Blown fan MOSFET, using different pin on RRF2.x

[droftarts]

@supermarioprof see the notes under the pin table. In RRF 2, pins are pre assigned, so you need to unassign them first:

RRF 2.x - Disable a heater using M307 H# A-1 C-1 D-1 to make the pin available, where # is the heater number, and make sure that no tool is configured to use that heater.
RRF 2.x - Disable a fan using M106 P# I-1 to make the pin available, where # is the fan number.

https://docs.duet3d.com/Duet3D_hardware/Duet_2_family/Duet_2_WiFi_Ethernet_Hardware_Overview#inputoutput

Ian

[supermarioprof]

@droftarts Oh my god I totally missed that line in the guide!
so, if I correctly understood:

say I wanna use pin 8 <--> HEATER3

this should be these gcodes:
M307 H3 A-1 C-1 D-1
M42 P3 I1 S240

I can't try right now, my damaged Duet3D is still under repair, but I will try as soon as possible.

Last question:
I will need to change my gcodes and my slicer settings, will I?
because FAN0, FAN1 e FAN2 are connected to specific pins (20-22), but my new fan1 should be pin 8, so what?

p.s.: I would like to change the thread title so that it will be more inherent with current content, but....is it possible? I can't find any button or settings

[Phaedrux]

Is there a reason to stay on RRF2?

[droftarts]

@supermarioprof said in FAN mosfet probably blown:

I will need to change my gcodes and my slicer settings, will I?
because FAN0, FAN1 e FAN2 are connected to specific pins (20-22), but my new fan1 should be pin 8, so what?

Are you going to have an external MOSFEt? Pin 8, and all expansion pins, are 3.3V signalling, ie not enough to run a fan directly. You can control it with M106, by using the A parameter in RRF 2.x, see https://docs.duet3d.com/User_manual/Reference/Gcodes#m106-fan-on and the notes:

The A parameter can be used to assign a fan to a different output pin, for example a spare heater output (use a M307 command to disable the heater and free up the pin first).

p.s.: I would like to change the thread title so that it will be more inherent with current content, but....is it possible? I can't find any button or settings

Edit the first post, you can change the thread title there.

Ian

[supermarioprof]

@Phaedrux Summer laziness, now I need my 3d printer to be working reliably for a while. during Christmas holiday I will upgrade to RRF3

[supermarioprof]

@droftarts sure I can use an external MOSFET or a Fotek SSR.
thank you very much, M106... A is exactly what I was looking for!

[supermarioprof]

@droftarts said in FAN mosfet probably blown:

Edit the first post, you can change the thread title there.
Ian

impossible, too late... 🥺

[droftarts]

@supermarioprof Okay, I can, what do you want it to say?

Ian

[supermarioprof]

@droftarts "Fan MOSFET blown - using different pin on RRF2.x" could be good, or something like that, it's up to you, thanks!

[droftarts]

@supermarioprof Done, going to mark as solved too.

Ian