Mammotion Luba 2 AWD 2024 - Front Bumper Fins - Remix

Introduction

I used Zerdino's bumper design on my Luba 2 AWD 2024 to be able to mow closer to my lawn-edge-stones at the rim of my lawn. The original bumper will not hit them as they are too low. So I used his model and it worked fine. 

However: 
I experienced a couple of minor problems that, after a good month of mowing, bothered me so much, that I now did a remix of it.

Note

• Looking at the pictures: Black one is the original design, white one is this remix.
   

• You won't need this remix if you use side deflectors on your Luba. 
  They will solve the issue even better.
   

• It should fit Luba 1 and 2025 Luba X models, too
   

Issues and solution

• I experienced the fins being a little bit too close to the ground, hence touching it while driving down small slopes.  
  Although my lawn is relatively even, I still have some dents and humps in it and while not looking that bad for the eyes it lead to the fins touching the ground / soil and triggering the bumper
  
  Solution: 
  I shortened the originally 25mm long downward fins to 12,5mm. 
  Still quite an improvement to the original bumper, so it is still hitting my edge-stones, as intended.
   

• This is a little bit hard to explain:
  The new bumpers have a very sharp vertical edge on the side and it also overhangs the original bumper sideways quite a bit. 
  I realized, that especially on perimeter rounds or manouvering around no-go-zones, the Luba sometimes drives back and forth in small increments. 
  
  Going forward, the 45 degree angle at the front of the bumper deflects smaller objects, like small branches to the side, or it pushes the Luba itself inwards. 
  But while driving backwards, like when doing smaller backwards manouver corrections, the overhanging part of the bumper can catch on objects. These then hit the flat backside of that edge.
  
  I especially had this issue at no-go-zones around trees or smaller bushes. 
  When it catched, the bumper won't trigger as it pushes in the wrong direction. Luba keeps driving away from it and keeps hanging. This didn't seem healthy to me on the long run because it puts unneccessary stress on the bumpers's connection.
  
  Solution:
  I added a small 45° deflector part to the back of the bumpers at these edges. When driving in reverse into an obstacle the chances are good that these are deflected / pushed out of the way. 

Print Settings

• Print laying on the front side

• No supports needed.

• I used PETG

• 0,2mm layer height

• 3 walls, 4 top/bottom

• 15% gyroid infill 
  (you can set it to 5 walls to make the fins solid)