Control the E3D Water Cooling System via a FAN Port
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Good afternoon, soon I'll implement my printer even adding an original E3D Water Cooling System. I would like, if possible, to "control" it as a tool cooling fan to make it start (and stop) only when the tool reaches a given temperature (tipically 50°C). I would like to do so because it happens frequentely that a print finish when I'm not at home and I would like the Coolyng System to stop at a certain point and not running continuosly. If I'm not wrong the fan port can only support 1A at VIN on a Duet 2WiFi. The pump has a power of 10W. Adding the radiator's fan power to theese 10W I'm afraid I'm too close to 1A .. How about it? In case wolud it be possible in your opinion to drive the cooling system via a MOSFET connected to the fan port?
Thanks
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@the_dragonlord, 1.0A or even a little more continuous is OK; but the real problem is the current surge when the pump is turned on, which is likely to exceed the 3.5A peak rating of the fan mosfet.
Do you have a spare heater output on the Duet?
Duet WiFi hardware designer and firmware engineer
Please do not ask me for Duet support via PM or email, use the forum
http://www.escher3d.com, https://miscsolutions.wordpress.com -
My previous setup was comparable to what your describing but used a 360 radiator (3x120mm 12v fans) running thermostatically off Tool 0 linked to the PWM 12/24 pins of my duex5. The pump (24v) was also thermostatically controlled running off Fan2 of the duet linked to Tool0. That configuration caused a few issues, one being I kept forgetting to enable part cooling in the slicer settings and the other was with varying the frequency of the pump. Since I'm typically printing high temp filaments (nylon, pc, pei) I ended up just moving the pump to run off Fan0 (continuous 24v). I'd recommend adding a water flow hall sensor off an endstop to trigger a fault halting the printer. If I'm remembering correctly the e3d cooler is a 80mm radiator setup, which isn't bad if your only interested in cooling the hot end but for nearly the same price you can piecemeal a better setup off amazon. I picked up a 360 cooler for >40$, 24v pump 25-ish, 40mm waterblocks 2 for 10 bucks. IMO from experience, your better off sourcing out individual components rather than some integrated system for future expansion possibilities. I've since replaced my 360 cooler with a homemade chiller setup, went from a 90 100F return temp to a consistent 60F. My steppers are much happier now.
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@dc42 said in Control the E3D Water Cooling System via a FAN Port:
@the_dragonlord, 1.0A or even a little more continuous is OK; but the real problem is the current surge when the pump is turned on, which is likely to exceed the 3.5A peak rating of the fan mosfet.
Do you have a spare heater output on the Duet?
Hi, yes, I haven't got an expansion board but I have free heater pins, how can I set one of them to drive the cooling system in place of the cooling fan driven by the temperature? I don't know if the pump can be driven via PWM but I don't think so so ON/OFF will be ok
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@jps0284 said in Control the E3D Water Cooling System via a FAN Port:
My previous setup was comparable to what your describing but used a 360 radiator (3x120mm 12v fans) running thermostatically off Tool 0 linked to the PWM 12/24 pins of my duex5. The pump (24v) was also thermostatically controlled running off Fan2 of the duet linked to Tool0. That configuration caused a few issues, one being I kept forgetting to enable part cooling in the slicer settings and the other was with varying the frequency of the pump. Since I'm typically printing high temp filaments (nylon, pc, pei) I ended up just moving the pump to run off Fan0 (continuous 24v). I'd recommend adding a water flow hall sensor off an endstop to trigger a fault halting the printer. If I'm remembering correctly the e3d cooler is a 80mm radiator setup, which isn't bad if your only interested in cooling the hot end but for nearly the same price you can piecemeal a better setup off amazon. I picked up a 360 cooler for >40$, 24v pump 25-ish, 40mm waterblocks 2 for 10 bucks. IMO from experience, your better off sourcing out individual components rather than some integrated system for future expansion possibilities. I've since replaced my 360 cooler with a homemade chiller setup, went from a 90 100F return temp to a consistent 60F. My steppers are much happier now.
Thanks but I've already ordered the E3D kit. Could you please give me an example for the hall sensor you mentioned? I'm not an expert so I don't know those devices...I've searched in Google and I found plenty models but I don't know what are best to use for this purpose and that can be coupled with the Duet....thanks
