About Us



  • David A. Richardson Grating Laboratory constructed by Bausch & Lomb.
  • Facility built 150 feet below ground level, on bedrock for precision ruling and replicating diffraction gratings.


The 1950s

  • Technology applied to ruling of master linear scales and replication in commercial quantities.
  • Became basis for evolution of optical measuring products line.



  • A master camera was built from which the first 24” master scale was developed by Micro-Line.
  • Much like dark room film processing, master scale acted as the “negative” as light was projected on it. Resulted in a “positive” line image on the mass-produced, chrome-coated glass replicas. Became basis for precision glass scales of today.



  • Micro-Line, located in Jamestown, NY, invented photographic emulsion process for replicating precision patterns.
  • First ever Bausch & Lomb/Micro-Line distributor meeting held at Micro-Line headquarters.
  • Bausch & Lomb acquired Micro-Line.


The 1970s

  • With a solid integrated technology base, the electro-optical positioning system for manual machine tools introduced.
  • In late 1970s, ACU-RITE introduced the Qwikcount digital readout, specifically designed for machine tools needing smaller DRO’s. Used primarily for optical comparators, gauging equipment, grinders, coordinate-measuring tables and inspection machines.



  • Companies combined replication technologies to produce precision chrome line scales.
  • Resulted in development of first truly commercial digital readout (DRO) system.



  • All of Bausch and Lomb’s functions engineering, sales, marketing and manufacturing (except for scale replication and assembly) moved from Jamestown to Rochester.
  • From 1976 to 1980, great effort and financial resources were put into scale replication process in Jamestown to keep up with demand for positioning systems.



  • ACU-RITE introduced the AR II DRO, developed to fulfill need for a quality, reliable digital readout that increased productivity and profitability.



  • Bausch & Lomb lost interest in scientific instrument business. Set business up as stand alone units and sold them off.
  • ACU-RITE introduced the AR III digital readout, developed to reduce positioning time, minimize/eliminate manual calculations, reduce scrap and display true table position.


JH1 1985

  • All operating functions re-established in Jamestown.
  • DR. JOHANNES HEIDENHAIN GmbH acquired Micro-Line from Bausch & Lomb
  • Acquisition brought a new name: ACU-RITE INCORPORATED — a brand name used by Micro-Line for readout systems.



  • METRONICS developed line of geometric readouts known by brand name Quadra-Chek.
  • ACU-RITE unveiled the first CRT-based readout system with advanced features like tool offsets, programming and quick reference tables. CRT-based readouts became known as vision readouts (VROs).
  • ACU-RITE introduced TurnVision, first VRO specifically designed for turning applications.



  • ACU-RITE introduced MillVision, the first VRO specifically designed for milling applications.



  • ACU-RITE constructed new 77,000 square foot facility in Jamestown, NY.
  • Jamestown facility continues to serve as corporate headquarters and manufacturing facility.



  • After successful introduction of first vision readout systems, ACU-RITE made conscious effort to broaden product line.
  • ACU-RITE introduced MillMate and TurnMate readout systems to marketplace.
  • Application-specific digital readout (DRO) systems were affordable solution for cost-conscious consumers.



  • ACU-RITE introduced a redesigned Qwikcount readout to marketplace.
  • Qwikcount readout was compact, economical and simple readout — ideal for grinding applications.



  • ACU-RITE introduced Master line of application-specific readout systems to marketplace.
  • Master series consisted of three application specific models: Master-MP for milling, Master-TP for turning and Master-G for grinding and general purpose applications.
  • ACU-RITE began construction of 10,000-square foot environmental and temperature-controlled clean room.
  • Vibration-isolated equipment and a class 100 clean room environment, maintained with precision temperature control at 20 degrees C ±0.02 degree C, are all computer controlled to ensure process integrity.
  • Clean room housed all-new scale replication equipment — one of a kind in United States. (Became fully operational in 1994.)
  • ACU-RITE added surface mount technology (SMT) to increase quality and throughput of its P.C. board assembly process.
  • Multi-million dollar expenditures made ACU-RITE one of worlds premier manufacturing facilities for electronic products and precision glass scales.
  • ACU-RITE introduced EDMVision, the first VRO specifically designed for EDMing applications.



