SolidWorks DXF Flat Pattern Dimensions Wrong — Fix the K-Factor and Bend Allowance

The flat pattern comes out wrong. The folded part measures correctly. The DXF dimensions are off by a few millimeters — or sometimes more. Your press brake operator is asking questions you can’t easily answer. This is a K-factor problem, and it’s common enough that manufacturing shops build their own macros to detect it. Understanding why it happens, and how to set SolidWorks up to avoid it, is worth the time for any team doing regular sheet metal work. ...

9 April 2026 · 7 min · CadShift

SolidWorks Tab and Slot for Weldments — Self-Locating Parts, Flat Patterns and DXF Export

Every fabrication shop has a corner full of welding jigs. Custom fixtures built for a single assembly, used for a single production run, and then stored indefinitely because throwing away tooling feels wrong even when you know you’ll never use it again. SolidWorks’ Tab and Slot feature offers a fundamentally different approach: design the parts so they locate themselves. Instead of external fixtures holding components in alignment during welding, interlocking geometry cut directly into the sheet metal parts does the positioning for you. ...

9 April 2026 · 7 min · CadShift

The Four Levels of CAD Automation — Where SolidWorks Teams Get Stuck and How to Move Up

There’s a recurring post format in the SolidWorks community that breaks CAD automation into levels: macros, parametric design, API integration, configurators. The comments are always the same — experienced engineers arguing about which level their team is actually at, and why Level 3 is the sweet spot that most teams never reach. They’re right. And understanding why most teams plateau matters if you’re trying to decide where to invest automation effort. ...

9 April 2026 · 10 min · CadShift

What Fabricators Actually Need from Your DXF Files — Beyond Just Geometry

Engineers tend to think about DXF quality in terms of geometry accuracy. Does the flat pattern dimension match the folded part? Are the holes in the right positions? Is the file exported at the correct scale? These things matter. But they’re the minimum requirement. Fabricators — particularly laser cutting shops and press brake operators — need significantly more from a DXF file to actually process a part without back-and-forth. The geometry tells them what to cut. Everything else tells them how to do the job. ...

9 April 2026 · 7 min · CadShift

How FreeCAD Creates 2D Drawings from 3D Models — TechDraw's Open-Source Projection Pipeline vs SolidWorks

You click “Insert View” in FreeCAD’s TechDraw workbench, point it at a 3D part, and a few seconds later a clean 2D projection appears on the drawing page. Hidden lines are dashed, silhouettes follow curved surfaces, and section views show cross-hatched cut faces. It looks like the same thing SolidWorks does. And at a high level, it is — both systems solve the same fundamental problem: project a 3D solid onto a 2D plane, figure out which edges are visible, and draw the result. ...

7 April 2026 · 10 min · CadShift

SolidWorks .slddrw Drawing Files — Format Internals, Drawing View Types, and API Reference

Every SolidWorks user has opened a .SLDDRW file thousands of times. You place views, add dimensions, print to PDF, send it to the shop. But what’s actually inside that file? Is it vector graphics — maybe SVG behind the scenes? Is it a database of coordinates? How does a drawing “know” what the 3D model looks like from the front? We decompiled the SolidWorks interop DLLs, inspected exported symbols from native C++ libraries, and dug through the API documentation to answer these questions. Here’s what we found. ...

7 April 2026 · 16 min · CadShift

Why SolidWorks DXF Export Settings Don't Save — ExportToDWG2 Flat Pattern Fix

Every mechanical engineer who works with sheet metal in SolidWorks has clicked Export DXF/DWG hundreds of times. The flat pattern appears, a file lands on disk, and you send it to the laser cutter. But what actually happens between clicking that button and getting a flat DXF? Why is it slow? And why does the orientation sometimes feel random? We spent time digging into the SolidWorks API documentation, decompiling DLLs, and examining exported symbols to understand the full pipeline — the same approach we used when investigating how SolidWorks drawing files store geometry internally. Here’s what we found. ...

7 April 2026 · 9 min · CadShift

How to Convert SolidWorks Files to STEP Format: The Complete Guide

How to Convert SolidWorks to STEP — The Quick Answer and Why It’s Rarely Enough To convert SolidWorks to STEP format, open the part or assembly, go to File > Save As, choose STEP AP214 (or AP203/AP242) from the type dropdown, click Options to set version and geometry flags, then hit Save. This takes about thirty seconds for a single file. Got one file and some spare time? You’re done. ...

28 March 2026 · 20 min · CadShift

SolidWorks vs Fusion 360 vs Inventor 2026 — Honest Comparison for Manufacturing Teams

Choosing the right CAD software can make or break your engineering team’s productivity. With dozens of options available, three platforms consistently rise to the top: SolidWorks, Fusion 360, and Inventor. Each platform offers unique strengths, but they serve different needs. SolidWorks dominates traditional manufacturing, Fusion 360 appeals to startups and cloud-first teams, while Inventor integrates seamlessly with Autodesk’s ecosystem. This comparison covers features, pricing, learning curves, and real-world applications to help you match the platform to your workflow and budget. ...

20 March 2026 · 35 min · CadShift

CAD File Migration: Complete Guide to Switching Between Software Platforms

Switching CAD software platforms can feel overwhelming when you’re staring at thousands of files that need conversion. Whether your company is upgrading to newer software, consolidating platforms, or moving to cloud-based solutions, CAD file migration requires careful planning to avoid data loss and maintain design integrity. This guide walks you through every aspect of CAD software migration, from initial assessment to final validation. You’ll learn how to preserve critical design data, maintain file relationships, and establish efficient workflows that minimise disruption to your engineering projects. ...

17 March 2026 · 10 min · CadShift