A learning control device performs a positioning process, a first image capturing process, and a first deviation amount calculating process in which a reference position deviation amount in the horizontal direction between the imaging reference position and a detection mark is derived based on image information captured in the first image capturing process to derive a position adjustment amount from the derived reference position deviation amount, and the learning control device further includes a positioning correcting process in which the position adjustment device is operated to adjust a position of the second learn assist member based on the derived movement adjustment amount when the reference position deviation amount derived in the first deviation amount calculating process falls outside a set tolerance range. A second image capturing process, and a second deviation amount calculating process may be further provided.