Thermostatic enclosure fan

Th0mpy

I've been looking around at the different posts on this topic and I cannot see how what I have is not correct.

I am setting up a cabinet fan (yep it's on my Voron). I have a thermistor connected and am getting a value in the chart. When I try to enable a fan at a set temperature it does not kick on. Am I missing something?

M308 S2 P"temp1" Y"thermistor" T10000 B3940 A"Chamber" ;setup values are correct, reading 24c at normal room temp
M950 F2 C"1.out8" Q500  
M106 P2 S1.0 H2 T20                                    ;below ambient temp so the fan should turn on

I confirm that my fan is functional, if I send a manual M106 P2 H-1 S1 the fan turns on at full bore.

I am running version 3.4-b3 in SBC mode.

Th0mpy

Ok, I have figured it out. I'm not sure if this is a bug or a limitation. @DC42 maybe you have an idea?

I moved the fan to the 6HC instead of the 3HC and changed the M950 code to be

M308 S2 P"temp1" Y"thermistor" T10000 B3940 A"Chamber"
M950 F2 C"out9" Q500
M106 P2 S1.0 H2 T20

Now it works fine!

I am able to get thermostatic control if all inputs and outputs are connected to one board, but the second I separate them it fails.

jay_s_uk

@th0mpy you can't have the temperature reading from one board control something on another board

Th0mpy

@jay_s_uk said in Thermostatic enclosure fan:

@th0mpy you can't have the temperature reading from one board control something on another board

Alright! That solves it then. Thank you for the confirmation.

Phaedrux

Check this page out to see what you can't do atm. https://duet3d.dozuki.com/Wiki/Duet_3_firmware_configuration_limitations