The author
Erick T. Colunga is an Electronics and CNC Technician with more than 13 years in the trade, and the owner of UrWrench LLC. He is one of the subject matter experts who review these manuals. Over those years he has worked alongside, and learned from, many tradespeople with more than 20 years of experience.
He wrote the manuals to pass that kind of knowledge on to technicians who already know their way around a panel, a meter and a down machine, and who want to grow into the person the plant calls first.
What the manuals are
Three complete training manuals, PLC Maintenance Mastery, CNC Maintenance Mastery and Robotics Maintenance Mastery. Each is a course you can study, a reference you will open on a breakdown call, and a guide to the platforms you will meet.
How they were made
The manuals were developed with the help of AI tools for research, drafting and technical verification. All content has been reviewed and validated by subject matter experts with hands-on industrial maintenance experience. If you find an error, tell us at support@urwrench.com. Corrections go into updated editions, and license holders get those at no extra cost.
Safety
The information is provided for educational purposes. Always follow your facility's safety procedures, lockout/tagout requirements and the manufacturer's guidelines. Electrical and machine work involves energized equipment and moving parts, and improper procedures can result in serious injury or death.