Duet 3 Expansion 1HCL tacho reading

[matej1006]

@oliof i think that wires aren't twisted but whole cable is shielded with aluminium foil

[dc42]

@matej1006 this would be better if you can find it https://www.thomann.de/gb/sommer_cable_quantum_highflex_multipair_2.htm. However, for a cable length of only 2m the type of cable is not critical.

[matej1006]

@dc42 can I use OUT 0 and OUT 1 on tisti same board for PWM controlling my noctua fans and water pump. Will be same as fan pwm output?

[dc42]

@matej1006 yes you can, provided the current they require doesn't exceed the rating of the outputs. Check the water pump starting current in particular.

[matej1006]

@dc42 it is a 12V pc Water colling so i think it will be ok but i will check just to be sure about it

[matej1006]

@dc42 if i connect 12v directly from power supply tacho won't work ?

[dc42]

@matej1006 tacho connections should still work of you connect the positive fan wire direct to +12V.

[matej1006]

@dc42 this is how have now connected all . And pump won't start! GND is commom

[dc42]

@matej1006 have you the specification of the pump?

You may need to invert the polarity of the out port in the M950 command, as you would for a PWM fan.

[matej1006]

@dc42 it is 12Vdc 17W pump which can be connected directly to pc Mother board
I did try to invert and pullup and nothing was different

[dc42]

@matej1006 does the pump work if you disconnect the blue PWM wire?

[matej1006]

@dc42

; Water colling PUMP
M950 F2 C"!Fan0" Q25000 										; fan 2 is a 4-wire PWM fan so invert it, use high PWM frequency, tacho connected to PB6 on expansion connector
M106 P2 H5 I1 T20:25 L255                                       ; set fan 2 value. Thermostatic control is turned on

This is my code from duet2 eth board
Now I have duet3 6hc
I try same code and it wasn't work

If I swap noctua fans with pump fans works on this output out6 pump on out5 is same nothing from her

That I didn't try I Will tommorow