Fiber head’s radius: R
Fiber Diameter: D1,D2,D3..........
Fiber quantity:N1,N2,N3......
Result:Π*R*R>=Π*N1*D1*D1/4+Π*N2*D2*D2/4+Π*N3*D3*D3/4................
Example:
fiber head’s radius (Diameter 20mm)
Fiber Diameter:0.75mm,1.0mm,1.5mm
Fiber Quantity:150pcs,50pcs,10pcs......
Result:3.14*10*10>=3.14*150*0.75*0.75/4+3.14*50*1*1/4+3.14*10*1.5*1.5/4