Micro DC Motors #1 : A Bit Too Small

RE: Micro DC Motors #1 : A Bit Too Small

ntewinkel — Tue, 12 Mar 2019 04:10:01 GMT

Brilliant!

I tip my tiny hat to you for even attempting to go that small !! [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-4c2fa2cb-6b9a-4023-bf9b-7c70e0713116/contentimage_5F00_1.png:16:16]

Next step: build your own tiny little gearbox to go with it. [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-4c2fa2cb-6b9a-4023-bf9b-7c70e0713116/contentimage_5F00_3.png:16:16]

-Nico

RE: Micro DC Motors #1 : A Bit Too Small

shabaz — Tue, 12 Mar 2019 03:20:03 GMT

Hi Dubbie,

Wow, interesting find. They are tiny!

For larger motors there are 'pinion remover' tools, but perhaps they are not available for such a small size.

The photo below shows the idea, the plate at the bottom needs to fit between the object to remove and the motor, and then the screw thread pushed against the shaft end.. so in theory the motor itself never experiences any force. Perhaps the plate could be replaced, and a small hole drilled in the thread to push a 0.6mm shaft from one of the broken motors.. but is a lot of effort : (

I'd be tempted to buy a cheap pair of pliers, and see if they could be adapted (using a dremel and a cutting wheel) to convert them into a similar thing. But, that's still a fair amount of effort too : ( I guess in terms of time it could be simpler to just take the hit that a few motors will be lost in the removal process! : (

[View:/resized-image/__size/620x481/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-4c2fa2cb-6b9a-4023-bf9b-7c70e0713116/4505.contentimage_5F00_190412.jpg:620:481]

RE: Micro DC Motors #1 : A Bit Too Small

danielw — Mon, 11 Mar 2019 21:27:26 GMT

I had a rummage when I got home tonight to find a link I'd written down some time ago when I was looking at beam robots.

www.robotroom.com click on motors then scroll down to tiny motors. Lots of different ways to remove the weights.

Hope it helps.

Dan.

RE: Micro DC Motors #1 : A Bit Too Small

three-phase — Mon, 11 Mar 2019 20:26:16 GMT

Is it possible to pry the weight off the end of the motor, still holding the body of the motor in pliers or a vice and placing a screwdriver between the weight and the body of the motor, or ideally using two screwdrivers opposite from one another?

Kind regards.

RE: Micro DC Motors #1 : A Bit Too Small

genebren — Mon, 11 Mar 2019 15:32:33 GMT

Dubbie,

It is really a difficult task to remove the counterweight without destroying the motor. I had a very similar success rate when I tried similar motors. They can work, but it is hit or miss.

Good luck as you continue to search for your tiny motors.

Gene

RE: Micro DC Motors #1 : A Bit Too Small

danielw — Mon, 11 Mar 2019 13:45:30 GMT

Nice write up. Good to know how robust or not they are!

I've seen these type motors used before in the toy Micro RC cars where they are really geared down.

I've also seen them on tiny line followers. I Just did a search for an image as they are usually on veroboard, and found this one I've not seen before.

[View:/resized-image/__size/260x189/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-4c2fa2cb-6b9a-4023-bf9b-7c70e0713116/0474.contentimage_5F00_190411.png:260:189]

That is just plain awesome!

Looking forward to seeing more motor mayhem!

Dan.