Removing cut parts from the saw and placing them at stations around the saw
Destacking only
- Parts are destacked on to Stations around the Saw
- A Station can be a floor area, semi automatic, or fully automatic machinery
- Parts are placed on baseboards, pallets, runners or a combination of these
In the above example the arrangement is:-
TOP BASEBOARD
PARTS (3x2 5 high)
BOTTOM BASEBOARD
SUPPORT (Pallet)
Baseboards are typically cut to match the overall size of the part destacking layout (often slightly larger to protect the part edges)
In this example the parts are destacked on to the station in a 3 x 2 layout (Top Baseboard not shown).
For Destacking the complete arrangement of - Support, Bottom baseboard, Part layout and Top Baseboard needs to be defined for each Part type in the Part list.
Usually only one part type is destacked to a Station at any time. When all the parts of a type have been cut the station cleared and available for other part types.
Destacking calculations
When a Part list is Optimised the destacking requirements for each part type can affect the Cutting patterns produced. For example, if there is limited space and the maximum number of stations is 5 this also limits the number of parts that can be 'open' as the patterns are cut at the saw. In this case the cutting sequence is set by the Optimiser and it controls the number of Open parts by adjusting the patterns.
Automatic destacking machinery can also place further restrictions on the cutting patterns, for example, some machinery requires that longer pieces are at the front of a strip, or that larger pieces can only go to a fixed station etc.
Once the destacking information is set up for each part type the Optimisers use this to produce a set of cutting patterns and a cutting sequence that takes account of the destacking requirements to avoid bottlenecks and handling problems after cutting.
Baseboard cutting list
The program also calculates (if necessary) the Baseboard sizes for each part type and a Baseboard cutting list.
The Baseboard cutting list is created separately from the main cutting list for parts. It has the same name as the main cutting list with a hyphen appended, for example:-
Cutting list: JOBS32
Baseboard cutting list: JOBS32-
The Baseboard cutting list is optimised separately - usually before optimising the main cutting list.
Methods of destacking
There are two ways of working with Destacking.
Destacking without station sizes - Destacking layouts are set for each part and the part list data is optimised using the standard Optimisers. There are no size restrictions on the stations and the number of open stations is set by the Optimising parameter: Max open parts
Destacking with station sizes - This is most often used for Automatic or Semi-Automatic machinery. In this case there are often a limited number of stations and restrictions on the station size. The stations are set up by the Destacking parameters. Where Destacking parameters are needed the special Destacking optimisers have to be used.
