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Gentleman Jack

£2.50

Your rating: None (3 votes)

Gentleman Jack-Hammer has a hole to dig. Turn the handle to help him on his way.


Members and Patrons can download this paper animation kit for free at the link. Non-members can join in the fun for £2.50/$3.75

Print out the parts onto thin card. (230 micron / 67lb is about right) Notice that the first three sheets are printed double sided. Print out the page, flip it over and print out the other side on the back.

Score along all the dotted and dashed lines and cut out the holes before carefully cutting out the parts.

 


Making the Box

Fold up the box top and base as shown, note that they are glued slightly differently.


Fold and glue box sides making triangular tubes as shown.


The cam is made from double thickness card. Fold it over and glue it down. Once the glue is dry carefully cut it out.


Thread the cam onto the cam shaft and glue it into position.


Roll round and glue the various axle tube as accurately as possible.


Glue the two axle tubes into place using the grey lines for alignment.


Glue the four parts of the box together. Use the picture to ensure that they are arranged in the correct order.

 


Fold the box round and fit the cam shaft into place.


Glue the box closed.


Make the handle in three steps.


Glue the handle to the cam shaft.


Fold round and glue down the cam follower sides.


Glue the cam follower end into place as shown.


Glue on the push rod.


Thread the push rod up through the hole in the box top. Glue the other end of the cam follower to the back of the box.


Find a small coin - a UK Penny is perfect (20mm diameter 4g weight)

Wrap and off-cut of paper round it and then glue it to the inside of the box.


Fold found and glue the jack-hammer body. Glue in the support on the opposite side to the coin.


Close up and glue the jack-hammer.

Thread in the handle.

Glue the grey area on the push rod to the support inside the jack-hammer.


Roll round and glue the legs.


Assemble the shoes.


Glue the shoes to the legs.


Glue the two legs together. Glue the leg strap in place across the top of the legs.


Glue the feet to the box top.


Curve round and glue down the jacket.


Glue together the top hat.


Make sure you cut round the ears. Glue the nose to the grey area on the face.


Fit the hat to the head.


Score along the grey lines on the arms and crease them as shown.


Roll round and glue the neck inner then glue the collar into place.


Glue the back of the head to the top back of the neck.


Glue in the two body sides.


Trim away the excess from the bottom of the sides.


Glue the collar to the body.


Glue in the three tabs.


Thread in the neck and glue it into place onto the three tabs.


Glue the hands to the jack-hammer handle so that the creases in the arm are the same distance apart as the shoulders.


Complete the model by gluing the arms to the body.

Gentleman Jack-Hammer has a hole to dig. Turn the handle to help him on his way.


Members and Patrons can download this paper animation kit for free at the link. Non-members can join in the fun for £2.50/$3.75

Print out the parts onto thin card. (230 micron / 67lb is about right) Notice that the first three sheets are printed double sided. Print out the page, flip it over and print out the other side on the back.

Score along all the dotted and dashed lines and cut out the holes before carefully cutting out the parts.

 


Making the Box

Fold up the box top and base as shown, note that they are glued slightly differently.


Fold and glue box sides making triangular tubes as shown.


The cam is made from double thickness card. Fold it over and glue it down. Once the glue is dry carefully cut it out.


Thread the cam onto the cam shaft and glue it into position.


Roll round and glue the various axle tube as accurately as possible.


Glue the two axle tubes into place using the grey lines for alignment.


Glue the four parts of the box together. Use the picture to ensure that they are arranged in the correct order.

 


Fold the box round and fit the cam shaft into place.


Glue the box closed.


Make the handle in three steps.


Glue the handle to the cam shaft.


Fold round and glue down the cam follower sides.


Glue the cam follower end into place as shown.


Glue on the push rod.


Thread the push rod up through the hole in the box top. Glue the other end of the cam follower to the back of the box.


Find a small coin - a UK Penny is perfect (20mm diameter 4g weight)

Wrap and off-cut of paper round it and then glue it to the inside of the box.


Fold found and glue the jack-hammer body. Glue in the support on the opposite side to the coin.


