Settings -> Move Axis -> Extruder. add a second filament in tab. then select 'Add Custom G-code' as shown above and then. Search for "Layer" and find the layer you want to stop at. Another option is to cut the print in two and only print the lower part, I use this to make smaller test prints Jun 16, 2018 · when you wish to continue, insert the filament into the extruder, press the button to load the filament, the extruder will reheat, grip the waste pile with pliers, but don't pull it off, when asked if the colour is clear, click yes, and wait a few seconds and the print should continue, pulling the waste off the extruder! regards joan Jul 1, 2022 · Purging the configured amount of filament so that the old filament is completely cleared from the nozzle. Apr 30, 2020 · This video was created to show how to create multicolored 3D prints using the Prusa slicer manual filament change function. With Cura, filament change operations and mid-print insertions are easy. and again after 5 minutes Nov 15, 2022 · First go into the Settings. 1 will support filament overrides of extruder retract parameters. All Prusa Slicer is doing when you insert a colour change is adding in the Gcode command defined in Printer Settings>Custom Gcode>Color Change G-code. Step 3: When pushing the filament to the printed head position, press select GCODE Scripts in the left hand column enter M601 ; pause the print in the After print job is paused text box. This option could be used to end the print. 1 on macOS 11) has a filament change at least at the beginning of the print. In this step, you have to make the settings for the script. Recently my prints are randomly stopping and forcing a filament change. If you want to pause your printer to swap filament, the G04 command can enable that. Observating the X1C after the Color-Change with AMS I see moving the printhead kind of "all around" witch may be his x-y-calibration. The code optimizes movement as well as printing a purge line similar to when the print starts (the same, but offset). I have tried a lot of settings but nothing has changed this delay. On the Cura slicer there is the option of how much filament you would like to extrude. 7. Custom wipe tower. Find out how to use the Cura See full list on blog. M600 ; execute filament change. If it isn’t working, you can reset the field content by pressing the little orange arrow. PrusaSlicer is optimised and has features for Prusa printers. use a text editor (i use notepad++) to edit the GCode file you want to print. Once - this level is similar to Loud, but all beeps are played only once. Mar 9, 2024 · The pause at layer height pauses the printhead on top of the print so I can not change the filament. M25 ; This makes the printer pause, then the pause button on the screen turned into a play button to hit after you finish the filament swap. 5S MK3 MK3S MMU1 MMU2S CW1 MINI MK2S MINI+ XL MK4 MMU3 MK3. Filaments. select the Save button at the bottom of OctoPrint Settings. Insert M600 Z30. The documentation seems to imply that purge volumes can be adjusted independently for any combination of filament changes, but that doesn't seem to be how it works. The basic procedure will move the print head away from the print, eject the filament, wait for new filament to be inserted and the user to confirm, load Feb 5, 2021 · So my question is, is it possible to insert a changing filament (M600) in the middle of printing layer with prusa slicer ? In PrusaSlicer, is it possible to detect the moving of the extruder where the word will be print and insert M600 and after detect the moving towards the drawing and insert the M600. Q: PrusaSlicer won't start on Ubuntu. jpg. What I do is this: Create a baseline profile (e. I've had prints with 1800 of these. Result: M600 Deleted your part from your file, added a box, and same as above. The GCODE for the “After print job is paused” will move the print head away from the work to allow you to change the filament without upsetting the work on the Mar 24, 2024 · Hi All, I am using Ender 3 S1 pro and prusa slicer. Dec 28, 2022 · 3- Add a “Pause at layer” where color change is needed. slice and select the layer you want to change filament/color. Mar 31, 2020 · RE: Pause Print At Specified Layer Not Working. Right-click (Advanced mode) on a model and pick either: Infill Layers PrusaSlicer > Advanced features. From Prusa's website: ---. 5S MK3 MK3S MMU1 MMU2S MINI MK2S MK3S+ MINI+. We can have a "pause" button for M601 beside the "+" button for M600. Half the time it just seems to skip right past the pause. when using the colour change by layer height feature instead of using the left mouse button to insert an M600 command, use the right mouse button. I have tried this with multiple prints and get the same result. You can also simply press a number key, e. Sep 25, 2023 · Add a stl. May 7, 2023 · ; MANUAL_PAUSE_CODE_INSERTED M400 U1 Now You paint your model in the slicer and print it directly. You will need to add “ [pause_resume]” in the Printer Settings. e. 5- Print. 