Problem

We need to find out what the line thickness is that correspond to each line weight in IPLOT. 

Solution

For this example we will use a plotter that has a resolution (DPI) of 600. By default we use the following rule:
Take the weight and divided by the DPI (resolution of the plotter).
Since weight 0 can only be as small as one dot wide we start with 1
when determining the thickness. Example:
weight 0 = 1/600
weight 1 = 2/600
weight 2 = 3/600
weight 3 = 4/600
and so on up to weight 31.

You can also control your thickness through a Design Script. Here are a couple of examples from the Help available available for the product. weight_base/weight_delta
The weight_base and weight_delta keywords map line weights to physical thicknesses on the plot. Using these keywords, you can get consistent line thicknesses across various plotters. The weight_base keyword specifies the line thickness for an element of weight 0. The weight_delta keyword specifies an additional line thickness increment to add for each line weight above 0. Use the following formula to calculate line thickness using the weight_base and weight_delta keywords:

plot thickness = weight_base + (element weight * weight_delta)

For example, if the weight_base is 0.1 cm and weight_delta is 0.05 cm, the following values are used.

Weight Plot Thickness
0 0.10 cm
1 0.15 cm
2 0.20 cm
.
.
.
.
.
.
31 1.65 cm

You must define the weight_base and weight_delta keywords at the beginning of the design script.

Syntax:


weight_base = positive_real
weight_delta = positive_real

Example:


!
! Map element's line weight to a thickness on
! the plot.
! weight 0 = 0.10 mm
! weight 1 = 0.15 mm
! weight 2 = 0.20 mm
! weight 3 = 0.25 mm
! .
! .
! .
! weight 31 = 1.65 mm
units = mm
weight_base = 0.1
weight_delta = 0.05

Here is another example using weight and thickness:
units= mm
switch (weight)
case 0 ?
thickness = 0.10
case 1 ?
thickness = 0.15
case 2 ?
thickness = 0.20
case 3 ?
thickness = 0.25
case 4 ?
thickness = 0.30
case 5 ?
thickness = 0.35
case 6 ?
thickness = 0.40
case 7 ?
thickness = 0.45
case 8 ?
thickness = 0.50
case 9 ?
thickness = 0.55
case 10 ?
thickness = 0.60
case 11 ?
thickness = 0.65
case 12 ?
thickness = 0.70
case 13 ?
thickness = 0.75
case 14 ?
thickness = 0.80
case 15 ?
thickness = 0.85
endswitch
if (weight > 15) then
thickness = 1.00
endif