Close up and glue the jack-hammer.

Thread in the handle.

Glue the grey area on the push rod to the support inside the jack-hammer.


Roll round and glue the legs.


Assemble the shoes.


Glue the shoes to the legs.


Glue the two legs together. Glue the leg strap in place across the top of the legs.


Glue the feet to the box top.


Curve round and glue down the jacket.


Glue together the top hat.


Make sure you cut round the ears. Glue the nose to the grey area on the face.


Fit the hat to the head.


Score along the grey lines on the arms and crease them as shown.


Roll round and glue the neck inner then glue the collar into place.


Glue the back of the head to the top back of the neck.


Glue in the two body sides.


Trim away the excess from the bottom of the sides.


Glue the collar to the body.


Glue in the three tabs.


Thread in the neck and glue it into place onto the three tabs.


Glue the hands to the jack-hammer handle so that the creases in the arm are the same distance apart as the shoulders.


Complete the model by gluing the arms to the body.

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< | >

Christmas Mice Brought to Life!

Your rating: None (1 vote)

I was delighted to see Michael42er later creation where he has brought to life my new Christmas Mice models using the mechanism from the hopping reindeer model here.

I love it! Thanks for sharing Michael! Festive felicitations to you and yours!

I was delighted to see Michael42er later creation where he has brought to life my new Christmas Mice models using the mechanism from the hopping reindeer model here.

I love it! Thanks for sharing Michael! Festive felicitations to you and yours!

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< | >

Flying Fish

£2.50

Your rating: None (3 votes)

Check out the Flying Fish is animated action on my Instagram feed here This paper animation is based around the Crank/Cam Essential Mechanism and fitted with one of the alternate cams from here. Members can download the model for free, thanks for your support! Non members can join in the fun for $3.75/£2.50

 


The parts are provided in both coloured and un-coloured format. Choose which you would like then print out the parts onto thin card (230gsm is ideal) The coloured sheets are printed front and back. Print out one side, flip it over and return it to the printer to print out the other side.

Score along the dotted and dashed lines and cut out the holes before carefully cutting out the parts.

Some of the parts are made from double thickness card for extra strength. Fold the card over and glue it down. Once the glue is completely dry carefully cut out the parts.

Crank ends:

Cams:

Spacers:

Fins:


Make up the two crank shaft pieces.


Roll round and glue down the axle tubes carefully lining up the edges with the end of the glue area.


Thread the shortest axle onto the two crank ends then glue them to the end of the push rod so that the axle is accurately lined up perpendicular to the push rod.


Glue the crank shaft pieces to the short axle tube. Make sure that it is free to turn.


Glue together the two slider tubes.


Glue the cam follower tube to one of the slider tubes as shown.


Thread the longest axle through the cam follower tube and glue it into position. Glue two of the spacers into position on the top of the slider tube.


Glue the other two spacers to the other slider tube.


Glue the first cam into place.


Glue the second cam to the other side.


Slide the cam follower down the push rod into position. No glue! It must be free to slide up and down.


Slip the other two slider tubes into position.


Make up the two triangular link pieces and glue them to the spacers on the top and bottom slider tube.


Tightly wrap a coin (4 gram, 20mm diameter, a UK penny is perfect!) in a scrap of card.


Glue the coin package to the front of the cam follower to complete the crank/cam assembly.


Making the Box

Fold round and glue down the tabs on the box top and base to make triangular sections.


Fold round and glue down the box sides making right angled triangle sides.


Glue together the four sections of the box. Note that the circular holes are furthest away from the hole in the box top.


Fold round and complete the box making sure that it is straight and true.


Thread the push rod up through the hole in the box top and glue the middle slider tube to the tab.


Line up the crank with the holes in the side of the box and fit the two remaining axles securing them with a small dot of glue.


Assemble the handle in three steps.


Fit the handle to the axle as shown to complete the Crank/Cam mechanism.


Making the Fish

The wings are made from double thickness card.


Glue the wing push rods to the underside of the wings lining them up as shown.