5 MK2. Its behavior is identical to the preview in PrusaSlicer (the same code is used), however, you can load an external G-code file. Rather than causing a wait until the temperature stabilizes, the wait will complete as soon as the temperature target is exceeded. In PrusaSlicer you slice the object then slide the slider do the layer you want to change filament on and click the little right arrow on the slider. Alternatively, you can select a part in the object list, right-click on it in the 3D view and select Change extruder - Extruder [number] from Jun 11, 2021 · I have no idea what's wrong, I tested the following with your file Changed printer to all prusa presets I have installed, plus some of my own, changed print and filament. You should try Prusaslicer. Mar 11, 2024 · I finally found a solution and a great video showing how to use Orca slicer to do a filament change on Tube: Worked great and I thought I would share it for other newbies like me. This can be used to print basic multicolored models. See #1355 for further details. Unfortunately, there somehow seems to be a little "loop" of the new extruded plastic hanging by the time the next (final) layer is started, causing some visible quality issues. 6- When the printer pauses, from printer control panel, close the “Pause” dialog then unload old color and load new color. 9 MK3. 0, but I added a dummy object to handle filament blobs, etc. If you operate Snapmaker using a USB stick, you can use the prusa slicer color change function perfectly. Sometimes the wipetower can use more filament than the thing you print. Enter the correct layer numer here. g. Press resume in octoprint to continue the print. @TeeBell. And that's all I had to do. It is easy as going to the LCD and going to tune change filament. Result: M600 Exported your part as stl, opened a fresh Prusaslicer, drag your stl to build plate. I found the same problem in a youtube video (different slicer) and there Dec 17, 2019 · RE: Change filament for infill. Jan 15, 2021 · The printer does not retract the filament for some travel moves result in scrape printing part as shown in picture. Sep 12, 2023 · Press and hold the quick connector handle at the interface of the print head filament tube, and pull out the remaining filament. 1252×787 20. When I activate "Prime all printing extruders" it prints the first material, it doesn't print the prime tower, but it makes a Pause for color change. as I have both - a P1P without AMS and a X1C-Combo with AMS - I tried to change color at layerhights with my P1P and came up to the same problems. If it works, the print should be paused everytime a filament change is required and you can manually change the filament. Sep 17, 2020 · In IdeaMaker, click on the “Play” icon, then click on the setting icon to open printer settings. Putting the gcode on a card instead of sending it via OctoPrint won't change that. Purging volumes (MMU) During a filament change, a small amount of melted plastic remains in the nozzle. 0. Plus 1. It will move every 5s by 1,1 (total time 45s). I change my filament color and clik resume print. Step 2: Reconnect the filament tubing. You should be able to use M25 instead of M0 for a pause, though. The printer paused on the specified layer but stayed on top of the print so I could not change the filament. Next is to go into the GCODE Scripts. Just type in the Start G-code box to add. Jul 14, 2021 · For example M109 S{(first_layer_temperature[0])+ (10)} ; wait for extruder temp - would set the temp to whatever the filament is configured for +10 degrees. By default the PrusaSlicer insert a M600 command for change the color of filament. After 30 minutes, the printer bip and tell me to change the filament. The wipe tower size can be reduced by skipping the sparse layers (layers without a tool change). Updated Apr 6, 2024. However, if you have Marlin-based firmware, you’re probably better off using the M600 command, although you’ll have to enable advanced pauses first. This is my printer setting. Feb 14, 2020 · Doing color change in PrusaSlicer (PS) that change M600 to something else (M0) cannot be done directly. Jan 31, 2021 · pause for filament change does not appear. This is your moment to hit PAUSE button on printer screen and change the filament (it is possible after pausing the print). Aug 14, 2018 · It would be great to have M601 - Long pause for inserting magnets or whatever. To make the change manually, open the gcode file in a good text editor (I use Notepad++) and find the layer where you want the change, add the gcode for the changes into the file in the 'After layer change' section. Orca is ish for color change. For example, if I'm doing a 4 color print with black, green, white and red. I have done it frequently. If I want to purge 20mm extra white when printing white following the black Jun 18, 2018 · pauzing print for filament-change in Slic3R. In this case, color-changes (manual filament swaps) can be added, but not extruder-changes. Modifying G-code file. When you start print your complete model set a reminder after 4h15 and wait near the printer for the change. This video shows a use case. Manually set nozzle temp. I've tried using just a M600, but still Apr 6, 2024 · PrusaSlicer Expert Settings: Simply Explained. If you're changing filament by hand you can run the extruder (E-Axis) forward a few mm. A: This may be due to missing package. 