A service mounter having a conveyor along which substrates are moved in an X direction. A plurality of mounters are mounted for movement in the X direction on opposite sides of the conveyor and pick up work pieces from feeders disposed on the sides of the conveyor. Operating sections are supported for movement on opposite sides of the conveyor along a Y axis and are adapted to receive substrates from the conveyor and position them relative to the mounters to receive the work pieces. An improved mounter construction is also disclosed that includes a servomotor to adjust the height to accommodate for variations in thickness and the various components manipulated.