I have a RAMPS 1.4 and I want to use the RRD fan extender board in combination with auto bed leveling servos, how do I do it?
The RRD board uses the normal servo connectors, so I won’t be able to connect the servo the ordinary way.
Can I just connect the servo to some of the unused digital pins? (e.g. D0/D1 ?).
Reconfiguring Marlin etc is not a problem, I just don’t want to damage the electronics.
Hehe, well, I’m lazy and I love auto bed leveling as it allows me to swap print surface with no extra work.
And I did consider just trying it but I really don’t want to wait for replacements parts:P
Hmm, I should think so?
All you need is some kind of endstop probe on the extruder, obviously it has to be “deployed” in some way (commonly done with a servo)
Marlin supports auto-bed leveling and I don’t think there is any difference between a Prusa i3 and any cube printer from the firmware point of view (in this context).
Also; I got it working by connecting the servo to pin 40 (on aux2).
Now my e3d v6 fan and print fan are connected to the RRD fan extender.
I really wanted the e3d fan connected to the ramps (instead of just directly to the psu), because now I can have marlin turn it on/off above a certain temperature (controlled in Configuration_adv.h).
I no longer have to turn off the psu to stop the e3d fan:p
I now also have D9 free for a second extruder.
Thank you for your post on http://forums.reprap.org/read.php?4,361772 linking back here. It solved my problem trying to get exactly the same thing working.
@Electra_Flarefire Great!