RAMPS 1.4 REPRAP 3D PRINTER CONTROLLER + Mega 2560 R3 +4 A4988 Drivers, US $5400 – Picture 0

RAMPS 1.4 REPRAP 3D PRINTER CONTROLLER + Mega 2560 R3 +4 A4988 Drivers, US $5400 – Picture 1

Ramps 1.4 Reprap 3d Printer Controller + Mega 2560 R3 +4 A4988 Drivers

US $5400

Guangzhou , China
Jan 30th

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RAMPS 1.4 REPRAP 3D PRINTER CONTROLLER + Mega 2560 R3 +4 A4988 Drivers RAMPS 1.4 REPRAP 3D PRINTER CONTROLLER + Mega 2560 R3 +4 A4988 Drivers It is designed as a small package of low cost RepRap needs, to adapt to the electronic. Ar-duino MEGA platform inclined interface and powerful Ar-duino mega, and have sufficient expanding space. Replacement parts in extrusion control electronic machine for repair, stepping driver and a Ar-duino MEGA shield, modular design ability to upgrade and expansion include plug-in. In addition, the extension board Arduino, can be added to the system, as long as the main ramp plate is saved to the top of the stack. The board is mainly based on the Adrian Pololu_Electronics and Tonok. Method of copper etching resistance to Vic suggested. Also inspired by his work EasyDrivers. Design of the main circuit on the basis of Adrian'sPololu_Electronics Joaz RepRapSource.com offers improved initial pin definition and many design. Too much of the inspiration, advice, and from Prusajr, Kliment, Maxbots, Rick, RepRap and many other community. Characteristic 1 it is right angle coordinate robot and provisions of extruder. 2 Extended to control parts. 3 heater / fan output and 3 thermistor circuit MOSFET. 4 fusion 5A extra security and component protection 5 heating bed control 11A fuse additional 6 for 5 Pololu stepper drive plate 7.Pololu plate pin socket, so they can be easily replaced or removed for future design. 8.I2C and SPI pins left for future expansion. 9 all MOSFET hooked up to the PWM pin is universal. 10 servo type connector for connecting to a terminal block, a motor and a light emitting diode. These connectors plated, rated current is 3A, very compact. 11.SD card add - is now available from Kliment - Sdramps 12.LED indicates the heater output -13 option 2 motors are connected to the Z Prusa Mendel The A4988 is a complete microstepping motor driver with built-in converter, easy to operate. The products can be in full, half, 1/4, 1/8 and 1/16 step mode of operation bipolar stepper motor, output drive performance up to 35 V and ± 2 A. A4988 includes a fixed off time current regulator, the regulator can be in slow or mixed decay mode. The converter is the key to the easy implementation of the A4988. As long as the input of a pulse in the "step" in the input can be driven motor, microstep. There are no phase sequence tables, high frequency control interface programming or complex. The application of A4988 interface is very suitable for complex microprocessor is not available or overload. In the stepping operation, the chopping control in the A4988 automatically selects the current decay mode (slow or mixed). In mixed decay mode, the device is initially set to rapid degradation in the portion of the fixed off time, then the attenuation in the stop time slow the rest. Mixed decay current control scheme can reduce the audible motor noise, increased step accuracy, and reduced power consumption. Provide internal synchronous rectification control circuitry, in order to improve the pulse width modulation (PWM) power consumption during operation. Internal circuit protection includes: thermal shutdown with hysteresis, undervoltage lockout (UVLO) and crossover current protection. Don't need special power up sequencing. A4988 uses surface mount QFN package (ES), the size is 5 mm x 5 mm, nominal overall package height is 0.90 mm, with an exposed thermal pad to enhance heat dissipation function. The package is a lead-free package (suffix - T), with 100% matte tin leadframe plating. Function and advantages Low RDS (open) output Automatic current decay mode detection / choice Mixed with slow current decay mode The low power dissipation of synchronous rectifier Internal UVLO Crossover current protection 3.3 and 5 V compatible logic supply Thermal shutdown circuit Ground fault protection Loading and short circuit protection The optional five step mode: full, 1/2, 1/4, 1/8 and 1/16 Package include: 1 x 1.4 RAMPS Arduino Shield 1x MEGA 2560 R3 16mhz Clone 4x A4988 Stepper Driver rated at 1A and cooling with up to 2A, Note: this board now comes with heat sinks. On Sep-21-14 at 09:25:47 PDT, seller added the following information: