Some more KiCAD goodness
Posted: Sat Jan 18, 2020 10:42 pm
I recently ordered a random VCU case from aliexpress (this one https://www.aliexpress.com/item/4000115814857.html), it was of course completely undocumented and unfortunately I couldn't get my calipers to fit to give me the required measurements. This is when I discovered a couple of excellent features available in the PCB design part of KiCAD.
Export to STEP gives just the board outline and drill holes 1.6mm thick. I was able to convert the STEP to an STL in FreeCAD and print the first few layers so I had a rigid sheet I could attach the connectors to in order to get accurate spacing and also check the position of the mechanical mounting holes. It took about 4 iterations to get everything right, but saved me sending off for boards which won't fit.
When I discovered this I thought I'd have a look at what else I could get out of it. Export to VRML of Johannes V3 board (screen grab from FreeCAD)
The VRML file pushed through meshconv (https://www.patrickmin.com/meshconv/) to convert to an STL then loaded into CURA.
I've attached the VRML and STL below in case anyone has any use for them.
Export to STEP gives just the board outline and drill holes 1.6mm thick. I was able to convert the STEP to an STL in FreeCAD and print the first few layers so I had a rigid sheet I could attach the connectors to in order to get accurate spacing and also check the position of the mechanical mounting holes. It took about 4 iterations to get everything right, but saved me sending off for boards which won't fit.