Millions of nuts and bolts are projection welded every month! Both on "child parts" used within our own large sub-assemblies as well as for outside customers. We utilize electronic "Misuyoke" of "Poka-Yoke" devices to 100% inspect all nut & stud welded parts. No part can be set into the finished part basket without first passing through this device. Quick-change heads are used when multiple parts are run on one machine. Electronic sensors check to make sure all the fasteners are present and in the correct location. Finished part containers are surrounded by a cage and electronic light beams guard the entrance to the basket to prevent anyone from by-passing the check head device. All "Misuyoke" devices are electronically interlocked back to the weld machines.