Blog
Technical Knowledge for Hardware Engineers
Practical articles on CAD design, prototyping, injection molding and DFM, straight from an engineer.
Injection Molding
Small Batch Injection Molding: What Low Volumes Really Cost
Tooling from ~€1,500, unit prices €1–5, break-even at 100–300 parts. Aluminum vs. steel tools and the hidden cost factors of low-volume molding.
CAD × AI
Agentic CAD Run 2: One brief, injection molding, full documentation
One brief to Claude Opus 5.5 with the process named: drawings, BOM, assembly guide and DFM check. What the agent delivered, what my review found, what the time and cost really were.
CAD × AI
Agentic CAD put to the test: Claude Opus builds a Pi 4 housing
Claude Opus via MCP in my Fusion session: a Pi 4 housing in one pass. What the model can do, where it breaks, why the process prompt changes everything.
CAD Design
What Does CAD Design Cost?
Pricing models, cost ranges and comparison: Freelancer vs. Agency vs. Retainer.
Prototyping
Prototyping Costs Compared
3D printing, CNC, silicone mold, rapid tooling, costs, timelines and decision matrix.
Prototyping
Rapid Prototyping: Processes, Costs & Definition 2026
Every process from FDM to rapid tooling: cost per part, lead times and the right process for each project phase.
Injection Molding
Injection Molding Costs: What an Enclosure Really Costs
Tool costs, per-unit costs and break-even analysis for injection molding projects.
Injection Molding
Cutting Injection Molding Costs: 10 Concrete Levers
Ten levers from DFM to material choice: wall thickness, avoiding side actions, total-cost material choice, cavities and DFM review, with price examples.
Injection Molding
Injection Mold Tool: China vs. Germany
Tooling costs, hidden expenses, lead times and IP risks, with a decision matrix.
Injection Molding
7 DFM Mistakes That Double Your Injection Molding Cost
The most common Design for Manufacturing mistakes and how to avoid them.
DFM
DFM Audit: What It Costs and What It Saves
What a DFM audit costs, which mistakes it catches, and how €1,500 saves €8,000 in tooling iterations.
Design
5 Enclosure Design Mistakes That Cost You Money
Wall thickness, draft angles, tolerances, parting line, assembly concept.
Prototyping
3D Printing vs. CNC: When Does Each Make Sense?
Comparison by cost, quality, material and use case.
Injection Molding
Injection Molding Processes: Cavities, Multi-Component, Gas Assist
Cost comparison and decision criteria for specialty molding processes.
Prototyping
Aluminum Rapid Tooling: Costs & Lead Time
Aluminum rapid tooling for small series: cost, tool life, and lead time compared to steel.
Engineering
Tolerance Analysis & GD&T (ISO 1101): Guide + Costs
Tolerance stacks and geometric dimensioning per ISO 1101, with real costs: mold rework €500–5,000, 2–4 weeks delay.
Injection Molding
Production Injection Molding: From Prototype to Series
Tooling strategy, per-part costs from €0.50, cycle times and quality assurance for the step to series production.
Injection Molding
Production Injection Molding in Detail: Tooling, Unit Costs, CPK
Design freeze, pilot tool vs. steel tool, break-even math, cycle-time planning and CPK quality assurance: the complete guide.
Injection Molding
Material Selection for Injection Molding: PA, PP, ABS, POM, TPE Compared
The most important injection molding plastics compared: strength, shrinkage, cost and typical applications.
CAD Design
Reverse Engineering: Reconstructing Existing Parts
From physical part to parametric CAD model: 3D scanning, CT, surface reconstruction and tolerance pitfalls.
Prototyping
Prototype Trap: Why Your First Prototype Won't Scale
Why prototype and production part are two different products, and how to bridge the gap without an expensive redesign.
Injection Molding
Tooling Gone Wrong: 5 Expensive Lessons
Five tooling mistakes from real projects: DFM review, moldflow, steel selection, contract clauses and design freeze, with concrete costs.
Startup
Hardware Startup Budget: From Idea to MVP
The 6 budget blocks to MVP, a phase model and the 5 biggest budget killers, with a worked example.
Certification
CE Marking: 4 Mistakes That Delay Product Launches
Directive mapping, EMC planning, technical documentation and the marking area, four mistakes with concrete time and cost impact.
CAD Design
Hiring a CAD Design Firm: Costs, Process & Outsourcing
Hourly rates of €80–150, packages from €1,500, the process in 6 steps and when outsourcing actually pays off.
CAD Design
Why Your CAD Model Looks Production-Ready But Isn't
7 patterns that fail in tooling review, a self-check before requesting quotes and typical findings from review practice.