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Session Listing

Handy links to all the subjects we cover.

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21 Electrical Sessions



Basic Electrical Concepts

4 Learning Materials

When studying electrical circuits, you need to start with the fundamentals: Voltage, Current, and Resistance. Take your learning further with a look at Work and Power, and brush up on the common units and prefixes.

CAN Bus

5 Learning Materials

Ready to learn about the CAN Bus Protocol? We'll get you started with a beginner's guide to the purpose and structure of a high-speed CAN network.

Connectors

4 Learning Materials

Welcome to the session on electrical connectors. In here, you'll start with basic details like what connectors are and how they work, see how to identify the jack/plug and male/female ends, and get a handle on the variety of connectors used for power, data, signal, and control.

Diodes

5 Learning Materials

Learn to use your multimeter to test a diode. This session breaks diodes right down to the sub-atomic level to explain their function.

Electrical Hazards & Safety

3 Learning Materials

Even low voltage systems can seriously injure or even kill. Learn some of the fundamentals of electrical safety, and walk through a scenario on creating a zero energy circuit efficiently and safely.

Electrical Measurements

5 Learning Materials

Digital Multimeters (DMM) are one of the most powerful tools available to electricians. When you learn to use them strategically, they give you the ability to rapidly hone-in on faults.

Flow Sensors

7 Learning Materials • Updated 2 months ago

Both the electromagnetic flow meter and the mass flow meter measure flow without adding a turbine or a restriction to the mix. Check out the full-color lessons in this session to learn how they operate, and why they are so popular!

Fuses & Circuit Breakers

2 Learning Materials

This mini-session gives you a quick overview of these critical circuit protection devices. The theory behind how they work is pretty simple, but there are a handful of varieties that are worth knowing about.

Interpreting Electrical Schematics

4 Learning Materials

Schematics don't need to be confusing! This session explains common drafting practices to upgrade your schematic reading skills.

Open & Short Circuit Faults

8 Learning Materials

In this session, you'll apply electrical principles to troubleshooting. Learn to combine meter readings with simple formulas to locate and identify electrical faults.

Position Sensors

22 Learning Materials

Magnetic, Hall Effect, Inductive, Capacitive, Photoelectric, Magnetostrictive and Ultrasonic proximity, speed and position sensors are covered in this session. Learn about the strengths and weakness of each sensor type, and how each type is uniquely suited to different environmental conditions and sensing challenges.

Pressure Sensors

10 Learning Materials

Pressure sensing can be done with one of several kinds of technologies. This session gets in depth about variable capacitance sensors, strain gauges, and piezoelectric sensors, as well as some general pressure concepts.

Relays

12 Learning Materials • Updated 3 months ago

Relays are demystified in this interactive lesson. Animations and 3D art combine to illustrate the inner workings of common relays, and mutliple schematic variations are explained.

Resistors

5 Learning Materials

Potentiometers vs. rheostats - do you know the difference?

Semiconductors

3 Learning Materials

Transistors are the focus of this session, plus you'll learn how to prevent damage to these sensitive components. BJT and FET transistors are examined, and JFETs are discussed as well.

Sensor Basics

16 Learning Materials • Updated 28 days ago

Sensors are everywhere in our electrical world! Sensors, Transmitters, and Transducers gets you started with a colourful look at these three components, and how they work together as part of a control loop.

Series & Parallel Circuit Basics

11 Learning Materials

Series and parallel circuits are at the heart of every electrical system. Learn how to use Kirchoff's Law to troubleshoot both types of circuit and to predict voltage through loads and branches.

Starting & Charging Systems

3 Learning Materials

Dig into mobile electrical circuits with this session on starting and charging systems. Learn more about the connected roles of the alternator, battery, equalizer, and the starter in getting the engine to rotate and start.

Switches

14 Learning Materials

Switches are one of most common control elements used in electrical circuit design. Brush up on your knowledge with an engaging lesson on switch principles and vocabulary supported by multiple animations and puzzles.

Temperature Sensors

13 Learning Materials

At the most basic level, temperature sensors tell you something really simple: hot, or not? But when you dig down and look at what it takes to make this measurement, you'll find a surprising depth of complexity.

Waveforms & Signal Generation

9 Learning Materials

Direct current is common in low voltage systems, but as soon as you start working with high voltage, you'll need to know about alternating current. AC comes in a variety of waveforms, with a lot of information encoded into it, which we will show you how to identify, measure, and reason about.

