Multiplier for fan speed?
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So, the doc is pretty clear https://docs.duet3d.com/en/User_manual/Connecting_hardware/Fans_connecting#connecting-fans-to-duet-fan-pins states that it expects Intel spec fans, as in two pulses per revolution.
I happen to use a blower that has a signal at which 1Hz means 60rpm. Any way to fudge the value so that the DWC shows the actual value?
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@janjoh I suggest you create a feature request for this at https://github.com/Duet3D/RepRapFirmware/issues. We would need to add an additional parameter to the M950 command when it is used to create a fan.
Duet WiFi hardware designer and firmware engineer
Please do not ask me for Duet support via PM or email, use the forum
http://www.escher3d.com, https://miscsolutions.wordpress.com -
@dc42 THank you for confirming. I've added such a request now, while at the same time understanding that this is in every way a cosmetical low priority wish
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@janjoh
I had once a similar problem. My Duet2 was not able to read the low rpm of a flowmeter.
My solution was for sure a bit complex. But it was a cool experience, because it was my first project with a raspberry pi pico and phyton.
I have devloped a tacho signal "shifter". You can multiply or divide every incoming signal by 1-15.
https://forum.duet3d.com/topic/29703/possibility-to-read-tacho-signals-with-lower-rpm/11?_=1705701794232 -
@cosmowave While the thought HAD crossed my mind, i figured that it is not that important.
I however tip my hat for a creative workaround
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@janjoh please try the new firmware at https://www.dropbox.com/scl/fo/p0136wx04h8xf6ejwdnn9/h?rlkey=efrfwyb6o5tqid11gustz3uvy&dl=0 and use the new K parameter in your M950 command that defines the fan connection.
