Vertical Panel Saws, also known as Wall Saws, are primarily used in applications where space is at a premium. Panels are positioned almost vertically against an inclined frame that is generally positioned against a wall. The saw head traverses and rotates to allow execution of both rip and cross cuts with the same head. This makes the footprint required much smaller than for either a Sliding Table Panel Saw or a Beam Saw. They are generally purchased either as entry level machines by smaller shops, or for specific applications in larger shops. Vertical Panel Saws can be from basic machines with completely manual controls and adjustments to semi-automated machines with programmable controllers. Scoring is done either by means of leading scoring knives, or on more sophisticated machines, with an independent scoring blade. Electrics range from 120/1/60 to three phase.