Machining 101: how to drill a square hole at home without special tools.
Updated better method here: https://youtu.be/M3Ul-s9_MA0 Make your own homemade broaching tool for "drilling" perfectly square holes in steel. In this…
Destroyed vfd teardown and failure analysis
Troubleshoot and test Variable Frequency Drive. Teardown, and attempted repair of a VFD. This is what replaced a phase converter…