Freeware tool for automatic self-locking bobbin design based on core dimensions – ribbon width, stack thickness (buildup), window height, window width. Additionally, it's possible to configure wite slots (count + size), and wire terminal bolt holes (diameter + position). Can be used for EI, C-core and octagonal wound cores (Unicore). By default generates 3D preview with double C-core. Output files are suitable for laser cutting, milling (with corner clearance for milling cutter with selected diameter), and 3D printing.
All necessary geometric parameters are configurable with spreadsheet.
Made with FreeCAD 0.20.2 on OpenSuSE Leap.
Octagonal wound cores usually require higher clearance value relative to stack thickness (buildup) compared to C-cores, because they assembled in small segments with step-lap joints (I use 3mm).
Download latest version here.
License: GNU General Public License V3.0
Step-by-step video tutorial for new users, even with zero to little knowledge of FreeCAD.
Anyone need help with FreeCAD please post on this forum. FreeCAD forum thread.
All necessary geometric parameters are configurable with spreadsheet.
Made with FreeCAD 0.20.2 on OpenSuSE Leap.
Octagonal wound cores usually require higher clearance value relative to stack thickness (buildup) compared to C-cores, because they assembled in small segments with step-lap joints (I use 3mm).
Download latest version here.
License: GNU General Public License V3.0
Step-by-step video tutorial for new users, even with zero to little knowledge of FreeCAD.
Anyone need help with FreeCAD please post on this forum. FreeCAD forum thread.
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