2020 extrusion printer - driver fan(7cm)

It attach to 2020 extrusion, can keep your RAMPS board stable, so stepper motor driver would not be too hot. Decrease situation of stepper motor loses steps.
Kind of screw use : M4-10mm(2)(attach on 2020 extrusion).

Power of fan can connect on:
1.Connect End stop port (5V-GND-Singal (yellow wire, not use) )
2.Or connect to power(12V)

Step 1 : Attach RAMPS and Arduino to DriverFan_B with M3 screw.
Step 2 : Attach board shelf to 2020 extrusion.
Step 3 : Attach 70mm Fan on DriverFan_A with M4 screw.
Step 4 : Attach DriverFan_B & DriverFan_A directly.
Step 5 : Connect other wires on RAMPS.