Would be nice to set FAN target speed by RPM instead of PWM
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@theruttmeister OK. Perhaps You are right. I build a mass flow sensor once, but for 3d printing it might be an overkill. Just looking on how the blowers are made I thought the major difference is RPMs capability.
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@BoA In my opinion they is only one, good 5015 fan - Sunon MF50151VX-A99
I put it in all my printers and recommend to every one.
Even that it is 12V only it is worth the hassle to add a step-down to run it.
It maybe not the quietest at 100% but is super powerful and if you need to be more quite just run it slower. -
@dragonn said in Would be nice to set FAN target speed by RPM instead of PWM:
Sunon MF50151VX-A99
what about he MF50152VX-1L01C-Q99?
24V and pwm.
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@BoA said in Would be nice to set FAN target speed by RPM instead of PWM:
@theruttmeister OK. Perhaps You are right. I build a mass flow sensor once, but for 3d printing it might be an overkill. Just looking on how the blowers are made I thought the major difference is RPMs capability.
The original request, setting fan speed in rpm not pwm %, is still a good one!
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@Veti said in Would be nice to set FAN target speed by RPM instead of PWM:
@dragonn said in Would be nice to set FAN target speed by RPM instead of PWM:
Sunon MF50151VX-A99
what about he MF50152VX-1L01C-Q99?
24V and pwm.
No idea, first time I see that model. But it isn't available outside in regular shops, only on aliexpress. I am buying A99 in a regular electronics store and paying less for that one.
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@Veti Can I connect MF50152VX-1L01C-Q99 directly to 4pin fan header on duet3? With 24V voltage?
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@BoA
the duet 3 has 4 pin fan connectors for pwm fans.
check that the fan voltage is set to vin. -
@Veti That is clear. My concern was voltage on tacho pin and pwm pin. Well... perhaps only tacho.
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@BoA
i think the hardware overview makes it pretty clearhttps://duet3d.dozuki.com/Wiki/Duet_3_Mainboard_6HC_Hardware_Overview
6 PWM controllable fan channels. 3 of these support 4 wire fans including tacho reading. These can be run from either the input voltage, from 12V, or from external power for added flexibility. Also one always-on fan connector supplied with VIN voltage.
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@Veti Ok. I will give it a try soon
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@BoA said in Would be nice to set FAN target speed by RPM instead of PWM:
My concern was voltage on tacho pin and pwm pin.
they're generally active low to avoid voltage issues
