They are produced by adjusting the distance between the gear cutting tool called the hobbing tool and the gear in the production stage. In commercial machinery, it is most common to use a portion of an involute curve as the tooth profile.Įven though not limited to spur gears, profile shifted gears are used when it is necessary to adjust the center distance slightly or to strengthen the gear teeth. In recent years, it is usual to set the pressure angle to 20 degrees.

The unit to indicate the sizes of spur gears is commonly stated, as specified by ISO, to be “ module”. Generally speaking, when two spur gears are in mesh, the gear with more teeth is called the “gear” and the one with the smaller number of teeth is called the “pinion”. On the other hand, spur gears have a disadvantage in that they easily make noise. Also, because of the ease of production, these gears can be made to a high degree of precision. Since the tooth surfaces of the gears are parallel to the axes of the mounted shafts, there is no thrust force generated in the axial direction. Because of their shape, they are classified as a type of cylindrical gears.

The SPG-8260-W will generate TTL-level Word Clock Output.Spur gears are the most easily visualized common gears that transmit motion between two parallel shafts. If the selected reference is lost, the SPG-8260-W switches to its internal oscillator without disturbing the outputs when the selected reference returns, the SPG-8260-W locks back to the input reference.

The SPG-8260-W can lock to one of the two frame references, the card local reference input, or free-run using the SPG-8260-W internal oscillator. The delay is in increments of the output’s interface sampling frequency (74.25MHz, 74.25/1.001MHz or 27MHz) up to 1 frame of video. Each pair of outputs can be independently delayed relative to the incoming reference. The SPG-8260-W sync pulse generator provides 4 pairs of outputs with each pair independently programmed to be either tri-level sync or a composite signal. Outputs tri-level and Color Black on 4 independent pairs of outputs with a dedicated Word Clock output.

Clock gear generator