27 Hydraulics Sessions



Cartridge Valves

10 Learning Materials • Updated 1 month ago

In this session you'll find an in-depth introduction to slip-in, and also screw-in cartridge valves. Rich 3D animations and simulations will help you gain understanding about how they work, as well as when and why they are used.

Counterbalance Valves

12 Learning Materials

Counterbalance valves allow raised loads to be lowered safely, with a minimum of wasted energy. The Counterbalance Valves lesson provides a thorough look inside the valve, and valuable information on how it functions, as well as important safety and maintenance tips.

Cross-Port Relief Valves

5 Learning Materials

Cross-port relief valves expand on the standard relief valve to control otherwise destructive pressures created by external forces acting against an actuator. Learn all about them in this session, and put their system-saving functionality to the test with interactive examples!

Directional Control Valves

30 Learning Materials

This session is absolutely packed with fun lessons and interactive animations! Follow a rigorous troubleshooting process to solve a directional control valve problem, and dissect a 3 section (pilot operated, solenoid controlled) valve.

Electro-Hydraulic Valves

13 Learning Materials

Enter the world of electro-hydraulic valves in this session! Here we will go over the ways in which electronics are used to increase the capabilities of hydraulic valves to a whole new level.

Fixed Displacement Pumps

10 Learning Materials • Updated 1 month ago

If you have questions about hydraulic pumps, this is the session for you! This session gives you an introduction to the different types of hydraulic pumps and will focus mainly on fixed displacement pumps.

Flow Control Valves

22 Learning Materials

This session focuses on valves that modify flow in your hydraulic system. Learn how a simple needle valve can be used as a speed control, and when you might choose to upgrade to a pressure compensated flow control.

Fluid Power Basics

11 Learning Materials • Updated 14 days ago

If you're looking for the starting point in your study of hydraulics, this is it! This session explains some of the fundamental concepts and principles that hydraulic systems are built upon.

Hydraulic Accessories

18 Learning Materials

This session covers a handful of hydraulic accessories. Lessons cover accumulators, thread identification, quick couplers and hose selection.

Hydraulic Actuators

19 Learning Materials

Linear and rotary actuators are the muscles of a hydraulic system. Lessons cover both styles of actuator, and apply the Ten Step Troubleshooting Process to a cylinder drift problem.

Hydraulic Hazards & Safety

3 Learning Materials

Safe working habits around hydraulic systems save lives. This lesson identifies common hazards, including heat, flammability, pinch points, hose and fitting failures, dangerous system adjustments, and unexpected motion.

Hydraulic Schematic Symbols

10 Learning Materials

Schematic symbol reading is a vital troubleshooting skill. This session is full of lessons and puzzles to build your symbol vocabulary, and to teach you skills for understanding a symbol even if you've never encountered it before.

Hydraulic Steering

6 Learning Materials

This session will go into detail on hydraulic power steering and how it works. The lesson will take you on a tour of the intricate orbitrol valve and introduce you to the inner workings of the valve and its applications.

Hydrostatic (Closed Loop) Systems

20 Learning Materials

Get right into the design of closed loop systems with colourful graphics and detailed drawings. Animations walk you through the important features of closed loop systems, with support from a printable workbook that challenges the depth of your closed loop knowledge.

Load Sensing Pumps & Valves

23 Learning Materials

This animated and interactive session takes the mystery out of load sense! You'll get a front row seat to the internal workings of a piston pump as it responds to lower and higher loads.

Maintenance

2 Learning Materials

Hydraulic systems perform more reliably and last longer when the fluid is kept clean. Filtration and contamination discusses the different types of contamination, how the oil becomes contaminated and how to code contamination using ISO 4406.

Open & Closed Center Systems

8 Learning Materials

This session tackles the differences and similarities between open and closed center systems. Open and closed loop systems are illustrated and examined.

Parallel & Series Systems

16 Learning Materials

Parallel and Series circuits behave very differently. Unexpected flow paths are often at the root of hydraulics system problems; learn to predict fluid behaviour in both types of circuits.

Pilot Controllers

3 Learning Materials

Whether you're using a joystick to raise or swing a boom, or floor pedals for forward or reverse track motion, you're interacting with a pilot controller. These devices have small diameter ports and hoses, so they're not big conductors of flow.

