Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of your HXX CNC GCS906 2-Axis Digital Readout (DRO) Kit. This high-accuracy system is designed to enhance precision in various machining applications, including milling, lathe, and turning operations. Please read this manual thoroughly before using the product to ensure safe and efficient operation.
Package Contents
Your HXX CNC GCS906 2-Axis DRO Kit includes the following components:
- 1 x GCS906-2 Digital Readout (DRO) Display Unit
- 1 x Display Cover
- 1 x Mounting Bracket for DRO
- 1 x Screw Bag for DRO mounting
- 1 x User Manual (English or Russian electronic version)
- 2 x GCS898 Linear Scales (0.005mm/5um resolution, travel length 50mm-1000mm, customizable)
- 2 x Linear Scale Covers
- 2 x Mounting Brackets for Linear Scales
- 2 x Screw Bags for Linear Scale mounting
Note: When ordering a complete set, please specify the desired travel length for your linear scales. You can do this by contacting the seller directly or by leaving a message during the order confirmation process. Clearly state whether you are providing the 'scales travel length' or 'scales total length'. If not specified, the default will be travel length.
Travel length: The maximum working length of the scale.
Mounting hole distance: Travel length + 120mm.
Total length: Travel length + 138mm.


Setup and Installation
Proper installation is crucial for the accuracy and longevity of your DRO system. Follow these general guidelines:
1. Mounting the Digital Readout (DRO) Display
- Select a stable and easily accessible location on your machine for the DRO display.
- Use the provided mounting bracket and screws to securely attach the display unit.




2. Installing the Linear Scales
- Attach the linear scales to the moving axes of your machine (e.g., X, Y, Z axes for milling, or X, Z axes for lathe).
- Ensure the scales are parallel to the axis of motion and the readhead moves smoothly along the scale.
- Use the provided scale covers, mounting brackets, and screws for secure and protected installation.
- Connect the linear scale cables to the corresponding ports on the back of the DRO display unit. The cables are typically 3 meters long, but custom lengths may be available.





3. Power Connection
- Connect the power cable to the DRO unit and a suitable power outlet. The DRO supports AC 80V-260V, 50HZ-60 HZ.
- Ensure the correct plug type (AU, EU, US, UK) is used for your region.

Operating Instructions
The GCS906 DRO offers a range of functions for precise measurement and control. Familiarize yourself with the keypad and display for optimal use.

Basic Functions:
- English Language Display: The DRO features an English language interface for ease of use.
- Zero Clearing: Press the 'ZERO' key to reset the current axis reading to zero.
- Reset: Resets the system.
- mm/inch Mode: Toggle between millimeters and inches using the 'MM/INCH' conversion key.
- Metric/Imperial Conversion: Converts between metric and imperial units.
- ABS/INC Coordinate Conversion: Switch between absolute and incremental coordinate modes.
- Power-off Memory: The system retains its last state after power-off.
- Sleeping Mode: The DRO can enter a low-power sleep mode.
- Radius / Diameter Function: Converts between radius and diameter displays.
- Self-motion Middle Parted Function: Automatically finds the center point.
- Digital Filtering & Vibration Filtering: Reduces noise and instability in readings.
Advanced Functions:
- 200 Sets Sub Datum: Store and recall up to 200 sub-datums.
- Liner Error Compensation: Compensates for linear errors in the scales.
- Calculator: Perform basic calculations directly on the DRO.
- Drilling of Circumference (PCD Function): Facilitates drilling holes on a pitch circle diameter.
- Drilling of Oblique Line: Aids in drilling along an angled path.
- Machining of Inclined Plane: Supports machining operations on angled surfaces.
- Machining of Circular Arc (ARC Key): Assists in machining circular arc profiles.
- Rectangular Lumen Gradual Processing: For gradual processing of rectangular lumens.
- Cant Processing Function: For angled processing.
- PLD Function: (Specific function, refer to detailed manual for usage).
- Lathe Function: Specific functions tailored for lathe operations.
- EDM Function: (Optional, contact seller if needed).
Accessing Internal Functions:
To access the internal functions of the DRO, press and hold the number "8" key to jump to the settings page. From there, you can set resolution, direction conversion, diameter/radius conversion, and other parameters.
Applications:
The digital readout and grating ruler or encoder adaptor are widely used in various machine tools to measure and control length and angle. This system can significantly improve work efficiency and processing accuracy.

