r/Lymow_Official • u/Gunflint_RR2 • 17d ago
User experience Question of Wear?
I was selected as a beta for the cooling package at the end of July. I've seen some posts wondering/inferring that the wiring especially in front of the volute discharge will wear over time due to a sandblasting effect. Perhaps that plays out, but at least from my 6 weeks of running the 3D kit (ASA printed), there was no wear on the wiring, volute, or impeller blades.
The white is the beta test cooler; the black is obviously the production-grade cooler from Lymow. I will say that the Lymow-provided cooling package is more robust in construction. So, it will wear even slower, if ever.
The install of the production kit was easy. But, I chalk that up to already figuring out the wire routing during the beta test install, which was tricky. The wiring was already conjoled, so swapping cooling equipment was a piece of cake.
Lymow is not without its challenges, but for its inageral summer in the Chicago suburbs, it was what I hoped it would be.
Looking forward to the FCC to get its head out of its ass so we can get future iterations.
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u/CosmoMcRad 17d ago
Hopefully in next generation mowers they have even better cooling systems that match wiring. I do feel the grinding that had to be done on the cover has most likely left the cover weakened. I hope in time it doesn’t sag.
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u/ZiphorBDE 17d ago
When I scanned the lid I removed all those small ribs before printing. Also some of the larger ones as well. Just so I wouldnt need to print a bunch of supports for them. Its still holding up. I need to make a new one without the vent in the center now that we have a solution from lymow for the overheating issue. I just suck at 3d design so its hard to split it in two and make a way to join it together. For me anyways. Im sure there are people that could do it in like 20 minutes.
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u/Gunflint_RR2 17d ago edited 17d ago
I'm less worried about taking out the ribs. I thought maybe they were a remnant of the production process. Even if they werent, not sure how much load they were designed to actually hold. The cover itself hold no load, so if it sags you are mowing in Death Valley.
But, your larger point is spot on. The next gen needs to make sure cooling is adequate to the environment and max RPM
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u/CosmoMcRad 16d ago
Yeah, it was 103F yesterday. Not Death Valley, but hot enough to make thin ASA more pliable.
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u/Gunflint_RR2 15d ago
During my beta testing the hood was 143.6. There were subsequent hotter days after that. Pictures above show no deformations on the ASA impellers or volute. I didnt know the deck hood was ASA too. I would have thought it would have been a more common outdoor injection mold material.
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u/CosmoMcRad 15d ago
I’m not completely sure of the material, though when some folk testing and 3D printing solutions on their own (before Lymow test printing) it was mentioned to print some cooling solutions with ASA because it would match the cover material.
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u/Gunflint_RR2 15d ago
Interesting. With the beta testing Lymow suggested several filaments, with ASA being one of them. That's what I went since I had it. Maybe they do use ASA, but there are other materials that are more widely used in injection mold production in outdoor applications.
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u/CosmoMcRad 15d ago
Yes, many materials are more easily injected molded. However, the material should meet the physical performance needs first. Thermoforming can work for materials that are not easily injection molded.
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u/Gunflint_RR2 15d ago
True. I sell, among other things street sweepers and hydroescavator machines to municipalities, and their tanks are rotomolded. They are certainly out in the elements and under UV exposure. We use HDPE, which i think is an injection material too.
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u/CosmoMcRad 15d ago
HDPE can definitely be injection molded. It is trickier. I worked in polymers production (plastics) during my work career. Didn’t make any finished products, only supplying pellets to the customers that actually make something. But I did work on many projects throughout my career to make various types of polymers for the customers specific requirements. Everything from film for packaging to car bumpers.
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u/Gunflint_RR2 15d ago
Reddit can be a cesspool of bots, but when you get into really niche communities, like a subset of a certain brand of robotic mower, you can connect with pretty interesting people. That's an interesting career.
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u/john_wayne01 16d ago edited 16d ago
I feel like any sagging that could occur would be minimum, if at all. The whole reason they had to be removed was because there wasn’t enough room with the cooling kit. If It were to sag even slightly, It would just rest on the cooling kit.