I was wondering if someone could tell me what the G-code command(s) is/are for the three cnc-fan ports on the SKR pro 1.2?
I’ve got a small 12V fan that I am going to position to blow over the heat sinks on my drivers, and I’d like to turn it on when the g-code starts and back off when it ends.
I assume from the ‘1.2’ you are asking about the SKR Pro 1.2. I don’t own an SKR board, but looking in the pins file for the Pro 1.2, there are pins defined for all three fan outputs:
I am running RAMPS 1.4 and about to install a 5010 12V fan to keep the driver heat sinks cool.
Now I realise this is not completely necessary but I suspect I am talking amongst like minded genetically predisposed tinkerers!
There are spare unused temperature inputs available on our boards as well as a PWM outputs… which took me wondering down the rabbit hole of:
a.) attaching a spare thermistor to a driver heat sink to keep an eye on driver temperature on the LCD
b.) driving the fan to maintain a max temperature of say 60degC
I am sure it is possible without too much problem although I have fallen at the first hurdle of a.) ! I have connected a thermistor to the temperature input of Ramps 1.4, changed firmware to probe type 30 and the LCD display still displays zero.