Let's Make Robots!

Mounting brackets for SRF05 (Open letter to Jack / DAGU)

SRF05 is still IMHO the best low-cost distance sensor.

And there is still no good / smart / fancy / easy / pro / cheap way to mount the darn thing on a turning neck / servo / front..

We now have a good contact to DAGU from China who makes cheap and cool robot-stuff.

So.. I thought.. Why don't we make some suggestions to how we would like such a mounting thing(ey) shaped and made? And then ask Jack from DAGU if he could start producing it?

This was my idea.. and now I need your help and ideas towards the design :)

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If you have a laser cutter on your bench, then go for it. otherwise dig out the exacto knife.

It is not a question of whether you can make one or not. It's the old question of how much is your time worth? And what else could you be doing creatively?

The same argument goes for making your own pcbs versus sending them out. Ask Chris is he could have made as quality a pcb as he received from the boardhouse.

It is a personal choice. No slaps necessary.


Wham! Product has landed!


Could we apply the same design priciple to a product whose purpose is to connect two servos perpendicular to one another such that they provice two degress of freedom to ... whatever the thing is which is attached to the other end?

I think this would mka e great "other" LMR product.

Good idea. We could base it on the same design. Modifying a single bracket from the DAGU sensor mount so that is can solidly mount a servo without anything interfering with a servo horn attachment.

If you look at the picture 4 in the image below of Oddbot's mini servo mount for the DAGU sensor bracket, it might be as simple as removing the sides of the bracket, and providing a mounting point for the "horn" side of the servo.  You would leave the top bracket off entirely.


I imagine it might be necessary to re-inforce the bracket if it doesn't have the sides to add stability.

The more I think of it, the less I like this approach.

Maybe I'd just glue a couple of the servos together and call it done. ; j 

Ok.. Did you just make that drawing to make that comment?

Serious respect if so!

Anyway, mu humble contribution, from project TIRDNKWIIT (wrongly pronounced by some as "turd'n quit"), this close up, that I just thought may be of some inspiration:


(No it's not two axels, but it gives an idea of the "what to lock's, and a way to do it", on the servo on the left)

The drawing was borrowed from this awesome website.
Ya, absolutely not my work. It was Oddbot's!
Oh, cool site, cool work, skilled folks there! :D

Yes! This is EXACTLY what I'm talking about. This is similar to what I did in my biped. The standard cheap R/C servos we mostly seem to use on LMR definitely needs a bearing on the opposite side as per Frits' working model.

What I propose is two versions of what Frits made: one identical to the above and another where the servos are rotated 90 degrees to one another in the x axis of his photo.

...or maybe just one which can be manually rotated in the middle.

This would form the joints in robot arms and legs, the joints between sections of caterpillars (or snakes), 2D pan/tilt heads. Armed with a fistfull of inexpensive servo couplings like these, there are no limits.


 Here's my version. It was a surprising pain in the ass to cut those holes out of aluminium accurately.

Nifty mount for the SRF005 and the SHARP IR Sensor