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Validation spreadsheets and updated drilling diagram for the CD Spot Welder A zip file containing two .xlsx format spreadsheets with calculations and information used to validate the Capacitor Discharge Spot Welder design. These are not required to build the Spot Welder but might be of interest to readers. We're also including an updated version of the front panel drilling diagram as a download because the original had some errors. Cat No SC6306. Price: Free Files: Welder Calcs.zip (ZIP contains two .xlsx files; 723.7KB) Fig.16 - CD Spot Welder front panel drilling.pdf (385.8KB) Related to: Project: Capacitor Discharge Welder, part one (March 2022 [print issue] [online issue]) Project: Capacitor Discharge Welder, Pt2 (April 2022 [print issue] [online issue]) Other items relevant to these projects: Capacitor Discharge Welder Power Supply PCB [29103221] ($5.00) Add to trolley Capacitor Discharge Welder Control PCB [29103222] ($5.00) Add to trolley Capacitor Discharge Welder Energy Storage Module PCB [29103223] ($3.50) Add 10 to trolley IRFB7434(G)PBF‎ N-channel high-current Mosfet ($5.00) Add 1 to trolley Hard-to-get parts & PCB for the Capacitor Discharge Welder Energy Storage Module (ESM) ($20.00) Add 10 to trolley Hard-to-get parts & PCB for the Capacitor Discharge Welder Power Supply ($25.00) Add to trolley Capacitor Discharge Welder PCB patterns (PDF download) [29103221-3] (Free) Add to trolley