Connection advice Water cooled extruder
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We are running a Titan Aqua extruder which is water cooled. I currently have the fan and pump, always on, connected to the 24vdc power supply via a 24vdc to 12vdc step down transformer. I think the proper way to do this is to connect this to the PWM fan0. From the comments on the E3D website the total current draw with fan and pump should be 1.0amps @ 24vdc. Thank you in advance for you input.
Carl
There is no box!
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@CarlBosson Im working on a similar setup. Its always been my plan to power the pump and radiator fan constantly using the 24v to 12v step down converter provided, powered directly from the 24v PSU. Is there a reason you prefer not to power it continuously?
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@travasky I was hoping to tune the control loop. But maybe this can still be done with the system continuously on? I was really looing for advice to see which was the best way to manage this.
Carl
There is no box!
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@CarlBosson The water cooling system should always be running - the same way a hot end fan would be and youll want to do your hot end PID tuning with the pump running. Even though heat creep across the heat break should be very small its still pulling energy out of the hot end.
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@CarlBosson there is no downside other than possibly slightly higher energy use to having the pump running constantly. Depending on the size of your reservoir, and the amount of heat you need to pull out the titan, along with ambient temp you may not need the fan, but once again it's not doing any harm really running constantly. (Possibly slight noise aside).
You can chuck a spare thermistor into the reservoir and monitor the temperature there if you fancy it and have a spare temperature input.
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@T3P3Tony Thanks to all for your input. I will leave it as is.
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@CarlBosson The only reason to not use it like a thermostatic fan, is that normal fan outputs do not source enough power. However, one can use a DC SSR , or a heater output, with due care, depending of your configuration (!). I prefer this way, to not have it running all the time, like I would not do it for a normal fan.
However, if the printer is printing much more time than be on hold, the only reason to have the possibility to stop it (from the panel, or DWC), while the rest of the printer is running, is for some particular maintenance issues, wich albeit they may be very rare... they may appear from time to time.
A simple flow sensor (mechanical) for visually checking now and then, and the said thermistor, are very nice to have, as T3P3Tony pointed out, especially with multiple cooling systems. -
@soare0 Thank you.