Thread the wing stub through the side of the fish body and glue the fin end into place to stop it falling out.


Glue the two halves of the fish together with the body top in place as shown.


Assemble the body inner.


Glue the body inner into the fish then fit the completed fish over the end of the main push rod. Secure it with a dot of glue.


Turn the handle so that the cam and cam follower are at their maximum height.


With the wings pointing roughly 45 degrees upwards, glue the end of the wing push rods to the top slider tube. Cut off any excess push rod if necessary.


That completes your Flying Fish model. Turn the handle to bring it to life!

Check out the Flying Fish is animated action on my Instagram feed here This paper animation is based around the Crank/Cam Essential Mechanism and fitted with one of the alternate cams from here. Members can download the model for free, thanks for your support! Non members can join in the fun for $3.75/£2.50

 


The parts are provided in both coloured and un-coloured format. Choose which you would like then print out the parts onto thin card (230gsm is ideal) The coloured sheets are printed front and back. Print out one side, flip it over and return it to the printer to print out the other side.

Score along the dotted and dashed lines and cut out the holes before carefully cutting out the parts.

Some of the parts are made from double thickness card for extra strength. Fold the card over and glue it down. Once the glue is completely dry carefully cut out the parts.

Crank ends:

Cams:

Spacers:

Fins:


Make up the two crank shaft pieces.


Roll round and glue down the axle tubes carefully lining up the edges with the end of the glue area.


Thread the shortest axle onto the two crank ends then glue them to the end of the push rod so that the axle is accurately lined up perpendicular to the push rod.


Glue the crank shaft pieces to the short axle tube. Make sure that it is free to turn.


Glue together the two slider tubes.


Glue the cam follower tube to one of the slider tubes as shown.


Thread the longest axle through the cam follower tube and glue it into position. Glue two of the spacers into position on the top of the slider tube.


Glue the other two spacers to the other slider tube.


Glue the first cam into place.


Glue the second cam to the other side.


Slide the cam follower down the push rod into position. No glue! It must be free to slide up and down.


Slip the other two slider tubes into position.


Make up the two triangular link pieces and glue them to the spacers on the top and bottom slider tube.


Tightly wrap a coin (4 gram, 20mm diameter, a UK penny is perfect!) in a scrap of card.


Glue the coin package to the front of the cam follower to complete the crank/cam assembly.


Making the Box

Fold round and glue down the tabs on the box top and base to make triangular sections.


Fold round and glue down the box sides making right angled triangle sides.


Glue together the four sections of the box. Note that the circular holes are furthest away from the hole in the box top.


Fold round and complete the box making sure that it is straight and true.


Thread the push rod up through the hole in the box top and glue the middle slider tube to the tab.


Line up the crank with the holes in the side of the box and fit the two remaining axles securing them with a small dot of glue.


Assemble the handle in three steps.


Fit the handle to the axle as shown to complete the Crank/Cam mechanism.


Making the Fish

The wings are made from double thickness card.


Glue the wing push rods to the underside of the wings lining them up as shown.


Thread the wing stub through the side of the fish body and glue the fin end into place to stop it falling out.


Glue the two halves of the fish together with the body top in place as shown.


Assemble the body inner.


Glue the body inner into the fish then fit the completed fish over the end of the main push rod. Secure it with a dot of glue.


Turn the handle so that the cam and cam follower are at their maximum height.


With the wings pointing roughly 45 degrees upwards, glue the end of the wing push rods to the top slider tube. Cut off any excess push rod if necessary.


That completes your Flying Fish model. Turn the handle to bring it to life!

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< | >

Crank Cam Cams

£0.00

Your rating: None (4 votes)

Cams are really useful when designing moving paper models, change the cam profile and the movement changes telling a whole new story. The Crank Cam Essential Mechanism came with a three lobed snail cam. To make the project more flexible this download is for a couple more cam profiles that can be used in the model. You'll need the Crank/Cam kit, download these cam profiles and you can use them instead of the supplied cam.


There are two new cam profiles included in the download. Both are based on a sine wave delivering a rapid up and down motion in either direction. The three lobed design smooths out the motion compared to the snail cam design in the original design.


