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Manufacturability issues often start with mechanical design decisions that seem reasonable in CAD, but become difficult, expensive, or hard to control once tooling begins. I always try to be involved in DFM discussions early in the development process because, by the time a tooling issue shows up, the decision that caused it was usually made weeks earlier in CAD. A thick rib can look harmless at first, but later become a sink, warpage, or cosmetic concern. A tolerance may be

The PCB assembly looks good. The solder joints look pristine. Every inspection and end-of-line test passed. Then, months later, the module fails because of a short circuit. How? Hidden inside what looked like a good assembly, tiny conductive filaments may be growing slowly from tin-rich plated surfaces. They are called tin whiskers. Almost invisible, unexpected, and conductive enough to bridge two nearby conductors, they can create the kind of short circuit that feels mysteri

They can be the difference between an acceptable plastic part and a well-engineered one. Used well, ribs can help improve: • Structural stiffness • Load paths and stress redistribution • Packaging and component clearance • Mold filling and flow balance when coordinated with gate location • Fiber orientation in glass-filled materials • Panel flex and vibration behavior, including shifting natural frequencies • Assembly support, alignment, and interface protection• Overall manu

Select the best plastic is about finding the one that answers the real requirements of the part. · You need a good appearance and easy processing? ABS may be enough at a low cost. · Need better impact resistance or toughness? PC may be a better direction, if the added cost and processing requirements make sense. · Need a balance of appearance, toughness, and manufacturability? PC+ABS is often a practical compromise. · Need more strength and stiffne

Some design considerations in die-cast aluminum housings are discussed early and often. Others tend to get less attention, even though they can create bigger mechanical problems later in builds, validation, or production. Common considerations usually include: Wall thickness, ribs, and bossesDraft and as-cast limitationsWhich surfaces need machining for mounting, sealing, or alignment Even those common considerations are not always simple. Draft, for example, is not one fixed

They often carry several jobs at once:structure, mounting, sealing, thermal path, and sometimes electrical grounding. That is why they can create late program problems even when the CAD looks mature. A housing may look fully resolved on screen, even after simulation and early testing, and still show weak areas later in tooling, builds, validation, or production. Some important questions to ask early are: - Which surfaces are truly critical to function? - What

Too often, teams fill it out quickly after the design is already done, just because the process requires it. But DFMEA is not just a document for audits or program reviews.A strong mechanical engineer uses it to improve the design and reduce risk early. For mechanical engineers, the best DFMEA discussions are not abstract.They are tied to real design decisions. At its core, DFMEA is a structured way to think through how a design could fail, what could cause it, how serious th

That is exactly why they create so many late development surprises. At first glance, a busbar looks easy: A piece of copper or aluminum.A few bends.A few holes.Done. But in real products, busbars are rarely just conductors. They also become electrical interfaces, bolted joints, tolerance-sensitive parts, thermal paths, packaging constraints, and supplier capability risks. That is where the trouble starts. A busbar can pass a drawing review and still create build problems, bec

Mechanical design usually starts with questions like: What is the function of the assembly? Where is it going to be placed? Those are important. But some of the most valuable design questions come right after: Who is going to manufacture the components?Who is going to assemble them?Who is going to test them?Who is going to service them later? I still remember a “simple” front light bulb replacement that turned into almost a full day of work because so many surrounding parts h

They are not optional. Every critical interface in a mechanical assembly needs one, and it must be based on reliable, up-to-date CAD models and drawings. Here’s a simple 5-step approach we use to perform professional tolerance studies before releasing an assembly: 1. Define the Functional Goal Is the objective a specific gap, a press-fit interference, or critical alignment? Write it down before picking dimensions. A clear goal prevents “dimension creep,” where features ar

Every electronic device generates heat when it operates. ECUs, sensors, power supplies, LED lights, they all produce thermal energy. The challenge is getting that heat out before it damages the components. In electronics, excessive heat causes: Reduced performance Shortened lifespan of components Complete device failure Safety risks in some applications Here's the Interesting Part As a conservative design guideline, a 10-degree Celsius increase in temperature can significantl

At first glance, packaging an ECU or sensor seems straightforward. However, late mechanical discoveries are a leading cause of costly redesigns and schedule slips. In my 25+ years in automotive design, I have seen that when mechanical design is flawed, even perfect electronics can fail. At Abal Mechanical Design, we focus on these essentials to ensure first-attempt success. 1. Thermal Management: Define your heat path early. On metal, drive conduction through the baseplat

Abal Mechanical Design LLC can help you avoid paying for unnecessarily complex tooling or a few “quick” welds, we pay attention to some quick design rules: 1. Wall thickness • PC-ABS: 2.0–2.5 mm. • PBT-GF: 1.2–2.0 mm. • PA-GF: 1.5–2.0 mm. Anything thicker begs for sink, warp, and longer cooling. If you need stiffness, core the bulk and create ribs (rib base ≤ 60 % wall, height ≥ 2.5 × wall, spaced ≥ 3 × wall). 2. Draft angles Minimum 1 ° per side on textured walls, 0

In over 25 years of automotive design, I have seen that while low-voltage modules are sensitive, HV power electronics like Inverters, OBCs, and BDUs are unforgiving. When packaging components that handle hundreds of volts, mechanical design becomes the primary driver for safety and reliability. At Abal Mechanical Design, we prioritize these constraints during the architecture phase to avoid the costly redesigns that often surface during late-stage validation. 1. Thermal Path