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Industrial maintenance training

From tech to master

Complete, hands-on mastery courses for PLC, CNC and robotics maintenance. Written by a working technician, for working technicians. They take a base-level maintenance tech to subject matter expert.

See the coursesRead a free sample
  • Written by a working technician
  • Pay once, own it for good
  • Read on any device
  • Honest assessments, no certification hype
Tech to Master logo: the letters T, T and M under a gear, wrapped in electric lightning

The path

Level up, one step at a time

Three courses take you from the tech who knows the panel to the person the plant calls first.

  1. Step 01

    Maintenance technician

    You know your way around a panel, a meter and a down machine.

  2. Step 02

    Controls troubleshooter

    You find the fault in the PLC, the drive or the robot, and fix it the first time.

  3. Step 03

    Subject matter expert

    The person the plant calls first, and the one who trains the next tech.

PLCCNCRobotics

Three courses. One path.

Each course is a complete training manual: a full course of study, a reference you will open again on a breakdown call, and a guide to the platforms you actually have in your plant.

Edition 1.0, September 2026

PLC Maintenance Mastery

Find the fault when it lives in the controls.

A complete course in PLC systems for the maintenance technician who already knows a panel, a meter and a down machine. It runs from relay logic to troubleshooting, maintaining and protecting PLC systems on Allen-Bradley, Siemens and Schneider Electric platforms.

71 chapters in 16 Parts289 diagrams284 Knowledge Checks236 Review Questions195 worked solutions289 Final Assessment questions in the pool
from $199 View course
Training manual

CNC Maintenance Mastery

Keep the machines cutting.

A complete course in CNC machine maintenance: mechanical systems, electrical and control systems, spindles, drives and feedback, preventive and predictive maintenance, troubleshooting, repair and calibration.

45 chapters in 11 Parts30 deep-dive chapters100+ diagrams30+ photographs
from $199 View course
Training manual

Robotics Maintenance Mastery

Keep the cells running.

A complete course in industrial robot maintenance: safety and lockout for robotic cells, controllers, servo drives and motors, mechanics, end-of-arm tooling, programming for maintenance, networking, preventive maintenance and troubleshooting.

58 chapters in 11 Parts5 deep-dive chapters6 appendices100+ diagrams50+ photographs
from $199 View course

How it works

  1. Choose your course

    Pick the manual you need. Buy it once to own it, or subscribe to read them all. Companies can license a manual for the whole team.

  2. Check out securely

    Payment runs through Stripe. We never see or store your card. Your account is created from your email and you set your own password.

  3. Log in and learn

    Read online on any device. Work the Knowledge Checks and exercises, and your progress saves to your account.

Built for the job, not the brochure

Every manual is written to be studied, and then opened again when something is down and the supervisor is waiting. Safety comes first, and the troubleshooting is something you can use on the floor.

  • Safety first. The PLC manual tells you to read its safety chapter before anything else.
  • Hands-on exercises with worked solutions, so you can check your own work.
  • Knowledge Checks that explain themselves. Every wrong answer has a reason, so a miss teaches you something.
  • An honest assessment. A Final Assessment and a Course Completion Document for your own records, not a certification.
  • Permanent licenses. Buy a manual once, keep it, and get updated editions at no extra cost.

From the author

Erick T. Colunga is an Electronics and CNC Technician with more than 13 years in the trade. Over those years he has worked alongside, and learned from, many tradespeople with more than 20 years of experience.

He wrote these manuals to pass that kind of knowledge on to technicians who already know their way around a panel, a meter and a down machine.

More about the manuals and the author

Your choice

Own it, or rent it

Most technicians buy the manual they need and keep it. If you would rather read across all of them for a while, the monthly plan is there.

Compare options

Individual license $199

One named person. Permanent. Print for your own use.

Business license $999

Unlimited employees and contractors of one company, for internal training.

Monthly subscription $39/mo

Read every manual online. No printing. Cancel any time.

Common questions

Is this a certification?
No, and we are plain about that. The PLC manual ends with a Final Assessment. If you pass, you can print a Course Completion Document for your own records. It says what you know. It is not a certification, and it is not issued by any standards body. Hands-on skill is shown on the skills sign-off sheet in the capstone, signed by someone who watched you do the work.
Who are these courses for?
Maintenance technicians who already know their way around a panel, a meter and a down machine. You do not start from zero. You bring the basics: hand tools, a multimeter and sound electrical skills. The manuals build subject-matter-expert knowledge on top of them. Field experience completes the journey.
Do I buy once, or pay every month?
Both work. Buy a manual once and the license is permanent: updated editions are included at no extra cost, and you may print for your own use. Or take the monthly subscription to read every manual online. The subscription is read-only: no printing, and access ends when it does.
Can my company buy it for everyone?
Yes. A Business License covers any number of employees and contractors of one company for internal training. Each person gets their own login, and the company manages who is on the list.
How do I read it?
In your browser, on a computer, tablet or phone. Log in, open the manual, and your quiz answers and place are saved to your account, so they follow you from device to device.

More answers in Help, or write to us.