing. Different sizes and types are available, e. Step 12 X-axis: assembling the motor. On the Original Prusa MK2. ⬢ Take the M3nS nut and insert it in the Extruder-body. Jan 19, 2024 · Coming from various user reports, Prusa ships the new MK4 z-rods with the 3. 9 MMU3 MK3. Place the 624 bearing into the idler, and both into the idler holder using a m4x30 screw with nylon lock nut. Tighten the screw just slightly. 2mm quality non-input shaping in Prusa slicer and the temperature is The single thing that makes of breaks a print: How tight the idler door is. Feb 22, 2019 · Did my first ever TPU on the Prusa i3 MK3S, put stick glue down on the plate, modified the PLA settings and used the settings from KLab, and loosened the idler screw back one full turn. Completely the opposite on my Mk3S, forgot to loosen the idler 2 times, but never had any noticable problems. ⬢ Grab two M3x10 screws and screw them slightly in the idler, just to catch the nuts. To replace the part/s, please consult our Assembly Manuals. Introduction, 2. MK3. Original Prusa MK4 と Original Prusa XL には、アイドラーナットに挿入される2つのアイドラースクリューがあります。アイドラーナットは、アイドラー（2つの従動ギアを含む部品）を所定の位置に保持します。ネジの先端をアイドラーナットの前面に合わせ Jan 5, 2024 · Use the M3x18 screw to attach the case to the idler mount, note the camera is effectively mounted upside down. The Original Prusa MK4 and the Original Prusa XL have two idler screws, that are inserted into the Idler Nut. The description is only for Prusa Research-specific G-codes. Insert the front part into the back plate and secure it with the long screw. 120 kB. 9/XL. I can even edit my kit order to add it, though simply editing my order appears to re-calculate shipping and causes a $1. Loosen the two screws on the side of the idler-holder ( purple arrows) by turning them counterclockwise. Step 13 Removing the bearings (new design) ⬢ Remove the two screws from the bearing clip. So I'll stick with online assembly manual. 5) The extruder includes two idler tension screws, to set the correct distance between the drive Original Prusa MK4 kit assembly; 2. Pulley Body May 19, 2022 · After adjusting the idler screw, the results can be seen in the images above. Tighten the screw and ensure the printed part is parallel with the "axis" between the Y-motor and Y-belt-idler. 5. Replace the 20 mm axis with a 17 mm one. XL. Slightly release all the screws holding the motor, otherwise, the "tensioner" won't work as the motor must be able to move (left picture). Often when the MMU2S jams, you have to open the idler up by turning the two spring wrapped screws that hold the idler top to the idler body, then tilt the top back about 90 degrees. Make sure both are all the way in. 5mm wrench to pop it out. February 19, 2021 . Remove the support from the x end. Jul 4, 2023 · Screw in two MK10 threaded bowden fittings; Place the M3 hex nut; Find an M3 socket bolt long enough to just pass through the bracket, and screw it in until it is flush with the other side; Place the bracket in the X-end Idler and tighten the bolt enough to hold it in place (Do not overtighten) . ⬢ Obě ložiska s kolíčky vložte do Idler-lever-a. Several years in the making, the Original Prusa MK4 is finally here. 5 mm Allen keys. ⬢ Using M3x10 screw fix the Y-belt-holder to the Y-carriage. Assembly sinstructions: Gather all parts :) Insert the 3 M3 nuts into the back plate. Find the range that works! 225 C nozzle, 50 C bed, disabling retraction, changing the max speed to 25mm/s while loosening the idler works great for me. On removing the old parts I did notice that the set screw seemed a bit loose so maybe that was the cause of the problem rather than the printed parts. Especially if using an enclosure! TLDR: Enclosure temps of 45-50C were enough for these two assemblies to flex to the point where filament would no longer be held in place tight enough to feed through the Nextruder at all. Reviews are provided by MK4/XL. 4 mm under the edge of the hole on both sides of the idler body. Step 7 Disassembly of the extruder. 4mm brass nozzle, for 1. Step 36 Y-axis: Assembling the belt. ⬢ Take two M3n nuts and Jun 12, 2023 · Original Prusa MK4 Handbook - all you need to know about 3D The standard nozzle for an Original Prusa FFF printer is a 0. 