I'd like to connect a servo directly to an axle rod (Meccano size). I could probably hack something together but it is likely that one of you has already solved this problem better than cack handed me could manage...
All the couplings I find are expensive professional ones, I need a cheaper solution...
Any ideas?
Looking for “coupling shaft” in eBay shows tons of results for a couple bucks. Is that what you call professional? What’s the budget?
Thanks for that, but none of the coupling shafts on ebay look as if they will fit securely over the tiny toothed wheel of most small servos.
Though yes, €2 is a good price!
Which servo is that? Cheap servo have plastic gears and you should not expect good resistance to high torque requirements.
If torque is small enough, glueing such a shaft coupled to the metallic (or plastic) round adapter that often comes with servo could possibly do
Side note: Any reason to use a servo versus a stepper if you want to drive an axle?
I'd like to use a servo because the interface (electronics and software) is so much easier. Also the weight to drive is not much. And I don't need to keep track of the position, the servo does that for me.
I have all those extras you show in the photo, but none of them, I think, can connect me to a shaft.
I had not thought about gluing, but I don't like the idea much.
Maybe I'll have to do some sort of home made solution... if no one else has solved this problem...
If you pick something like this
With the right diameters on both ends, you can tight them up to the small gear on one end and the axle on the other… you can add superglue if you want to make it even a tighter coupling…
It all depends on the physical requirements
Yes, thanks, I'll have to measure up the servo end well, I'll let you know how it goes...
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