Proportional reduction of mouldings By Greg Cheetham Original given mould New mould proportionally...
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Transcript of Proportional reduction of mouldings By Greg Cheetham Original given mould New mould proportionally...
![Page 1: Proportional reduction of mouldings By Greg Cheetham Original given mould New mould proportionally reduced.](https://reader036.fdocuments.us/reader036/viewer/2022082816/56649d205503460f949f58f8/html5/thumbnails/1.jpg)
Proportional reduction of mouldings
By Greg Cheetham
Original given mould
New mould proportionally reduced
![Page 2: Proportional reduction of mouldings By Greg Cheetham Original given mould New mould proportionally reduced.](https://reader036.fdocuments.us/reader036/viewer/2022082816/56649d205503460f949f58f8/html5/thumbnails/2.jpg)
Original given mould
X
Y
Drawer out the original mould on an X,Y grid as shown
![Page 3: Proportional reduction of mouldings By Greg Cheetham Original given mould New mould proportionally reduced.](https://reader036.fdocuments.us/reader036/viewer/2022082816/56649d205503460f949f58f8/html5/thumbnails/3.jpg)
Original given mould
Required new height of mould
Required new width of mould
Drawer in line A across extremities to establish line for proportional reduction.
Then
Line B parallel to Line A to set a new height and width as required for new height and widths
Line A
Line B
![Page 4: Proportional reduction of mouldings By Greg Cheetham Original given mould New mould proportionally reduced.](https://reader036.fdocuments.us/reader036/viewer/2022082816/56649d205503460f949f58f8/html5/thumbnails/4.jpg)
Original given mould
Use a compass from XY intersection to transfer points 1 an 2 to X, Y line as shown.
1 2X
Y
2
1
Project new points 1 and 2 as indicated with arrowed lines
![Page 5: Proportional reduction of mouldings By Greg Cheetham Original given mould New mould proportionally reduced.](https://reader036.fdocuments.us/reader036/viewer/2022082816/56649d205503460f949f58f8/html5/thumbnails/5.jpg)
Original given mould
Drawer diagonal as indicated
![Page 6: Proportional reduction of mouldings By Greg Cheetham Original given mould New mould proportionally reduced.](https://reader036.fdocuments.us/reader036/viewer/2022082816/56649d205503460f949f58f8/html5/thumbnails/6.jpg)
Project original height and width lines to diagonal and then project down or across as required
Original given mould
![Page 7: Proportional reduction of mouldings By Greg Cheetham Original given mould New mould proportionally reduced.](https://reader036.fdocuments.us/reader036/viewer/2022082816/56649d205503460f949f58f8/html5/thumbnails/7.jpg)
Original given mould
Required new height of mould
Required new width of mould
Firm in the outline of the proportionally reduced moulding
![Page 8: Proportional reduction of mouldings By Greg Cheetham Original given mould New mould proportionally reduced.](https://reader036.fdocuments.us/reader036/viewer/2022082816/56649d205503460f949f58f8/html5/thumbnails/8.jpg)
Original given mould
Required new height of mould
Required new width of mould
New mould proportionally reduced