Creating a formula for number of convolutions in a shaft?

[Baratheons]

Hello,

I've seen it done before, but how would I go about creating a formula for generating the number of convolutions (bellows) in a sketch?
I know how to create a formula ,but when you have a profile and you want to shaft it around an axis, I'm having difficulty in using parameters and formulas to generate how many profiles to shaft.
Say I want one convolution, I would type 1 in the parameters, typing three would generate three convolutions, and it would automatically update the number of convolutions in the sketch.

Thank you for any help

 

[amitpatel87]

IS this not better done as "1" convolution which is patterned using "rectangular pattern" tool? where 2 or more convolutions is just a pattern of the original revolve?

 

[itsmyjob]

create the sketch
create a GSD rect patterne instance & spacing(linked to value in sketch)
create a join of the sketch + the pattern
create a parameter as integer with value limit(low = 1, high is what you want)

drive the pattern instances with parameter

now we see that if parameter = 1 then the pattern and the join go bad. we will fix soon KWA rules

now create a parameter Curve

create KWA rule and make it as follow:

if parameter = 1
(
deactivate pattern & join
)
else
(
activate pattern & join
)


create another rule as follow:

assign curve = sketch
if pattern.activity = true
{
curve = join
}

verify that curve is what you want when you change parameter

finish with revolve Thick Profile based on curve

Eric N.
indocti discant et ament meminisse periti ​