(of a machine or operation) acting without external influence or control; automatic.
〈古〉（机器，操作）自动的
this being a self-acting incline the empty trucks were dragged up by the full ones
Example sentencesExamples
Precision manufacture of interchangeable parts led to greater and greater division of labor and the invention of self-acting machines that could be operated by workers with less training and experience than traditional craftsmen.
After 1825, when the self-acting mule spinner automated the process, spinning 100 pounds of cotton took 135 hours.
Definition of self-acting in US English:
self-acting
adjectiveˈˌself ˈaktiNG
archaic
(of a machine or operation) acting without external influence or control; automatic.
〈古〉（机器，操作）自动的
this being a self-acting incline the empty trucks were dragged up by the full ones
Example sentencesExamples
After 1825, when the self-acting mule spinner automated the process, spinning 100 pounds of cotton took 135 hours.
Precision manufacture of interchangeable parts led to greater and greater division of labor and the invention of self-acting machines that could be operated by workers with less training and experience than traditional craftsmen.