Dear Mark, I followed you guidelines with coils spacing 3 cm and rotation angle of 10 degrees. Well, the focus point in this case is 102.5 cm away from the coil. So I extended the calculation area to the left. Please see the picture attached. The coil coordinate is x=40cm The force to weight ratio at x=0cm is 12. Time spent 1 hour. Best regards, Alex ------------------------------------- Aleksandr Liubimtcev QuickField Support team http://quickfield.com e-mail: aleksandr.liubimtcev@quickfield.com On 24.11.2018 10:29, Mark Arokiaraj wrote: > Dear Alex, > Also we will see the force values with 3X 7T square models with 5 to 10 > degree angulation which could give some good results I guess. > with regards, > Mark