Experience. It beds to about 90°. Any less angle and you just have to stop the action with the trigger to "halt" the bend. I just made one sample jig with the correct angle I wanted, and used it as a guide. Simple.
This machine do not cut rebar,it's only for rebar bending. it's mainly depend on the diameter of rebar .(unit :mm)
Ø22- Ø25 1 pcs
Ø16- Ø20 1-2 pcs
Ø10- Ø13 4-5 pcs
Ø6- Ø13 3-6 pcs