It's not the table that is vibrating, it is the part that holds the sewing machine, making the machine vibrate or maybe I should use the word "bouncing". That part of the table is what my hubby will reinforce for me. Yes, the Juki is a pretty heavy machine, and I also have the knee lift there, which can also put some pressure on the keyboard table part. But the table is great otherwise, I will definitely use it with a lighter weight machine, see what the difference is. Just been too busy now to be changing machines around. Hopefully will get caught up here soon, maybe send some pix.