If you have the DeltaCad with Macros there should be a Spiral.bas macro in your Macro subdirectory. Here are some modifications to make any shape and size spring coils.
Code:
Dim s(1000) As Double
.
.
r = InputBox("Enter outside Radius","Spiral","2")
r2= InputBox("Enter inside Radius","Spiral","0")
sp2= InputBox("Enter spacing","Spiral",".18")
sp=sp2/18
a = 0
n = 0
While r > r2
n = n + 1
s(n*2-1) = Cos(a*5/180*3.14)*r
s(n*2) = Sin(a*5/180*3.14)*r
r = r - sp
a = a + 4
Wend