1 again with a 10 foot pole. ⬢ Place the Y motor like in the picture. ⬢ Insert the M3x18 screws and tighten them so that their positions are at the back of the oval hole like in the picture. On the opposite side of the Y-carriage is the nyloc nut on each screw. The MK4 is the latest edition of our flagship 3D printing workhorse. ⬢ Insert the M3nS nut all the way into the part from the side. Visit the Prusa FFF tab in the Wizard, select Original Prusa MK4 in the 0. To find the perfect tension, tighten the screw about 0. I've also made small adapters so that the bigger holes where the PTFE would go also accepts 4mm PTFE tubes. 75mm filament. ⬢ Make sure all three nuts are all the way in. Again, keep this to the side as you’ll be screwing this back in place later. Mk4 petg issues. Slight adjustments MK3S+, MK3. Oct 27, 2023 · March 10, 2024 at 03:23. Secure the idler-holder again by turning the screws on the side clockwise. I'm using a MK3s+ with a clean textured plate. Jul 29, 2023 · I also had this problem fairly severely with my self assembled kit MK4. ⬢ From the side with cables, screw the Nextruder V6 Nozzle Adapter to the heaterblock. ⬢ Do každého ložiska 693 2RS vložte kolíček 2,9x8,5, jak je uvedeno na obrázku. 8 comments. Step 5 Idler nuts assembly. So you need to print all the parts (same as MK4) as described in the table above. Prodáváme 3D tiskárny Original Prusa (včetně Prusa i3), filamenty (zejména náš vlastní Prusament), pryskyřice a další příslušenství pro 3D tisk. You may have to do it a few times to get it right. 9, MK4. You can try completely loosening the tension screws, and allow the MMU to finish the homing. For my MK3 Kit I've bought a torque wrench and applied 0,8 to 1,1 Nm. Mark the filament with a marker. The MK3S+ includes all the proven features Apr 28, 2018 · My thermistor went bad, so I ordered a replacement. There are four large screws holding the part itself and two smaller screws holding the Y-belt idler. The tips of the screws must be aligned with the front surface of the Idler Nut. com/More information about adjusting the belt tension on your MK4: https://help. I’ve tightened the idler spring screws a little and that didn’t help. On the MK4 conversion I switched to hand tightening, after the Y-Axis-Motorholder made some cracking noise (it is still okay) on installation. 5 mm allen key as shown in the picture. The belt tensioner location will vary, depending which X axis you are using. Invalid FW size on USB #13603 (MK4) #21603 (MK3. This is a little more tricky procedure, but it’s one of the best ways how to clean your nozzle properly. Changelog: 16-10-23 / 0. We have upgraded the MK3S with a brand new SuperPINDA probe for improved first layer calibration, added high-quality bearings and various useful design tweaks to make the printer easier to assemble and maintain. Step 5 Extruder-body assembly. I've changed the Prusa's Y idler by extending holes to be able to use longer screws. Contrary to popular belief, in my experience, you can (and should) tighten the bolt more than just flush to the wall/nut as stated in the Prusa KB. Replace the M3 x 30 mm screw with a 25 mm screw. 0 Aug 10, 2018 · Cold pull. Unfortunately, while removing the old one, I stripped the grub screw. The nut doesn't seem to go in all the way, and then the screw can't thread properly or straight (seems to always end up at a slight angle). 9. 5mm Allen keys for this. Had a similar Y-axis clicking noise in my factory-assembled MK4. stl . Apr 8, 2022 · 6. $15. However, please note that the material is Prusa MK4 Heater Cartridge (Hotend Heater) Includes: Heater (1 pcs)M3x4 grub screw (2 pcs) Specifications:Voltage: 24VWattage: 40WLead Length: 120 mm Fits: Prusa MK4 To replace this part, please consult the Prusa Assembly Manuals X END MOTOR-IDLER MK3S+ MK3S MK3 MK2. 5S MK3 MK3S MMU1 MMU2S MK2S MK3S+ MMU3 MK3. ⬢ Insert LM8UU linear bearings into the printed parts (X-end-motor and X-end-idler) as shown in the picture. I’m using . The next-gen extruder (Nextruder) and 32-bit connected platform Feb 4, 2021 · Hi, new Prusa Mini+ owner, but have been printing for a couple of years with a DD. g. Aug 21, 2023 · Belt Tuner App - https://belt. If it passes, then the idler cover is too tight. ⬢ Prepare the motor for X-axis with an assembled pulley. It brings plenty of new features like a perfect smooth first layer thanks to the Loadcell sensor (no manual adjustments needed). According to our testing, the precision tolerance of a well-assembled Original Prusa printer is 0,1 mm on the Z-axis and 0,3 mm on X and Y. Method 2: Pull out filament with pliers. The rubber inside the nut must be facing towards you. Step 6 Installing the Z motors. ⬢ Push the two screws with the springs through the holes in the protrusion on the heatsink. Published Dec 11, 2023. ⬢ Turn the idler to the other side and insert the last M3nN nyloc nut. 6mm, and hardened steel nozzles to print abrasive filaments. 