A method of forming a metal bonding layer includes forming first and second bonding metal layers on one surfaces of first and second bonding objects, respectively. 50 M2, on a single traversing and elevating platform. The system also may include a controller that is coupled to the meter and is operable to monitor the range of meter output values and to compute a motor commutation time based upon a monitored local minimum meter output value and a monitored local maximum meter output value. The primary magnetic pole and the secondary magnetic pole face each other so that a direction of a magnetic attraction force generated therebetween and acting on their facing surfaces is different from directions of forces acting, due to an atmospheric pressure outside the housing, on the wall of the housing on which the cover is provided. The catheter balloon assemblies may provide improved tractability andor pushability characteristics.