Never used the Smart LCD controller from reprapdiscount on the Rambo but on the Rumba I discovered the silkscreen for the cable layout was completely messed up.
The cable that is supposed to go to EXP1 goes to EXP2 and visa versa. And just to be sure to completely mess with your head, both cables need to be installed upside down.
This just might get you where you want to be.
The cable that is supposed to go to EXP1 goes to EXP2 and visa versa. And just to be sure to completely mess with your head, both cables need to be installed upside down.
This just might get you where you want to be.