Opitec 108.661 User manual

1
E108661#1
Stool,
with woven seat
108.661
Please Note
The OPITEC range of projects is not intended as play toys for young children.
They are teaching aids for young people learning the skills of Craft, Design
and Technolo- gy.These projects should only be undertaken and tested with
the guidance of a fully qualified adult. The finished projects are not suitable to
give to children under 3 years old. Some parts can be swallowed. Dan- ger of
suffocation!

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1. Information:
Article: Stool design with woven seat in constuction pack format
Use: In Design Technology, Key stage 3/4
2. Material information:
Material: Pine (Coniferous) softwwod
Wood should be relatively dry before working
Working: Wood can be shaped, planed, sawn, drilled and sanded. Measure out
according to the plan or use the patterns.
Joining: Simple wood joints using dowels-PVA glue
Finish: Wax (Liquid or solid)
Wood varnish ( Base and top coat)
Staining ( Water soluable-colour) then varnish
Linseed
3. Tools:
Saws: Use an adjustable mitre saw or a Tenon saw for straight cuts in wood or
dowels
Note: hold work securely
Sanding: Use glasspaper and block for flat surfaces and sheet glasspaper for curves.
Drilling: Use a hand drill or Pillar drill
Note: Remember to keep the safety rules, tie all long hair back,
remove rings and jewellery, no loose clothing. Wear an
apron and use safety glasses. Hold all work to be drilled
securely in a machine vice.
4. Parts List
Part Material Quantity Size Diagram
Leg Pine 4 30 x 30 x 350 mm
Rails Pine dowel 8 15 dia x 275 mm
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2
'Please be aware that you use your
finished stool at your own risk'

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5. Exploded diagram
6. Planning overview
6.1 Planning and making the stool legs
6.2 Making the cross rails and assembling the stool
6.3 Weaving the seat
6.1 Planning and making the stool legs
6.1.1 Take care whem marking out the position of the holes in the legs, ensure that they are all marked out
together at the same time.
Note: Use a Try square to check the accuracy of your measurement.
The holes should be drilled exactly 15mm deep so that the distance between the legs
will be correct.
Either chamfer or round the top of the legs
15
5
Ø 1515
5
20
Ø 15
150
350
30 30
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1
1
1
2
2
2
2
2
2
2
2
1
chamfer round

6.2 Assembling the parts
6.2.1 Saw the dowels (2) to 265mm long
Mark out and saw a 45 degree mitre the on each end of the dowel as shown, be careful that they do
not slip or turn during this stage.
Note: The dowels must all be cut accurately to the same length so that the distance between
the stool legs is accurate.
6.2.2 Insert the dowels (2) into the holes in the stool legs and check that they fit correctly
6.2.3 Insert the dowels into the holes in the legs (1) one beech, one dowel (2) as shown in the diagram and
glue them in position.
Note: Check the assembled parts for squareness
6.2.4 Once you are satisfied, assemble the rest of the frame.
Note: Check the completed stool frame again, to ensure that it is steady and does not rock.
Use a ruler to measure the diagonals, check to see if they are of equal length.
Clean up any excess glue with a damp cloth. Leave the stool to dry before weaving the
top
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45°
saw blade
wooden block
2
2
2
2
2
2

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6.3 Weaving the seat of the stool
General:
These instructions show you how to weave the top in a chessboard patttern
To weave the seat you need approx 30 metres of cord 0.35mm diameter for each direction. The cord is
NOT included in this pack and must be ordrered separately
We recommend using two contrsasting colours so that the pattern is easy to see. Of course you can use a
single colour if you wish.
Note: The weaving consists of 13 stripes each made up of 4 strands which are separated by a
gap (2 turns).
The cord must be applied evenly and pulled tight with each turn.
A cross member made of thin wood (which cn be removed) will stop you from winding
the cord to tight and will make the application of the next layer easier
To ensure that your work is accurate we suggest marking out 13 equal spaces on the
dowel with a pencil
6.3.1 For the first colour cut off approximately 30 metres of cord.
(For ease of use the cord can be applied in two lengths of 15 metres)
Firstly tie and knot one end of the cord around one of the rails near a back leg (See diagram) Then
wind the cord back and forth between the two upper rails as shown in the diagram. Carry out this ac-
tion 4 times
Note: In this band there are only 3 strands underneath!
6.3.2 Now wind it twice around the front rail ( dia 1) and then around under the rear rail. This time wind it on
the rail in the opposite direction. (dia 2) and pull it tight. Then cross the cord underneath the so that it
can be wound on again in the original dierection
6.3.3 Now wind the cord a further four times around the dowel rails and repeat step
6.3.2
dia.: 1 dia.: 2 dia.: 3
dia.: 3.1
veuw from underneath

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6.3.4 To produce the pattern in the opposite direction the 30 metres of cord can be divided into 3 lengths,
this will make it easier to handle
Tie the end of the cord (2nd layer) to the end of the first cord (1st layer). Then guide it under to the left
over the first band and under the second, over the third and under the fourth etc. until you reach the
dowel on the left hand side. Then from underneath around the top of the dowel and weave the cord
back in the same way. Repeat this action 4 times.
6.3.5 Wind it twice around the dowel rail then stagger the pattern (firstly underneath, then over etc) Wind it
twice around the left hand rail, pull tight and then from underneath weave the cord back to the right
( Diagram 3/3.1) Then on top weave this new pattern back again. Repeat four times!
Note: Each new band is started staggered in relation to the last (under,over etc)
6.3.6 Finally finish the at the end by tying it to the starting cord (Loosen from dowel) tie the ends and tuck
them into the woven pattern underneath.

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7. Stool legs
Front / side/ plan view
M 1 : 2
15
5
Ø 1515
5
20
Ø 15
150
350
30 30
1

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8. Further patterns:
Note: To make the folowing patterns it is a necessity that an odd number of bands are woven
( Best is to use the 13 bands as described in the chessboard weave) as in the previous
first description
8.1 Diagonal pattern or Herring bone pattern
- First layer as before ( Chessboard pattern )
- Cross direction
1 Band over 2, under 2 over 2 under 2 etc
2 Band over 1, under 2 over 2 under 2 etc
3 Band under 2, over 2, under 2, over 2 etc
4 Band under 1, over 2, under 2, over 2 etc
5 Band the same as band 1 etc
8.2 Diamond pattern
- First layer as before ( Chessboard pattern )
- Cross direction
1 Band under 2, over 2, under 2, over 1 under 2, over 2, under 2
2 Band under 1, over 2, under 2, over 3, under 2, over 2, under 1
3 Band over 2, under 2, over 2, under 1, over 2, under 2, over 2
4 Band over 1, under 2, over 2, under 3, over 2, under 2, over 1
5 Band same as 1
6 Band same as 2
7 Band same as 3
From here the pattern must be worked backwards (Band 6- band 1)
8.3 Brokem diamond pattern
- First layer as before ( Chessboard pattern)
- Cross direction
1 Band over 1, under 2, over 2, under 3, over 2, under 2, over 1
2 Band over 2, under 2, over 2, under 1, over 2 ,under 2, over 2
3 Band under 1, over 2, under 2, over 3, under 2, over 2, under 1
4 Band under 2, over 2, under 2, over 1, under 2, over 2, under 2
5 Band same as band 1
6 Band same as band 2
7 Band same as band 3
From here the pattern must be worked backwards ( 6 Band-1 Band)