The main goal of the sawmill is to get the maximum profit of raw material. Now, this trend is getting stronger. If the sawmill uses old technology and equipment, it can’t exist. One of the main value measures is a yield of a log. There are several ways how to improve this factor, the most effective way – is the PC-based optimization of sawing on the basis of 3G modelling. In this way, the optimization operates individually for each log. The modern computer equipment allows modelling all stages of the log by searching hundreds of possibilities and accounting for the yield of log and its cost, and also takes into account the allowance for edge and processing limits of the equipment.
Our company developed Software for the following sawmill stages:
- Optimizations of log turn when feeding to the chipper canter of the first line. Scanner VECTOR 3D displays the log model. Sawmill parameters, sawing scheme, cross-cutting parameters, processing allowance of equipment are specified only once when sawing schedule changing or when initial setting. The running sawing schedule, allowance for an edge, timber list and cost are specified by technologists when sawing schedule changing or when necessary. When modelling sawing and simultaneously rotating the log we find the angle with maximum yield and cost of timber. The received optimum angle is set by PC in a task for a controller that operates according to this task. All these operations take a tenth of a second and without the intervention of an operator. The effect is 3-7 % depending on crookedness and out-of-roundness of a log.
- Axial and angular centre displacement of half-timber has the influence on to yield of the log. The more crookedness the more profound the effect is.
- Optimization of shaping machine. Along the length of this section is selected the most useful position and the brightness of sideboard for each side of half-timber.
As a result, we can see the increase of yield by 20-25%.