Object in Dynamic Block should be stretch equally but on 400 or less
Accepted solutions (8)
@j.palmeL29YX wrote:
I will post you a solution in the late afternoon.
Hi,
In the above (Post No. 31) posted file "_A CARD (1)-pa2a (v1).dwg" mark the inserted Test-pa block. Now in the properties window set the value for D_emin to 200 and then set the width of one of the three segments (D_hl or D_hm or D_hr) to the value 2770, you will see that the end holes exactly match the 385 apart. So we are on the right track. I have it here only incorrectly on the rivet holes (instead of the weep holes). But this does not change the solution principle.
In the first video I show how to get a geometrically stable model.
Based on your file "Drafting Flow.dwg" (Post No. 32) do this:
- The steps 1 - 6 are ok (even if I don't know why the white lines are extended. But that's no matter for me).
- Create a block definition "test_holes" (or which name you want). (do not include the
circles)
- activate all Constraint Types for AutoConstrain
- command AutoConstrain
- Add a Rotated Dimension (dclinear) 25
- Add the Constraint Parameters (bcparameter) for the horizontal and the vertical dimensions
(D_hor and D_vert)
- Saveas the drawing as "Holes.dwg".
The next video shows how to add the Weep holes.
- Start with "Holes .dwg". (continue from above or open "holes.dwg")
- Add a FIX constraint at the upper left edge (I forgot in the previous video)
- Draw a circle on the weeps layer, diameter 7.5 near the lower left corner.
- in the Parameter Manager add three new parameters:
D_min = 200
n_w=trunc((D_hor-2*D_min)/400)
D_ew=(D_hor-n_w*400)/2
- Array the circle, for number of columns use n_w+1
- Delete the source circle (or set Delobj to a value /= 0 before the array command)
- add two rotated dimensions to get the correct position of the array.
-> Ready
How to draw the Rivet holes is shown above (it is one of several possibilites) . If you
have further questions ask again.
HTH
Jürgen Palme
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Is this what you need? (see Attachment, created with Acad 2020).
Jürgen Palme
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And here (attached "Holes (rev 1).dwg") a small addition, how I would solve the problem with the marked dimensioning.
Jürgen Palme
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@Cladboy have a look at the attached block. The xyparameter is the array for the circle and is chained to the linearx and lineary parameters
Howard Walker
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@Cladboy No that's not it, you downloaded before I realised my mistake. Look at my post again you will see a new attachment there.
Howard Walker
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@h_s_walker, thanks for that, I've clearly got nothing to do! 😂
What i need to do, similar to the parametric option@j.palmeL29YX provided was have the objects that form the array to infill at maximum centres of say 600mm but be equidistant between the start and end points which are set at 100mm from the edges of the rectangle in both directions - not uniform.
Say the rectangle was 1200 wide x 1800 high and the first and last objects inset at both ends by 100mm from the corner; the array objects would be spaced at 500mm horizontally and 533.33mm vertically (taking account of the 100mm at the beginning and end) showing a 3 objects by 4 objects pattern.
The rectangles that i'm creating aren't a uniform size, and could be 1160 wide x 1745 high (for instance) leaving the array objects at 480 centres horizontally x 515 centres vertically, the same number of objects but at differing centres.
Please see below.
ached.
A 3x4 array is easy. See the attached drawing. It may look like there is only one circle, but there are 12 circles attached to the move parameters
Howard Walker
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You would probably need constraints for that. I only have LT here so cannot help with that
Howard Walker
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Accepted solution
Attached my suggestion. Width and Height (drag the appropriate grips or set their value in the properties window) change the dimension of the rectangle. See what happens.
Additional (if you wish) you can change the value "Corner" (the distance of the first and last "object" to the border) and also the value of MaxDist (the max. distance between the objects). Of course you can disable their visibility in the properties window. (All this can be done in the Parameter Manager inside of the block editor).
[EDIT]: Small bug fixed
Jürgen Palme
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@Cladboy wrote:
... did you use a different expression to enable the array to be stretched in both directions?
The array is not an Array Action, but it was created with the standard array command (inside the block editor).
The source object (in this example a circle) was deleted (after creating the array). The distance of the lower left instance of the array to the lower left edge of the rectcangle is driven by the parameter "Corner". The formulas for NC (Number of Columns), DC (Distance between Columns), NR (Number of Rows) and DR (Distance between Rows) you can find in Parameter Manager. And yes, this are other formulas than in the previous version.
BTW: The both construction lines can be deleted, they don't have any function. I hoped they can help to understand the formulas ( 😉 ). And also the parameter "diameter" can be deleted, it was for dimensioning the example circle, which was deleted after creating the array.
Jürgen Palme
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Yes, of course. As far as I know, all attachments in this forum are free to use (unless the author explicitly prohibits it).
Jürgen Palme
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Many thanks!! Apparently I am using AutoCAD LT and cant do much in terms of constraints. However, is there a way to have the corner parameter to have two different constraints. Reason being, my vertical edge distances are different. I can have 100mm from the horizontal edge and then 50mm from the vertical edge so i need to change these separately as they are not uniform see below
Accepted solution
The block can easily be modified - if you had the "full" AutoCAD.
Because you obviously don't have access I attach a file with the modified block. But I'm not sure about the whished horizontal distance. In the text you write 50, in the image I see 30. So I created two different versions.
BTW: In the attached Dyn-Array (v2).dwg you may modify the values d1 and d2 yourselfe in the block editor.
Jürgen Palme
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