Drills are made and designed to "drill" ....
It's one thing to be creative and "adapt" a tool for a specific need, BUT a whole 'nother thing to use it outside of it's original purpose.
Fist off the mount is not stable.
Second, the cut off piece should never be on the fence side of the blade when crosscutting and trapped within.
Finally, the drill does not spin fast enough to safely cut through wood when used in this manner.
If this is your invention, I would not use it in this manner. There are better ways to build a small table saw. My first table saw when I was 18 years old was an inverted Skil saw in a small stamped steel table. It had a crappy fence and was unsafe, but I had no idea really how bad it was. The table was actually an option from the factory, so I gave it no further though regarding safety. Now, I know better!
You Tube has many DIY table saw builds and some are reasonable, others are not. I understand being on a budget, and keeping costs to a minimum, BUT not at the expense of losing your fingers. :frown2:
The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)