Maintenance
To ensure the long-term accuracy and performance of your HXX DRO kit, follow these maintenance guidelines:
- Cleaning: Regularly clean the display unit and linear scales with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials that could damage the surfaces.
- Protection: The linear scales feature water- and oil-resistant dust-proof adhesive strips and a sealed protective cover. While designed for durability, avoid excessive exposure to liquids, dust, oil, and iron filings. Ensure the protective covers are properly installed.
- Cable Inspection: Periodically check all cables for any signs of wear, cuts, or damage. Ensure connections are secure. The cables are made of 304 stainless steel conduit for corrosion and oil resistance.
- Environmental Conditions: Operate the DRO within the specified temperature range of 0°C-45°C and relative humidity of <90%.
- Storage: When not in use for extended periods, store the unit in a clean, dry environment.



Troubleshooting
If you encounter issues with your HXX DRO kit, consider the following common troubleshooting steps:
- No Display/Power: Check the power connection and ensure the power switch on the back of the DRO is in the 'ON' position. Verify the power outlet is functional.
- Incorrect Readings: Ensure all linear scale cables are securely connected to the correct axis ports on the DRO. Check for any physical obstructions or damage to the linear scales or readheads. Verify that the resolution and direction settings are correctly configured in the DRO's internal functions (refer to Operating Instructions).
- Intermittent Readings: This could be due to loose connections, excessive vibration, or electromagnetic interference. Secure all connections, ensure stable mounting, and check for nearby sources of electrical noise.
- Buttons Unresponsive: Ensure the display is not in a locked mode. If the issue persists, try restarting the DRO unit.
For persistent issues not resolved by these steps, please contact customer support.
Specifications
GCS906 Digital Readout Display System:
| Feature | Specification |
|---|---|
| Model Number | GCS906-2 |
| Voltage Range | AC 80V-260V, 50HZ-60 HZ |
| Power Consumption | 25VA |
| Operating Temperature | 0°C-45°C |
| Relative Humidity | <90% (20±50°C) |
| Weight | Approx. 1.8kg |
| Number of Coordinates | Two coordinates |
| Display | Signed 7-bit display (two-axis) data, 8-bit meter display symbol output |
| Multiplier | 4X |
| Input Signal | TTL square wave (optional EIA-422 or RS-422) |
| Allowable Input Signal Frequency | > 100KHz |
| DRO Reading Resolution | 0.5um, 1um, 2um, 5um, 10um (selectable) |
| Voltage for Scales | 5V (optional 24V) |
| Plug Options | AU, EU, US, UK etc. |
| Certification | CE |
GCS898 Linear Scale:
| Feature | Specification |
|---|---|
| Model | GCS898 |
| Travel Length (Available Measurement) | 50mm to 1000mm (can be customized) |
| Overall Length | Travel length + 138mm |
| Cross Section Size | 21mm x 33mm |
| Input Voltage | 5VDC |
| Output Signal | TTL (DB9 plug) |
| Linear Scale Resolution | 5um (0.005mm) |
| Cable Length | 3 meters (longer available) |

User Tips
- Calibration: After initial installation and periodically during use, verify the accuracy of your DRO readings against known standards or precision measurement tools. This ensures consistent precision in your work.
- Environmental Stability: For the most accurate results, operate your machine and DRO in a stable environment, minimizing temperature fluctuations and vibrations.
- Cable Management: Route all cables carefully to prevent pinching, snagging, or interference with machine movement. Secure them to prevent accidental disconnection.
Support
For any questions, technical assistance, or support regarding your HXX CNC GCS906 2-Axis DRO Kit, please do not hesitate to contact the seller. We are committed to providing good service and look forward to assisting you.