# Bug in Perimeter Blowing Algorithm- Misses clearing center due to nozzle offset to side **URL:** \ **Category:** Yarbo Blower\ **Created:** [October 16, 2026, 12:28am UTC](https://forum.yarbo.com/t/bug-in-perimeter-blowing-algorithm-misses-clearing-center-due-to-nozzle-offset-to-side/7815 "2026-10-16T00:28:25Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![franktan](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.yarbo.com/franktan/32/7932_2.png) [@franktan](https://forum.yarbo.com/u/franktan)\ **Post date:** [October 16, 2026, 12:28am UTC](https://forum.yarbo.com/t/bug-in-perimeter-blowing-algorithm-misses-clearing-center-due-to-nozzle-offset-to-side/7815/1 "2026-10-16T00:28:25Z")
@Yarbo-Forum I have a long driveway that I use the Yarbo blower to clear using “Perimeter” option. It starts from the center and blows leaves outside the perimeter all along the driveway. It works well, but leaves behind a center “mohawk” strip of unblown leaves. The reason is that the blower starts from the center line and blows leaves to the outside of the perimeter/driveway, which is correct. BUT, the blower nozzle is offset to the right, in both directions, the right side offset nozzle creates a missed path right down the center, half of the center strip in one direction, the other half from opposite direction. The solution to fix this is to create an overlap at the start/center of the perimeter to adjust the offset blower nozzle. To be precise, when the rover is blowing in either direction along the center line of the perimeter for the initial first pass, it needs to offset itself to the left of center line by exactly the width of of the blower. ![IMG_3714](https://canada1.discourse-cdn.com/flex007/uploads/yarbo/original/2X/d/d383ba9b263c59ccaf30ac6ec0527385f64b54a1.jpeg) ---
**Author:** ![abbeys-02betaken](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.yarbo.com/abbeys-02betaken/32/8021_2.png) [@abbeys-02betaken](https://forum.yarbo.com/u/abbeys-02betaken)\ **Post date:** [October 16, 2026, 1:25am UTC](https://forum.yarbo.com/t/bug-in-perimeter-blowing-algorithm-misses-clearing-center-due-to-nozzle-offset-to-side/7815/2 "2026-10-16T01:25:01Z")
Agreed. Very frustrating. It does similar things when using paralell mode, where the left side is not cleared even if that side is also a target (i.e. blowing leafs to either side of the driveway). Bigger issue, related: Is the inefficiency of only having 12’ spacing between runs. The leaf blower can easily blow 3-4 feet – we are not mowing lawn or running a snow blower. The width of the airstream means we should be able to make LESS passes and not run out of battery power so quickly. ---
**Author:** ![abbeys-02betaken](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.yarbo.com/abbeys-02betaken/32/8021_2.png) [@abbeys-02betaken](https://forum.yarbo.com/u/abbeys-02betaken)\ **Post date:** [October 16, 2026, 1:47am UTC](https://forum.yarbo.com/t/bug-in-perimeter-blowing-algorithm-misses-clearing-center-due-to-nozzle-offset-to-side/7815/3 "2026-10-16T01:47:34Z")
An inefficient work-around would be if the app allowed the second pass “work twice” go parallel while the first does spiral (or reversed). That way, even with the utter inefficient blowing, it would clear the long driveway cleanly. ---
**Author:** ![franktan](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.yarbo.com/franktan/32/7932_2.png) [@franktan](https://forum.yarbo.com/u/franktan)\ **Post date:** [October 16, 2026, 1:50am UTC](https://forum.yarbo.com/t/bug-in-perimeter-blowing-algorithm-misses-clearing-center-due-to-nozzle-offset-to-side/7815/4 "2026-10-16T01:50:43Z")
Hahaha. Great minds think alike… That was exactly what I tried after getting the unintentional “mohawk” strip on my driveway, but yeah, the app does not allow the 2nd pass to be a different blowing algorithm. ---
**Author:** ![abbeys-02betaken](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.yarbo.com/abbeys-02betaken/32/8021_2.png) [@abbeys-02betaken](https://forum.yarbo.com/u/abbeys-02betaken)\ **Post date:** [October 16, 2026, 1:55am UTC](https://forum.yarbo.com/t/bug-in-perimeter-blowing-algorithm-misses-clearing-center-due-to-nozzle-offset-to-side/7815/5 "2026-10-16T01:55:00Z")
I would even be happy if they allowed memory paths like the trimmer module. Then I could just drive down the center of driveway offset 2 mower widths or whatever and have that run before the sprial. So, @Yarbo: 1. Can you fix the routing for spiral and parallel to not skip areas because the leaf blower blows to the right? 2. Can you add additional spacing since it can easily do a 48" path each pass, it does not need to drive over every inch and it is running out of battery way too soon for light leaf loads. 3. Can you add memory paths to the leaf blower module? ---
