12/3/2023 0 Comments Dimensioning in librecad![]() Create a new page (Insert new default page).ensure the 3d view is set to “top” (view -> standard views -> top, hotkey “2” or click on the top face of the view cube). ![]() It is in fast development at the time of writing which is why no detailed tutorial is provided how to use it. The tech draw workbench is the main workbench for creating dimensioned drawings in freecad. Molex_Micro-Fit_3.0_43045-1215_2x06_P3.00mm_Vertical.kicad_mod (5.2 KB)įor convenience here a simplified drawing from the datasheet (removed unnecessary stuff to reduce clutter for this tutorial) with highlighted dimensions.ġ881×1165 140 KB Create dimensioned drawing to compare against datasheet Using the Tech Draw workbench In this tutorial we will be checking the following footprint from the official library of version 5. An alternative is that a specific dimension is given as an equation (example (pincount - 1) * pin pitch to describe the distance between the outermost pins) In such documents dimensions that differ between the described parts are typically marked with a letter in the drawing and specified in a table. A typical example is the datasheet for connectors available for many pin counts. Some datasheets define dimensions for a full series of components. Sometimes these dimensions are in a separate document. To check a footprint you will need to use the dimensions given in the datasheet. Reading the Datasheets Suggested Footprint Export from freecad as dxf (via for example tech draw) and dimension in LibreCAD.Tech Draw workbench included in freecad since version 0.17.Drawing dimensions workbench This workbench is sadly no longer maintained.KiCad Stepup workbench (Can also be installed directly via the addon manager found under Tools->Addon manager).Freecad preferably version 0.17 or newer.This will be fixed in version 6 of kicad as it brings more powerful snapping for the inspect mode and rather good dimensioning tools in pcbnew A updated tutorial for nightly builds close to version 6 can be found under Tutorial: How to check footprint correctness? (Pre Version 6 nightlies) Requirements for Following this Tutorial ![]() For this reason it is sadly easier to export the footprint to other tools and dimension it there than to try and use KiCad for this task. While v5 added the measurement tool it did not have the option to snap to for example pad corners (one can only snap to pad centers). Sadly KiCad version 5 and earlier are rather limited in inspection options. Checking a Footprint Against a Suggested Footprint in the Datasheet
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