u/Western_Employer_513

Ciao a tutti, il mio robot tagliarbe (mammotion Luba) mi sta creando un problema: dopo ogni passaggio le punte dell'erba sono bianche e sfrangiate, tipico segno di strappo e non di taglio netto. Le lame sono nuove di zecca, avranno fatto in tutto una decina d'ore. Faccio partire il robot sempre con l'erba asciutta e tolgo meno di 1/3 dello stelo per passaggio, quindi non mi spiego.

Qualcuno ha mai avuto questo problema? Mi chiedo se sia una questione di velocità del disco o magari un problema meccanico. Qualsiasi esperienza è benvenuta!

Got my Luba set up a few weeks ago and noticed the lawn looks rough after every session – tips are all white and frayed, classic sign of tearing rather than cutting. Checked the blades and they're basically new, maybe 8-10 hours total. Grass is dry when it runs, and I'm well within the 1/3 rule so it's not like I'm asking it to do too much at once.

Is this a disc speed issue? Like maybe the blade RPM is too low relative to ground speed? Or could it be a motor problem? Would love to hear if anyone else ran into this and what fixed it.

Hi everyone ,
Quick recap of my nightmare with a Luba 1 AWD (purchased in 2023).
About 10 days ago the robot stopped docking. Confirmed via phone camera that the IR beacon on the charging station is completely dead — zero output. RTK gets it to within ~1m but without IR it just spins in front of the base and gives up.

Opened a ticket on the app, sent photos, videos and logs. Spent days going back and forth with support, two escalations with zero response from their technicians. Eventually escalated via email and finally got somewhere.

The good news: they confirmed it’s a hardware failure, offered a replacement charging station for €176 (upgraded version, since the original is discontinued), and threw in 3 sets of blades as goodwill. Fair enough.

The bad news: estimated delivery is 8–16 business days. Which means it’s shipping from China. Which means potentially 3+ weeks before I can mow again.

So now I’m looking at bypassing the charging station PCB entirely — connecting the power supply output directly to the robot’s charging contacts to at least keep it charged while I wait. Anyone done this? Main concern is whether the PCB is just a passive passthrough + IR emitter, or whether it also handles some kind of handshake with the robot that would break charging if bypassed.

Would love to know:
• Has anyone opened a Luba 1 charging station and can describe what’s on the PCB?
• Any experience with direct bypass charging?
• Is there a way to manually dock and charge that I’m missing?
Grass is getting long. Patience is getting short.

Following up on my previous post about reverse-engineering modular sheet metal planters (link) where I got great advice on the general workflow.

I've been progressing in Fusion 360's sheet metal environment and ran into a specific problem I can't figure out: the corner relief gap.

When I add flanges to all four sides of a panel, Fusion automatically leaves a small gap at each corner — I understand this is correct and necessary for the bending process. But I'd ideally want those corners properly closed.

My question: what's the standard way to handle this with a fab shop?

• Do I just leave the flat pattern as-is and add a note like "weld and grind corners" in the technical drawing?
• Is there a cleaner joint design (45° miter cut before bending?) that makes the welder's job easier?
• Does powder coating after welding fully seal those joints or do they need to be fully ground flush first?

Designing in 1mm aluminim, corners don't need to be pretty on the inside, just structurally closed. Thanks!

https://preview.redd.it/rd8x5slq0ixg1.png?width=855&format=png&auto=webp&s=3682fb24ba4aca7d00b5788fa71d6f19d40e68b7

https://preview.redd.it/wkmvbbyq0ixg1.png?width=929&format=png&auto=webp&s=94ed9dddccd642fa9071540ab39b4123ba283485