Positive & Non-Positive Pumping

13 Learning Materials

Positive and Non-Positive Pumping tackles the differences between the two types of systems, and the design and maintenance needs of each. Cavitation and aeration are addressed as special concerns, and become part of a larger discussion about the importance of good system design.

Pressure & Flow

21 Learning Materials

This session gets you started with a solid foundation on pressure and flow basics. A precise understanding of how pressure and flow are created, and how they interact within a hydraulic system is absolutely essential for higher level hydraulic understanding.

Pressure Reducing Valves

9 Learning Materials

Pressure reducing valves function very differently than relief valves, even though their schematic symbols look very similar. Learn all about basic valve functionality in a colourful lesson.

Pressure Relief Valves

30 Learning Materials • Updated 3 months ago

Jump into relief valves with this colorful session! Lessons walk you through the fundamentals of direct acting and balanced, pilot operated relief valves, as well as some basic relief valve concepts and vocabulary.

Sequence Valves

8 Learning Materials

Sequence valves are used on many machines to coordinate hydraulic functions. This session examines their design and working principles.

Troubleshooting Processes

11 Learning Materials

Troubleshooting a hydraulic system can be a demanding and tricky task. This session's lesson shares the technique our hydraulics experts have spent their careers refining.

Unloading Valves

7 Learning Materials

Unloading valves are often confused with relief valves, but they play a unique role in hydraulic systems. This session illustrates the similarities and differences between unloading and relief valves, including energy savings and reduced demand on the prime mover.

Variable Displacement Pumps

31 Learning Materials • Updated 2 months ago

This session is full of lessons on variable displacement style pumps, and includes multiple cutaways, 3d renders and interactive animations for you to manipulate and learn with. Simple but essential concepts, such as the way the swash plate and rotating group work together to produce flow, are provided as detailed videos and animations.

5 Machinery Sessions



Electrical Training Panel

7 Learning Materials

This session is a collection of simulations that mimic the circuits students create and run on the CDIG Series 20 Electrical Training Panel. If you have an Instructor account, you will also be able to access the faulted versions of these activities.

Hydraulic Governors

3 Learning Materials

The governor is a critical component in hydroelectric dams. The Governor Basics lesson gives you an overview of what a governor is and how it works, with a few activities to make sure you see how it all fits together.

Hydraulic Training Panel

23 Learning Materials

This is a collection of simulations that mimic the hydraulic systems students create and run on the CDIG Series 18 Hydraulic Training Panel. If you have a different training panel, you may still find these activities and simulations useful.

Lube Systems

2 Learning Materials

Keeping bearings and gears lubricated in a production environment often involves a pumped lubricant. Lube systems are usually based around standard hydraulic components but with a maximum pressure no higher than 100 PSI (7 Bar).

Machine Shop

1 Learning Material

Learn more about common hydraulic systems found around machine shops.

16 Mobile Sessions



Aerial Work Platforms

3 Learning Materials

The world of the aerial work platform (AWP) or the mobile elevated work platform (MEWP) includes a group of machines that are very popular in construction and building maintenance. The scissor lift is the first simulation in this session.

Agriculture

5 Learning Materials

Hydraulic systems are everywhere in agriculture! This session will crack open some common applications, including PTO clutch engagement.

Air Compressors

4 Learning Materials

This session is an introduction to some mobile pneumatic system basics. Learn about the inner mechanics of piston compressors and air governors and how they work together.

Blast Hole Drills

15 Learning Materials • Updated 7 days ago

This session gets you right into the hydraulic circuit sections in a common blast hole drill. You can work with the pump pressure, diverter and brakes, or get into the propel and drill functions.

Civic Machines

8 Learning Materials • Updated 3 months ago

Refuse and recycling trucks, along with snow plows for roads and runways, are examples of machines specific to civic service. Requirements for low noise, or for a plow edge to be gentle against the road surface, are a few of the design and function challenges faced by the makers and users of these unique machines.

Coiled Tubing Units

21 Learning Materials

This session is specific to coiled tubing units and problems related to injector chain tension and traction. The lessons will take you through the common causes of traction and tension problems, and how to prevent them.

