GRBL Controller Bundle – Small

The Open Source Mechatronics’ GRBL Controller Bundle contains all the hardware for powering and controlling your  WorkBee, Ox CNC or other CNC machine.

The cables on this “Small” Bundle are designed for machines of the following sizes:

• 500mm x 750mm
• 750mm x 750mm
• 750mm x 1000mm

For bigger machines see our GRBL Controller Bundle – Large

Bundle Includes (Bill of Materials):

More Details:

Controller: The Controller comes is made up of the following items:

• 1 x Arduino UNO Compatible
  • 14 digital input/output pins – 6 pins can be used as PWM outputs
  • 6 analog inputs
  • 16 MHz crystal oscillator
  • Operates at 5V
  • Recommended input voltage range: 7V to 12V
  • Flash Memory: 32 KB (0.5KB used by bootloader)
  • SRAM: 2KB
  • EEPROM: 1KB
• 1 x CNC Shield V3
  • Version 3.00
  • 4-Axis support (X, Y, Z , A-Can duplicate X,Y,Z or do a full 4th axis with custom firmware using pins D12 and D13)
  • 2 x End stops for each axis (6 in total)
  • Uses GRBL as control software
  • Power supply: DC 12-36V
  • Interface: mini-USB
  • Maximum stepper motor current: less than 2A 2 phase 4 wire stepper motor
  • Over 1A stepper motors must use heat-sinks and/or other cooling (fan)
• 4 x DRV8825 Stepper Drivers
  • Low RDS (ON) outputs
  • Automatic current decay mode detection / selection
  • Internal UVLO
  • Mixed with slow current decay modes
  • Synchronous rectification for low power dissipation
  • Crossover-current protection
  • Thermal shutdown circuitry
  • 3.3 and 5 V compatible logic supply
  • Ground Fault Circuit
  • Load short-circuit protection
  • Six microstepping modes: full, 1/2, 1/4, 1/8, 1/16 and 1/32
• 1 x Fan – 40x40mm 24V
  • Dimensions: 40mm (L) x 40mm (W) x 10mm (H)
  • Rated Voltage: 24V
  • Current: 0.10A
  • Input Power: 0.84W
  • Nominal Speed: 6000 RPM
  • Air Flow: 5.75 CFM
  • Noise: 24 dBA
  • Wire Length: 250mm
  • Connector: 2pin 2.54mm

Power:

• MEAN WELL Power Supply – 24V 350W
  • Output Voltage-Channel 1: 24 V
  • Output Power: 350.4 W
  • Open Frame/Enclosed: Enclosed
  • Input Voltage: 90 VAC to 132 VAC/180 VAC to 264 VAC, 240 VDC to 370 VDC
  • Output Current-Channel 1: 14.6 A
  • Mounting Style: Chassis
  • Length: 215 mm
  • Width: 115 mm
  • Height: 30 mm
  • Input Frequency: 47 Hz to 63 Hz
  • Unit Weight: 760 g

Cables & Connectors:

• 4 Core Shielded Stepper Cables terminated at one end with JST SM 4P (Connector to Stepper Motors):
  • 1 x 2500mm
  • 2 x 3250mm
  • 1 x 3500mm
• 2 Core Shielded Signal Cables terminated at one end with JST SM 2P:
  • 1 x 1500mm
  • 1 x 3250mm
  • 1 x 3500mm
• DC Power Cable
  • 22 AWG
  • 1 x 500mm
• Ground Wire 
  • 20 AWG
  • 1 x 500mm
• Stepper Cables (CNC Shield to Connectors)
  • Dupont Female Connector at one end
  • 4 x 300mm
• EStop Cable
  • 22 AWG
  • 1 x 1000mm
• 4 x Terminal Block 5 Pole
• 3 x Terminal Block 3 Pole

Signal:

• 3 x Limit Switch Kits
  • 3 x Micro Limit Switch
  • 3 x Limit Switch Plate
  • 6 x M3 10mm Cap Head Screw
  • 3 x M5 8mm Low Profile Screw
  • 3 x M5 Drop-in Tee Nut
  • NOTE: The holes in the switch will need to be opened a little (3mm drill bit) to allow for the M3 screw or alternatively you can use a M3 tap to cut a thread into the plastic.
• 1 x EStop Switch
  • Ith: 10A, UI AC 660V.
  • Rated Load:  220VAC/6A 380VAC/4A 660VAC/2A 440VDC/0.3A 220VDC/0.5A 110VDC/1A
  • TYPE: N/C
  • Withstand Voltage: 2500V /60S
  • Temperature: -25?~+55?
  • Contact resistance:  <25mΩ

Wiring Schematic:

IMPORTANT NOTE:

NEVER connect or disconnections any wire while power is applied.
ALWAYS disconnect power before making any connections or disconnections.

Failure to do the above will result in damage to the stepper drivers.

Software:

• GRBL
• GBRL Controller
• Universal G-Code Sender

Links:

• http://blog.protoneer.co.nz/arduino-cnc-shield/