The four lobed cam speeds thing up delivering for stokes up and down for each turn of the handle.


Here are the two designs of cams fitted into the box and ready to go.

Download: 
cc-cams.pdf (828 KB)

Cams are really useful when designing moving paper models, change the cam profile and the movement changes telling a whole new story. The Crank Cam Essential Mechanism came with a three lobed snail cam. To make the project more flexible this download is for a couple more cam profiles that can be used in the model. You'll need the Crank/Cam kit, download these cam profiles and you can use them instead of the supplied cam.


There are two new cam profiles included in the download. Both are based on a sine wave delivering a rapid up and down motion in either direction. The three lobed design smooths out the motion compared to the snail cam design in the original design.


The four lobed cam speeds thing up delivering for stokes up and down for each turn of the handle.


Here are the two designs of cams fitted into the box and ready to go.

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< | >

Flying Fish Prototype

Your rating: None (4 votes)

Time to try adding an animated character to the Crank/Cam project! For this rough and ready prototype I put together a simple Flying Fish model. I cut out two identical fish shaped sides and glued them together at the nose and tail. I then glued the fish body to the top of the main push rod.


The fins/wings are made from double thickness card. To make the joint as flexible as possible I slotted the wings through a hole in the body side then glued on strips to stop the wings falling out.


You can see where I have tried different attachment points for the wing push rod. It worked best with the push rod close to the body.


The other end of the wing push rods are connected to the crank driven slider tube making the wings flap quickly as the handle is turned. The result works a treat! I will probably make this into a downloadable project shortly.

Time to try adding an animated character to the Crank/Cam project! For this rough and ready prototype I put together a simple Flying Fish model. I cut out two identical fish shaped sides and glued them together at the nose and tail. I then glued the fish body to the top of the main push rod.


The fins/wings are made from double thickness card. To make the joint as flexible as possible I slotted the wings through a hole in the body side then glued on strips to stop the wings falling out.


You can see where I have tried different attachment points for the wing push rod. It worked best with the push rod close to the body.


The other end of the wing push rods are connected to the crank driven slider tube making the wings flap quickly as the handle is turned. The result works a treat! I will probably make this into a downloadable project shortly.

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< | >

Crank Cam

£2.50

Your rating: None (1 vote)

Crank/Cam Essential Mechanism. Turn the handle and the main push rod turns once per turn of the handle while the slip sleeve move three times per turn. This mechanism is at the heart of the Die Fledermaus model and the Flying Santa projects. Use this Essential Mechanism as the starting point for your own animated character designs or as an exercise in pure mechanism!

Members and Patrons can download the parts for free, make sure that you are logged in then simple click the download link. Thanks for your support! Non-members can join in the fun for £2.50/$3.75


Print out the parts onto thin card. (230gsm / 67lb) I used coloured card for a colourful model. You could use white, coloured or patterned card as you choose. Score along the dotted and dashed lines and cut out the holes before carefully cutting out the parts.


Some of the parts are made from double thickness card for extra strength. Fold them over and glue them down. Once the glue is dry carefully cut them out.

Cams

Cranks Ends

Spacers


Assemble the two crank sections.


Roll up and glue the four axle tubes lining up the edges with the points of the triangles as accurately as possible.


Thread the two crank ends onto the shortest axle tube and glue them to the marked area on the push rod. The axle tube should turn freely in the crank ends.


Glue the crank pieces to the axle tube as shown.


Assemble the slider tubes.


Glue the cam follower holder to one of the slider tubes.


Glue the longest axle so that it is centred in the cam follower tube.


Glue two of the spacers to the top of the follower assembly.


Glue the other two spacers to the other slider tube.


Slide one of the cams onto the crank. Make sure that it is oriented the same way as in the picture. Glue it to the side of the crank piece.


Glue the other cam into position as shown.


Slide the cam follower assembly down the push rod as show. It should move freely up and down the push rod.


Slip the other slider tubes into position.


Assemble the two long links. Use them to link together the spacers on the slider tubes as shown.


