Need help finishing a block (constraints)

[j_rosler_vcat]

I found a block to automatically space @ maximum distance and calculate # of objects, which I modified to serve as a balcony guardrail.
The original block uses constraints and I was able to modify them to my liking, but I'm having trouble finishing the block by somehow linking a new linear stretch action to the original constraint (basically I want to be able to manipulate the block using only 1 grip instead of two)

I'm not sure what the best way to do this is. I figured the best way is with another constraint for the handrail/hatch to follow somehow, but I only have access to AutoCAD LT and can't create new constraints.

I'd appreciate if someone more knowledgeable could help me finish my block, thanks.

[tracey.platt]

I had a look at your block, why don't you start over with creating a dynamic block from scratch and putting your constraints and actions in to suit? rather than trying to modify what someone else has done, it may be a lot easier?

[j_rosler_vcat]

Because I can't add any new constraints other than the ones already in that drawing in LT. I can only modify existing constraints and I don't know how to make the block work how I'd like without creating new constraints.

I also really like the way this block automatically splits any distance into equal parts (up to a maximum spacing) and I would like my guardrail block to work like this. There probably is a better way of doing it from scratch, but if there is I'm not experienced enough with dynamic blocks to know how.

[pendean]

While you wait @j_rosler_vcat ... Download a 30-day trial of Full AutoCAD and start creating your library https://www.autodesk.com/products/autocad/free-trial

[j.palmeL29YX]

What you want to achieve is IMO only possible using constraints. 

And in addition you should never mix constraints with dynamic parameters and actions. Otherwise you will get "unexpected results". 

[j.palmeL29YX]

@j_rosler_vcat 

Can you give us two numerical values please:
- which maximum length the balcony will not exceed (wich max length can be expected)?
- what is the maximum width of a single segment?

[j_rosler_vcat]

@j.palmeL29YX Certainly! 

Maximum length: I'd say about 20'-0" would be acceptable, but even longer would be ideal (up to 100'-0" max.).

Maximum spacing: I have it currently set to add a new segment every 5'-0" MAX, which I think looks fine.

Thanks and let me know if you have any other questions.

[j.palmeL29YX · Accepted solution]

Attached is a suggestion which should work (and should be editable) in ACAD LT too. (I can't test it).

>>Usage<<: 

Drag the length overall to any value of your need (or type the value in the properties window). 

Then type a number of segments in the property window  and choose a value until you get an acceptable result. 

[j_rosler_vcat]

Thanks a lot! That is very close to what I was looking for. However, is there a way to automatically calculate the number of sections, so I don't need to enter it manually? example: Num= CEIL(Distance / 60) 

[j.palmeL29YX]

---

@j_rosler_vcat wrote:

 is there a way to automatically calculate the number of sections, so I don't need to enter it manually? example: Num= CEIL(Distance / 60) 

---

No, that's not possible. You can not mix Action Parameters and User Parameters in formulas. Neither ActionParameter=f(UserParameter) nor UserParameter=f(ActionParameter).  Therefore I suggested this (not perfect, I know)  workaround. 

[j_rosler_vcat]

Oh ok I understand, well it's not a big problem and it will still end up saving me time in the long run.

Thanks a lot for your time and assistance, much appreciated!