electronics manufacturing company Mega 2560 R3 + RAMPS 1.4 Controller+5Pcs A4988 Stepper Driver Module+1Pcs MK3 Aluminum Heatbed

  electronics manufacturing company Mega 2560 R3 + RAMPS 1.4 Controller+5Pcs A4988 Stepper Driver Module+1Pcs MK3 Aluminum Heatbed

Description:

MK3:

MK3 choose two working voltage of 12V and 24V, more practical; MK3 aluminum plate is used in the process, because the aluminum plate material is expensive and production costs tend to be ordinary glass plate expensive, so, MK3 are expensive.

12V connection: a cable connected to one another while connected to a wire 2,3.

24V connection: a cable connection 2, in addition to a cable connection 3 (1 left unconnected).

The new version of the circuit, whether connected 12V, or 24V, Power are stable


Parameters:

1, the voltage 12V/24V.

2, process: aluminum plate

3, Size: 214X214mm

4, thickness: 3mm

5, Color: Black

Ramps:

RepRap  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 Ard Mega with the powerful Ard MEGA platform and has plenty room for expansion. The modular design includes plug in stepper drivers and extruder control electronics on an Ard MEGA shield for easy service, part replacement, upgrade-ability and expansion. Additionally, a number of Ard 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.

A4988:

A4988 is a complete microstepping motor driver with built-in translator for easy operation. This product is available in full, half, 1/4, 1/8 and 1/16 step modes operate bipolar stepper motors, output drive capacity of up to 35 V and ± 2 A. A4988 includes a fixed off-time current regulator, the regulator in slow or mixed decay modes. A4988 converter is the key to the easy implementation. As long as the "step" input inputting one pulse drives the motor one microstep. There are no phase sequence tables, high frequency control lines, or complex interfaces to program. A4988 interface is very suitable for complex microprocessor is unavailable or is overburdened.
     In the micro-step operation, A4988 chopping control inside automatically selects the current decay mode (Slow or Mixed). In mixed decay mode, the device is initially set to a fixed downtime in some fast decay, then the rest of the slow decay downtime. Mixed decay current control scheme results in reduced audible motor noise, increased step accuracy, and reduced power consumption. Internal synchronous rectification control circuitry is provided to improve the pulse-width modulation (PWM) operation power consumption. Internal circuit protection includes: thermal shutdown with hysteresis, undervoltage lockout (UVLO), and crossover-current protection. Special power sequencing.
     A4988 surface mount QFN package (ES), a size of 5 mm × 5 mm, nominal overall package height of 0.90 mm, with an exposed pad for enhanced thermal dissipation. This package is Pb (suffix-T), with 100% matte tin leadframe plating.
Features and Benefits
· Low RDS (On) Output
· Automatic current decay mode detection / selection
· Mix with slow current decay modes
· Synchronous rectification for low power dissipation
· Internal UVLO
· Cross-current protection
· 3.3 and 5 V compatible logic supply
· Thermal shutdown circuitry
· Ground fault protection
· Load short-circuit protection
· Optional step five modes: full, 1/2, 1/4, 1/8 and 1/16

Mega 2560:

Operationg Voltage                               5V

Input Voltage  (recommended)            7-12V

Input Voltage(limits)                            6-20V

Digital I/O Pins                                     54(of which 14 provide PWM output)

Analong INput Pins                               16        

DC Current per I/O Pin                        40mA

DC Currentfor 3.3 V Pin                       50mA

Flash Memory                                       256 KB of which 4 KB used by bootloader

SRAM                                                     8 KB

EEPROM                                                4KB