4- Slice. Log in to be able to post. Or you try the 2. M300. For a filament swap, it’s important to get an idea of how long swapping filament takes you. by Pranav Gharge, Myles Vendel. This saves material and in almost all cases reduces the print time. 3. With this script you can use your favorite filament profiles for generating multi color objects. Edit : I missed the obvious one - select the appropriate filament for each extruder. I have also tried the M600 color change command. Has anyone used a pause function with success? I would like it to pause, move the print head out of the way and resume the print by manually restarting it at the start of the desired layer. Wipe tower without sparse layers. and re slice the model. G1 E-5 F300. enter G4 P5000 ; Dwell in the Before print job is resumed as the second line in the text box. Apr 27, 2023 · M600 (Filament Change) The primary purpose of the M600 G-code command is to initiate a filament change, which, alongside a pause, includes actions such as parking the printhead away from the print, ejecting the filament, and loading & priming the filament once you have confirmed that you have inserted the new spool. In order to ensure a sharp color transition, PrusaSlicer PrusaSlicer supports the following scenarios: Single material printer (or MMU2 in Single extruder mode). This is ok for single May 30, 2021 · Everything I slice (PrusaSlicer 2. Dec 28, 2020 · RE: Setting for adjusting the Z-height lift on "pause" and "stop" I'm misunderstanding what you wanted, I thought you wanted to add a g-code that would position the extruder where you wanted it during a M600, after reading again It looks as though you want it to happen from the terminal when you select Pause from the LCD screen, in the marlin menu. Jun 9, 2023 · Manual swap without pause. After 10 minutes again, bip again to change filament. The slicer puts the color change command into the layer change block, meaning it is after the last move from previous color, but before the first move from the new color, meaning the head did not yet move to the part of the model that should have the new color. The printer automatically pauses the print as soon as it PrusaSlicer > Advanced features. Creality dit not implemented this in Ender3, but can be enabled Creality firmware doesn't support the optional M600 filament change, nor even the standard M0 pause command, and doesn't include the options needed for filament runout detection either. prusa3d. I tried the add pause print (M25; pause print). You can assign a color (extruder) to a part by double-clicking on the colored rectangle in the Object list. I tried the same in cura and it does work, the printhead moves away from the print and I can change the filament. Layer: Here you determine the layer at which the new filament is to be used. With just the @pause command, the problem is that the hot nozzle stays in place and melts whatever area of the print it's at. Oct 22, 2020 · While that is still a very useful source of info for beginners, advanced users might want something more elaborate. I know this is very easy in PrusaCOntrol, i've used it allready but looking for the same procedure in Slic3R. On the Printer Settings | General tab change the number of extruders to 2. MK2. However if a pause or filament change is needed mid layer print this is a manual gcode edit. For example, with different infill or layer height. The color change command moves the printhead on the edge, it is extruding filament and then it resumes the print without having the time to swap filament. We currently parse, and up to some level interpret, G-code from PrusaSlicer, Slic3r, Slic3r After that i have launched a print for 6 hours with PLA color Rose. The intetnion is to be able to add gcode edits in the slicer opposed to the gcode editor and trawling through the relevant line and manually editiing with Jun 16, 2019 · RE: How do I set an auto pause during print to change filament. Easily set your printer to pause and request a filament change at specific points in your print so that you can print with multiple colours with one extruder How to use the Pause at Height script easily in Cura to stop your print and move the head allowing for a leisurely change of filament. There are 4 options: Loud, Once, Silent and Assist. Nov 28, 2021 · In PrusaSlicer it is possible to insert g-code at a specific layer for change color, pause or custom g-code. Hmm - neither could I. 2. I don't like cura though and all my settings are on the Prusa slicer. I have the Prusa i3 MK3 and use PrusaSlicer 2. We believe that's all that is needed to be overridden from the Printer profile with the filament profile, now we are adapting our profiles to that change and we are discussing internally, which of the Print parameter should we allow to be overwritten by Jun 24, 2019 · First off, I am just a user like you. Find out how to use the Cura pause at height feature! Advertisement. For example, I just sliced and printed a simple string test -- 2 columns near each other. The color change command moves the printhead Jan 25, 2022 · It does seem to be more advanced. Then the settings you have for simple, advanced, and expert are color coded May 13, 2021 · Pause at height. "3" to assign the extruder to the selected model. May 14, 2024 · Cura: Pause at Height – Simply Explained. Apr 24, 2023 · Using Creality Slicer. 