Want to build a automatic opening drawer?

could i use a dvd tray as the actuator if it is under a light enough load? what is the max it could probably open?
thanx for any help you can offer


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rickharris6 years ago
Very little power in the DVD tray BUT the principle is good.

A rack and pinion is the traditional way (as in DVD) but you could make arrangements with some string and a motor for example.

Good free running draws on tracks is the key so they are easy to move.

Remember that with a heavy object (eg a FULL draw) the inertia will be considerably increased from when it was empty and light.


T emulate that Smoooth action you so often see in CD players etc look for some smart grease and use a spring to pull the draw open when the catch is released, you will have to push it back though.

Smart grease info here:

http://www.nelsonthornes.com/aqagce/AS%20sample%20material/Head%20of%20Design%20and%20Technology/Product%20Design/AS%20Product%20Design.pdf
JustinJalapeno (author)  rickharris6 years ago
oh okay that makes sense i had a old tray laying around got curious the drawer will only hold 3 lbs give or take a few ounces i need about 6 inches of acutual travel.
id6284 years ago
Would love to have something like this Ikea thing, but much cheaper:

http://www.ikea.com/us/en/catalog/products/30238703/
JustinJalapeno (author) 6 years ago
so with research i have decided against the original curiosty..... naturaully i decided to go with push to open soft close drawer slides im gonna do a step by step for the drawer should be a fun lil project
Burf6 years ago
A DVD tray opener would be much too light to open any drawer that weighs more than a few ounces.
I would suggest you think of a worm gear type garage door opener. Copy the design using an all-thread rod and a large nut. Fasten the nut to the drawer and the all-thread rod to an electric motor. You can scale the sizes to open pretty much any drawer you need. Reverse the direction of rotation of the motor with a switch and it will also close the drawer when you're ready.
JustinJalapeno (author)  Burf6 years ago
thanx allot for your suggestion any threads to follow on how this is done?
None that I am aware of. That doesn't necessarily mean there aren't any, I just haven't seen one.
As for the method, its fairly straight forward, affix the nut to the bottom of the drawer and mount the all thread rod so that a motor can, either directly or indirectly, turn the rod. That will either push or pull the nut depending in the direction of spin of the motor.