/diy/ - Do It Yourself

My threadmill's control board fried, and I'm trying to build a half-assed one with speed controlled by a knob. I have AC-AC PWM chopper, a FBR (since motor is 220v ac), and when it's connected, motor turns fine and all. Question tho - what do I do to prevent dips in speed when load is applied (like when I step on a threadmil)? Is it mostly supply current dependant, or should I look into building some feedback circuit (or just say f*ck it and buy some control board)? Pic semi related