RAMPS 1.4 3D Printer Kit with Arduino Mega2560 + A4988 for RepRap Pololu SaintSm

3D Printer Controller RAMPS 1.4

 The RepRap Arduino-compatible MEGA Pololu Shield, or RAMPS for short. It is designed to fit the entire electronics needed for a RepRap in one small package for low cost. RAMPS interfaces an Arduino-compatible Mega with the powerful Arduino-compatible MEGA platform and has plenty room for expansion. The modular design includes plug in stepper drivers and extruder control electronics on an Arduino-compatible MEGA shield for easy service, part replacement, upgrade-ability and expansion. 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.

Version 1.4 uses surface mount capacitors and resistors to further cover edge issue cases.

Mega 2560 control board

the board is an ATmega2560 as core microcontroller development board itself has 54 groups digital I / O input / output terminal (14 groups do PWM outputs), 16 sets of simulation than the input side, group 4 UARTs (hardware serial ports), using the 16 MHz crystal oscillator. With the bootloader, download the program directly via USB without having to go through other external writer. Supply part of the optional USB power, or as an external power using the AC-to-DC adapter and battery. Arduino development IDE interface is based on open-source principles, allows you to free download for use in project work, school teaching, motor control, interactive works.

Microcontroller
 

ATmega2560 Operating Voltage    5V

Input Voltage (recommended)        7-12V

Input Voltage (limits)                        6-20V

Digital I/O Pins                                 54 (of which 15 provide PWM output)

Analog Input Pins                             16

DC Current per I/O Pin                     40 mA

DC Current for 3.3V Pin                   50 mA

Flash Memory                                   256 KB of which 8 KB used by bootloader

SRAM                                                8 KB

EEPROM                                          4 KB

Clock Speed                                    16MHz

 A4988 driver module:

A4988 Stepper Motor Driver Board is  a breakout board for Allegro’s A4988 DMOS Microstepping Driver with Translator and Overcurrent Protection; please read the A4988 datasheet carefullybefore using this product.
Warning: Connecting or disconnecting a stepper motor while the driver is powered can destroy the driver. (More generally, rewiring anything while it is powered isasking for trouble.)
 
● Maximum output current is 1A
● Simple step and direction control interface
● Five different step resolutions: full-step, half-step, quarter-step, eighth-step, and sixteenth-step
● Adjustable current control lets you set the maximum current output with a potentiometer,which lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates
● Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay)
● Over-temperature thermal shutdown, under-voltage lockout, and crossover-current protection
● Short-to-ground and shorted-load protection

Package included:

1 x 3D Printer Controller RAMPS 1.4

1 x Arduino Compatible Mega 2560 R3

5 x A4988 driver + Self Adhensive Heatsink

1 x USB cableand shorted-load protection

Product ID: EP00114