Made Hand v. Opponent Drawing for a Flush -- Proper Bet Size

[bgpoker2]

I would welcome comments on this.

I was playing in a live cash game recently. It is micro stakes (.17-.34) because I play at a local card room in Serbia and the buy-in is max $25. I was heads up against one opponent and we both had large stacks, probably 6 times the buy-in. I had a set and knew my opponent was drawing to a flush. The pot was pretty large even for this game, so I wanted to protect it. After the turn card did not fill the flush, I put in a 80% pot-sized bet. My opponent, who understands the math of the game, knows me well enough that I have the goods and decided the bet was too much to make the call. He was correct.

My question though is, what is my goal here? To protect a large pot or to induce a bad call? Since my opponent was only 4 to 1 to the flush, I could have bet 50% and he might have called. I scare off a lot of customers in these types of situations, so I was wondering if I should play these types of pots differently.

Thanks.