HEIDENHAIN LF 481 Linear Encoder
HEIDENHAIN LF 481 without and with mounting spar. Catalog photo.
The HEIDENHAIN LF 481 (also written LF481) is a linear encoder. If yours is giving trouble, Automation and Metrology can evaluate it before you commit to a replacement. We work on older encoders, including units that may no longer be available new.
we specialize in machine down linear encoder repair or replacement
How it works: Send us your scale for a free evaluation. We will give you a repair quote quickly, before work starts.
Turnaround: Rush repairs typically take 1-2 days; standard repairs typically take 1-2 weeks. We will confirm the timing for your unit with the quote. If repair is not practical, we can help identify a suitable current HEIDENHAIN replacement.
Catalog specifications
From the HEIDENHAIN Linear Encoders for Numerically Controlled Machine Tools catalog, July 2010. The LF 481 has 1 or 2 fixed reference marks as listed. The LF 481C has distance-coded reference marks; see its own page. Values are catalog values for this model; confirm your unit's configuration from its ID tag.
| Accuracy grade | ±3 µm; ±5 µm |
|---|---|
| Measuring lengths (mm) | 50, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 900, 1000, 1120, 1220 (mounting spar recommended) |
| Reference marks (LF 481) | ML 50 mm: 1 at midpoint; ML 100 to 1000 mm: 2, located 25 mm from the beginning and end of the measuring length; from ML 1120 mm: 2, located 35 mm from the beginning and end |
| Expansion coefficient | 10 x 10-6 K-1 |
| Traversing speed | Up to 30 m/min |
| Required moving force | Up to 5 N |
| Vibration 55 to 2000 Hz | Up to 80 m/s² (IEC 60 068-2-6) |
| Shock (11 ms) | Up to 100 m/s² (IEC 60 068-2-27) |
| Acceleration | Up to 30 m/s² in measuring direction |
| Weight (without mounting spar) | 0.4 kg + 0.5 kg/m measuring length |
| Measuring standard | DIADUR phase grating on steel |
| Incremental signals | About 1 VPP |
| Grating period / signal period | 8 µm / 4 µm |
| Cutoff frequency (–3 dB) | At least 200 kHz |
| Power supply (without load) | 5 V ±5 % / less than 200 mA |
| Electrical connection | Separate adapter cable (1 m/3 m/6 m/9 m) connectable to mounting block |
| Cable length (HEIDENHAIN cable) | Up to 150 m |
| Protection (IEC 60 529) | IP 53 when mounted according to the mounting instructions; IP 64 if compressed air is connected via DA 300 |
| Operating temperature | 0 °C to 50 °C |
Documents
Please send the full model and ID number from the unit's label, plus its measuring length and connector details, so we can check the right configuration. Do not assume a similar model is a drop-in replacement.
Request a Quote Or call 1-888-354-2525.