5 - 1. Visible 63 of 140 items. As several people note in the comments, the nut on one side (the face shown in the image) doesn't insert well. ⬢ Release and remove the lower screw. 5 MK2S MMU2S CW1 SL1 SL1S CW1S MK2 MMU2 MMU1 MK4 XL MK3. ⬢ Attach the Idler-swivel assembly on the screws. Repeat the unload filament function to completely unload the filament. Visible 63 of 71 items. 02 in) below the edge of the hole, on both sides of the idler body, and follow these steps: Start by getting out your 1,5 mm and 2. TPU can sometimes print unreliably at low temps, or have a bad surface temperature at high temps. Just ignored it for a couple of days and started to print PA with a hot bed surface Step 19 Mounting the Idler-swivel assembly. Do it manually, no need to turn the printer on. The Original Prusa FFF printers and upgrades use a screw(s) with a spring(s) to provide tension between the filament and the filament pulley. 5 mm (0. ⬢ Remove the bearing clip with the bearing from the Y-carriage. $3. Complete Step-By-Step build guide for the Original Prusa MK4 3D Printer!Full playlist with all MK4 Build parts in the video series!https://www. 75 mm MK2. Make sure to follow the manual for your If the idler springs are over-tightened, it may cause the idler motor to skip. Prusa I3 Build manual – v1. To find the perfect tension, tighten the screw to about 0. Around five prints failed again, after I read here how to calibrate it. Can you take your Prusa MK4 to the next level? Unlock new capabilities with the best Prusa MK4 mods and upgrades around. ⬢ Use the hole on the left, see the picture. A. This means that the entire path of the filament through the Nextruder is all-metal Aug 21, 2023 · Print very slowly - the softer the flex the slower the print or the extruder's interior pressures will be awry. youtube. It seems the "level with plastic" value was way too low for me. 5S extruders have one idler screw. On the Original Prusa MK2S, idler screws should protrude by approximately 13 mm. This can be replaced with virtually any E3D-compatible nozzle, for 1. Neváhejte nás kontaktovat, rádi vám pomůžeme! E-shop společnosti Prusa Research a. ⬢ Push each motor through the Z-bottom and secure it with four M3x10 screws. Eshop by Prusa Research a. Assemble the X motor end and x end like this, using m3x30 screws, m3 nuts and m3 washers. ⬢ Take two M3nS nuts and slide them in the idler all the way in. And yes, I suspect that the minimal grip/idler pressure will be necessary but the Mk4 may not be as sensitive in this. Printing a hotend fan cover for the mk4 with leftover Prusament that came with my mk3-mk4 upgrade and I am getting this weird underextrusion. ⬢ Place the Z motor left (short cable) next to the left Z-bottom. Step 10 X axis belt pre-tension. This will bring the X arm up, correcting a slight skew in this direction. 5, MK2. MMU2S Idler Screw and spring Retainer . The rubber inside nuts must be facing up. z-screw-cover. Use the motor cable as a guide. It is 1 on the Original Prusa MK3S & MK3S+ (left picture) and two on the Original Prusa MK3 (right picture). Retailing at $1099, the MK4 is still a bit of an investment. It combines the reliability and safety features of its predecessors with high-speed performance enabled by Input Shaper support. N. ⬢ Secure the nut using an M3x10 screw. The MMU2S extruder has one screw, but some additional parts. 9) #23603 (MK3. 1. 