The 15-M is a CNC control system designed for milling machines, featuring various series including 15A, 15-B, 15-MB, 15-TB, 15T, 15P, and 15G. It incorporates multiple components such as the CRT display module (A02B-0163-C245) and backboard assemblies like the GE FANUC 15M-MCU20411-001R00 6 SOLT RACK with A350-2000-T724/02 backboard. The system utilizes parameters related to pitch error compensation (e.g., data number 5420) and inclination compensation (specific to 15-M/15-T series). Common operational aspects include M and G code programming, with a range of manuals available covering maintenance, parameters, and troubleshooting. The control system is integral to precise milling operations, with diagnostic features such as LED indicators on the base board to assist in fault detection and maintenance.

GE Fanuc, a joint venture between General Electric and Fanuc (now dissolved), specialised in industrial automation and CNC solutions. Their product range included PLCs, motion controllers, and robotics, supporting precision and efficiency in manufacturing and industrial processes. Many of their solutions are now offered under Emerson and Fanuc.