Now I know you can do this on a Melzi, but is it possible to add a second ramps (1.4) to add extruders? https://reprap.org/forum/read.php?219,201272,201272#msg-201272 Mon, 10 Aug 2026 19:39:58 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?219,201272,205661#msg-205661 https://reprap.org/forum/read.php?219,201272,205661#msg-205661 thread with a guy connecting 2 arduinos to connect lcd touchscreen.

so i guess the answer is also yes for additional extruders.]]> f3rDz RAMPS Electronics Sun, 05 May 2013 12:38:02 -0400 https://reprap.org/forum/read.php?219,201272,204955#msg-204955 https://reprap.org/forum/read.php?219,201272,204955#msg-204955
From what I can tell, the Master/Slave melzi configuration works by connecting the TX, RX, SCL, and Reset lines between the two boards and communicating over custom firmware. It shouldn't be too hard to do the same thing with two Arduino's, although I'm not sure what the SCL line is for (my understanding is that SCL is for I2C). From there, its just a matter of firmware. I'm not sure if the RepRapPro Marlin will run on a RAMPS board.]]> thedingwing RAMPS Electronics Thu, 02 May 2013 20:03:38 -0400 https://reprap.org/forum/read.php?219,201272,201272#msg-201272 https://reprap.org/forum/read.php?219,201272,201272#msg-201272 Maxx Mayhem RAMPS Electronics Fri, 19 Apr 2013 19:04:53 -0400