Digital Readout Systems (DRO kits)


ZS Instruments DR300 Digital Readout Displays and Linear Glass Scales designed, manufactured, and assembled in the USA. Our DRO systems provide up to 3 axis position readout for a milling machine, lathe, horizontal boring mill, surface grinder, OD grinder etc. Advanced functions such as Bolt Hole Patterns, multi-plane Radius/Incline milling, and directional tool compensation, make every day machining tasks easier, increase productivity and reduce defects.

Quality and Reliability

Each ZS Instruments DRO system conforms to the stringent IPC-A-610 class III high reliability requirements for design, assembly and inspection of electronics. DRO Mother boards go through a rigous cleaning process to remove residual flux and other corrosives, and then receive a layer of Conformal Coating, practice common in Military & Aerospace indsutries. This provides a previously unseen level of reliability and guards DRO electronics from hostile environment such as exposure to metal dust, moisture, aggressive vapors, and fungus.

Advanced Optical Technology

ZS Instruments Glass Scales produced under class 100 cleanroom environment and feature Patent Pending sensor technologies. Only optical encoders provide native 5um (0.0002”) resolution without relying on approximation and ensure a consistent level of precision and repeatability over the entire lifespan. In addition, compared with magnetic and/or inductive technology, glass scales are not affected by presence of metal dust and external magnetic fields.

User Centered Interface

Clear and unambiguous LED position display is know nas the #1 choice among PROFESSIONAL machinists for its bright, high contrast readout under all lighting conditions, while our auxialry LCD display provides interactive prompts for enhanced user experience

Dont compromise quality for a price

ZS instruments is an innovative high tech company founded at Purdue Research Park West Lafayette Indiana. We offers industry leading performance at price up to 30% lower than competition. Ran a forklift into your scale or wound the cable on a lathe chuck? Not a problem, our repalcement scales can be also pruchased directly and at a fair price! Learn More…

Available with 2 styles of Mounting Arms

Mill Mounting Arm Lathe Mounting Arm

Straight Arm allows for easy mount to the Ram of the Mill, while L-shaped design atatches to the lathe gearbox and brings DRO display closer to the operator.

Essential Features

ZS Instruments DRO displays always come with full 3 axis capabilities, regardless of number of scales purchased with the kit. 2nd and 3rd axis can be easily disabled or reanabled in the settings menu. Interchanging betwee nmachine is made easy - all of our dispalys are also UNIVERSAL, with user selectable Mill or Lathe functionality.

Milling, Boring, Drilling:
  • Center find
  • Bolt Hole Circles, Linear Hole Patterns and Hole Arrays
  • Radius & Incline machining in any plane: XY, XZ or YZ
Milling, Boring, Drilling:
  • Center find
  • Bolt Hole Circles, Linear Hole Patterns and Hole Arrays
  • Radius & Incline machining in any plane: XY, XZ or YZ
  • Radius/Diameter mode
  • Taper measurement
  • Full vector axis summing with compound angle option
  • Feedrate display in either mm/s or inches per minute (ipm)
  • 99 tool library with diameter & offset compensation
  • 99 programmable sub datum point
  • Last Position Recall mode
  • Selectable number of decimal points
  • Calculator with sin/cos functions
  • Power independent memory
  • Power loss zero restore
  • LCD Backlight On/off
  • Sleep mode
  • USB Firmware upgrade
  • Universal 100-240V power