@cosmowave If anything, I'd look for an optocoupled PWM board, but IMHO it's unlikely that a dead MOSFet backfires through the gate and damage the duet.

@droftarts
I got the Expansion board already, so I'll use that for now with the single extruder, but yes it seems the Duex is the way to go when I'm ready to uprade.

Was not aware of the PanelDue controller... I'll just get that when I'm ready.

Much thanks for your help. I dropped this for a couple weeks due to work crises, but back on it now.

Cheers,
-Neil.

Well confirmed, heater cartridge needed to be replaced. Thanks for the help.

@phaedrux Yup I blew the 7.5a fuse in the extension board. There has to be a short in the heater cables.

@dc42 OOOOH. Thanks for the info, I'll get to playing then!

It looks like the SD card managed to corrupt itself. We managed to recover most of the data on it but had to recreate the config.g file.

Lesson learned to keep good backups and perhaps the SD card is due for replacement.

@dc42 said in Step Servo motors on Duet 3 boards:

Duet 3 MB6XD

Thanks for the reply. Will start working on that

Thanks for the tip

@tratoon see https://docs.duet3d.com/en/User_manual/Connecting_hardware/Fans_connecting

Ian

@tratoon the wires are thin so you can crimp two of them into one pin.

If you have a Fritz Box router, the automatic switch-off in standby mode of the printer also works with a Fritz socket (for example: AVM FRITZ! DECT 200), where you can set the voltage and the time.
For example, if there is 20 watts in the socket for 10 minutes, it switches itself off.

Video
AVM Website

Google Translate
----- Original Text -----

Wenn Du einen Fritz Box Router hast, dann funktioniert das automatische ausschalten im Standby Betrieb des Druckers auch mit einer Fritz Steckdose (zum Beispiel: AVM FRITZ! DECT 200), dort kannst Du die Spannung einstellen und die Zeit.
Befindet sich zum Beispiel 20 Watt für 10 Minuten an der Steckdose, dann schaltet sie sich ab.

Thank you for clarification, I was concerned that I've overstressed capacitors which would lead to nasty failure.
Now I am relived 🙂

Kind Regards,

Also, I have a system with a fan that won't turn off, I'm guessing that's a bad MOSFET?

From DC42

It's rare for the heater mosfets to fail. On Duet 2s the driver chips can fail if there is a transient on the +5V rail. If it's the mosfet that has failed, it's possible to replace it using a hot plate and hot air desoldering tool.

To test whether it is the mosfet or the driver, the general approach is to identify the mosfet gate series resistor (which is close to the mosfet gate terminal) and measure the voltage between each end of it and ground. If both ends are at +5V then the driver is commanding the mosfet on, so either the driver IC or the MCU has failed (assuming it does this with no SD card, which you've already got him to check). If the driver end of the resistor is close to 0V then the driver is commanding the mosfet off, so it's the mosfet that has failed.

@o_lampe it’s this this thread: https://forum.duet3d.com/topic/16124/

I need to add the info to the expansion board page.

Ian

@bigwood247 said in Led on the duet mother board lights up:

Hi I have had a duet wifi for a wile now but recently have had a problem with the led lighting up when I move my y axis and x axis even when there's no power going to the board I use a ac relay for a keenovo 800 watt silicone bed

That's normal. When you move the motors by hand they act as generators. The stepper driver chips feed the power they generate into the fused side of the VIN supply.

OK... no idea what I'm doin but I go forward into the docs as if all is OK and I find there's an Input shaping plug in!!! I download and install and now I get a sample graph that looks like the following...
c366f66a-c36b-4114-951f-e16e21113a1b-image.png

@axiom

Use M302 P1

https://docs.duet3d.com/User_manual/Reference/Gcodes#m302-allow-cold-extrudes

@darkcolman you're welcome. glad you're up and running