How to Use C25XP - Ethernet Smooth Stepper Integrated board: Examples, Pinouts, and Specs

The C25XP - Ethernet Smooth Stepper Integrated Board (Manufacturer Part ID: C25XP V4.1) is a high-performance motion control board designed for CNC applications. Manufactured by CNC4PC, this board integrates Ethernet connectivity to enable high-speed communication and precise control of stepper motors. It is ideal for multi-axis systems, offering advanced features that simplify setup and enhance motion control accuracy.

• CNC routers, mills, lathes, and plasma cutters
• Multi-axis motion control systems
• Industrial automation requiring precise stepper motor control
• Retrofitting older CNC machines with modern motion control capabilities
• Applications requiring Ethernet-based communication for real-time control

The C25XP board features multiple connectors for stepper motor control, inputs, outputs, and power. Below is the pin configuration:

1. Power Supply: Connect a regulated 5V DC power supply to the +5V and GND pins. Ensure the power supply can provide sufficient current for the board and connected devices.
2. Ethernet Connection: Use a standard Ethernet cable to connect the C25XP to your PC or network. Configure the IP address of the board using the provided software or manual.
3. Stepper Motor Connections: Connect the step and direction signals for each axis to the corresponding pins (e.g., X+, X-, etc.). Ensure proper wiring to avoid damage to the motors or board.
4. Inputs and Outputs: Wire sensors, switches, or other devices to the input pins (IN1, IN2, etc.) and connect actuators or indicators to the output pins (OUT1, OUT2, etc.).
5. Software Configuration: Install the required motion control software (e.g., Mach3 or Mach4) on your PC. Configure the software to communicate with the C25XP via Ethernet and set up the pin mappings for your specific application.

• Use shielded cables for stepper motor connections to minimize electromagnetic interference (EMI).
• Ensure proper grounding of the board and connected devices to avoid noise issues.
• Verify the stepper motor driver compatibility with the C25XP's 5V TTL logic signals.
• Avoid exceeding the maximum step frequency of 4 MHz to ensure reliable operation.
• Regularly update the firmware and software to benefit from the latest features and bug fixes.

Although the C25XP is primarily designed for CNC applications, it can be interfaced with an Arduino UNO for custom control. Below is an example of how to send step and direction signals to the X-axis:

// Define pins for step and direction signals
const int stepPin = 2;  // Step signal for X-axis
const int dirPin = 3;   // Direction signal for X-axis

void setup() {
  // Set step and direction pins as outputs
  pinMode(stepPin, OUTPUT);
  pinMode(dirPin, OUTPUT);

  // Set initial direction
  digitalWrite(dirPin, HIGH); // HIGH = forward, LOW = reverse
}

void loop() {
  // Generate step pulses
  digitalWrite(stepPin, HIGH); // Set step pin HIGH
  delayMicroseconds(500);      // Wait 500 microseconds
  digitalWrite(stepPin, LOW);  // Set step pin LOW
  delayMicroseconds(500);      // Wait 500 microseconds
}

Note: Ensure the Arduino's 5V logic levels are compatible with the C25XP's inputs. Use level shifters if necessary.

1. No Communication with the Board

   • Cause: Incorrect Ethernet configuration or cable issue.
   • Solution: Verify the Ethernet cable connection and ensure the PC and board are on the same network. Check the IP address settings in the software.

2. Stepper Motors Not Moving

   • Cause: Incorrect wiring or configuration.
   • Solution: Double-check the step and direction signal connections. Ensure the motor drivers are powered and configured correctly.

3. Inputs or Outputs Not Responding

   • Cause: Faulty wiring or incorrect software configuration.
   • Solution: Test the input/output pins with a multimeter. Verify the pin mappings in the software.

4. Excessive Noise or EMI

   • Cause: Unshielded cables or poor grounding.
   • Solution: Use shielded cables and ensure proper grounding of all components.

• Q: Can the C25XP control servo motors?
  A: The C25XP is designed for stepper motors. However, it can interface with servo motor drivers that accept step and direction signals.

• Q: Is the C25XP compatible with Mach4?
  A: Yes, the C25XP is fully compatible with both Mach3 and Mach4 software.

• Q: What is the maximum cable length for Ethernet communication?
  A: The maximum recommended cable length is 100 meters (328 feet) for standard Ethernet.

• Q: Can I use the C25XP with a USB-to-Ethernet adapter?
  A: Yes, but ensure the adapter is reliable and does not introduce latency.

By following this documentation, users can effectively integrate and operate the C25XP in their CNC or motion control systems.