The MSP feature uses a mechanical system that enables the spindle to deflect slightly in X, Y and Z axes during a collision. A sensor system detects this deflection and stops machine motion before the spindle/spindle bearings are damaged.
Corporate parent GF Machining Solutions guarantees that the MSP feature will prevent spindle damage at travel speeds of 12 m/min. or less. In fact, an M304 code was developed to cap the rapid feed of the linear axes at that rate. Once a new part program is proven out and it is determined that there will be no collisions during the operation, a subsequent M305 code disables the MSP feature and enables the machine to run at normal production speeds.
According to GF, collisions that can damage a machine tool’s spindle are most likely to occur when a new job is being set up or first attempted.
The MSP feature is comparable to the Integrated Collision Protection (ICP) capability that has been available on a sister brand in the GF family, AgieCharmilles wire EDM machines. The system for the wire machines has energy-absorbing, spring-loaded ball-screws on the linear axes and two types of positioning sensors for each axis—a rotary encoder and a glass scale. If the location detected by the rotary encoder and glass scale for a given axis differ by a predetermined amount (meaning a collision is occurring), the system stops machine motion within microseconds before damage occurs.
