An audiotape or videotape transport, projector or mag film dubber whose movements follow the movement of a single master transport. Accomplished electronically by using SMPTE time code numbers or mechanically by motor linkage of sprocketed machines.
Master/slave is a model of communication where one device or process has unidirectional control over one or more other devices. In some systems a master is selected from a group of eligible devices, with the other devices acting in the role of slaves.
In the context of motor control, the master/slave configuration is used for load sharing purposes when two identical motors connected to two different drives are coupled to a common load. One drive is defined as the master and is configured for running in the speed-control mode whereas the other defined as slave is configured for running in torque-control mode.