Abstract: An electronic parts automatic mounting apparatus wherein a plurality of removing nozzles are disposed on a removing head portion, and a tipped electronic part held on the suitable removing nozzle is recognized by a recognizing means to correct a deviation in position thereof, whereby mounting accuracy of the part on a print substrate is enhanced and the recognition of the tipped electronic part held by the removing nozzle by the recognizing means can be positively carried out.

Abstract: The present invention discloses a screen printing machine having a position adjusting means for carrying out adjustment of position of a material to be printed having a plurality of alignment marks in a direction of X, Y and .theta.. The adjusting means comprises a placing means for placing and positioning the material to be printed, a means for displacing the placing means in a direction of X and moving and carrying the placing means from a recognition station to a printing station, and a means for displacing the placing means in a directin of Y. The displacing means is composed of a mechanism in which both side portions of the placing means are respectively independently displaced in the direction of Y to make adjustment of positions of the placing means in the directions of Y and .theta..