27th April 2010


If you enjoy the paper engineering projects on the robives.com website, you'll love the membership package. For just £3 a month you get free access to all sorts of exclusive member's content from quick craft projects to complete animated paper models.
Visit the Membership page for more details and to sign up.

Crank / Cam Mechanism – come and get it!

I've completed the parts and instruction for the crank / cam mechanism. This one of two mechanisms I'm trying out for the Dodo model that I'm working on at the moment.
The pdf file is available for premium members to download. Turn the handle and the main shaft moves at the same speed as the handle. The collar, arrowed here, is moved by the four lobed cam at the bottom of the mechanism. It moves up and down four times for each turn of the handle. If you are a premium member you can download the mechanism and full instructions for free at the web site. As this is the naked mechanism, no Dodo as yet, it'll be easy for you to adapt it for your own models. It should work well for any flying character, a bee perhaps or a flying hippo. Download it and have a go, see what character's you can come up with to make the most of this interesting mechanism.

You can see the mechanism in action on the YouTube link below.


Crank/ Cam Mechanism

Premium Membership
YouTube Video


A 55 page ebook aimed at people who teach and people who want to learn! The book centres around ten extendable cardboard engineering projects which introduce many mechanisms, from simple cams to crank sliders and swash plate.

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