  • ACU-RITE INCORPORATED received ISO-9001 certification, ensuring its products adhere to most stringent design, qualification, manufacturing and quality standards in industry.
  • ACU-RITE introduced brand new precision glass scale to marketplace known as the MicroScale.
  • MicroScale offered compact design —ideal for cross-slides of lathes, inspection equipment and other applications with limited mounting space.
  • ACU-RITE introduced MILLPWR® 2-axis Control/3-axis Readout system — a versatile, flexible, cost-effective solution to increase the efficiency, productivity and profitability of manual milling machines.



  • ACU-RITE completed construction of a 40,000 square foot addition to the manufacturing and stock room facilities.
  • Multi-million dollar investments made ACU-RITE one of world’s premier manufacturing facilities for electronic products and precision glass scales



  • After a 3-year market study, ACU-RITE introduced complete family of user-defined, application-specific readout systems.
  • Readouts provided greater flexibility, increased efficiency and productivity, easy feature access, better accuracy and improved workpiece quality.
  • Line included: DRO 100 for grinding and general purpose applications, DRO 200 for milling and turning and EDMing, the VRO 300 for milling and turning.
  • ACU-RITE introduced brand new precision glass scale to marketplace known as the ENC-150 – ideal for lathes, mills, grinders and EDM machines.
  • ENC-150 offered superior accuracy, finer resolutions, advanced technology and improved durability and reliability.
  • ACU-RITE unveiled Position-Trac™ technology: a unique feature that answered the need for battery backup by providing a quick reference to last known zero, significantly reducing time-consuming setups after power loss.



  • ACU-RITE’s MILLPWR control system was enhanced and introduced to the marketplace .
  • New MILLPWR was available as 2 or 3 axes readout system and offered many new features and benefits at reduced price.



  • ACU-RITE introduced a long-length travel encoder: the ENC 250.
  • ENC 250’s rugged, thick-walled encoder case was ideal for lathes, boring mills and other large machine tools.




  • ACU-RITE introduced latest additions to family of readout systems: Micro-Line readout systems for Milling and Turning.
  • ACU-RITE introduced MICRO-LINE™ for milling and turning applications, named after the company’s original name.
  • MICRO-LINE provided an affordable solution to basic machining needs without sacrificing performance – a low-cost DRO system that provided high-quality results.
  • MILLPWR once again enhanced to run G-code files from CAD/CAM programs for full 3D contouring as well as ability to translate DXF files directly into program code.
  • Added features made MILL-PWR most accurate CNC milling machine in its class.



  • ACU-RITE proudly introduced its new, modern, state-of-the-art LCD (liquid crystal display) 200S readout for all manual application needs – the first DRO manufacturer to introduce an LCD readout display.
  • ACU-RITE also introduced a new low-end product line, the 100S for milling, turning and grinding. This affordable solution to basic machining needs provided high quality results without sacrificing performance.
  • A new line of precision glass scale linear encoders was also introduced: the SENC50, SENC 150 and ENC 125.
  • The SENC 50 and SENC 150 used state-of-the-art roller bearing technology to give the user accurate feedback on the machine tool application.
  • VUE digital readout was introduced.




  • Completed 20,000-square foot addition for new mechanical workshop.



  • ACU-RITE Companies Inc. merged into HEIDENHAIN CORPORATION.



  • MILLPWR G2  released as an innovative CNC designed for milling applications.
  • The new G2 advertised as “Powerful Easy” since this long-awaited control promised to be the simplest and easiest-to-operate CNC milling control available.
  • New G2 features included USB, networking (server based and peer-peer), solid model graphics and a 12.1″ high-resolution display (1024 x 768) as well as many more.
  • Built on the proven reliability of HEIDENHAIN’s NC Kernel platform, the G2 boasted a 1.4 GHz processor and 2.5 GB of user storage.



  • SENC 150 redesign.



  • New complete family of color Digital Readouts released.



  • Manufacturing moved to Schaumburg, IL.