pulsing disk

i do not know if this is the correct forum

the disc pules, but i would prefer if it did not shrink!
i used simple deform

how do i do this?
thanks

Attachments

pulse.2.blend (592 KB)

If I understand correctly.

Turn on lock X and Z axis in the deform modifier, and scale the object up 2X.

thanks very much

I would like there to be text on the top of the disc, so the text is always visible as the disc swells and deflates.
the camera will be facing the disc so all the round disc can be seen
can blender do that?
how do i do it?
thanks all