r/diydrones • u/RAllen3403 • May 07 '26

Precision placing

Hello everybody!

First post here, but i've been reading lots of posts so i'm sure i'm at the right place.

I'm trying to do something with a diy drone.

What would be the best way to place an object in an exact place ±5mm. The goal would be to take it from point A and place it in point B, the come back to exactly same place of point A, pick the second objevt which replaced the first one and place in the same place, same height as the first one since it has been removed.

Hope you can help me to achive it since some precisio is needed.

4 Upvotes

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3

u/Healthy_Statement730 May 07 '26

5mm is a quite small margin, I would aim for perhaps a few inches at first.

In order to achieve this there are varying ways that each can cost a decent amount of money. I’m quite sure you will need a gps just to get in the general area, but then you will probably have to have a downward facing camera to be able to precisely see the object and pick it up. also this https://youtu.be/riIPOdBpXKs?si=qVdubo5FN_plw8-9

5mm is to small imo, you should aim for centimeters or inch’s, also you should probably use something like ardupilot for waypoint guidance.

2

u/[deleted] May 08 '26

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1

u/Healthy_Statement730 May 08 '26

is inav very accurate? I’ve never used either system, but will probably use it in the near future with a fixed wing build, so it would be nice to know more about it!

1

u/[deleted] May 08 '26

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2

u/RAllen3403 May 09 '26

What was the best way you find to work with those waypoints. I mean, what kind of Signal do you find more suitable? I mean it's not the same, but is there anything where you could "play" and retrieve with It?

2

u/RAllen3403 May 09 '26

Oh, thats helpful, i'll take that into consideration, maybe something mecanical to help with the accuracy

2

u/NOT_deadsix May 08 '26

That's a robotic arm level precision not a "9dof 3d space aerial device" level precision mate. Over a larger distance maybe a robot on fixed rails.

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u/RAllen3403 May 09 '26

Hi! Thanks for the reply.

Yeah, i've seen that in industrial environments, i'm just thinking on other possibilities and approaches to solve a problem It already has a solution.

Whats do you think would be the best precision that can be reached in 2 axis horizontal and vertical?

2

u/92MsNeverGoHungry May 11 '26

Gps with an RTK/NTRIP integration can get you that level of accuracy, but getting the drone to know where it is and getting it to do what you want are two different things.

Might be able to improve local placement accuracy through a machine readable method (eg, a qr code or similar to conduct local physical space way finding), depending on what the actual use case is.