Nesting
The process of efficiently positioning plate parts in a standard dimension sheet called nest. Distance between parts and nest edge is 20mm. Nesting must be done in such way to reduce material waste. Before starting
- Check project: ShipConstructor » Check 3D Unit DWG and Structure DWGs
- Delete all files from the Nestprts folder
Rules
- Plate name is ‘PLXX’, thickness in 2 digits example: ‘PL06’
- Add callibration plate – in every nest except MDF
- Plate margin 20mm
- Nest gap 20mm
- Nest form- and bending parts together (insert them first by selecting these parts in the plate insert menu)
- When a plate is not full then nest the parts in the left side and/or lower left corner
- Arranging nest lay outs in drawing:
- 5 layouts in a row
- Horizontal distance between layouts 500
- Vertical distance between layouts 1000
- Nesting procedure
- In exceptional situations the margin/gap may be reduced by maximum 5mm, add the ‘Tight Nesting’ warning block to the nest.
Nesting steps
- 01.Set up nest template: ShipConstructor/navigator/templates/Nest01:units:mm, text style : KP arial narrow
- 02.Check stock plate in manager.
- 03.Create the Nest files.
- 04.In every nest file insert nest plate.0,0 insertion point.
- 05.Insert the parts: array individually.
- 06.Nest the parts.
- 07.When nest is done assign the parts to the nest.
- 08.Nest/Check collision.Rearenge parts if necessary.
- 09.Update nest and BOM.
- 10.Add a calibration plates in every nest using tool pallete.
- 11.Delete content of Nestprt from project folder folder after every check nest.
- 12.Navigator/Unit/check nests. If OK you get an overview of all nests and at the end the message :0 parts remain unnested!.
- 13.Empty Nesprt folder.
If after Navigator/Unit/check nests you get results for some or all nets with text : parts moved to REV layer,than the steps are:
- 01.Delete content of Nestprt folder
- 02.Open only nest file where are problems.
- 03.Nest/Check nests
- 04.Nest/Reinsert parts.
- 05.Insert remaining parts if existing and nest them.
- 06.Nest/Check collision.Rearenge if necessary.
- 07.Assign to nest
- 08.Update nest and BOM.
- 09.Navigator/Unit/check nests. If OK you get the message :0 parts remain unnested!.
If the nest is ready and still 1 or 2 parts were modified and you now the thickness and name of the parts than:
- 01.Delete content of Nestprt folder
- 02.Nest/part list/ find the part/ select it and than Nest/ part/Reinsert.
- 03.Assign to nest.
- 04.Update nest and BOM.
Guidelines
- Nest the biggest parts first, the smallest last
- Nest rectangular parts together and curved parts together
- Use the smallest possible sheet for parts >15mm thickness
Note: if several sheet dimensions are used in one nest drawing, it can be useful to draw a temporary rectangle for the sheet instead of inserting a new nest. But NEVER COPY a rectangle from an existing nest and NEVER DRAW the rectangle INSIDE an existing nest since this will give conflicts with the database
Check
- Check if all parts are nested (SC Nesting » Part » Insert deselect Same stock as plate)
- Collision check (especially after re-nesting parts)
- Marking of bending and forming parts in BOM
- Grouping of bending and forming parts
- Presence of callibration part in every nest
- Not full nested plates: parts are nested in left side/lower left corner of plate?
- Run ‘Check’ for every nest
