Now that I know what you are trying to do, try this for practice. For about $15 you can put together something that you can practice with that duplicates the motions that you use when using your table and machine.
Get a dry erase board. We got ours from Lowes, you don't want or need anything fancy. Ours was a 4'x30" sheet of board that we got them to cut into 3 pieces 16"x30" cost was about $11
Get a black large dry erase marker. You need the large one because it's about the size of your handles. Walmart has them under $3 for a 2 pack.
Grab the marker in your fist, like you would hold your handles and practice doing your designs on the board. It sounds hokey, but it really works. You just need to do it with one hand.
In much less time than you think, your motions will begin to smooth and designs will begin to look fluid and quite good. Your speed will improve. I do it while I'm watching TV. It develops muscle memory and within a couple of days you'll start to see a big improvement.