Optimization cross-cut saw
Circular sawing machines in the field of solid wood cross-cutting, which are equipped with workpiece detection and a machine control, which is able to compare the detected workpiece data with specifications and thereby control the cutting process according to requirements. Common to all is that the workpieces are transported through the machine by a feed system, and that these machines are used to pursue a certain wood optimisation objective.
Modern cut-off-saws are equipped with high quality measuring and scanning systems, which implement contactless detection and measuring of the workpiece and then transfer the acquired data to a complex software / machine control for further processing and operational evaluation.
Cut types with optimisation function
Parts list optimisation / part optimisation
The start and end of a workpiece are detected with sensors. The machine always cuts the largest specified length. The next longest fixed length is always sought for any leftover pieces. If the leftover is shorter than the shortest fixed length then this piece is separated off as waste. No consideration is given to the length of waste and further priorities with this optimisation variant.
Part optimisation with waste restriction
Waste pieces are limited to a maximum permissible length. (Further processing, e.g. in finger jointing lines)
With this type of optimisation the machine control combines the specified workpiece dimensions such that the least possible waste is generated.
Full optimisation with consideration to priorities
This is an enhancement of full optimisation. In addition to waste reduction, the control combines the specified fixed lengths, such that certain workpiece lengths are preferred or greater volumes are cut.
A prerequisite for quality optimisation is the labelling of various quality levels on the workpieces. The machine control optimises within individual quality levels; leftovers of one quality are assigned to the next quality level.
The control combines the specified workpiece lengths and cuts preferred lengths with higher prices.
Exception: Cut types without optimisation function
The following two cut types require sensory detection of the workpiece data and a machine control. For this reason they are assigned the optimization cross cut saw (acc. to Höchsmann definition), even if optimisation in the strictest sense does not take place.
The machine processes the specified cutting list. A sensor in the area of the workpiece infeed detects the start and end of the workpiece; first cuts or head cuts are possible. If the leftover is shorter than the target workpiece per the parts list then it is discharged as waste. Typical applications are found in the pallet and crate industry for example.
The machine is equipped with a sensor in the vicinity of the workpiece infeed, which detects signs of defects (e.g. chalk markings) and passes these on to the machine control. Workpiece lengths, widths, quality criteria, values / prices or unit quantities are not taken into consideration here.