Attribute question NX6

[jackley]

I have a question regarding attributes and automation.

In the attached jpeg, there are holes in 9 holes in line with each other and 8 columns.

I have attributes set up for # of rows and columns, distance from the edges of the pocket to the center of the first circle, pocket height and width. My end goal is to change the # of rows and columns and they adjust accordingly inside the pocket. I need them equally spaced between each other vertically. I need the columns equally spaced between the 1st and 2nd and 3rd and 4th, every other.

I am having trouble getting the holes equally spaced between one another from one column to the next. Only if I have perfect numbers can I achieve it.

Anyone have any guidance for me? Thank you.

Justin
Designer

 

[jerry1423]

you should be able to use your expressions to determine the spacing.

For instance when I have a bolt circle I always associate two expressions so that I only have to change the number of holes and the spacing will adjust . . . if p29=10 and p30=36 (p29 is the number of holes, and p30 is the angular spacing between the holes) I then set p30=360/p29.

You can do something similar with your linear spacing ... set the spacing between the holes as a factor of the length and number of holes.

 

[jackley]

Well I have been trying to use the expressions to get this. But if I do not have the perfect number, they are not equally spaced. I want to be able to have them always equally spaced between each other (in the Y vector).

I thought perhaps if someone had a few minutes they could do this and attach an example file so I could see where my mistakes are. I have spent a fair amount of time on this with a colleague. I think we are close, just something isn't tracking.

Justin
Designer

 

[jackley]

I have attached my part file to show what we have come up with so far.

Thank you

Justin
Designer

 

[looslib]

Basic math.
spaces = #_holes -1
spacing = distance_between_hole1_and HoleN/spaces

Just write the instance array spacing expression as a formula.

"Wildfires are dangerous, hard to control, and economically catastrophic."

Ben Loosli

 

[JohnRBaker]

What do you mean by a 'perfect number'?

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

http://www.plmworld.org/museum/

To an Engineer, the glass is twice as big as it needs to be.

 

[hudson888]

A positive integer that is the sum of its proper positive divisors?

Best Regards

Hudson

www.jamb.com.au

Nil Desperandum illegitimi non carborundum