5S) Selftest failed (MK3/MK3S/MK3S+) Selftest Failed (MK4) Temperature Sep 3, 2021 · Original Prusa MK4: A Fast and Reliable Printer | Now in Stock | Starting at $799! English en. Remove the screw from the bottom of the Z-axis extrusion. Step 16 Preparing Y-belt-idler (part 2) ⬢ Take the Y-belt-idler and insert two M3nN nyloc nuts from the top. Cut the irregularly shaped filament tip obstructing the unload, at a 45-degree angle. I got the V6 adapter, but never used it since it is a pain to install, and a pain to go back to nextruder nozzles. MK4 Camera Mount - X_idler Clip-on - Mounting a C270 camera on the right side of the X-axis. Dec 11, 2023 · The Best Prusa MK4 Mods & Upgrades in 2024. Full system refresh Original Prusa i3; Gearbox alignment (MK4) Idler screw tension; Live adjust Z; Mesh bed leveling; MMU2S Setup and Inspection; Multi-tool manual calibration (XL) Selftest (SL1) Selftest failed (MINI/MINI+) Selftest failed (MK2/S, MK2. 25mm or 0. Feb 22, 2024 · 1 x Belt Idler . 59. ⬢ The motor cables must guide under the frame to the PSU (right) and xBuddy Box (left). 6-alpha - small non functional update, I added a bed model for PrusaSlicer (always used this for my MK3 as well :-)) Step 15 Placing the screws. Nov 26, 2023 · I've upgraded my MK3+ to an MK4. ⬢ Carefully place the extruder on a piece of cloth on the heatbed so that the motor faces down. This product includes: IR filament sensor (1 pcs) The IR filament sensor PCB color may vary (Red, Black, etc. Take a~ 1. , company founded by Josef Prusa, one of the RepRap core developers. Unscrew the top cover of the extruder by removing the 2 bolts which hold it. It is important to have this tension correct. 9mm length. 5 and MK3, the head of the idler screws (2x) should stick out about 0. Krok 6 Sestavení Extruder-idleru. Do not tighten it completely. Oct 4, 2023 · Looks like there is no printed assembly manual this time either - it's online only. ⬢ Place the X-axis on the motor as shown in the picture. Turn the bottom screw on the end clockwise ( bottom blue arrow ). ⬢ From the opposite side of the heaterblock, screw in the V6 nozzle. You will need 3mm and 2. Both hobbed gears can have a build-up of filament shavings stuck in the grooves. Loading filament is a breeze, and we've broken down the whole process to show you just how effor Nov 13, 2023 · Original Prusa MK4: A Fast and Reliable Printer | Now in Stock | Starting at $799! y-belt-idler. Ups925. The MK3, and MK2. 5 mm Allen key. What size is the mk3 thermistor grub screw so I can grab a replacement? I had to use a 1. Insert the Belt, Idler & secure it with the axis. Step 19 Mounting the Idler-swivel assembly. Length of the springs should be circa 13 mm when tightened. Huh, didn't even notice that. by Matthew Mensley, Shawn Frey. Load next 63 items. If you can not unload the filament from the menu after the procedure, loosen the Idler screw on the extruder and Instead, I decided to use the idler for adjusting belt tension. 5) The extruder includes two idler tension screws, to set the correct distance between the drive Nov 14, 2023 · Rating. 5 MK2. ) All properties remain the same the color regardless. 5S MINI MK3S+ MINI+. Resecure the brass fitting and you should be ready to load a new filament. Ensure correct alignment using the Allen key. I was able to get it out, but I do not want to reuse it. prusa3d. 5mm wrench or pliers so that it does not rotate when loosened. The adjustment was slight - just a little bit looser or tighter, equally on both screws. Go to the LCD Menu – Settings – Temperatures – Set nozzle temperature to 215°C and load PLA. ⬢ Take two M3nS nuts and insert them in the Extruder-body. Oct 27, 2023 · Surprisingly, Prusa Research didn’t increase the price for its flagship printer. Prusa MK4, Prusa XL), filaments (especially our in-house made Prusament), resins, and other accessories for 3D printing. DON'T TRY TO PUSH the bearings from the other side. 19. 9 MK4. Tighten the screw just slightly, later on we need to add the P. 5 mm from the extruder on the left side, when the filament is loaded. ⬢ Screw the extruder screws into the extruder body using the 2. Ensure proper alignment using a 1. ⬢ First pair of bearings should be in line with the top surface on both X-ends. ⬢ Insert the M3nS nut into the corresponding openings on the top side of the Y-motor-holder. MMU2S Buffer Disassembly (UPG), 4. 