{"id":2497,"date":"2026-04-24T08:00:21","date_gmt":"2026-04-24T00:00:21","guid":{"rendered":"https:\/\/jtlcnc.com\/?p=2497"},"modified":"2026-04-24T08:00:24","modified_gmt":"2026-04-24T00:00:24","slug":"how-to-choose-a-suitable-laser-interferometer-to-inspect-the-accuracy-of-a-granite-platform","status":"publish","type":"post","link":"https:\/\/jtlcnc.com\/ar\/2026\/04\/24\/how-to-choose-a-suitable-laser-interferometer-to-inspect-the-accuracy-of-a-granite-platform\/","title":{"rendered":"How to choose a suitable laser interferometer to inspect the accuracy of a granite platform?"},"content":{"rendered":"

Laser Interferometer Dedicated for Granite Platforms | Comprehensive Selection Guide (Universal fo Grade 000\/00\/0)
Select based on 5 core dimensions: platform accuracy grade, table size, workshop environment, inspection items, and national standard traceability. Directly matches ite flatness \/ straightness \/ perpendicularity 3D inspection.<\/p>\n\n\n\n

I. Determine the Core First: Single-Frequency vs. Dual-Frequency Laser (Must Choose Dual-Fy)<\/p>\n\n\n\n

    \n
  1. Single-Frequency Laser Interferometer
    Accuracy: \u00b11ppm, Resolution 0.01\u03bcm
    Poor anti-interference: Drifts due to tempere drift, air currents, and slight vibrations
    Only suitable for: Constant temperature dust-free laboratories, small tables Grade 0 and below, static calibration
    \u274c Not recommended for on-site workshop met of granite platforms<\/li>\n\n\n\n
  2. Dual-Frequency Laser Interferometer (Standard for granite inspection \u00b7 Similar to Renishaw XL-80)
    Accura, Resolution 0.6nm
    Extremely strong heterodyne anti-interference, no drift from air conditioning, workshop vibrations, or temperature fluctuations
    No cumulative error over lones, suitable for large granite bases \/ gantry tables
    \u2705 The only first choice for factory calibration of Grade 000\/00 platforms and CMA metrology arbi<\/li>\n<\/ol>\n\n\n\n

    II. Select Instrument Grade Based on Granite Platform Accuracy Grade
    \u0627\u0644\u062c\u062f\u0648\u0644<\/p>\n\n\n\n

    Granite Platform Grade<\/th>Flatness Requirement<\/th>Minimum Laser Interferometer Configuration<\/th><\/tr><\/thead>
    Grade 000 (Semiconductor \/ CMM Reference)<\/td>\u22642\u03bcm\/m<\/td>Nanometer-level dual-frequency angular flatness accessory full grid 3D fiting<\/td><\/tr>
    Grade 00 (Optical \/ Ultra-high Precision Fixtures)<\/td>\u22645\u03bcm\/m<\/td>High-precision dual-frequency, angular interferometer module<\/td><\/tr>
    Grade 0 (Workshop Precisio Inspection)<\/td>\u226410\u03bcm\/m<\/td>Standard dual-frequency straightness angle combination<\/td><\/tr>
    Grade 1 and below<\/td>\u226515\u03bcm\/m<\/td>Electronic level isfficient, no laser needed<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    III. Select Measurement Range & Bridge Configuration Based on Table Size
    \u22641500mm Small Platforms
    Range: 0~4m is suffiient
    Bridge: Standard 150\/200mm pitch
    1500~3000mm Medium Platforms \/ Machine Tool Beds
    , prioritize angular interferometry method, no cumulative error over long distances
    Extended bridge long-distance retroreflector assembly<\/p>\n\n\n\n

    \n

    3000mm Large Gantry \/ Granite Beams
    Range: 0~15m , Angular laser interferometry
    Pair with laser tracker to verify overall plane cloud map<\/p>\n<\/blockquote>\n\n\n\n

