Bought my second 3D printer, Geeetech G2S pro, a dual extruder Bowden delta machine, finished assembly last night.
There are 4 fan sockets on the control board, one with speed control and 3 without, according to Geeetech website.
Out of the 3 without speed control, one is used for cooling the control board, the other 2 are for the 2 extruders.
The fan connected to the speed control socket is at the hotend and it is facing slight up towards the hotend and the structure it attach to. So apparently it is intended for cooling the hotend only, not the print. But in that case why does it need speed control? An always-on fits better for the purpose.
I plan to add a print cooling fan, which will require the speed controlled port. And the current hotend fan has to go somewhere else.
My questions are:
1) Are those extruders really need cooling? They are no where near any heating element and I doubt if they generate any noticeable heat when pushing filament through the tube.
2) If they do need cooling, is it OK to parallel connect the 2 fans to one port so I can spare one for the hotend?
