102 Step feeder
The Step feeder separates the logs. It usually follows after a log deck 101. Its task is to separate the bulk of logs coming from the log deck and load only single pieces onto the following infeed conveyor. The frame in the shape of steps is very steady and massive welded from the steel burnts. The carriage moves against the frame. The carriage is driven by crank-shaft and geared motor. Hydraulic drive is seldom but possible. In general the step feeder has four separating steps. A special step-feeder with only two steps is used for bulk feeding of the short thin logs. The overall width depends on the log length which can vary from 2,5 to 8,0 m. The difference in the size of logs diameter cannot exceed 30%. Usually there is a scraper conveyor 405 for bark handling situated under the step feeder. The step feeder is usually followed by a longitudinal infeed chain conveyor 106, 107, 109, 110.
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