Need a little help with this D-Block

I've searched the forums, and learned a lot from different threads. I've gone online and pulled as many tutorials as I could find (including white papers) but most seem very "basic" for what I'm trying to get done here.

I've attached a DWG with two details. We call these "Covers", and this is only the second half. The 1st half is called the mounting section, but the concept is similar.

The Cover on the left is drawn 1:1, dimensions were calculated for a specific job. On the right is a Dynamic Block that we wish to simply type in these calculations and produce the correct cover. The table has the calculations required.

I have an "okay" understanding of Dynamic Blocks, but we've only been working on this for about two days now. We cannot find a way to adjust the radius of the curve. We've tried scale actions which worked, but it detached the arc from the "tabs". We eventually want to build onto this block with visibility states (i.e. adjacent panels will not have the "tabs").

Any help to troubleshoot this is greatly appreciated.

Tim

Cover.dwg

I've noticed there have been quite a few "views" in the past week for this thread, but no comments. I'm not sure if this means that no one has a solution, or that there just isn't much movement in these threads in recent days.

Working on it ourselves for the past week hasn't produced a solution either.

Please, any suggestions?

Tim

I have some free time today, I will take a look at it.

Change the stretch actions to scale action on cord 4.

This was just a quick look. I will test it later tonight.

You can insert a Door imperial dyn block, select the door block, open the dyn block editor and look at the action's that are applied to the arc.

I don't know if it will work. It seems you want Acad to draw the object for you. But the "stretch" action doesn't work the same as grabbing the grip and pulling it up. Same as "stretch" action doesn't seem to work on midpoints.

You may be able to use a LISP that reads your inputs in the table and draws an arc for you. Maybe?

I see.

I haven't changed anything yet, but I wanted to show you some quick examples of how the arch would have to change.

We would need the block to be THIS flexible. I saw the door block, but I think that the scale will override the another command that defines the chord.

@qball

We sort of DO want acad to draw it for us. This is the part of the drawing that should get the least amount of time dedicated to. Its like the "adding" of the drawings in terms of equivalence: everyone can do it, but there must be a much easier, more automated way to get past the simple stuff to focus on the larger picture. Some of the draftsmen here already make blocks of these, because this is only one small part of the larger picture, but it gets used and referenced several times in the set of drawings, so changing the one block adjusts every reference. We just want the initial drawing to be more automated.

The effect we need is exactly as you described - grabbing the midpoint grip and adjusting the radius of the arch. We need the endpoints to stay anchored to the other part of the detail while the arch gets "scaled"...

Cover Examples.dwg