Constant "Toolchanger problem has been detected" errors
 
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Constant "Toolchanger problem has been detected" errors  

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Chad
 Chad
(@chad)
Miembro
Constant "Toolchanger problem has been detected" errors

We recently added a Prusa XL with the 5 heads to our Makers Space at work.  I've tried to do a multicolor print and run into constant "toolchanger problem has been detected" errors (see image below). 

I have found that the docks were getting loose after a while.  So far what I have done:

  • tightened each dock screw and added blue locktite
  • adjusted the nozzle seal height on each dock
  • lubricated the guide pins
  • re-run the "Tool Offset Calibration"
  • re-run the "Dock Position Calibration"

I originally thought maybe it was a slicer g-code issue, but it's not happening in the same spot each time.  It's also not happening with the same head, it will happen with different heads.  After doing the steps above it is MUCH better and happens less frequently, but still keep having the issue.

I'm not sure if there is something with the tool head or something else that could be causing the issue.  

Here is a pic of one of the heads after the error.  I do have videos of the tool changes, my slicer and g-code files as well.

 

XL info:

  • Firmware v5.1.0
  • Bootloader v 2.3.0
  • Buddy Board 9

Prusa Slicer:

  • v2.7.0
Respondido : 15/12/2023 5:02 pm
Chad
 Chad
(@chad)
Miembro
Topic starter answered:
RE: Constant "Toolchanger problem has been detected" errors

Noticed this article too.  I'm going to check if we have the latest docks or not printed.  

https://forum.prusa3d.com/forum/original-prusa-xl-tool-changer-hardware-firmware-and-software-help/dock-fixing-bolt-becoming-loose/

I'm also not sure based on the guides on the tool head, if something is happening where those are out of position between head changes.

Respondido : 15/12/2023 6:09 pm
Nikhil S.
(@nikhil-s)
Trusted Member
RE: Constant "Toolchanger problem has been detected" errors

I'm curious if you are hearing a different sound as each tool is picked and parked.  On my machine, there is some sort of alignment issue with dock #5 and the sound it makes is CLEARLY different than the other 4.  That may be a clue as to a misalignment for you as well.  I don't have a solution on mine.  I even swapped docks 4 and 5 with their printheads (basically a complete swap from 4 to 5), and the problem stayed at toolhead #5, so it's definitely a positional issue at that spot.

Maybe you have something similar. Is it by chance always the same toolhead?

Brand new to 3D printing and my 5-tool XL is my first 3D Printer!Check out my Multi-Tool fork of PrusaSlicer to mix and match nozzle sizes.

Respondido : 15/12/2023 6:33 pm
Ronnie C.
(@ronnie-c)
Miembro
RE: Constant "Toolchanger problem has been detected" errors

I setup my 5 head XL over this last week. I was running into a similar tool crash problem. At its worst it would crash just about every time certain tool heads were selected. What was pretty clear is I was loosing steps somewhere in the print and that would show up when the printer tried to re-dock certain heads. I would hear a lout vibration/grow when the printer would move quickly in a couple of specific directions. I spent a lot of time making sure everything was moving freely, but I didn't find an obvious issue. When I checked the belt tension One belt was quite tight (90-100 htz.), while the other was in the upper 80's. I brought both belts to the mid 80's and had far fewer crashes but still a couple every now and then. I progressively worked my way down to about 75-76 htz in tension. I have not had any issues for the last 48 hours or so of printing. I believe it is recommended to be a little tighter 75 htz, but I have not noticed any layer alignment issues. After each adjustment I went through and recalibrated the docks and the tool offset. I hope this helps others. It worked magic on my printer. 

Respondido : 01/01/2024 10:51 pm
Dionarap
(@dionarap)
Miembro
RE: Constant "Toolchanger problem has been detected" errors

I had a similar problem with the toolchanger not working all the time, I checked the Friktion of the PTFE pins in the toolchanger. on the upper one the pins did not produce enough friction to stop the "latch" from moveing while traveling between the tool. so check the friktion of these PTFE-pins.

see also the comments of "Step 4 Preparing the ToolChanger" ( https://help.prusa3d.com/guide/5-extruder-accessories-assembly_523539#523739 )

Respondido : 07/02/2024 1:32 pm
Carsten Larsen
(@carsten-larsen)
New Member
RE: Constant "Toolchanger problem has been detected" errors

exactly same problem here, constant crash detected, but can just hit continue and the printer starts again, but this I really annoying since I can't leave the house when a print is running, is there anyway to have it ignore the alarm, and just continue?

Sincerely

Carsten Larsen

Respondido : 19/02/2024 8:51 am
Sergio
(@sergio-2)
Miembro
RE: Constant "Toolchanger problem has been detected" errors

I'm absolutely newbie in the Prusa world, I started yesterday my first print and I encountered multiple times this issue when trying to switch nozzles, until now only during printing.

I was wondering if this belt tension trick solved the issue in the long term. If so, I would by trying it first before experimenting with other parameters.

Cheers,

Sergio

Respondido : 16/03/2024 7:02 am
cansley
(@cansley)
New Member
RE: Constant "Toolchanger problem has been detected" errors

This is exactly the problem I am facing. The springs are not sufficient to put pressure on the ptfe pins, therefore not enough friction on the slide mechanism. This means that when the tool head parks and the carriage moves, the top slide ever so slightly moves and is then out of alignment for the next tool head. How did you resolve this, or did you? different springs, different pins?

Posted by: @dionarap

I had a similar problem with the toolchanger not working all the time, I checked the Friktion of the PTFE pins in the toolchanger. on the upper one the pins did not produce enough friction to stop the "latch" from moveing while traveling between the tool. so check the friktion of these PTFE-pins.

see also the comments of "Step 4 Preparing the ToolChanger" ( https://help.prusa3d.com/guide/5-extruder-accessories-assembly_523539#523739 )

 

Respondido : 15/06/2024 2:47 am
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