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Why does my Yarbo keep missing the same spot?

If the same patch is long every week, the robot is almost certainly not skipping it at random. Something is stopping it reaching that ground, and the same thing stops it every time.

The short answer A repeated miss has a cause that repeats. The three usual ones are an obstacle the robot backs away from, ground where it cannot trust its position and refuses to work, and a plan that never covered the patch in the first place. They look identical from the kitchen window and completely different on a map of where the robot actually went.

Why the same patch, every time

A robot mower does not choose to skip ground. It either never routed over it, or it routed over it and something turned it around.

Something in the wayCOMMON
A garden chair, a hose reel, a low branch, a car that is parked in the same place most days. The robot detects it, avoids it, and the grass in its shadow never gets cut. Move it once and the patch fixes itself.
It cannot trust where it isSKY VIEW
Under trees, beside a wall or a roofline, the robot's position becomes unreliable. It will not do precise work it cannot place, so it leaves. Clearing what is overhead, or routing through the spot differently, is the fix.
It was never in the planMAP
The zone boundary stops short of the patch, or a no-go zone drawn for something that has since moved still covers it. Nothing is wrong with the robot at all.

Seeing which one it is

Yardstick records what your Yarbo did rather than what it was asked to do, so the answer is a map rather than a guess.

  • Missed grass draws the ground the robot was meant to cover and did not, in red, over the route it actually drove. A patch that is red week after week is the thing to look at.
  • Cells with 3+ passes tells you how much of the yard was covered three or more times, which is the difference between a job that finished and a job that ran out of battery.
  • Trouble spots groups the repeated failures by what you would do about them, so an obstacle and a signal problem never end up in the same list. Each trouble spot shows Last: with the date and time it last happened, and a Details button opens every visit the robot made there, with the date and time, what went wrong, and a time-of-day chart.
The Trouble spots panel: places grouped by cause, each with how many visits hit the same problem.
Trouble spots. Each line is a place, how big it is, how far from the dock, when it last happened (Last:), and how many separate visits ran into the same thing there.
Why repeat visits matter One bad reading is a bird. The same 20 ft patch failing on six of its six visits is furniture, or a tree. Yardstick counts the visits so you can tell the difference without standing in the yard watching.

What to do about it

  1. Find the patch on the map

    Turn on Missed grass and look for red that is in the same place as last week. A miss that moves around is a battery or a route problem, not a place problem.

  2. Check what the trouble list calls it

    If it appears under sky view, the fix is overhead. If it appears as something in the way, the fix is on the ground and is usually an object you can pick up. Check Last: to see when it last happened, or press Details to see every visit by date and time, what went wrong on each one, and a Visits by hour (yard time) chart.

  3. Change the map, not the robot

    If the patch was never in a zone, extend the zone. If an old no-go zone covers it, delete the zone. Both are edits you can make on a computer and save straight back to the robot.

Yardstick is an independent tool for Yarbo robots. It reads what your robot reports on your own network; it does not change how the robot mows unless you ask it to.

Related

🗺

Reading your map

What every layer on the coverage map means.

✏

Editing your map

Reshape a zone or clear an old no-go area from a computer.

🛑

Getting stuck

When the robot stops in the same spot instead of missing it.

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Yardstick is an independent tool for Yarbo robots. Not affiliated with or endorsed by Yarbo Inc. · © 2026 Yardstick Technologies LLC.