High power fan with Duet 2 Wifi.

[cookie]

Hello,

I'm getting a high power fan to be used with Duet 2 Wifi. The model is Delta PFB1224UHE 24V 2.4A 12cm. Is this fan supposed to work with this board? Any caution since I never installed this much power fan before.

Also, I've read the wiki that there's brushed and brushless motor. Any idea which one is this fan?

Here's the PDF spec of this fan on official website

Thanks,
Cookie

[Veti]

the fan fuse is 1A.

[cookie]

@Veti Thanks. Then any idea what I need to do to make it works?

[Veti]

https://duet3d.dozuki.com/Wiki/Connecting_and_configuring_fans

Alternatively, if you have a spare heater output and you are using firmware 2.02 or later then you can use the heater output as an additional fan output (see later). You must always use a flyback diode if you connect a brushed DC motor to a heater output.

@dc42 however the site does not mention what the command is.

[mrehorstdmd]

The label on the picture you posted says "brushless"...

[cookie]

@mrehorstdmd haha, just overlook. Thanks.

[cookie]

@Veti Thanks. Now it became brushless motor powered by heater output and have no idea how to control the fan with command..

[Veti]

from the changelog

M106 supports a new A parameter to map the fan to a different fan output or a heater output, or to re-enable a disabled fan

Ann Logical pin number that this fan is connected to (supported in RRF >= 2.02) (not supported in RRF_3, use M950)

the question now would be what is the pin number?
edit: see https://duet3d.dozuki.com/Wiki/Using_servos_and_controlling_unused_IO_pins

[cookie]

Hello,

Thinking about another simple solution within 1A limit, the fan pressure become half of that high power one. The current for this fan is 1A with maximum 1.5A

This fan will run about 5-10 minutes at a time. Will it be too stretch for 1A fuse?
https://www.delta-fan.com/Download/Spec/FFB1224EHE.pdf

[Phaedrux]

We recommend no more than 1.5A continuous current draw from each fan output, although up to 3.5A for a few seconds while the fan starts up will not harm them.

https://duet3d.dozuki.com/Wiki/Connecting_and_configuring_fans

Please read this.

That second fan may be acceptable on the fan header but you may still blow the fuse. Replacing it with a 2a fuse may be necessary but then you're reducing your protection as well, and would likely void any warranty should damage occur.

Using the higher current heater output may be a better route.

And I have to ask, what are you doing that requires such large powerful fans?

[cookie]

@Phaedrux It's a bed cooling fan.

I've read them now but still not sure because I've no background in engineering.

Also, after hours of research. I've found another high efficient alternative which is rated 1.49A. It's NMB 12038VA-24R-GA-00

So, I think 2A fuse is acceptable because other fans are smaller .. but a lot cheaper anyway. Anyway, this fuse size is the Ampere of all running fans in the system and which I could buy typical car fuse and replace it right?

[Phaedrux]

@cookie said in High power fan with Duet 2 Wifi.:

typical car fuse and replace it right?

Yes

[cookie]

@Phaedrux Thanks a lot. After reading a bit and looking at the board, it seem to be 32V DC mini blade fuse like these right?

Now I can get spare fuses. Interestingly, a small 1A fuse is not available to buy on Digikey. Could get from somewhere else anyway

[dc42]

See https://duet3d.dozuki.com/Wiki/Connector_and_spare_part_numbers.

[cookie]

@dc42 Thanks a lot. I'm going to order today