Klipper Config shared_heater Deprecated

25 thoughts on “Klipper Config shared_heater Deprecated”

1. Hello , First off I want to thank you for posting this information . I am running a custom build with a 2 in 1 out extruder setup . I have been trying for days to get my config file working . I copy and pasted your code and it instantly started working . Well almost . I can manually control each of the extruders just fine but when I run a program I get an error that says “Extruder Not Configured ” . im not sure if there is an issue with the config file or if it is the gcode coming from the slicer . i was wondering if you would be will to take a look at my config file and see if something stands out to you .

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   1. Hey there, glad I could be somewhat helpful! I wish I saw your comment sooner (apparently I never setup email notifications for this website, doh!).

      Anyway, if you’re still having troubles with this, I would look at the gcode to see what tool the slicer is telling the printer to use. Usually that’s a “T0” or “T1” command. This needs to correspond with the tool change gcode macros that should be defined in your config — otherwise klipper won’t know what tool the gcode is referring to.

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      1. Hi, I used your configuration for a Multiextruder 3-D Printer on my Ender 3 with 3 extruders and the btt octopus v1.1 but I have a problem if I want to Slice Something with Orca slicer that I want to Print with tool one and two the printer starts correct with Printing the first layer of the Purge Tower but as soon as he goes into the middle of the printbed he gives a Error, called „Extruder not configured“ so I wanted to ask if someone could help me with my problem
         Best regards

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         1. Hi! I just noticed a few things that I changed since I wrote this article 3 years ago. The extruder numbers and tool numbers no longer matched my current config. One problem was that all the T0/T1/T2 numbers were off by one. T0 was incorrectly using only the direct-drive extruder with no others synced to it. T1 was the first spool (extruder0) synced, which again was wrong (this is what T0 should have done).

            I updated the article to reflect how my config looks now. Hopefully you see how the extruder numbers are assigned (correctly this time) and which T0/T1/T2 does what. Let me know if you have any questions!

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            1. Hi, now I used the new configuration, but I have three extruders, the first, called „extruder“ is the Direct Drive the second and the third are normal bowdenextruders but now when the Orca slicer is changing to the third extruder it says „T2“ and there is the error: „Unknown Command T2“ so do you have a advice to fix this issue because my setup is like when I want to print Single Color I use the direct drive and when I want to print dual Color I use the other two extruders
               Best Regards

            2. It sounds like your setup is different. Each of my spools go through one bowden extruder and through the direct-drive extruder.

               Here is what I imagine your setup looks like (let me know if it’s wrong): You have 3 spools that feed a single direct-drive hotend via a 3-way splitter. The 1st spool goes through the splitter to the direct-drive. The 2nd and 3rd spools each go through their own bowden extruder which pushes the filament through the 3-way and on to the direct-drive.

               Assuming that is correct, I think you want T1 to synchronize the 1st bowden extruder, T2 synchronize the 2nd, and T0 not synchronize either. Since you can print using only the direct-drive (without any Bowden extuders active), I would rename your bowden extruders to start numbering them at 1 — that way the bowden numbers match up. T0 = extruder (DD), T1 = extruder+extruder1 (DD and 1st Bowden), T2 = extruder+extruder2 (DD and 2nd Bowden)

            3. Hi, so my exact setup is that I have one hotend with three extruders So and I followed your advice and configured it that T0 is the direct drive which I am only using for single Color prints, T1 belongs to the first bowdenextruder and T2 to the second bowdenextruder and I did a few tests for example I gave the input „T2“ and it said: „Extruder ˋextruder2´ now syncing with extruder“ as I want it but as soon as I start a printjob it prints only the first layer of the purge tower with the right extruder but when it should go into the middle of the printbed to start the printjob it says: „Extruder not configured“ even though it said: „Extruder ˋextruder1´ now syncing with ˋextruder´ before for printing the first layer of the purge tower so maybe it is a problem with the slicer, maybe the filament-start gcode or maybe the settings for the purge tower
               Best Regards

            4. That’s odd. I think it’s worth looking into the gcode file to see what the command is that breaks it. If it’s calling “T2”, it should work just like when you tested it. Do you have any custom gcode sections in Orca? I’m not familiar with Orca, but PrusaSlicer has a custom tool change gcode section. If I leave it blank, it just emits T0, T1, or T2 (whatever tool it calls for). I assume Orca is the same, unless for some reason Orca starts counting at 1 instead?

