countable noun. If an electronic measuring device gives you a readout, it displays information about the level of something such as a speed, height, or sound. The system provides a digital readout of the vehicle's speed. [

How does a digital readout work?

Digital Readouts (DRO's) utilize linear scales mounted to the cross-slide and carriage axis of the lathe. The scale reads position independent of the lead screw and shows the true tool position, regardless of mechanical wear and backlash.

What is DRO in milling machine?

Digital Readout (DRO) Systems are used for indicating the position of the cutting tool relative to a workpiece. The positions are detected by encoders mounted on the axis. They feature a numeric display and keyboard. DRO systems are used with milling and boring machines, lathes and surface grinders.