4mm nozzle version (the default nozzle size) and hit Finish to start using the MK4 printer profile. Includes: Nozzle (1 pcs) Fits: MK4. I checked it, but as the manual and the prusa forum said, it was flush with the plastic. sensor. M3x40 screw (s) intersects the extruder horizontally and has a spring on it. There is a rim (smaller diameter of the hole). I don't want to say that you are wrong though. Measurements are showing 2. With exception of M117, they are all shown in order of appearance in the code. 49 additional payment be required. Make sure the nut is all the way in. Selector Assembly, 6. Later on we will need to add the SuperPINDA sensor here. DerMeister7. See the correct orientation of the Idler-nut. Original Prusa MK3 (S) X axis: tensioner Mar 29, 2023 · MK4はMK3S+と同じ寸法なので、 Original Prusa Enclosure を使用いただけます。 MK4でより高度なテクニカルデータをプリントする場合、エンクロージャーはとても便利です。プリンターの環境を安定 させ、隙間風や臭いをなくし、さらに静音化も実現します。 Full system refresh Original Prusa i3; Gearbox alignment (MK4) Idler screw tension; Live adjust Z; Mesh bed leveling; MMU2S Setup and Inspection; Multi-tool manual calibration (XL) Procedure; Selftest (SL1) Selftest failed (MINI/MINI+) Selftest failed (MK2/S, MK2. There are no threads inside. Pla prints perfectly. But guess what. In stock. ⬢ Hold the heaterblock in your hand and tighten the Nextruder V6 Nozzle Adapter by the universal wrench. Loosened the top screw on the mount, adjusted the belt alignment to center it as much as possible, re-tuned the belt tension, and it was almost completely gone. MK4 Filament Guide with Bowden adapter - Adds a central 4mm hole for reverse bowden and some holes for storing filament. Idler screw. This is a list of currently implemented G-Codes in Prusa firmware for i3 series printers. Most of the time, this means that you will need to add a bit more tension to the idler to ensure smooth feeding of the filament, which might also generate Step 10 Installing the Nextruder V6 Nozzle Adapter. Despite being 90% different from its predecessor, not a lot has changed. An update has been posted on Prusa's shipping information page: "Update 8th March: At the beginning of March, we completed the development of the production version of the MMU3 for the MK4, and we shipped the final units to external beta testers for the last round of testing. 17. It is alright to tighten the screws with higher force, we need to induce pressure on the idler. The Original Prusa i3 MK3S+ is the last version of our award-winning MK3 3D printer line. Can you take your Prusa MK4 to the next level? Step 15 Assembling the Y-motor-holder. I. Five or six turns are enough for now. 5S MK2. The clicking I had sounded exactly like the clicking the MK3 makes when the idler screw is too loose or too tight. Step 3 X-axis: inserting linear bearings. Using the 2. 190. ⬢ Hold the extruder in your hand. MK4/MK3. Frame assembly Make sure the engraved PRUSA logo ⬢ Secure the Y-belt-idler with two M3x10 screws. Hold the nut in a 5. 5) Check both grub screws on the Idler Coupler are tightened and that one of the screws is facing After a few days of changing the heat to readjusting the live z-level, I heard the keyword Idler screw tension. 5 MK2S MMU2S CW1 SL1 MINI MINI+ SL1S CW1S MK2 MMU2 MMU1 MK4 XL MK3. 5 mm Allen key, release the spring-tensioned idler-screw (s) completely and open the idler door. If too loose the pulley will not be able to "grab" the filament, while if it is too tight the extruder motor can overexert itself and even start grinding the Jun 7, 2023 · I had infrequent clicking when I first assembled my MK4, but none since I experimented with the idler screws when trying to print TPU. OP should have mentioned the shore hardness of the TPU he plans on printing and so should the other commenters too). Keeping an eye on the filament, tighten the tension screw until the filament is consistently fed into the extruder. ⬢ Take two M3n nuts and insert them in. Prusament PLA is printing fine, and when I switched to Stainsmart TPU, I loosened the idler screw 2 full turns and it's not extruding very well. With the extruder hot, send a G1 command to extrude 50-100mm. MK4 MK3. Ensure correct alignment of the nuts using the Allen key. Verify that your X axis pulley is correctly aligned and not touching the X motor. 5 extruders have two idler screws. 2mm drill bit, grasp with pliers and heat up tip for about 10 seconds over a stove flame or torch. PSA For MK4 owners: Print spares of these idler parts right now. If you tilt the top back too fast, those two spring-wrapped screws go flying out of the idler and bounce away. 0. zvwbqefslihakevzehyp