#Move exceeds maximum extrusion

24 messages · Page 1 of 1 (latest)

trim creek
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I am getting the error message "Move exceeds maximum extrusion (0.361mm^2 vs 0.080mm^2)
See the 'max_extrude_cross_section' config option for details"

I have just changed from a 0.6mm nozzle to a 0.25 mm nozzle.

I get this error immediately after printing the prime blob

I have changed the nozzle size in printer.cfg and I have changed the line width in Slicer.
I have reduced the speed to 20% in Mainsail
Not sure what to try next.

quiet reefBOT
#

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trim creek
stone vortex
# trim creek

Why is it faster to change it manually instead of through the configurator?

trim creek
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Because you have to step through all the screens on the configurator.

#

..and it wants to check the version of your MCU board set up, etc.

I will often change nozzle sizes three or four times a day. So it is just quicker to do it in the printer.cfg file.

stone vortex
rugged basalt
#

A side note for future readers (not OP): if you're using IDEX/VAOC, according to Mikkel, nozzle size changes need to be done via the configurator for VAOC to work properly.

trim creek
stone vortex
swift stirrup
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I'm running into the same issue. have an IDEX 500 and it errors as soon as it starts using the second extruder during the print. It does the blob and purge just fine. The frustrating part is it was printing perfectly fine before. I can't find any changes in the Prusa Slicer but now it errors out every time... 😕

This is the error message from the console:
3:00 PM
Move exceeds maximum extrusion (1.915mm^2 vs 1.440mm^2)
3:00 PM
Move exceeds maximum extrusion (1.915mm^2 vs 1.440mm^2)
See the 'max_extrude_cross_section' config option for details

📎 logs-20250910-150546.zip
raw elk
#

open your own thread please.

proud crystal
mild grotto
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@trim creek you need to run the configurator again changing the nozzle size. This calculations are done automaticaly by ratos.

trim creek
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That would be pain in the neck to have to do that each time I change nozzle size. All I need to do when swapping between nozzle sizes for other nozzle sizes is just change it in printer.cfg

[extruder]
nozzle_diameter: 0.4

But when I change it to 0.25 I have to do the following.

[extruder]
nozzle_diameter: 0.25 #faster for me to change nozzle size here than in the RatOS configurator
max_extrude_cross_section: 0.4 # only required if usihg 0.25 nozzle to print prime blob.

I think the issue is in the prime blob macro.

Ideally you would want to have to only change the nozzle size in Slicer to achieve both of the above.

mild grotto
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Exactly. The issue is the blob because RatOs thinks it is using a different nozzle.
Check both configs agter runing the configurator and you will have the correct values for each nozzle and you can add them after a # in printer.cfg
Remember, RatOS is made for a novice user ti have no issues with configs. More advanced people can do whatever they want when it is possible.

proud crystal
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Can you not just click on the hardware section change the nozzle and save?

mild grotto
proud crystal
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Ye I’ve been switching between fan types, another story.

#

Just change from PWM - Input voltage, hit next and the save the final config.

trim creek
mild grotto
mild grotto