Machine Design Knowledge Lab
MECHALOGICS ENGINEERING KNOWLEDGE
A structured reference on mechanisms, materials, manufacturing, assembly, and design decisions—developed to make technical information easier to interpret, compare, and apply.
HOW THIS LIBRARY IS ORGANIZED
From engineering principles to usable decision criteria.
Each note separates definitions, operating conditions, decision criteria, and points that require verification. The purpose is to make technical reasoning easier to follow and reuse.
KNOWLEDGE TRACK DIRECTORY
Each track is a permanent subject category. Select one to open its complete index of principles, detailed notes, examples, and verification points.
01 · FUNCTION
Function & system structure
Requirements, functional modules, interfaces, operating sequences, and the logic connecting a machine’s subsystems.
02 · MOTION
Mechanism & motion
Motion paths, transmission logic, actuators, constraints, contact relationships, and machine operating sequences.
03 · MATERIAL
Materials & environment
Material properties, operating conditions, availability, corrosion, wear, hygiene, and production implications.
04 · ASSEMBLY
Assembly & maintenance
Joining sequence, access, disassembly, serviceability, inspection points, replacement work, and human interaction.
05 · MANUFACTURING
Manufacturing & DFMA
Process capability, tooling, joining, inspection, tolerances, production time, and design choices that affect manufacturability.
06 · CONTROL
Control systems
Control architecture, signals, sensors, actuators, interlocks, feedback, operating states, and responses to abnormal conditions.
EDITORIAL PERSPECTIVES
Engineering design perspectives
A separate essay series on engineering culture, AI, design judgment, and the changing role of the designer.
READ →
DESIGN DECISION FRAMEWORK
Six criteria, weighted for the design decision
The six core criteria are reviewed together, then weighted against customer requirements, operating conditions, and real-world constraints. Explore the criteria first, then see how their trade-offs are converted into a design judgment.
6 Core Design Criteria
Functional geometry, material suitability, manufacturing feasibility, life-cycle cost, assemblability and serviceability, and risk control.
Explore the six criteria →
Design Criteria Weighting
See how practical weights, conflicts, and evidence are combined to compare alternatives and support a traceable design decision.
See the weighting method →
APPLIED ENGINEERING NOTES
Cross-track analysis for practical design decisions
Each article applies one or more knowledge tracks to a specific engineering question. The label identifies the dominant analysis theme, while relationships to other tracks are developed inside the article.
Design Criteria & Risk
How to Weight Competing Criteria in Machine Design
A practical method for weighting machine-design criteria, comparing feasible concepts, testing sensitivity, and recording the evidence behind a decision.
Read technical note
Design Criteria & Risk
Designing to Control Risk and Maintain Function Under Uncertainty
A practical framework for controlling engineering risk, designing for variation, reviewing dependent failures, and linking each control to evidence.
Read technical note
Function & Modules
How Function-Based Modules Are Classified in Mechanical Design
A function module is a physical design unit composed of multiple parts, mechanical elements, power transmission elements, control elements, and interfaces that work together to perform a specific function within a machine.
Read technical note
Design Criteria & Risk
Integrating Assembly and Maintenance into Product Structure
A practical guide to integrating assembly sequence, interfaces, access, inspection, and maintenance paths into machine product structure.
Read technical note
Design Criteria & Risk
A Design Criterion for Evaluating Costs Across the Entire Product Life
A structured method for comparing machine-design alternatives through acquisition, operation, maintenance, downtime, and replacement costs.
Read technical note
Design Criteria & Risk
Verifying Whether a Design Can Be Realized as an Actual Product
A manufacturing-feasibility review for connecting design features to process capability, tooling, inspection, suppliers, and production evidence.
Read technical note
Function & Modules
Requirement, Function, and Structure
One of the most common sources of confusion in mechanical design is the difference between requirements, functions, and structures.
Read technical note
Design Criteria & Risk
Designing with Materials Suited to Function and Operating Environment
A practical framework for selecting machine materials by function, environment, failure mode, processing, interfaces, supply, and verification.
Read technical note
Design Criteria & Risk
Designing Geometry to Realize Function
A practical guide to connecting machine geometry with function, interfaces, load and motion paths, tolerances, manufacturing, and verification.
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Function & Modules
Technical Understanding of Material Handling Modules
In mechanical design, a material handling module is a design unit responsible for moving, aligning, feeding, transferring, and discharging raw materials, semi-finished products, or finished products within a machine or between process stages.
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Mechanism & Motion
Force Amplification Mechanism
A force amplification mechanism is a mechanical system that converts a relatively small input force or input torque into a larger output force or output torque.
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Function & Modules
Technical Understanding of Processing and Working Modules
In mechanical design, a processing / working module is a function module that directly acts on raw materials, semi-finished products, or finished products to change their shape, size, state, physical properties, position, arrangement, or bonding condition.
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