A zero degree operating pressure angle gearing system includes an external gear and a mating gear.
The inventive gearing is characterized in that a mating gear (7) is provided, and driving pins (5) are shaped on a lateral face of the toothed band (2) that engage inside recesses (6) of the mating gear (7).
Accordingly, rotating the drive shaft rotates the mating gear and vertical shaft thus raising or lowering the rack.
The mating gear has a mating-gear tooth number (N2) satisfying the expression N2 = mG .
This may be made, for instance but not exclusively, placing a torsion spring between the two links, whose extension is adjusted by a motor, through a worm screw and mating gear.
The present invention also includes a control method which has as its objective to control the position of, not the torque applied to, one of the spindles, usually the gear member spindle.
N1 and a second plurality of teeth, each tooth having a second-tooth profile.
In this method, the gear member spindle position is controlled relative to the pinion member spindle position by means such as computer numerical control (CNC).
As the pinion member is turned at some speed, the gear member is kept in coordination with the pinion (according to their ratio) by the CNC control.
The gear member spindle can be commanded to include additional rotational components which, in effect, advance or retard the gear rotation relative to the pinion.