   2. Did you find a solution for “Extruder not configured” fault code? I am running into the same problem

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2. Thank’s a lot for the help. Had toolchange working before shared heater was marked as deprecared. This gave me the recipe to maake it work again. It’s a little funny that the hotend has to be referred to as a MOTION_QUEUE but it works.

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3. so love the documentation its really informative. Im currently rebuilding a Ender 3 pro. I have a biqu manta m5p board with a CB1 and running klipper. I have a hermit crab tool changer and I have everything beutifullly setup for my H2v2s Revo hotend. So I Have used your documentation to start setting up a bowden original creality extruder since it is on hermit crab uses the same hot end pins and a separate extruder. my question is I have on each hotend a Bl touch and the hotend is in different location. would something like this work under the start gcode?

   set_pressure_advance extruder=extruder1 advance=0.60 smooth_time=0.08
   SET_GCODE_OFFSET extruder=extruder1 Z=0.100 MOVE=1 # Adjust z-height
   SET_GCODE_OFFSET extruder=extruder1 X=5 y=5 # Account for different X and y offset

   Also would want to set the pid for the different hotends

   #control = pid
   #pid_kp = 41.287
   #pid_ki = 4.915
   #pid_kd = 86.703
   #min_temp: 0
   #max_temp: 250

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   1. Thank you! I’m glad you found it useful!

      You ask a good question. I might not do it on my current printer, but I would like to build another printer that has a quick-change hotend — something similar to the hermit crab. If I understand correctly, you need to set the gcode offset (and probably the BLtouch offset) for each hotend that you have. Looking at the command reference for SET_GCODE_OFFSET, that command is used to “virtually” change where the hotend is. It does not work for the extruders, so you can remove that argument. Something like this should be all you need:
      
SET_GCODE_OFFSET Z=0.100 MOVE=1 # Adjust z-height
SET_GCODE_OFFSET X=5 y=5 MOVE=1 # Account for different X and y offset

      You would need to run this with different X/Y/Z values for each of your hotends.

      I’m not entirely sure how to handle the BLtouch. The BLtouch offset would need to be changed each time you swap out your hotend. I briefly looked through the BLtouch commands and don’t see any commands to alter the offset from gcode. I suppose you could define multiple BLtouch sensors (one for each hotend) where each one has the appropriate offsets.

      Without having a hermit crab myself, I’m mostly speculating on how you could configure it. Hopefully this at least points you in the right direction.

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4. Hi Zero Theory,
   I used your “shared_heater” macro on my DELTA printer with 4 extruders single hot end, it works well, Thanks.
   Would you be able to create a Macro for running 4 extruders at the same time divided by variable percentage levels for each extruder?
   For example: “T0” would be 1 percentage variation = 100%, T1 would be different percentage variation = 100% and so on.
   I was able to do this in RepRap firmware but I can’t find anything for Klippr. Help would be much appreciated.
   Thanks

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   1. Hi Ambroz,

      I’m not sure that Klipper has anything built in that could do what you are asking. The only thing I can think of would be to sync all the extruders simultaneously. Instead of having tool change macros un-sync the extruders, something like this would sync all of them at once:

