Posts made by pro3d

@droftarts

I might have been unclear in op. As I wrote in I know there are other options, but I am asking this:

Can I use a buck 24V-12V on OUT 6 V_OUTLC1/GND and connect my 12V fans to the buck+out6.tach+out6(pwm). Will the PWM signal be 24V now? Does the PWM need to be lowered as well?

I want to control the pump separate from the fans, so I was wondering if I could connect the pump to the same buck for 12V power and then use out5.tach+out5(pwm)

The total current draw will be 1.1A so this is only possible using OUT 4-6 on 24V

If the above is possible I wonder what to do with the PWM signal, does it still send 24V? and does it need resistors to work properly on 12V fan/pump

I just want answer to the above and not other options. I am exploring if this is possible^ and if not, I will connect the pump to OUT 0 on 12V there, then run tacho to another free pin somewhere

Duet 3 6HC 1.01 - 12V 4PIN 150ma 2xfans and 12V 4PIN pump (800ma brushless) on OUT X (4-6)?

I know there are other options, but I want to know if its OK to add a buck converter to OUT X (4-6) V_OUT/GND to run my 12V fans and my 12V pump from that?

The pump and the fans both have tacho and PWM so if the above is OK then what about the PWM signal? Is this still 24V? and do I need to add resistors for this to be right?

The firmware would be something like this:
M950 F5 C"!out5+out5.tach"
M106 P5 C"Water pump" S1 H1 T50

M950 F6 C"!out6+out6.tach"
M106 P6 C"Radiator Fan" S1 H1 T50

Since being a brushless pump would this be ok? What about the PWM signal? Can it be used without any mods?

Or must it be something like this:

@moth4017 managed to get this sorted out with the daemon.g file and some if, elif commands

Now the fan activate when heater turns on, and off when temp is below 35c

@fcwilt said in Turn on a fan automatically when a heater is activated?:

@pro3d said in Turn on a fan automatically when a heater is activated?:

This would not report box temp as being close to the heater temperature would be higher than chamber temp

I've gotten confused.

I thought the goal was to turn on the fan to protect the fan shroud.

So if the sensor is near the shroud would it not serve to protect the shroud by turning on the fan before the temp was high enough to be a problem?

Frederick

Yes but the sensor is supposed to monitor the chamber/box temp. Not the heater temperature, so the sensor need to be away from the heater....

@fcwilt said in Turn on a fan automatically when a heater is activated?:

@pro3d

Well if you put the sensor where the heat is an issue and set the threshold to 30 it should turn on quite soon after the heat turns on.

Frederick

This would not report box temp as being close to the heater temperature would be higher than chamber temp

@fcwilt said in Turn on a fan automatically when a heater is activated?:

@pro3d

I was thinking of putting the temp sensor in the box.

So what bad things would happen if it didn't come on until the temp sensor read some threshold temp?

Thanks.

Frederick

The sensor will not read more than ambient for a while and the heater will go wild and the fan shroud will creep/melt

@fcwilt said in Turn on a fan automatically when a heater is activated?:

@pro3d

Does it have to come on immediately or could it be tied to temperature?

You could have a temp sensor placed where appropriate and set up the fan to be tied to a threshold temp, like you would with a extruder fan.

Frederick

It has to come immediately yes. As the Temp sensor is in the box, not on the heater

@deckingman said in Turn on a fan automatically when a heater is activated?:

@pro3d Or how about wire a small relay in parallel with the heater, connect the contacts to a spare io pin and use that to run a trigger macro which will turn on the fan.

Yeah I was hoping to solve this by firmware without to much workarounds. It would be nice to trigger the fan just by activating the heater by firmware. But maybe it's not straight forward as I thought

@jay_s_uk said in Turn on a fan automatically when a heater is activated?:

@pro3d you can use the object model to get the heater status and daemon.g to control the fan

I am not familiar with daemon.g

@dc42 said in Turn on a fan automatically when a heater is activated?:

@pro3d can you connect the fan in parallel with the heater, if they accept the same voltage?

I would have to check but we want the fan to stay on after the heater is turned off. At least for a while to cool down the heater. Is it possible to make a conditional relation?

I have a drybox that acts as a chamber in DWC. As a safety feature I would like to turn on the fan when activating the heater in the chamber (drybox). Is this possible and how? I know I can set the fan to be always on but that is not what I am looking for. I want something like "If Hx=1 then Fx=1"

This is why I need this function:

Just an update. This was all very simple when using the inputshaper plugin! Great work guys

@pro3d

I added a 510 ohm resistor to the SDO and now it detects the meter

Can someone help with configureing accelerometer?

I have followed the documentation on each point I think.. How ever I am not sure if I should route the CS cable somewhere else as the picture in docs show.. It shows a duet 3 mini I think.

Am I supposed to use all the TEMP doughterboard pins or also some others? I am confused

Second picture is from the docs

@droftarts

Thanks

@thedragonlord

You can use 2 x 12V fans in series though. The PWM out pins dont like stepdowns I hear. Not sure though

Can we have multiple chambers? I have 2... and can only add one it seems?

@engikeneer

Ah OK that makes sense then

@droftarts

RRF 3.4.1 is the firmware and DWC version