{"product_id":"heidenhain-lif-400-v-vacuum-incremental-linear-encoders","title":"HEIDENHAIN LIF 400 V Vacuum Incremental Linear Encoders","description":"\u003cp\u003eThe HEIDENHAIN LIF 400 V series is an exposed incremental linear encoder for high-vacuum applications. LIF 471V provides TTL signals; LIF 481V provides 1 VPP signals. Both use an LIF 401 R scale with SUPRADUR phase grating. Integrated homing and limit tracks support referencing and end-position detection.\u003c\/p\u003e\n\u003ch2\u003eTechnical Data\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum models:\u003c\/strong\u003e LIF 471V (TTL) and LIF 481V (1 VPP)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScale:\u003c\/strong\u003e LIF 401 R; SUPRADUR phase grating on Zerodur glass ceramic or glass; 8 µm grating period\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy grade:\u003c\/strong\u003e ±3 µm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBaseline error:\u003c\/strong\u003e no more than ±0.225 µm per 5 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasuring lengths:\u003c\/strong\u003e selected lengths from 70 mm to 1640 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference mark:\u003c\/strong\u003e one at the midpoint of the measuring length\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog signal period:\u003c\/strong\u003e 4 µm for LIF 481V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTTL signal periods:\u003c\/strong\u003e 0.8, 0.4, 0.2, 0.08 or 0.04 µm, depending on the LIF 471V interpolation option\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasuring steps:\u003c\/strong\u003e applications down to 2 nm, subject to interface and downstream electronics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTraversing speed:\u003c\/strong\u003e up to 240 m\/min for 1 VPP; TTL limits range from 3 to 120 m\/min depending on interpolation and scanning frequency\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTTL referencing speed:\u003c\/strong\u003e maximum 9.6 m\/min (40 kHz)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog interpolation error:\u003c\/strong\u003e ±12 nm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog RMS position noise:\u003c\/strong\u003e 0.6 nm at a 1 MHz cutoff frequency of the subsequent electronics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupply voltage:\u003c\/strong\u003e 5 V DC ±0.25 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent:\u003c\/strong\u003e less than 150 mA for 1 VPP; less than 165 mA for TTL, without load\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating temperature:\u003c\/strong\u003e 0 °C to 50 °C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBake-out temperature:\u003c\/strong\u003e 100 °C for the V variants\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum cable length:\u003c\/strong\u003e 30 m for incremental signals; 10 m for homing and limit signals, with the specified cable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScanning-head mass:\u003c\/strong\u003e 9 g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eVacuum configuration\u003c\/h2\u003e\n\u003cp\u003eThe vacuum-compatible variants include air vents, specialized cleaning and packaging, and a cable with PTFE insulation and tin-plated copper braiding. The high-vacuum V variants are offered with interface electronics either inside or outside the vacuum. Confirm the feed-through, connector and cable arrangement for the installation. For low outgassing, the product information recommends baking at 100 °C for 48 hours under high-vacuum conditions.\u003c\/p\u003e\n\u003cp\u003eThe related LIF 481U is an ultrahigh-vacuum variant with a 120 °C bake-out limit and interface electronics outside the ultrahigh vacuum. Its vacuum-side encoder must not contain electronic components such as signal converters. Do not substitute the V variant for a U configuration without checking the vacuum requirements. Bake-out temperatures are not continuous operating temperatures.\u003c\/p\u003e\n\u003ch2\u003eDocuments\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/docs.auto-met.com\/8-HEIDENHAIN-LIF400V.pdf\" target=\"_blank\" rel=\"noopener\"\u003eLIF 471V \/ LIF 481V \/ LIF 481U product information (March 2024)\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eMachine down? Ask about expedited repair or replacement options. Include the complete encoder ID, measuring length, signal interface and vacuum setup so we can identify the right replacement.\u003c\/p\u003e","brand":"HEIDENHAIN","offers":[{"title":"Default Title","offer_id":67661720420669,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1021\/8222\/4189\/files\/9-HEIDENHAIN-LIF400V-white_4ec5e4bc-2c05-4c7a-a5b6-9054aec99659.png?v=1791606822","url":"https:\/\/auto-met.com\/products\/heidenhain-lif-400-v-vacuum-incremental-linear-encoders","provider":"Automation and Metrology, Inc.","version":"1.0","type":"link"}