OSOYOO 3D Printer Controller Kit Ramps 1.4 + Full Graphic Smart Display Controller + Mega2560 + A4988 Stepper Motor Driver for RepRap (Ramps 1.4+12864LCD+Mega2560+A4988Driver)

3D printer Kit guide: http://osoyoo.com/driver/3D%20printer%20instructions.pdf 

Caution: 

1) The max power supply for these ramps is 12V and the max watts is about 180W. The max watts for the hotbed is about 100W and the max temperature is just 50 degree Celsius. 

2) Do not plug or unplug and wire or module when power is on, do not even touch the board when power is on or your hand has static charge(you can remove static charge by touching metal tap) . 

3) Always double check power wire is properly installed. If you do not follow above move, you may damage the control board and your 3D printer. 

4) Pls confirm the A4988 driver install correctly on Ramps1.4 board. 

5) The endstop pins are Signal-GND-VCC, instead of VCC-Signal-GND like the rest of RepRaps boards. Make sure to wire them correctly. This is done to allow squeezing fatter traces on the printable board.

6) Don't secure Arduino/Ramps with conductive screws through both mounting holes. The screw may cut into the positive trace creating a HIGH current short.

7) Test all electronics thoroughly before placing into service.

8) Do not leave power supplied to electronics unattended, or run machines unattended due to the risk of fire and malfunction.

9) Once you start putting electricity into your RepRap - even at just 12 volts - you have to take basic, common sense precautions to avoid fires. Just in case these fail. test your workshop smoke detector.

Product Specification: 

1) Marlin firmware update: Arduino IDE 1.5.X 

2) This kit consists of a RAMPS 1.4 shield, an Mega 2560 board, five Stepper drivers and a LCD. It can control up to 5 stepper motors with 1/16 stepping precision and interface