RepRap Arduino Mega Pololu Shield, or RAMPS for short, is designed to fit the entire electronics needed for a RepRap in one small, but powerful package for low cost. RAMPS interfaces with the powerful Arduino MEGA platform and has plenty room for expansion. The modular design controls the movement of the 3D printer, 2 x extruders, 2 x hotends and a heated bed while sensing the temperature of the hotends and heated bed. Additionally, a number of Arduino expansion boards can be added to the system as long as the main RAMPS board is kept to the top of the stack. Most popular expansions include a LCD display, SD card reader, a cooling fan or two and a second extruder.
You will need the Arduino MEGA 2560 controller to be able to use the RAMPS 1.4 board.
Posted by Kyle Futter on 1st Sep 2016
It is a very good board for 3D printing, the most popular in the rep rap community, but it is not as simple as plug in and go, it will take you time to get it set up and work through all the problems, for instance, if you are using the Marlin firmware for your printer and you need max end stops then you will have to manually assign the pins in the code, and I had problems with the connectivity between it and the Arduino, I had to de solder the dc jack on the Arduino to be able to push the pins in all the way, don't let that that discourage you from buying this board though, it has the biggest community so you will be able to figure out any problems you have and it gives you room to expand with the possibility for dual extrusion, overall very good product
Posted by Louis Rensburg on 25th Mar 2016
Wire it right and it will treat you well.
All prices are in USD.