9. Klipper will still ignore the M0 command but the script will then run the PAUSE command, allowing you to do your filament change. Using a fake MMU profile (increase the number of nobbles and set the filament change gcode as custom tool change gcode (m602 iirc)) and enabling the wipe tower is how I do colour changes on the mini and mk3 without MMU Sep 1, 2011 · PrusaSlicer is based on the pioneering work of Alessandro Ranelucci and the RepRap community on the Slic3r project. G1 X### Y### F2400 (insert somewhere not above the print) M300 ;This makes the printer beep loudly. This is done in the preview at the layer scale to the right of the preview. There should be a pause to change filament, just like when color change. G1 E0. here is the video so you have a better idea. The most important setting is of course the layer count at which the new filament should be printed. 4 F1500. Aug 7, 2022 · here is how to invoke an automaitc filament change at specific layers. Second, Settings in the slicer are kind of set up like this: Use the 3 basic settings on the side until you get comfortable with your project, namely Print settings, Filaments, and printer. Tell you to change filament. Has this happened to someone else? If so, how did you make it appear again? Thanks in advance, Josué PrusaSlicer lets you schedule a filament change at a certain layer. Let us introduce our material table that allows you to compare the basic parameters of different filament The code then does some prep and clean up around a M600 command (manual filament change). I want to do a filament change mid-print. Jul 18, 2019 · The upcoming PrusaSlicer 2. 62. You must be in Expert mode to see these settings. Scroll down to find the sections titled, “After print job is paused” and “Before print Job is resumed. This results in a big blob followed by under extrusion. In the next PS release (current alpha) it is possible to insert May 9, 2019 · When the change is done it adds the skirt and this then makes a mess of the print. , a baseline profile for each printer, a baseline profile for filament types, a baseline profile for print settings). For a normal temp tower the change needed is tied to height of the model you are using. Filament Swaps. The 3D printers are no more a rarity, ABS is not the only filament, motion systems are accurate and extruders are no more Oct 17, 2018 · RE: G-Code for filament retraction. thx for the help. M600 as Custom G-code for tool change. Manual Filament Swap. Recently I found that the "pause to filament change" + sign does not appear. "Previous implementations of color change for multi-tool printers left picking the right tool on the firmware and user. I don't think that's my problem. Like, going from PLA to ABS wont work as the temps and materials are quite different. (it was not planified) OK, i change for a first time, i put again the same filament and the print continue. To set the change position: M600 X10 Y15 Z5 ; Do filament change at X:10, Y:15 and Z:+5 from current. ”. Jun 3, 2019 · New features have made pausing a breeze in ideamaker Oct 20, 2021 · Slicer version 3. 0 and haven't found the pause function (M601) to work reliably. enter M602 ; resume the print in the Before print job is resumed text box. Pull off the extruded plastic, then roll back the extruder. I can still pause, stop and resume the print but the "Unload" option no longer appears. 6 KB. In this case of color change the properties of the different filaments aren't considered. I also re enabled the filament sensor. Inspect Gcode and find M600 and T0 in the beginning after the Start Print macro call out. Posted : 18/09/2022 9:17 pm. The S parameter for the M109 and M190 commands is altered to behave as it does in Marlin. I believe it is a slicer issue, I see the same on my MK3 color changes. 13. export gcode to your computer and open with text editor. Then just click the Resume print button on the web interface to continue printing. After adding [pause-resume] you need to edit the 'Pause at Height" post processing script. Print settings | Multiple extruders tab - select Extruder 2 as Infill extruder. save the modified Gcode. I thought it could be related to the filament sensor, but given it doesn't Nov 28, 2023 · RE: MMU3 beeps on each colour change since Prusaslicer 2. The print will pause at the layer and move the print head to x0 y0. That does pause the print, and I can resume it through octoprint's web UI. The printer you shouldn't have to change. Multi-material printer with the same extruder Jun 15, 2023 · RE: Colour change leaves extra dot of filement on your object. The only problem is that the results are not as good as what I got with the USB stick route and the filament change command. Nov 19, 2023 · Hey all! I'm experiencing requests for filament changes with every print. 