      SYNC_EXTRUDER_MOTION EXTRUDER=”extruder” MOTION_QUEUE=”extruder”
      SYNC_EXTRUDER_MOTION EXTRUDER=”extruder1″ MOTION_QUEUE=”extruder”
      SYNC_EXTRUDER_MOTION EXTRUDER=”extruder2″ MOTION_QUEUE=”extruder”
      SYNC_EXTRUDER_MOTION EXTRUDER=”extruder3″ MOTION_QUEUE=”extruder”
      SYNC_EXTRUDER_MOTION EXTRUDER=”extruder4″ MOTION_QUEUE=”extruder”

      In order to achieve a different speed for each extruder, I think you may have to adjust the “rotation_distance” parameter to trick klipper outputting more or less steps to each motor driver. Or perhaps the “gear_ratio” parameter may achieve the same thing more easily.

      Regardless, I think what you are asking for would require some non-trivial macros to it pull off. Probably do-able, but not that easily.

      Marc (Zero Theory)

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5. Option ‘filename’ is not valid in section ‘delayed_gcode startup_gcode’
   i cant figur this out im realy new to klipper working on a biqu b1 with the “b2 ” upgrade using a pi4b

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   1. I don’t know anything about Biqu printers, but it sounds like your Klipper config file is formatted wrong or you need to remove the ‘filename’ line from your startup_gcode. The ‘filename’ parameter belongs in the [save_variables] section. It is documented in the Klipper config reference here https://www.klipper3d.org/Config_Reference.html#save_variables

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6. Thank You very very much. I just slammed hard into this problem as the most recent update to Klipper has finally completely removed support for shared_heater. After updating my print was no longer responding. Your examples made it fairly easy to update my configuration and get it back to working.

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7. hi,

   thank you for posting this. i’ve added it to my printer.cfg however when the printer receives the change tool head to T1 i receive an error
   //extruder value is being passed
   !! the value ‘T1’ is not valid for extruder
   !! the value ‘T1’ is not valid for extruder
   I have kept your macro for t0 and t1 but removed the lines for the other steppers.
   I feel its something to do with my config which runs

   [extruder]
   step
   dir_pin
   enable

   [extruder_stepper extruder_1]
   extruder =
   step
   dir_pin
   enable

   when I add motion_queue = extruder both extruders run in sync so I know the board has the correct address

   Im sure its something incredibly silly i have missed.
   Any help would be awesome.

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8. Thank you very much. Your explanation should go on the documentation. I even tried v Voron forums since they seem to be a more active there but could not find anything that was referring to the deprecated shared heater.

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9. thank you very much I was looking for this information to set up 4 extruders with 1 single hotend
   you are talking about load filament so have you already written something about it or do you have a macro for example if you like?

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   1. I just published a short article to share my load/unload filament macros https://www.zerotheory.net/klipper-filament-load-and-unload-macros/

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      1. merci bcp

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10. I also have this problem “Extruder not configured” Did you find a solution to correct it because I can’t find it?
    thanks a lot

    Reply

    1. What slicer are you using? If I recall correctly, that error message comes when Klipper runs a tool change command (T0/T1/T2/etc.) but the specified tool does not exist. You may need to manually run some of the gcode commands to figure out which command is causing the error.

       I vaguely remember having an issue at the start of a print where the slicer (I use PrusaSlicer) tries to tell the printer to set the hotend temp for a certain extruder, but the specified extruder doesn’t really exist. If I sliced using extruder0 it worked, but if I sliced with any other extruder it would fail. I think the command was something like M104 T1 S200, meaning set the hotend for T1 to 200°. The way the shared_heater works means extruder1 (and up) does not have a real hotend to control (since it’s sharing the one from ‘extruder’). This would cause Klipper to error.

       Not sure if this is the problem you’re having but I had to edit Prusa’s “Start G-code” section to output the M104 without specifying a tool. It needs to be just M104 S200.

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11. thank you for your feedback
    I use orca slicer and yes the problem is indeed the one you say there is a command which asks t1 to heat while t1 has no heating, I am trying to get around the problem

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