Remap limited PWM fan speed range
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I've got @Egon-Net's digital-to-analog board for use with a (non-PWM) part cooling fan with the Duet 3 mini 5+.
I finally found the time to hook it up, but am looking for a nicer way to the fan speed control. The thing is:
Egon's board makes 0-255 PWM turn into 0-12v. My fan only turns on at 4.5v. I configured the minimum speed to be 100 PWM (with M106 L100).When turning the fan on and setting it's speed, I'm noticing the following:
1-40% = constant 4.7v
40-100% = 4.7 - 12vI would however like it to behave like this:
1-100% = 4.7 - 12v (I.e. 100-255 PWM)Is this (currently) possible in some way?
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Not you can't currently remap the range as far as I know.
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That would be too bad. Is this something that could be implemented in a future release of RRF? Where would a feature request like that need to be submitted?
It could be backwards compatible by simply introducing another parameter to M106, which specifies the range, like
M106 X100:255(I know X is already used, it's just intended as a placeholder). -
I'll move to the wish list
