U1 PSU Fan Noise

U1 Toolchanger
1

This is just a little post to let you know that I cannot stress enough how nearly mandatory it is to mod the PSU fan in the U1 if you keep the printer in the same room as you. Switching to a Sunon MF60152V21000UA99 (under 10€) and removing the plastic grille on the PSU cover not only made the U1 so silent that I was worried the fan wasn’t running at all, but even the stepper drivers benefit from the improved airflow and run about 5°C cooler (around 78°C instead of 85°C for the same print).
I love the U1, but this constant noise was nearly too much.
1h of work if you are as unexperienced as me and absolutely worth it.

I really dont get it. Why the heck did Snapmaker put this screaming blender in an otherwise very well engineered machine that made this such an annoiance? Cannot be more than a couple of cents production cost, for a far better out-of-the-box user experience.

Warranty void, but my nerves are grateful :slight_smile:

2

I did a search for the fan, Amazon US, at $21 with a month shipping time ! I also searched for a tutorial how to accomplish your suggestion. I found an incorrect version on the Snapmaker wiki site, as it is a 24v fan and is squirrel-cage design.

Would you have a link for this project?

Update: Digikey has the fan for US$8.47 and it may not be a month to get it shipped.

3

could you please post a link with a tutorial if you have it? The fan model you posted works with 24Vdc but the Psu fan works at 12Vdc,right?

4

sure,
I followed mostly this guide

and got the fan from amazon within a day

5

If a fan rated for 24V works at 12V (I expect it will), that will contribute to its quietness.

6

yes but its airflow will be less than half… so quiter but unuseful and also dangerous

7

you all would be absolutely right abour half rotational speed, half air throughput and potential hazard if the original fan would have been 12V.
But, in fact, it is 24V. At least in my U1.

Picture of the fan in removed:

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8

Mostly, to cool electronics doesn’t require a huge airflow – just some airflow.

9

can anybody confirm its working without problems? anybody testet the heat production?
in the video it really sounds alot better…

for 10 euro this is a very handy mod if it works…

how hard it is to cut the grill? :smiley:

10

I cut the grille with the standard scissors that came with the printer. Its rather soft material and I took out all of it and smoothed it out a bit.

No issues with heat. Even with a 10h print and the temps on the drivers are also lower than before.

But I am the one who started this thread so that’s again no second opinion :slight_smile: