There is now another way to download and make the kits from robives.com.
As well as memberships, the ricomplete download or individual downloads I'm pleased to announce that I have set up account with Patreon.

How it Works.
As a patron you choose how much you would like to pledge for each of the models I design. You can change the amount whenever you want and you can cancel at any time. 
I usually produce between two and four new models per month. As a patron you can set a monthly maximum pledge so that you never go above your budget.
Your Rewards.
As a patron you will be able to download the file of the parts and instructions so you can print out and make each of the models that I design. There are loads of different extra rewards for different levels of support - you can see them on the Patreon site
Click here and get started now!


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Weeee! I'm Spinning!

Latest in a long line of mash-ups from the ever delightful Mr Cool! Thanks for sharing!


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Tue 30th Jun 2015

June 30th 2015 is one second longer than a usual day!

Use your leap second wisely with the leaping dog model!


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Mon 29th Jun 2015

Here's another of the pop-up cards that I recently designed for Brother International.

They have made it available as a free download on their website here.

Have fun!


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The original Phono Horn project is also downloadable on the Instructables website here

Subscribers to the Instructables website have shared their comments and photos of their versions of the project on the site. The latest comment is from Andrew Spencer who says
"I didn't have any cardstock, so I made it out of soda cans! It really works!"
The final result looks great! Thanks for sharing Andrew!


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Fri 26th Jun 2015

I've produced a set of pop up cards for Brother International's Creative Center. They are free for everyone to download at the Brother site.

I'll be adding the links to each of them over the next few days. first of all : The Pop Up Lion.

I hope you enjoy it!


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£2.50
Download Gear Up
Become a Member for free access to this and other files on the site.
See the Membership page for more details.

Already a Member? Log in Here

Gear Up! Turn the handle and the big gear with twenty nine teeth drives the smaller eleven tooth gear.
The small pinion is geared up by almost three times the speed.
This Essential Mechanism can be made as a pure mechanism or as a starting point for other character based automata. Have fun!


Check out the video of the model in action.

As an Essential Mechanism all paid members can download the parts of this model for free. Thanks for signing up! Non-members can join in the fun for £2.50

Print out the parts onto thin card. I used a combination of white and coloured card to make a colourful model.
Score along the dotted and dashed lines and cut out the holes before carefully cutting out the pieces.


All the parts ready to go.


Fold over and glue down the gears to make double thickness card. Once the glue is dry carefully cut out the parts. There are detailed instructions on making gears here.


Fold up and glue the box sides making right angled triangle tubes.


Fold round and glue the tabs on the box top and the box base making equilateral triangle tubes.


Glue the sides to the box top. Note that the holes in the sides are closest to the top piece.


Glue the base into place.


Glue down the side tabs to close the box.


Fit the box inner into place under the box top. Note that in this picture the box is upside down.


Roll round and glue down the two axle tubes lining up the edges with the points of the arrows as accurately as possible.


Thread the small gear onto the square axle tube and glue it down lining it up with the grey centre line.

Fit the gear onto the 'Small Gear' axle.


Drop the axle down through the two holes in the box top. The gear should be free to turn easily.


Assemble the handle in three steps.


Glue the handle to the 'Big Gear' shaft.


Thread the axle through the box as shown.


Glue the shaft stub into place in the large gear.


Complete the model by gluing the large gear to the axle.


Turn the handle and watch the small gear spin!
There is something really satisfying about watching gears meshing, I love it!


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Gear Up. Most of my previous gear models have been reduction gears. As the handle is turned, the output gear turns slower. It is easier to gear down as the relative amout of force on each gear goes up each time you gear down. This means that any friction in the system is easily overcome. Sometimes, however, you just need to gear up!

To that end I have put together this trial mechanism. The large gear has twenty nine teeth, the small gear has eleven giving an almost three to one speed increase. To overcome any problems with friction I have made the axle hole for the small gear very slightly oversize. 8.5mm rather than 8mm.

If you click on the image to the left you will be able to see an Instagram video of the gear in action.

I'll be putting the gear together as a downloadable project very shortly. Meanwhile, you can follow progress on Instagram.

 


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Paper gears need to be flat to work properly, here's how to make sure your gears come out correctly. The gear I will show you is the 23 tooth gear from the Mesh Gear Crank.

Cut out the rectangle containing the gear and fold it in half. Spread a thin layer of glue evenly on one side of the card. I use PVA - white school glue


Fold over the card and rub the two halves down firmly over the full area of the side.


Put a couple of sheets of card down onto a flat surface such as a cutting board on a table.

Lay the gear in the middle of the card and place a couple more sheets of card on top of it.


Weight the resulting sandwich down with a heavy book.

Leave the gear to dry for at least half an hour. If the sandwich card appears to be damp it is worth swapping it out for a couple of new pieces and letting the gear dry for a further half hour or so.


Once the gear is completely dry, carefully cut out the spoke holes...


...and the hole in the centre of the gear.


Using the sharp knife, cut along the bottom of the gear teeth.


Cut right round the outside of the gear.


Then, with your scissors, cut out the rest of the teeth.


One gear, ready to go!


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£2.50
Download Twitch Mouse
Become a Member for free access to this and other files on the site.
See the Membership page for more details.

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Twitch Mouse. An animated model to download and make. Turn the handle and the mouse twitches his cute little nose! Awww!


You can see the mouse in action on this YouTube clip.


Paid members can download the parts for free from the link. Thanks for signing up. If you are not a member you can join in the fun by becoming a member here or by paying £2.50 to download this kit via the shopping cart.

Download the parts and print them out onto thin card. (230gsm / 67lb) There are two version of the model. Colour and un-coloured. The coloured model is printed on both sides of the sheet. Print the front, flip the card, return it to the printer then print the back.

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


Fold round and glue the cam shaft outer.


Fold over and glue down the cam to make double thickness card. Once the glue is dry carefully cut it out.


Fit the cam to the cam shaft outer lining it up with the grey line.


Roll up and glue down the two round tubes lining up the edge with the points of the triangles.


Fold round and glue together the cam follower.


Glue the flap to the cam follower then wrap it round the short tube and glue it down.


Wrap a small coin (20mm diameter - 4gram weight) tightly in an off-cut of card.


Glue the coin in position on the cam follower.


Assemble the handle in three steps as shown.


Fold round and glue the tabs on the box tops . The triangle tubes are right angled triangles.


Fold the tabs round on the box sides and glue them down making equilateral triangle tubes.


Glue the side to the base. Note that the holes in the sides are closest to the base.


Glue the top into position and glue the box closed.


Hold the square tube in position and push the the circular tube into place. No need to use glue as friction will hold it into place.


Glue the push-rod to the cam follower.


Thread the push rod up through the hole in the box top and glue the cam follower to the front of the box.


Complete the box by gluing the handle into place.


Roll round and glue down the head of the mouse. Glue up the darts in the two ears.


Glue the front legs to the body front.


Glue the two parts of the body back together.


Glue the two pieces of the body together using the grey area for alignment.


Glue on the back legs. Glue the tail to the back of the body.


Glue the head tab to the front of the body. The mouse head will be free to nod up and down.


Turn the handle on the box so that the cam is at its lowest position. Glue the head tab to the push rod so that the head is level or slightly downward pointing.


That's it! Once the glue is dry, turn the handle and the Twitch Mouse twitches his cute little nose.

There's a block of cheese to make as well - hey, it is a mouse.


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