Migration from Maestro to Duet 2 WiFi

Phaedrux

There is a fan voltage pin that allows you to input your own voltage line that will power the fans. For example, I use it on my wifi to supply 12v from my 24v PSU through a buck converter.

You'd have to check the maestro diagram to see if it's also there, but if it's similar to the wifi it is in the block of fan connectors.

gnydick

@phaedrux I don't know what I'm looking for. I see an EXT 5V near the other fan headers. but that's only 5V

https://d17kynu4zpq5hy.cloudfront.net/igi/duet3d/IU2QdUPV2BKihsm5.huge

Phaedrux

Look for VFAN jumper selector

gnydick

@phaedrux yeah, I see those, but it only says VIN or 5V, nothing about external

Phaedrux

@gnydick it's a jumper. You can either bridged the connection between VIn or 5v, or don't use the jumper and connect your own voltage supply straight to the pin.

Get what I mean?

gnydick

@phaedrux I understand jumpers, what I don't understand is where to connect my own supply.

Phaedrux

To the center pin.

gnydick

@phaedrux and it can be a single wire from the positive of my 24V power supply?

Phaedrux

That's right. But if your duet power supply is 24v and you want to power the fans at 24v just use the jumper to connect Vin to vfan.

Phaedrux

https://duet3d.dozuki.com/Wiki/Connecting_and_configuring_fans#Section_Using_12V_fans_when_VIN_is_24V

gnydick

@phaedrux obviously But I blew one of my mosfets, I think. It's weird. I can hook up a 24v blower to the AOF and it works fine. I hook it up to one of the other fans on the same rail as the AOF and it just spins slowly, no matter where I put the slider. I hook it up to the other rail (just FAN2) it and runs slowly. I don't understand how it's working at all if the mosfet blew on.

Is there possibly a config problem?

Phaedrux

@gnydick What does your M106 fan block look like in config.g?

You could try measuring the voltage of the fan pins with a multimeter, but be incredibly careful not to slip and short something.

gnydick

@phaedrux yeah, I've done that before, not going to tempt it.

M106 P0 S0.0 F100 I0 H-1 L0.3  - AOF rail
M106 P1 S0 I0 F250 H-1 L0.3 - AOF rail
M106 P2 S0 I0 F250 H-1 L0.3 - Left rail

Even if I change the setting to have L0, it still spins. Even with S0.

M106 P1 S0 F250 L0
M106 P0 S0 F250 L0
M106 P2 S0 F250 L0

Just keeps spinning slowly

Phaedrux

My guess is as good as yours as to what that ultimately means. Sorry.