Cut Size of Volume Damper in a Boot Tap that is Lined

[jaysomlam]

I find that when CAMduct nests the volume damper of a boot tap that is lined, it doesn't take into account of the liner thickness.  Let say we have a boot tap that has a 14"x14" air opening in the air leaving end.  And the boot tap is lined with 1" insulation.  If I put a volume damper near the air leaving opening of that boot tap, I expect the metal blade of the volume damper to be smaller in order to make room for the thickness of the liner.  But it doesn't.  The cut size of the volume damper stays the same regardless if the boot tap is lined or not.

How can I tell CAMduct to reduce the volume damper cut size by the thickness of the liner?

Please let me know.  Thanks.

Jaysom

[DotNet]

For this and other reasons you stated in your other damper inset thread, I don't find the dampers in Fabrication very useful, especially since they've been burning the holes on the wrong side of CID#7 since 2017.

The only way to do this is to create a whole new set of dampers for each liner thickness. As for your other question with the inset, you would need a database damper set up for every possible inset dimension. Every possible liner thickness * every possible inset dimension would be the number of database dampers you would need to define. Terrible, and the detailer will need to manually confirm that the right damper was chosen in each case.

If it were me Jay, I would write an app that scans taps and adds damper blade items to CAM, or programmatically add the correct damper to each tap.

[jaysomlam]

Thanks for your very useful suggestions.  I greatly appreciate that.

Based on your suggestions, I will do these two things:
1.  Add a volume damper option for each liner thickness.  Luckily we don't use that many different thickness.
2.  When a user is going to pick off a boot tap, the pick-off program will change the _generic_ volume damper option that the user has chosen to a volume damper option that is _specific_ to the liner thickness.

This should work.  As of whether I can use a similar method to deal with the inset placement of the volume damper, I will need to discuss this with our draftsmen to see if there are other alternatives.

Thanks again.

Jaysom

[cadbob]

I tried getting the guy's in the past to use the Shoe/Boot Tap with Volume Damper, but issue I had was the Square Plate (Volume Damper) Though they can kick it some still can snag up on liner as it is doesn't have the corner notched. The Single Blade that we cut in has 45 degree corners burnt out already so saves some shearing time.

[jaysomlam]

This is a follow up to this thread.

Fabrication 2024 has changed the way to calculate the cut size of volume damper in a boot tap.  Since this version, the cut size of volume damper starts taking into the account of the liner thickness.  The cut size of the damper in a boot tap is calculated in this way:

duct body size minus 2 layers of "Liner Thickness" of the liner minus "Damper Adjust" of the damper

Previously (2023 and older), the cut size of the damper in a boot tap was calculated in this way:

duct body size minus "Damper Adjust" of the damper

This means I will need to reduce the "Damper Adjust" of the damper for boot tap.

By the way, the damper cut size is determined by which version of CAMduct that we use (we only use CAMduct 2024).  This has nothing to do with the version of CADmep.  If we use CAMduct 2024, and CADmep 2023 and 2024, we only need one set of dampers just for CAMduct 2024.

Jaysom