5. I used to be able to pause the print to change filament or to insert a nut. When you resume printing, the movement to 0,0 (left front corner of the plate) will PrusaSlicer G-Code Viewer. by Jackson Moody, Matteo Parenti, Josiah Guthrie. Nov 21, 2020 · RE: Prints randomly force a filament change mid-print. M109 S195 ; set nozzle temp to 195 and wait to reach it before continuing Mar 30, 2022 · I like to make changes to print, filament, and printer settings across 3 different printers, each with varying nozzle sizes and filaments. Apr 7, 2020 · In PrusaSlicer I use the custom g-code at layer feature to insert @pause. You can have a series of those that change it at different points. 0 using PrusaSlicer 2. Previously, I used to use cura’s “pause at height” extension only to change color in snapmaker 2. Jan 27, 2023 · Pause of print and filament change is triggered at layer change and can be added in prisaslicer. the normal Klipper behavior for S). Step 4: Adjust the Script Settings. PrusaSlicer is powerful slicing software with a long list of expert-level settings. 75 mm MK2. Mar 14, 2022 · If you set color change in prusa, M600 G-code is automatically inserted. It seems to have started after disconnecting my MMU2, but not sure 100% on that timing. And when it does work OctoPrint doesnt send a push notification to my phone so I have to set a timer for when the pause should occur. Normally this is defined as a M600. With PrusaSlicer, you can print multiple models at once, each with slightly different settings. May 16, 2020 · Have never tried it, but I would setup PrusaSlicer to use 2 extruders and tell that the printer only has a single extruder: Each extruder can have different material. A: The GRBL project overloaded the term "jerk" to define maximum instantaneous velocity change, which is easier to be implemented by 8bit controllers, and most of today's 3D printer firmware is based on the GRBL planner. I also tried the color change in the past but there is not enough time to change the filament, at least on the Ender 3 S1pro. I did also back off the extruder tension to where the screw is 1 thread past the nut. Attached is the gcode I read from Cura. Not sure which part be the problem. During this time, you’ll see a gradual change in the color of the extruded filament. Run extruder in reverse to release filament. re slice. I haven tried the alpha so can't give you any tips. Where to check and what could be the problem? Aug 22, 2023 · RE: Problem with resuming after colour change. Read on to learn how to get the best out of your prints! This parameter will cause a wait until the target temperature stabilizes (i. 4 KB. Machine Settings 03. keep finding and will encounter a second M600 and T1 in the correct layer. The M600 command initiates the filament change procedure. As the new filament is loaded, it’s melted as well and starts pushing the nozzle content out. Jun 12, 2023 · Hi, i have a new problem with the slicer: as of late, the printer decides to "pause" the print for a couple of seconds after each layer is finished. I also tried the custom gcode a find on this forum which tells the printer to pause and move away from the print however this does not work on the S1 pro because you can not continue the print after pause. That’s it and then when printing it will stop at that layer, move the printhead off the print. In this section, navigate to the Advanced tab and add M600 to the Pause at Height GCode. If you have a Bambu it is dead easy but if you you need to fiddle a bit. Silent - most of the beeps are muted, the user is Placing the box to the top and right of your model makes it get printed first after the filament change. Just make sure to use a retraction that works Jan 8, 2023 · Currently the ONLY way we are able to do this is by: Set a pause at layer in slicer When the printer pauses and parks the head over the poop-chute you squeeze the filament cutter and cut the filament. The process is wasteful in that the printer has to maintain a wipe tower from the plate up to the point of the last filament change. If I don't activate "Prime all printing extruders" it works fine. Dec 19, 2022 · I tried the PrusaSlicer filament change G-code: M600. The only catch is the filaments need to be like in temps and printing settings. This Python script allows a 'real' filament change in PrusaSlicer. Sep 27, 2021 · the issue apply to multi color printing on a single nozzle, through manual filament change while print is in pause. Does someone can explain me how to program a pause at a specific layer in PrusaSlicer ? In Cura I can do it easyly, asking to pause at a choosen layer, travel to 0 X 0Y and keep noozke at 210 degrees. Is there a way to implement a or some pauze(s) to change filament in Slic3R. You can add them but when the wizard is