The HEIDENHAIN 393000-02 is a professional-grade AK ERM 280 incremental modular angle encoder. Utilizing advanced magnetic scanning technology and a MAGNODUR measuring standard, this unit is engineered for high reliability in harsh industrial environments, offering excellent resistance to contamination. It is widely utilized for precision feedback in C-axes of lathes and other rotary applications.

 

📊 Technical Specifications

• Model ID: 393000-02 (AK ERM 280)
• Line Count: 1024
• Grating Period: 395.00 µm
• Output Signal: ~ 1 Vpp (Sinusoidal voltage signals)
• Power Supply: 5V DC (±10%)
• Current Consumption: ≤ 150 mA (without load)
• Reference Mark: Analog
• Cable Length: 1.0 meter
• Operating Temperature: -10 °C to +100 °C
• Protection Class: IP 67 (when properly installed)
• Weight: Approx. 0.15 kg (including cable)

 

🛠 Mechanical Installation Requirements

• Fixing Method: The scanning head is designed for modular mounting. The scale drum (sold separately or as part of the system) should be centered on the shaft. Use a spacer foil to set the recommended mounting gap.
• Space Requirements: The modular design requires minimal installation space. Ensure the scanning head is positioned to maintain the specified air gap (typically 0.15 mm) between the sensor and the scale drum.
• Thermal & Physical Tolerance: The MAGNODUR scanning principle provides high tolerance to installation variations and contamination, making it ideal for compact machine integration where optical encoders might be restricted.

⚡ Electrical Wiring & Connectivity

• Signal Interface: Provides ~ 1 Vpp incremental signals suitable for high-precision motion control interfaces.
• Grounding Norms: The encoder housing must be correctly grounded to the machine frame to prevent electrical interference. Use shielded HEIDENHAIN-compliant cables to ensure signal integrity across distances of up to 150 meters.
• Pinout: Connection is handled via the integrated cable. Please consult the specific installation manual or the connector schematic for the exact wire-to-pin mapping, as shielding must be connected to the system ground at the control side.

 

📡 System Integration Steps

• Calibration: After physical mounting, verify the output signal amplitude using an oscilloscope to ensure the 1 Vpp signal level is maintained throughout the full rotation of the drum.
• Reference Mark Setup: Since the reference mark is analog, the control system must be configured to recognize the reference pulse signal during the machine homing or synchronization cycle.
• Baud Rate/Speed: As an incremental encoder, there is no “baud rate” for the encoder itself. The scanning frequency cutoff is > 300 kHz, supporting high rotational speeds common in lathe C-axis applications.

 

❓ Frequently Asked Questions

• Is this a complete system?

  The AK ERM 280 is a scanning head. Depending on your application, you will need a matching scale drum (TTR ERM 200 series) to complete the measurement system.

• Can this be used in oily environments?

  Yes. The magnetic scanning principle is highly resistant to contamination, including oil, dust, and vibrations, which are common in machine tool environments.

• What is the difference between this and optical encoders?

  This is a magnetic encoder, which prioritizes ruggedness and ease of installation over the ultra-high resolution typically found in high-end optical angle encoders.

• Does it support high shaft speeds?

  Yes, the ERM 200 series is designed for continuous operation at high shaft speeds, making it ideal for high-speed machining centers.