Try these for SEG1, SEG2 and Partname.
IIF(InStr([DrawingDesc],"CNC"), Trim(Left([DrawingDesc],InStr([DrawingDesc],"CNC")-1)), Null) AS SEG1,
IIF(Instr([DrawingDesc],"CNC"), Trim(Mid([DrawingDesc],InStr([DrawingDesc],"CNC")+3)), Null) AS SEG2,
IIf(InStr([SEG2],"#"), Replace([SEG2],"#","")...