    IV. Must Equip with Granite-Specific Inspection Aessories (No exceptions allowed)
    Angular Interferometer Set (Core for flatness)
    Measures table tilt and undulation \u2192 converts to full plane height difference, dedicated for national sandard JJG117 plate calibration
    Flatness Scanning Bridge Granite-Specific Retroreflector
    Conforms to stone mirror surface, does not scratch working surface, moves smoothly without vibrationTemperature, Humidity, and Air Pressure Compensation Module
    Granite is sensitive to thermal expansion, automatically corrects temperature \/ air pressure \/ air refractive index errors
    OrthogonalAngle Mirror Set: Simultaneously measures perpendicularity, parallelism, and position
    Grid Flatness Software: Cross diagonal full-area sampling, least squares evaluation, outp error cloud map<\/p>\n\n\n\n

    V. Workshop Environment Adaptation Selection (Key to stable readings on-site)
    Constant Temperature Dust-Free Workshop (20\u00b10.5\u2103): Any dual-freques acceptable
    Ordinary Production Workshop (with vibration, direct AC airflow)
    Must select: High-stability dual-frequency strong environmental compensation wireless acquisition, isolates air current and vibration nterference
    Humid and Dusty Environment: Select sealed optical mirror set, oil-proof coating, protects laser beam path<\/p>\n\n\n\n

    VI. Key Technical Parameter Hard Thresholds (Must be met for Grade 00 Granite or above)
    Laser frequency stabilization accracy: \u2264\u00b10.05ppm
    Angular resolution: \u22640.001\u2033 (arcseconds), corresponding height difference 0.001\u03bcm\/m
    Repetability: \u22640.1\u03bcm, no deviation in multiple re-measurements
    Complies with JJG117 and GB\/T4987 granite surface plate verification regulati; capable of issuing CNAS\/CMA calibration certificates
    Helium-neon stabilized light source, wavelength 632.8nm, long-term stability, no attenuation ovr time<\/p>\n\n\n\n

    VII. Mainstream Model Selection (Industry Standard)
    Imported High-End (Grade 000 Arbitration \/ CMM Acceptance): Renisha80
    Full form and position measurement, top-tier anti-interference, software adapted to national standards, traceable to national benchmarks
    Domestic High Precision (Factory mass production verification cost-effectival-frequency laser full set of planar angle modules
    Meets accuracy standards, fast after-sales service, moderate price, suitable for batch inspection of Grade 00\/0 granie platforms
    Not Recommended: Low-end single-frequency, short range, no angle module, no dedicated flatness algorithm<\/p>\n\n\n\n

    \"\"<\/figure>","protected":false},"excerpt":{"rendered":"

    Laser Interferometer Dedicated for Granite Platforms | Comprehensive Selection Guide (Universal fo Grade 000\/00\/0)Select based on 5 core dimensions: platform accuracy grade, table size, workshop environment, inspection items, and national standard traceability. Directly matches ite flatness \/ straightness \/ perpendicularity 3D inspection. I. Determine the Core First: Single-Frequency vs. Dual-Frequency Laser (Must Choose Dual-Fy) II….<\/p>","protected":false},"author":1,"featured_media":2500,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[35],"tags":[],"class_list":["post-2497","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"taxonomy_info":{"category":[{"value":35,"label":"NEWS"}]},"featured_image_src_large":["https:\/\/jtlcnc.com\/wp-content\/uploads\/2026\/04\/\u5fae\u4fe1\u56fe\u7247_20260420143653_86_25.png",709,888,false],"author_info":{"display_name":"jinxing6611@gmail.com","author_link":"https:\/\/jtlcnc.com\/ar\/author\/jtlcnc\/"},"comment_info":0,"category_info":[{"term_id":35,"name":"NEWS","slug":"news","term_group":0,"term_taxonomy_id":35,"taxonomy":"category","description":"","parent":0,"count":155,"filter":"raw","cat_ID":35,"category_count":155,"category_description":"","cat_name":"NEWS","category_nicename":"news","category_parent":0}],"tag_info":false,"_links":{"self":[{"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/posts\/2497","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/comments?post=2497"}],"version-history":[{"count":1,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/posts\/2497\/revisions"}],"predecessor-version":[{"id":2501,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/posts\/2497\/revisions\/2501"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/media\/2500"}],"wp:attachment":[{"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/media?parent=2497"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/categories?post=2497"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/tags?post=2497"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}