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The scotch yoke is a simple, effective mechanism for converting rotary motion (the handle round the back) into reciprocating motion (the yoke and slider at the front). This project allows you to make your own working mechanism and learn how it works first hand. Members can download the parts for free, non-members for £2.50
Find out more about the scotch yoke mechanism here and here
Print the four parts sheets onto thin card. Score along the dotted and dashed lines and cut out the holes before carefully cutting out the parts.
Fold round and glue up the axle and the pin. Fit them in place in their respective holes in the wheel piece.
Fold the wheel piece in half and glue it together to make double thickness card. Make sure it stays flat as it dries. One the glue is dry carefully cut around the circle.
Glue the pin tab to the wheel 1mm above the wheel.
Roll the tab round tight and glue it down to make a circular pin.
Glue the two box sides to the box body as shown above.
Fit the box inner into place so that it runs across the centre of the box on either side of the hole.
Fold the box round and glue it together.
Make up the two box ends, thread the bushes through the holes in the box sides and glue them into place.
Thread the wheel through the box. Fix it into place using the washer. It must be free to rotate.
Fit the yoke vertical to one of the two shafts. Use the grey area for alignment. Repeat the process with the other half of the yoke.
Glue the two ends to the yoke vertical...
...and complete the yoke.
Fit one of the box sides into place on the end of the box. Line up the tab edge with the edge of the box to make sure that it is straight and square.
Thread the yoke into place as shown.
Fit the other end of the box into place making sure that it is straight and square.
Assemble the handle in three steps. Fold the two halves round and glue them to make two square section tubes. Fold one tube into the other and glue it down. Roll the long tab round and glue it down.
Complete the project by gluing the handle into place.
Turn the handle and the yoke/slider will move back and forth! Scotch yoke!
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A poseable paper faerie to download and make. This project has arms that can rotate at the shoulder and bend at the elbow as well as a poseable head. Members can download the project for free, non-members can download it for a small fee.
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| Poseable Head | Poseable Arms |
Print out the parts onto thin card (230gsm / 230 micron) Score along the dotted lines and cut out the holes before carefully cutting out the parts.
Roll up and glue down the neck tube. Note that it rolls round itself twice.
Glue one of the thin slip rings onto the grey area at the top of the neck. Wrap the wider ring round the neck and glue it to itself. The wider ring should be free to rotate round the neck.
Glue the second narrow ring into place to trap the rotating ring on the neck.
Roll round the tabs and glue them to the neck.
Roll round the head inner and glue it together. Fit it over the tabs on the top of the neck.
Glue the covers into place being sure that the head inner can still rock back and forth.
Roll round and glue together the two legs as shown. Glue the shoes into place so that they are pointing slightly outwards.
Glue the two legs together with the two long tabs at the top of the legs opposite each other.
Fit the nose into the back of the head.
Roll the head round and glue it together.
Glue together the three parts of the hair.
Weave the long hair stands over each other and glue them together approximately halfway along their length.
Glue the hair to the head using the tabs along the top of the head. Note that the top of the head fits just behind the start of the fringe.
Assemble the shoulders as shown above.
Fit the shoulder tabs into the holes in the body. Fit the covers into place on the tabs making sure that the shoulders are free to rotate.
Roll round the body and glue it together.
Fold up the neck support as shown.
Glue the neck support into the top inside of the body.
Glue together the hand to make it double thickness then carefully cut it out. Shape it slightly for a more realistic appearance.
Glue the elbow tabs to the inside of the arm.
Fit the hand into place.
Fit the second arm cover into place making sure that the elbow joint moves freely.
Tricky bit. Fit the tabs into the arm holder. With a cocktail stick apply a tiny dot of glue to the two tabs and to the centre of the tab piece. Press the circular cover into place. You must make sure that no glue squeezes out from the tabs as this part need to be free to rotate.
Glue the arm tabs to the rotating centre.
Fit the completed arm into the shoulder. A pair of tweezers is useful to nip the tabs into place.
Repeat the process with the other arm.
Fit the head inner into the head so that it runs side to side. Line it up so that the chin is lifted slightly.
Fit the neck into the neck holder.
Done! Pose your faerie and send in pictures!
There is a choice of colour or mono version.
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A picture is worth a thousand words. Moving pictures must be worth at least twice that. To that end, I'm creating a YouTube video explaining the best techniques for making paper toys from printing and aligning to scoring and cutting. The Agreeable Sheep seemed like the perfect subject for such a video but just needed a few small changes. And so, for your cutting and sticking pleasure, I present here, a slightly updated version for you to follow along with at home. YouTube video soon.
Print out the parts onto thin card (230 micron / 230 gsm is perfect)
Score along the dotted and dashed lines then cut out the holes before carefully cutting out the parts of the model then follow the instructions for construction below.
Not one to stand out of the crowd, our woolly friend agrees with everything you say...
"Is this a good colour scheme?"
"Yes!"
"Would you like to go for a walk?"
"Yes!"
"Are you having a good time?"
"Yes!"
"Does my bum look big in this?" ...probably best not to ask. With this agreeable model you need never get a second opinion again.
Baa baa baa!
Fold up the two triangular sections on the box sides to make right angled triangles.
Glue the two box halves together.
Glue on the lid. Note that the hole in the box top goes to the front of the model.
Fold the two flaps on the base down and glue them into place.
Fold in and glue the four vertical flaps to form triangular tubes one of which is arrowed above.
Fold up and glue together the body inner. Glue it to the inside of the body in the position shown.
Fold round and glue down the other side of the body.
Fold up and assemble the head.
Glue the tab on the neck to the inside of the head.
Fold the coin holder round a single 20mm diameter coin roughly 4 grams in weight (One UK Penny is perfect for the job)
Glue the penny to the inside of the cam follower then glue the cam follower closed.
Assemble the push rod tube. Glue the large tab on the end of the push rod to the inside of the cam follower so that the edge is lined up with the edge of the cam follower arrowed above.
Thread the push rod up through the hole in the top of the box then glue the tab on the back of the cam follower to the back of the box as shown above.
Fold of the cam to make double thickness card then carefully cut it out.
Assemble the axle and thread the cam onto it gluing it down onto the grey areas.
Thread the axle into the box lining up the green ends.
Assemble the handle in three steps. Fold up the two square sections. Glue one section into the other. Roll round and glue down the long tab.
Glue the washers to the axle then glue the handle into place.
Glue the push rod to the head so that the crease in the tab lines up with the end of the neck tab arrowed.
Glue the four feet to the box using the grey pads for alignment.
Complete the model by gluing the neck to the front of the body. Turn the handle to see the sheep nod.
Now that wasn't so bad was it?
What do you mean, "Yes"?
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I'm delighted to announce that the Levers eBook is now available on the website. Thank you for all the support and feedback I've had while I've been putting this together, it is really appreciated!
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