**Author:** ![bryan.wheeler](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.yarbo.com/bryan.wheeler/32/215_2.png) [@bryan.wheeler](https://forum.yarbo.com/u/bryan.wheeler)\ **Post date:** [October 16, 2026, 1:55am UTC](https://forum.yarbo.com/t/bug-in-perimeter-blowing-algorithm-misses-clearing-center-due-to-nozzle-offset-to-side/7815/6 "2026-10-16T01:55:55Z")
I wish the blower nozzle was articulating like the original concept was. Would be far more efficient for driveways, sidewalks, and patios. They could easily make an attachment that diffuses the exhaust out multiple directions (left, center, right). Or something to that effect. ---
**Author:** ![abbeys-02betaken](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.yarbo.com/abbeys-02betaken/32/8021_2.png) [@abbeys-02betaken](https://forum.yarbo.com/u/abbeys-02betaken)\ **Post date:** [October 16, 2026, 1:56am UTC](https://forum.yarbo.com/t/bug-in-perimeter-blowing-algorithm-misses-clearing-center-due-to-nozzle-offset-to-side/7815/7 "2026-10-16T01:56:41Z")
And rear-mounted so it could do cleanup with the mower module on. 🙂 ---
**Author:** ![bryan.wheeler](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.yarbo.com/bryan.wheeler/32/215_2.png) [@bryan.wheeler](https://forum.yarbo.com/u/bryan.wheeler)\ **Post date:** [October 16, 2026, 1:57am UTC](https://forum.yarbo.com/t/bug-in-perimeter-blowing-algorithm-misses-clearing-center-due-to-nozzle-offset-to-side/7815/8 "2026-10-16T01:57:17Z")
Oh how I’ve been waiting for this to become a reality. ---
**Author:** ![abbeys-02betaken](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.yarbo.com/abbeys-02betaken/32/8021_2.png) [@abbeys-02betaken](https://forum.yarbo.com/u/abbeys-02betaken)\ **Post date:** [October 16, 2026, 1:59am UTC](https://forum.yarbo.com/t/bug-in-perimeter-blowing-algorithm-misses-clearing-center-due-to-nozzle-offset-to-side/7815/9 "2026-10-16T01:59:56Z")
To me, the leaf blower is useless for sidewalks the way it is now. Unless I want to drive over the lawn or in the garden to blow. ---
**Author:** ![bryan.wheeler](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.yarbo.com/bryan.wheeler/32/215_2.png) [@bryan.wheeler](https://forum.yarbo.com/u/bryan.wheeler)\ **Post date:** [October 16, 2026, 2:01am UTC](https://forum.yarbo.com/t/bug-in-perimeter-blowing-algorithm-misses-clearing-center-due-to-nozzle-offset-to-side/7815/10 "2026-10-16T02:01:13Z")
Exactly, and it was one of the reasons I bought the leaf blower so that I could blow off the driveway, sidewalks, and patio autonomously. ---
**Author:** ![Yarbo-Forum](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.yarbo.com/yarbo-forum/32/126_2.png) [@Yarbo-Forum](https://forum.yarbo.com/u/Yarbo-Forum)\ **Post date:** [October 16, 2026, 8:56am UTC](https://forum.yarbo.com/t/bug-in-perimeter-blowing-algorithm-misses-clearing-center-due-to-nozzle-offset-to-side/7815/11 "2026-10-16T08:56:37Z")
Thanks for your feedback. I’ve passed your feedback to our product team ---
**Author:** ![Yarbo-Forum](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.yarbo.com/yarbo-forum/32/126_2.png) [@Yarbo-Forum](https://forum.yarbo.com/u/Yarbo-Forum)\ **Post date:** [October 16, 2026, 8:58am UTC](https://forum.yarbo.com/t/bug-in-perimeter-blowing-algorithm-misses-clearing-center-due-to-nozzle-offset-to-side/7815/12 "2026-10-16T08:58:22Z")
I’ve also received your feedback and suggestions. I’m sorry I can’t provide a definite answer at this time, but I’ll share them with our product team for consideration. ---
**Author:** ![damandrake2](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.yarbo.com/damandrake2/32/279_2.png) [@damandrake2](https://forum.yarbo.com/u/damandrake2)\ **Post date:** [October 17, 2026, 11:45am UTC](https://forum.yarbo.com/t/bug-in-perimeter-blowing-algorithm-misses-clearing-center-due-to-nozzle-offset-to-side/7815/13 "2026-10-17T11:45:43Z")
I also have a long and steep driveway as much as I enjoy the blower it only blows to one side of the mapped area. So I have one side completely clear and the other has a line a leaves along the edge. I do use reverse blowing however it would be great to clear both sides completely. ---
**Author:** ![steve](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.yarbo.com/steve/32/816_2.png) [@steve](https://forum.yarbo.com/u/steve)\ **Post date:** [October 17, 2026, 12:23pm UTC](https://forum.yarbo.com/t/bug-in-perimeter-blowing-algorithm-misses-clearing-center-due-to-nozzle-offset-to-side/7815/14 "2026-10-17T12:23:32Z")
> [@bryan.wheeler](#): > > They could easily make an attachment that diffuses the exhaust out multiple directions Sounds like a printer project for someone! ---
**Author:** ![Yarbo-Forum](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.yarbo.com/yarbo-forum/32/126_2.png) [@Yarbo-Forum](https://forum.yarbo.com/u/Yarbo-Forum)\ **Post date:** [October 19, 2026, 3:55am UTC](https://forum.yarbo.com/t/bug-in-perimeter-blowing-algorithm-misses-clearing-center-due-to-nozzle-offset-to-side/7815/15 "2026-10-19T03:55:20Z")
Thanks for sharing your feedback! I’ll pass it along to our team for review.