HEIDENHAIN ROD630 900 28S0 Incremental Rotary Encoder – ROD 630 Series
When a precision encoder fails on a CNC machining center or servo-driven axis, the entire production line halts. Positioning accuracy collapses, spindle feedback is lost, and unplanned downtime costs thousands of dollars per hour. The HEIDENHAIN ROD630 900 28S0 is the exact replacement component that restores closed-loop control, eliminates positioning drift, and gets your machine back to full production — without compromise.
Within the ROD 630 family — HEIDENHAIN’s benchmark series for modular incremental rotary encoders — the ROD630 900 28S0 occupies a precision mid-range position with 900 lines per revolution and a 28S0 synchro flange interface. This configuration is widely specified by OEMs across Europe, Asia, and North America for servo motor feedback, rotary table positioning, and high-cycle automation axes. Its global installed base makes it one of the most sought-after encoder part numbers in the industrial aftermarket.
Technical Specifications
- Manufacturer: HEIDENHAIN (Dr. Johannes Heidenhain GmbH)
- Part Number / SKU: ROD630 900 28S0
- Series: ROD 630 — Modular Incremental Rotary Encoder
- Signal Type: Incremental (TTL / HTL square wave output)
- Line Count: 900 lines per revolution
- Mechanical Interface: 28S0 synchro flange (stator coupling)
- Operating Principle: Photoelectric scanning of precision glass scale
- Output Signals: A, B, R (reference pulse) with complementary channels
- Weight: Approx. 180 g
- Compliance: Designed to HEIDENHAIN factory specifications
Note: All specifications are based on HEIDENHAIN published data. Do not rely solely on this page — always verify against the official HEIDENHAIN datasheet for your application.
Key Features & Benefits
- High-Resolution Feedback: 900 lines/rev delivers fine positioning resolution suitable for precision servo axes and CNC contouring.
- Modular Design: The ROD 630 series uses a modular shaft/stator concept, enabling direct motor integration without external bearings.
- Robust Photoelectric Scanning: HEIDENHAIN’s proven optical scanning technology ensures long service life and immunity to magnetic interference.
- 28S0 Synchro Flange: Industry-standard mounting interface for fast, accurate alignment on compatible servo motors and gearboxes.
- Drop-In Replacement: Maintains full electrical and mechanical compatibility with original OEM specifications — no re-parameterization required in most applications.
- Global OEM Acceptance: Specified by leading machine tool builders including Siemens, Fanuc, Mitsubishi, and Bosch Rexroth drive systems.
Industry & Equipment Applications
- CNC Machine Tools: Machining centers, turning centers, grinding machines — axis feedback and spindle orientation
- Servo Motor Systems: Direct encoder replacement on AC/DC servo motors with 28S0 flange interface
- Rotary Tables & Indexing Units: High-accuracy angular positioning in multi-axis fixtures
- Printing & Packaging Machinery: Register control and web tension feedback
- Semiconductor & Electronics Manufacturing: Precision motion stages requiring sub-arc-minute repeatability
- Robotics & Collaborative Arms: Joint position feedback in industrial robot axes
System Integration & Compatible Parts
The ROD630 900 28S0 is designed to interface with HEIDENHAIN-compatible controllers and drives. Typical system partners include:
- HEIDENHAIN TNC / iTNC CNC controllers
- Siemens SINUMERIK 840D / 828D with EXE signal conditioning
- Fanuc Series 0i / 30i / 31i drive systems
- Bosch Rexroth IndraDrive and Indramat servo drives
- Mitsubishi MELSERVO MR-J series amplifiers
Related parts you may also need: ROD 630 mating connectors, HEIDENHAIN PWM 20 signal conditioning modules, and compatible encoder cables (e.g., HEIDENHAIN cable ID 309 784-xx).
Our Quality Assurance Process
- Source Verification: All units are sourced from authorized distributors or verified surplus channels with full traceability documentation.
- Visual & Functional Inspection: Each unit undergoes physical inspection for connector integrity, housing condition, and label authenticity before shipment.
- Secure Packaging: Anti-static packaging with foam cushioning to prevent transit damage to precision optical components.
- Documentation: Certificate of conformity and packing list provided with every order.
How to Order
- Submit an inquiry via the Contact / RFQ form on this page with your required quantity and delivery timeline.
- Our technical team will confirm availability, lead time, and provide a formal quotation within 1 business day.
- Upon order confirmation, we arrange secure export packaging and international logistics (DHL / FedEx / UPS / sea freight).
- Tracking information and shipping documents (commercial invoice, packing list) are provided upon dispatch.
Why Choose Konmask.com?
- ✅ Industrial Automation Specialists: Focused exclusively on PLC, DCS, servo, and encoder components — not a generalist marketplace.
- ✅ Global Sourcing Network: Access to new, surplus, and refurbished stock across Europe, Asia, and North America.
- ✅ Technical Support: Our engineers can assist with cross-referencing, compatibility verification, and installation guidance.
- ✅ Fast Response: RFQ responses within 24 hours; urgent orders prioritized.
- ✅ Trusted by Industry: Serving OEMs, system integrators, and MRO teams worldwide.
Frequently Asked Questions
Q: Is the ROD630 900 28S0 a new or refurbished unit?
A: We supply both new and professionally inspected surplus units. Please specify your preference in the RFQ form and we will confirm availability and pricing accordingly.
Q: Can this encoder replace my existing ROD 630 with a different line count?
A: The 900-line version may not be a direct drop-in if your controller is parameterized for a different resolution. Please consult your drive documentation or contact our technical team before ordering.
Q: What is the lead time for the HEIDENHAIN ROD630 900 28S0?
A: Lead time depends on current stock levels. Submit an RFQ and we will confirm availability within 1 business day. Urgent requirements can often be fulfilled from existing stock.
Q: Do you provide export documentation for international shipments?
A: Yes. We provide commercial invoice, packing list, and certificate of conformity. Additional documentation (e.g., EUR.1, Form A) can be arranged upon request.
Q: What warranty is provided?
A: All units carry a 90-day warranty against defects in materials and workmanship under normal operating conditions. Extended warranty options are available — please inquire.
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