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How do I import an ECAD file like IDF or EMN from DesignSpark PCB or another software?

This tutorial requires:

DesignSpark Mechanical V6.0

An IDF exported from DSPCB comprises of two files - IDB (board file) and IDL (library file)

Make sure to always keep the IDB and IDL in the same folder. To open in DSM, select only the IDB file.
Edits will always be saved in DS Mechanical's native format of RSDOCX.

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Do you have components missing on the 3D board or they have imported with the wrong heights?

If certain components are missing from the imported board or have the wrong heights, firstly close the project in DSM and delete the IDB, IDL and 'xyz** ECAD Library' folder in the directory you had saved from DSPCB at first.

Next, go back to DesignSpark PCB and use the IDF (standard) option in the Output menu with the PCB open. Un-tick 'Use design units' and choose mm, then OK to save to the pre-selected location.

Try opening the IDB in DSM again, and the missing components should now be visible.

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Alternatively, go to the 3D menu-> 3D view settings, and change the units to mm.

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I'm a Mechanical Engineer by qualification though I worked for a long time specialising in Motion Control systems and integration with various PLC systems. I've wide experience of many types of applications from packaging machines to military and some applications that I can't mention. At home, I like to tinker and make things with wood, metal, plastics, electronics and mechanical system. I'm never happier than with a hammer and a screwdriver in my hands....