If you build or upgrade your printer with/to DUAL-EXTRUSION (2 extruders) including a heated bed all the output ports (D8, D10) will be used.In this case, there is no option to connect a firmware controlled FAN to RAMPS board directly.
However, in Sprinter/Marlin firmware there is an option already (Marlin: BOARD=34) which redirects the FAN to RAMPS output D4. But this solution needs a "buffer/driver" in order to work.
The RRD-FAN-EXTENDER is exactly
what you need in this case.It is a plug and plays solution to mount the
FAN for DUAL-EXTRUSION setups with RAMPS1.4. But instead of adding only
one additional output port the RRD-FAN-EXTENDER is equipped with 2 PWM
controllable channels(D6/D11). The second channel can be used for
another fan(e.g. to cool the stepper driver) or for adding light control
(e.g. add dimmable LED light to your machine).
Specifications:
-
Support Max 20V- 2 (PWM controllable) channels (D6/D11)- Easy to
install, Plug and Play- Support per channel Max 0.5A, enough for a big
fan- Flexible output voltage (you can connect the RRD-FAN-EXTENDER to
12V,5V,... in order to support the output voltage you need)- Already
supported by Marlin firmware (choose "#define MOTHERBOARD 34")- Easy to
adapt to other firmware (e.g. Sprinter: just change "#define FAN_PIN 6"
in "pins.h")Features:
1. You need Marlin firmware v3 or newer. If
you are using the older firmware, you must re-flash your board.
2. Power up, two connecting fans will take turns to rotate.3. Can be connected follow the description picture.
Package includes:
1 xReprap Ramps1.4 RRD Fan Extender (The fan is not included)
Note: all the descriptions and prices are subject to change without prior notice.
Free Shipping: No
Shipping Weight/Unit(g): 0.00
Std. Packing Qty. (pcs): 1