Find a small coin. (20mm diameter / 4 grams) A UK penny is ideal. Wrap it tightly in an off-cut of card.


Glue the coin to the front of the cam follower assembly in the position shown.


Fold up and glue the two sides.


Fold up and glue the box top and box base.


Glue together the four sections of the box as accurately as possible. Note that the circular holes are closest to the base piece.


Fold round and glue the box.


Thread the push rod up through the hole in the box top and glue the lower slider tube to the tab.


Fit the two remaining axles in through the box holes into the crank.


Assemble the handle in three steps.


Glue the handle into place to complete the model.


The completed model


What animated character will you design for yours?

Crank/Cam Essential Mechanism. Turn the handle and the main push rod turns once per turn of the handle while the slip sleeve move three times per turn. This mechanism is at the heart of the Die Fledermaus model and the Flying Santa projects. Use this Essential Mechanism as the starting point for your own animated character designs or as an exercise in pure mechanism!

Members and Patrons can download the parts for free, make sure that you are logged in then simple click the download link. Thanks for your support! Non-members can join in the fun for £2.50/$3.75


Print out the parts onto thin card. (230gsm / 67lb) I used coloured card for a colourful model. You could use white, coloured or patterned card as you choose. Score along the dotted and dashed lines and cut out the holes before carefully cutting out the parts.


Some of the parts are made from double thickness card for extra strength. Fold them over and glue them down. Once the glue is dry carefully cut them out.

Cams

Cranks Ends

Spacers


Assemble the two crank sections.


Roll up and glue the four axle tubes lining up the edges with the points of the triangles as accurately as possible.


Thread the two crank ends onto the shortest axle tube and glue them to the marked area on the push rod. The axle tube should turn freely in the crank ends.


Glue the crank pieces to the axle tube as shown.


Assemble the slider tubes.


Glue the cam follower holder to one of the slider tubes.


Glue the longest axle so that it is centred in the cam follower tube.


Glue two of the spacers to the top of the follower assembly.


Glue the other two spacers to the other slider tube.


Slide one of the cams onto the crank. Make sure that it is oriented the same way as in the picture. Glue it to the side of the crank piece.


Glue the other cam into position as shown.


Slide the cam follower assembly down the push rod as show. It should move freely up and down the push rod.


Slip the other slider tubes into position.


Assemble the two long links. Use them to link together the spacers on the slider tubes as shown.


Find a small coin. (20mm diameter / 4 grams) A UK penny is ideal. Wrap it tightly in an off-cut of card.


Glue the coin to the front of the cam follower assembly in the position shown.


Fold up and glue the two sides.


Fold up and glue the box top and box base.


Glue together the four sections of the box as accurately as possible. Note that the circular holes are closest to the base piece.


Fold round and glue the box.


Thread the push rod up through the hole in the box top and glue the lower slider tube to the tab.


Fit the two remaining axles in through the box holes into the crank.


Assemble the handle in three steps.


Glue the handle into place to complete the model.


The completed model


What animated character will you design for yours?

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< | >

Crank/Cam Prototype - Almost Complete

Your rating: None (4 votes)

I've completed the layout of parts for this Crank/Cam Essential Mechanism. The final tweaks to the cam profile have made the finished mechanism run beautifully smoothly. As the handle is turned the main orange push-rod traces out an almost circular path above the box top.


The pink cams move the yellow cam follower up and down on the push rod three times for each turn of the handle.


The mechanism will make a really interesting starting point for your own paper animation characters, especially as a flying model where the character's wings flap briskly and the character rocks back and forth. Next step, assembly photography then I'll release the completed kit.

I've completed the layout of parts for this Crank/Cam Essential Mechanism. The final tweaks to the cam profile have made the finished mechanism run beautifully smoothly. As the handle is turned the main orange push-rod traces out an almost circular path above the box top.


The pink cams move the yellow cam follower up and down on the push rod three times for each turn of the handle.


The mechanism will make a really interesting starting point for your own paper animation characters, especially as a flying model where the character's wings flap briskly and the character rocks back and forth. Next step, assembly photography then I'll release the completed kit.

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< | >

Prototype Crank/Cam Essential Mechanism.

Your rating: None (3 votes)

The Essential Mechanisms are a set of paper mechanisms that you can use as starting points for your own animated paper models. I'm working on a new addition to the set. The Crank/Cam mechanism is based on the mechanism used in the Flying Santa and the Die Fledermaus model. The crank turns one revolution per turn of the handle meanwhile the cam turns at a higher speed. That means that we can have, for example, a flying pig that smoothly moves up and down whiles the wings flutter frantically.


Here's the first draft of the main mechanism. The three lobed cams drive the cam follower up and down three times for each turn of the crank. The cam follower can then be connected to a set of wings, arms or whatever you choose to bring the model to life. The drive is running a little stiff at the moment so I'll be making a couple of changes before the next prototype. Meanwhile, why not download one of the other Essential Mechanisms to keep you going while you wait?

The Essential Mechanisms are a set of paper mechanisms that you can use as starting points for your own animated paper models. I'm working on a new addition to the set. The Crank/Cam mechanism is based on the mechanism used in the Flying Santa and the Die Fledermaus model. The crank turns one revolution per turn of the handle meanwhile the cam turns at a higher speed. That means that we can have, for example, a flying pig that smoothly moves up and down whiles the wings flutter frantically.


Here's the first draft of the main mechanism. The three lobed cams drive the cam follower up and down three times for each turn of the crank. The cam follower can then be connected to a set of wings, arms or whatever you choose to bring the model to life. The drive is running a little stiff at the moment so I'll be making a couple of changes before the next prototype. Meanwhile, why not download one of the other Essential Mechanisms to keep you going while you wait?

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< | >

Paper Knight: Sir Cranksalot Prototype

Your rating: None (6 votes)

You may have noticed the first draft of Moving Knight model - Sir Cranksalot - on my Instagram Feed.

Below, are a few more details showing how the model is planned to work.


The base is a modified version of the Mesh Gear Crank Essential Mechanism. I've extended out the top and base to make the box 20mm deeper then added a cam to the crank shaft to drive the sword arm.


There is a pull strap running from the sword arm down to the weighted cam follower. As the cam drops the arm is pulled up.


Side view of the cam follower.


The body is hinged to the legs at the front then connected to the cam shaft push rod at the back. As the cam turns the body rocks back and forth. As the cam has four lobes the Knight swings his sword four times for each full turn of the crank,


The cam profile needs some work but overall not bad for a first draft!

You may have noticed the first draft of Moving Knight model - Sir Cranksalot - on my Instagram Feed.

Below, are a few more details showing how the model is planned to work.


The base is a modified version of the Mesh Gear Crank Essential Mechanism. I've extended out the top and base to make the box 20mm deeper then added a cam to the crank shaft to drive the sword arm.


There is a pull strap running from the sword arm down to the weighted cam follower. As the cam drops the arm is pulled up.


Side view of the cam follower.


The body is hinged to the legs at the front then connected to the cam shaft push rod at the back. As the cam turns the body rocks back and forth. As the cam has four lobes the Knight swings his sword four times for each full turn of the crank,


The cam profile needs some work but overall not bad for a first draft!

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< | >

Keyboard Kat

£2.50

Your rating: None (10 votes)

Keyboard Kat! Turn the handle and the cat tickles the ivories whilst nodding along to the beat! Members and Patrons can download the parts for free at the link. Non-members can join in the fun for £2.50

Click the picture to the left to see the model in animated action on my Instagram feed.

Once you have downloaded the parts, print out the pages onto thin card. (230grm/67lb) are ideal. The colour version is printed on both the front and back of the page. Print out the front of a page, flip it over and return it to the printer then print out the back.

Once the ink is completely dry, score along all the dotted and dashed lines, cut out the holes then carefully cut out the parts.


The base and top are basically the same but the top has this extra hole in it. Fold in the sides to make right angle triangles then glue them down.


Fold in the end tabs on the end pieces to make triangular tubes.


Glue the cam follower spacer to the underside of the top between the two small marks on the top.


Glue the box ends to the box top. Note the alignment and position of the end with the holes, it is important that it is fitted the right way round.


Fold round the box and glue it down.

Glue in the side flaps.


Fold in the small tabs and glue them to the inside wall of the box.


Roll up and glue the four tubes lining up them as accurately as possible with the edge of the glue area.

There are various parts that are double thickness card shown below. Fold them round and glue them down as shown. Once the glue is dry carefully cut out the parts.


The three cam followers are all made the same way.

Fold over the main body and glue it down to make double thickness card.


Fold round the tab at the end to make a small triangle tube


Fold up the stiffener as shown


Glue the stiffener to the cam follower.


A small coin (20mm diameter, 4gm weight) is used as a weight for each of the cam follows. I used UK pennies. Fold a scrap of card tightly round the coin and glue it down as shown.


Glue the coin to the end of the cam follower.

Fold the tab with the triangle piece under the cam follower and glue it down.


The three cam followers completed.


Fit the cams to the square cam shaft. The single lobed cam fits in the centre. The two lobed cams should be at ninety degrees to each other. I didn't glue them so that I could try different cam profiles at a later date. Glue one of the axle tubes into the square tube. Don't fit the other one yet.


Assemble the handle in three steps.


Thread the cam shaft into the box then fit the final axle tube into place on the right side of the picture. No need to glue it, friction will hold it into place.


Thread the three cam followers into the box above the cams and glue them to the box end as shown.


Glue the handle into place. The view from the other end. Turn the hand and the cam followers should move up and down.


Assemble the two arm axles as shown.


Glue a strap to each arm axle.


Fold a body sides round an arm axle and glue it closed. When you pull the strap the arm axle should turn. Make up the other body side in the same way but with the pull strap on the other side of the axle.


Join the two body sides using the body front as show. The pull straps should be at the back of the body on both sides.


Roll the body right round and glue it down.


The arm parts. Note that the left and right arm parts are different, don't mix them up. Shown here are the left arm parts.


Fold found and glue the upper arm. Glue the lower arm to the back tab on the upper arm.


Glue the upper and lower arm together.


Glue the arm cover into position. (This part is the same on both arms.) Make up the other arm in the same way.


Gently open out the hole in the arm with a chop stick or other suitable implement.


Both arms assembled.


Turn the arm axles so that the internal swing arm is horizontal then glue the arm onto the axle so that the forearm is also horizontal.


The black line on the head is not a mouth, it is actually a slot for a strap to fit through!

Thread the final strap through it and glue to the inside of the head.


Assemble the nose and whiskers and glue them into place.


Work your way round the head gluing the front of the sides.


Glue on the ears.


Thread the head strap down through the hole on the body then glue the head to the body.


Assemble the stool.


Glue the stool to the box.


Thread the three straps through the hole on the legs then glue the legs to the body.


Thread the straps down through the hole in the stool and out through the back of the box.


Fitting the straps to the cam followers is the same process for each cam.

Turn the cam until the cam follower is at its maximum height. Pull the strap so that the forearm is horizontal and mark with a pencil where the strap meets the cam follower. Cut off the excess strap approximately 5mm below the mark then crease the strap at the pencil mark. Glue the strap to the cam follower.


Assemble the keyboard as shown.


Fit the keyboard to the box so that the keyboard is under where the arms fall naturally.


With the arms at their lowest point you may need to make small adjustments by gently bending the forearm so that they just touch the keyboard.


Glue the tail to the cat, and glue the name plate across the front of the box to complete the model.


Once the glue is dry, turn the handle to bring the Keyboard Kat to life!

Keyboard Kat! Turn the handle and the cat tickles the ivories whilst nodding along to the beat! Members and Patrons can download the parts for free at the link. Non-members can join in the fun for £2.50

Click the picture to the left to see the model in animated action on my Instagram feed.

Once you have downloaded the parts, print out the pages onto thin card. (230grm/67lb) are ideal. The colour version is printed on both the front and back of the page. Print out the front of a page, flip it over and return it to the printer then print out the back.

Once the ink is completely dry, score along all the dotted and dashed lines, cut out the holes then carefully cut out the parts.


The base and top are basically the same but the top has this extra hole in it. Fold in the sides to make right angle triangles then glue them down.


Fold in the end tabs on the end pieces to make triangular tubes.


Glue the cam follower spacer to the underside of the top between the two small marks on the top.


Glue the box ends to the box top. Note the alignment and position of the end with the holes, it is important that it is fitted the right way round.


Fold round the box and glue it down.

Glue in the side flaps.


Fold in the small tabs and glue them to the inside wall of the box.


Roll up and glue the four tubes lining up them as accurately as possible with the edge of the glue area.

There are various parts that are double thickness card shown below. Fold them round and glue them down as shown. Once the glue is dry carefully cut out the parts.


The three cam followers are all made the same way.

Fold over the main body and glue it down to make double thickness card.


Fold round the tab at the end to make a small triangle tube


Fold up the stiffener as shown


Glue the stiffener to the cam follower.


A small coin (20mm diameter, 4gm weight) is used as a weight for each of the cam follows. I used UK pennies. Fold a scrap of card tightly round the coin and glue it down as shown.


Glue the coin to the end of the cam follower.

Fold the tab with the triangle piece under the cam follower and glue it down.


The three cam followers completed.


Fit the cams to the square cam shaft. The single lobed cam fits in the centre. The two lobed cams should be at ninety degrees to each other. I didn't glue them so that I could try different cam profiles at a later date. Glue one of the axle tubes into the square tube. Don't fit the other one yet.


Assemble the handle in three steps.


Thread the cam shaft into the box then fit the final axle tube into place on the right side of the picture. No need to glue it, friction will hold it into place.


Thread the three cam followers into the box above the cams and glue them to the box end as shown.


Glue the handle into place. The view from the other end. Turn the hand and the cam followers should move up and down.


Assemble the two arm axles as shown.


Glue a strap to each arm axle.


Fold a body sides round an arm axle and glue it closed. When you pull the strap the arm axle should turn. Make up the other body side in the same way but with the pull strap on the other side of the axle.


Join the two body sides using the body front as show. The pull straps should be at the back of the body on both sides.


Roll the body right round and glue it down.


The arm parts. Note that the left and right arm parts are different, don't mix them up. Shown here are the left arm parts.


Fold found and glue the upper arm. Glue the lower arm to the back tab on the upper arm.


Glue the upper and lower arm together.


Glue the arm cover into position. (This part is the same on both arms.) Make up the other arm in the same way.


Gently open out the hole in the arm with a chop stick or other suitable implement.


Both arms assembled.


Turn the arm axles so that the internal swing arm is horizontal then glue the arm onto the axle so that the forearm is also horizontal.


The black line on the head is not a mouth, it is actually a slot for a strap to fit through!

Thread the final strap through it and glue to the inside of the head.


Assemble the nose and whiskers and glue them into place.


Work your way round the head gluing the front of the sides.


Glue on the ears.


Thread the head strap down through the hole on the body then glue the head to the body.


Assemble the stool.


Glue the stool to the box.


Thread the three straps through the hole on the legs then glue the legs to the body.


Thread the straps down through the hole in the stool and out through the back of the box.


Fitting the straps to the cam followers is the same process for each cam.

Turn the cam until the cam follower is at its maximum height. Pull the strap so that the forearm is horizontal and mark with a pencil where the strap meets the cam follower. Cut off the excess strap approximately 5mm below the mark then crease the strap at the pencil mark. Glue the strap to the cam follower.


Assemble the keyboard as shown.


Fit the keyboard to the box so that the keyboard is under where the arms fall naturally.


With the arms at their lowest point you may need to make small adjustments by gently bending the forearm so that they just touch the keyboard.


Glue the tail to the cat, and glue the name plate across the front of the box to complete the model.


Once the glue is dry, turn the handle to bring the Keyboard Kat to life!

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