Concrete Pump

4 Learning Materials

This session is all about truck-mounted concrete pumps. Study the hydraulic system that powers the dual plungers the push concrete along the boom, and learn more about the swivelling S-Valve that makes it possible.

Dozers

6 Learning Materials

Explore a dozer in this session with one of our Live Schematic simulations, featuring a side-by-side view of the schematic and a cutaway graphic. Experiment with the tilt and lift functions, and set different loads to see what happens inside the system.

Excavators & Shovels

41 Learning Materials

In the world of excavators & shovels, there are a lot of specialized hydraulic components used to solve problems specific to such large mobile machinery. In this session we dive deep into the inner workings of electro-hydraulic control valves, filled with rich 3D and interactive simulations.

Graders

14 Learning Materials

Enjoy this collection of videos and simulations about Graders, such as the Caterpillar H Series and the M Series. Don't miss the 3-part video on troubleshooting hydraulic issues with cylinders that are drifting out of position.

Loaders

9 Learning Materials

Get to know your way around the hydraulics on a loader with the advanced simulations in this sessions. By playing with the steering, boom, and bucket controls, you can interpret, compare, and study the schematics for different varieties of loader.

Marine Vessels

1 Learning Material

See azipod thruster propulsion and steering in action! Coming soon: self-unloading systems and off-shore davit cranes.

Mining Haul Trucks

19 Learning Materials • Updated 30 days ago

Haul trucks from three major manufacturers are covered in this session. Each major subsystem is explored in a dedicated simulation.

Oilfield Cementing

1 Learning Material

Oilfield cementing has driven industrial process technology to produce many specialized components, which you'll learn about in this session. Study the components at the heart of mobile cement units—the cement metering valve, the mix head, and the diffuser, and learn about how these three components work together to provide precise control while blending cement slurry.

Oilfield Pumping

6 Learning Materials

Reciprocating plunger pumps are very common in oilfield pumping. You'll find lots of examples of triplex and quintuplex pumps in particular, from many different manufacturers, working at the wellhead to increase well production.

Railway

4 Learning Materials • Updated 2 months ago

Maintenance of way is the term used for the precision work performed by a variety of special machines that you see on the track. With forceful hydraulic functions and advanced electronic sensors, the railway is carefully levelled and tamped.

10 Stationary Sessions



Cement Plants

2 Learning Materials

In this session you can learn about the inner workings for the hydraulics of a cement plant. Take a look at the accumulators used in the guillotine gate or the advanced control systems of the vertical raw mill

Mine Mill

1 Learning Material • Published 27 days ago

The mine mill is a busy place with a number of very large machines for crushing, grinding and milling ore. These machines may include hydraulic systems and at the very least, a comprehensive lubricant pumping system for critical bearings.

Oriented Strand Board

13 Learning Materials

An oriented strand board (OSB) mill produces a structural panel from strands that are primarily cut from small diameter aspen or poplar logs. The process involves a machine called a strander, which uses a ring of rotating knives to produce the thin wafer—strands—and a hydraulic press, together with heat and adhesives, to form the panel.

Paper Mill

20 Learning Materials

Paper machines depend on hydraulic systems for precise forces, fast motions, and careful load handling. Calender rolls need precisely controlled pressures.

Plastics & Compounding

3 Learning Materials

The manufacturing of products from plastics and compounds involves hydraulics as well as electrical and electronic controls. Here you will find Live Schematics and resources for the machinery involved in everyday life.

Plywood

3 Learning Materials • Updated 2 months ago

In the plywood mill, a lathe is used to peel veneer from a spinning log. The veneer is then dried, has a resin applied, and is subjected to high forces and heat in a press along with other composed layers of veneer.

Ports & Terminals

9 Learning Materials • Updated 3 months ago

In this session, you'll see ship loading systems come to life as Live Schematics. Fine adjustments are made to the position of containers using a trim, list, and skew system as cranes load and unload a vessel.

Pulp Mill

25 Learning Materials • Updated 28 days ago

A pulp mill has the power of a dozen or more freight trains. The thunder is amazing.

Sawmill

9 Learning Materials

Sawmills are full of specialized hydraulic and electrical equipment. Start your exploration of sawmill systems with this session.

Steel Mill

11 Learning Materials

Smelting, casting and rolling are a few of the processes that may be found in a steel mill. Reheating furnaces and cooling beds may also be found among the various machines in use.

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