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Published bySavanah Cleverly Modified over 2 years ago

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Hopper bevels True Mitre angle EDGE True face angle FACE Hopper bevels are made up of Compound Mitres. These are angled on both the face and the edge of boards as in the hopper exercise used in this Presentation Compound mitres are often used in Shop display fittings, to form sloping window beds and display units. Some times the display item has more than four sides. This makes it a little more difficult, but setting out the angles uses the same theory.

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**1. Identify the pivot point PIVOT POINT**

Typical hopper shape 1. Identify the pivot point We establish a pivot point which is an edge upon which the angled side can pivot.

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**We lay a side down to get a view of it from above**

PIVOT POINT 2. Lay down the side.

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PIVOT POINT 2. Lay down the side.

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PIVOT POINT 2. Lay down the side.

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PIVOT POINT 2. Lay down the side.

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PIVOT POINT 2. Lay down the side.

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**3. Look from above to get the true shape**

We look at it from above so we can project down and create a plan view or True Shape of the side PIVOT POINT 3. Look from above to get the true shape

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**3. Look from above to get the true shape**

We look at it from above so we can project down and create a plan view or True Shape of the side 3. Look from above to get the true shape True Shape of Side

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**Follow the steps in the next set of slides Print out the slide notes**

pages first

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**First Draw an elevation and plan view of the hopper HEIGHT OFF SET**

See your trainer for the sizes of the hopper. It will have a height and off set. The offset is the distance the hopper is tilted out or in. If the corners on the hopper are all the same. When setting out for the angles and bevels you will only need to draw one corner. You need to get the the vertical height and off set correct. The offset is the tilt in or out of the side.

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**1. Extend the base line Extend the base line Pivot point**

1. Extend the base line from the pivot point using a “T” square. Make sure it is long enough.

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**= thickness of side material**

Pivot point 2. Set the thickness of the material 2. Measure up from the base line the thickness of material and with a”T” square mark in the thickness of the material.

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**= thickness of side material**

2 1 2 = thickness of side material 1 Pivot point 3. Number corners and drop down lines with a compass 3. Number the corners. Then use a compass from the pivot point extended to point 1 to mark a curve down to the base line. Keeping the compass point at the pivot point extend the compass to point 2 and mark a curved line down to the thickness of the base line.

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**= thickness of side material**

2 1 2 Join 1 to 2 = thickness of side material 1 Pivot point 4. Join points 1 & 2 From the base line join the new points 1 & 2

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**5. Extend point 3 to the thickness line 2 1**

Bring up point 3 to the thickness line 2 Join 1 to 2 = thickness of side material 3 1 Pivot point 5. Extend point 3 to the thickness line 5. Using a compass again from the pivot point, extend it out to point 3 and rotate it up to the thickness line. Note: be very careful, sometimes it can be difficult to locate the new point 3 accurately.

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**6. Join Pivot Point to the new point 3 2 1**

Join pivot point to new point 3 2 Join 1 to 2 = thickness of side material 3 1 Pivot point 6. Join Pivot Point to the new point 3 6. Join the pivot point to the new point three. This line should be parallel to the line 1,2. If its not you will have trouble setting out the correct mitre angle

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**7. Drop down the lines. Drop down lines 2 1 3 2 3 1 Pivot point**

From the newly established points 1, 2 & 3 drop vertical lines down. Drop down lines

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**8. Extend the corners 1 to 1 2 to 2 3 to 3 2 1 3 2 3 PP hasn’t moved 1**

Note all corners have been numbered 8. 2 to 2 3 to 3

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**9. Join the points, a. 1 to 2 c. 3 to pivot point d. Pivot point to 1**

PP hasn’t moved 1 9. Join the points, a. 1 to 2 1 1 2 2 3 b. 2 to 3 9. Join up the points 1 to 2, then 2 to 3, then 3 to the pivot point and finally from the pivot point back to the start at point 1. c. 3 to pivot point d. Pivot point to 1

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2 1 3 2 3 PP hasn’t moved 1 TRUE FACE ANGLE

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**10. Overlay thickness of material across mitre 2 1 3 2**

10. Overlay the true thickness of the material across the plan view of the mitre at 900 to the plan view of the mitre. You should have a slight rectangle NOT a square if you have been accurate. true thickness of material

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**11. Mark a diagonal to find the true mitre angle 2 1 3 2 1**

Extend the lines to make it easier to set up a sliding bevel and get an accurate mitre angle. true thickness of material

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THE END

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