A CNC machine tool operator control panel interface board that connects to the CNCPC via a USB port. The Operator Control Panel Interface Board is intended to be an affordable, reliable, alternative to traditional methods of building CNC control operator control consoles/panels. The USB-BOB provides inputs for the most commonly used operator controls in a package that installs quickly with minimal fuss saving on wiring/installation labor and CNC controller inputs. It features inputs for three standard rotary encoders with integrated push-button, three MPG hand-wheel encoder inputs, 12 optically isolated switch inputs, and 12 open collector LED outputs. The USB-BOB can be used in conjunction with Centroid’s popular Virtual Control Panel or without. Centroid "USB-BOB" kit (#15380) includes: 1x Centroid USB Operator Control Panel board 3x Feed Knob Assemblies with cables 3x 10-pin Terminal Blocks 4x 5-pin Terminal Blocks 1x 6' Right-Angled USB to Micro USB Cable 4x 6-32x1/2" Standoffs 4x 6-32x3/8" Screws 4x 6-32 Lock Washers