Let's Make Robots!

Pan/Tilt from DAGU parts

It pans and tilts
AttachmentSize
pantilt1.bas4.77 KB

I decided to build a pan/tilt mount using the DAGU parts I recently received. I did have a little trouble, but overall I'm pleased with the result.  You may notice some odd servo behavior in the video, This is due to the trouble I mentioned. I over-rotated the pan servo.  It'll never be the same. ; j

 

 PanTilt2009-08-20_059.jpg

The lower servo controls the pan mostion. It is held in a clamp for testing. It is screwed to the nicely spaced mounting holes on the LMR branded DAGU sensor bracket.

You can see the upper servo, which controls tilt motion, in the picture above. A machine screw holds the right side of the two brackets together. I used two nuts tightened against each other to prevent this link from binding. I didn't know if I would need to insert some small washers to help keep the parts moving freely. As it turned out, I didn't need them.

The servo horn is hot glued in place to the inside surface of the upper bracket. I used the round horn from the pack that came with the servo, for maximum surface area for the glue joint. I filled the curved slot from the outer surface of the top bracket with hot glue too, and then used a razor to make sure it was flush so it would't catch. The screw provided for attaching the servo horns mounts through the two round pivot holes to form the left side of the hinge.

Youl'll also notice the little block of wood hot glued in place. This keeps the tilt servo body from rotating relative to the lower bracket.

I might attach some of these parts more firmly in the future, but for the prototype I didn't want to drill any new holes in the brackets, or do anything I couldn't un-do easily. I would have liked some easier way to connect the servo horn to the pivot point of the two brackets. This is an obvious failure point I will want to strengthen.

The PICAXE Basic code that is demonstrated in the video is attached. There are some sound samples in there too. I tried to recreate the Volga Boatmen Song, without much fidelity. I had better luck with the tune from "Close Encounters of the 3rd Kind".

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really cool

I will get one kit too ;)

Very interesting, could you please post a link to where you bought the parts from?

When i goolged DAGU i just found a website that was completle in japanese or chinese, and I couldn't understand what it says

They can be ordered from LetsMakeRobots members Oddbot or Claudia. Look at this post for complete list.

Thank you
So, do you order 2 mounts to make this assembly, or is it a kit with both upper and lower part in it?
Mine came as a set of five pair.  Ten parts in all, with two identical parts making up each of the five mounts. You get a mix of colors (silver, black, and red).  It would have been nice if screws were included, but I'm pretty happy with the kit.
Cool demo, good to see these in operation.

A week ago I suggested the same thing. We are now making an extra bracket to be sold with the sensor brackets for that purpose. They will be available in a few weeks :D

Step.jpg

 

very nice and clean design.

Does it fit standart servos as well or only the miniature ones?

Sory we are only making a bracket for minature servos.