I see that folgertech has a 12v cooling fan. can it be used on the ft5-r2? if so, where do i hook it up on mks gen 1.4? also do i need to make any changes in marlin? pics would be nice.
The R2 has a 24V power supply, so you would typically use a 24V fan. I am assuming you are talking about the part cooling fan.
You connect it to D9 (left side of picture) No changes in firmware required.
agree with @knabo the R2 provided a couple of fans, one for the case and one for the hotend heatsink... but didn't provide a part cooler (at least not in my kit). when I added a part cooler, I had to purchase a fan, just be sure to get a 24V one like @knabo mentioned and hook it up to D9 on your mks
Thanks for the info, guys. I'll follow your guidance.