thanks for your fast reply!
ok that sounds good for the controllers. i completly forgot about the 12V convertes... they are also a bit behind the controllers, i will need to check if the airflow still reach them... otherwise i will change my cover design into 2x50mm fans that will provide 2x 16m^3/h instead of only 2x 7m^3 this will be a bit louder the the 40mm solution but will provide the same amount of air like the original fan but without the heavy noise...
maybe it helps to get some heatspreats on the 12V converters with the current 40mm soltuion, will come back as soon as i have tested everything and also upload my solution to thingiverse! thanks alot
If the stepper drivers overheat they shut off (and cool down quickly, and start up again). So you will get stuttering movement if you don't provide enough cooling.
If you have an UltiController, don't forget to get proper cooling to the 12V regulator.
Oh, and, YAY for a solution to remove the noise from the electronics fan!
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