How use servo motor to draw circle

Hi all,
My name Quynh, I live in Viet Nam.

I make some machine using two servo motor: MR-J3, MR-J2 (mitsubishi). Now, I want draw one circle by two motor.

If I have one file CAD, my machine will draw symbol as file CAD.

Please help me,

That's called coordinated motion control, send me your email I got some examples but only with allen bradley.