done most of them will only show up if you also have a Prusa printer selected under printer. When AM5 will hit color change layer, the print head will go to left and to the front. This will instruct the slicer to insert the M600 command in your sliced G-code to stop the print and allow the filament change. Sometimes PrusaControl is just too basic. I prefer the detailed control in Slic3R. No need to add a filament change command. Mar 12, 2018 · You can certainly change filaments while printing. A lightweight application, which you can use to quickly preview G-codes from all popular slicers. If you insert color change M600 via PS, it is possible to run a post script after gcode generation to change M600 to something else, but you have to write the script yourself. Printer settings | Custiom G-code tab set tool change g-code to M600. com Aug 10, 2023 · The printer is also extruding a lot of filament. 1. If I pause the P1P, this is not happening after filament-change, so It's the visualization of the final extruder ramming before it unloads the last used filament (in order to create a sharp tip). We would like to show you a description here but the site won’t allow us. That’s why we’ve prepared the advanced filament guide that summarizes all supported filament types found in PrusaSlicer. 3 release I have just tried turning my beeps on again and it is still beeping on every tool (filament) change - I will be turning it off again and wait for the solution. Sep 7, 2022 · RE: Unespected filament change. Feb 18, 2024 · You can change filament with the M600 command in prusa slicer but it works only for the tool 1. Adding a pause from Slic3r PE in the same way as color change would be great. Print first part with extruder 1 (PETG) and second part with extruder 2 (TPU). I'm using a prusa I3 MK3S. Dec 25, 2017 · Lets say you have 12h print and at layer 700 you need a change, cut the model in two and slice the 1st part, this should give you an estimated print time (PrusaControl is quite close to the real time), lets say 4h30. The most popular way to change filament mid-print is by doing a manual filament swap by pausing the print and changing filament. For that reason the print needs to be limited to the right half of the print bed. ) I'm using a non-IDEX dual extruder machine (T0 and T1 tools, RepRap Firmware on Duet board), and I mainly use the second extruder, the T1 one, so in the Start Gcode Script I use "T1" as first command. On the off chance it was fixed in the 3. I din't find any info on that in help menu! Aug 5, 2019 · Go to the Custom G-code sub-tab of the Printer Settings tab and set the Tool change G-code to the following G-code: M600; Filament change. I want my printer to retract the filament as I have set it to. Loud - printer uses acoustic signalization to notify the users of a failure, filament change during a print, or if confirmation is needed. I was able to reprint the part with the door open on the enclosure. Aug 11, 2023 · RE: Extruder height on filament change. I'm doing a dual color print, with 2 stl objects. This video also discusses how to . On firmware 3. Filament change or advanced pause feature is implemented by default on all Prusa printers. On the Ender 3 you can easily find the “Pause Print” option after Dec 17, 2019 · RE: Use different filament settings. In Preview tab, use slider to observe filament change at appropriate layer. Jul 24, 2020 · In PrusaSlicer go to Configuration - Configuration Wizard and you can add all the filaments you want. 2. Updated May 14, 2024. 70 update. As already mentioned above, the project was started ten years ago and a lot has changed since then indeed. Jan 20, 2020 · Hello, 3D Printing friends! Today we're going to learn how to program filament swaps in PrusaSlicer, so you can change filament colors or materials at certai Jul 6, 2020 · In PrusaSlicer I use the "custom g-code" at-layer feature to insert @pause. Pull out old filament and load in new filament. CatEye. The only way I can do this is to slice the stops before starting the print. First you’ll need to pause the print by using your printer’s menu. Creality Slicer Printer Settings 01 1047×788 59. Take out the new filament, pass the filament through the filament sensor and then into the filament tube. This will tell the In the "Pause at height" script settings, just enter "PAUSE" in the "G-code After Pause" text field. Describe how it would work Add option to inject m600, g04, pause or filament change during slicing so that manual gcode edit is not needed. 2 alpha2 which changes the behavior of the m600 command. If you are going to change the filament or change color at a certain level, it is preferable to use the Color change function found in the latest version of PrusaSlicer. It's not totally random, but seems to happen between layers even though I haven't added any color changes. After the filament change, I pull away any excess material. The printer (Ender5 Pro) warmed up, probed the BLTouch as normal, and printed the initial line down the left hand side of the board. mh tu ps fr zv cw uu cz xm av