Part Cooling Blower Fan
Is the blower fan voltage 5 volts? It's being supplied by the Einsey board, VCC-FAN?
I checked the schematic but wanted to double check here in case I have the wrong schematic.
Have been thinking of trying to add an additional blower fan and parallel wire it to the existing fan control MINUS the RPM feedback wire.
I have one of these in the drawer to try out. https://www.digikey.com/product-detail/en/sunon-fans/GB0545AFV1-8.B1824.GN/259-1446-ND/1638380 it seems to be quiet and moves fair amount of air.
Or this one: https://www.digikey.com/product-detail/en/delta-electronics/BFB04505HHA-A/603-1365-ND/2560489 that moves more air and is in stock but slightly more noise and draws 160ma instead of 70ma on the first listed blower above. Not sure what additional 5v power is safe to pull from the on-board regulator or the fan control transistor.
Thanks
MK3 Kit, Designed, built 4x4 CNC Plasma Cutting Table, Motorcycles Bigdogbro's Adventures
http://www.youtube.com/channel/UC5djrxBeeOKB9_6rHnn6G8A
Re: Part Cooling Blower Fan
Yep, both fans on the extruder assembly are 5v.
Re: Part Cooling Blower Fan
and your additional fan is only 70ma draw, should not overload the switching transistor.
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
Re: Part Cooling Blower Fan
Well, it seems there is no room to add another cooling fan at the rear of the extruder.
Plan B - Have a beer!
MK3 Kit, Designed, built 4x4 CNC Plasma Cutting Table, Motorcycles Bigdogbro's Adventures
http://www.youtube.com/channel/UC5djrxBeeOKB9_6rHnn6G8A
Re: Part Cooling Blower Fan
Since the Mk1, PR have had difficulties designing a good fan outlet 🙁
You could always do what may of us already have done, and that is to create your own design. (I haven't done this for the Mk3 as yet, only the Mk1 & Mk2...). There may already be redesigns on Thingiverse - worth a look.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…