General > General Technical Chat
Laser-ing the IC markings off on a budget.
Simon:
A bus manufacturer engineer told me that cars are designed for 3'000 hours use. I expect it's not as direct as that and there are other factors but that is 180'000 miles at 60mph so it sounds like a reasonable figure. It is not to say the car will literally stop at 3'000 hrs but under average use you can't expect the major items to still be usable and major repairs required.
A bus he claimed lasts 50'000 hrs which with a 16 hour day is 3125 days or probably 10-15 years which is not unreasonable. The thing with life expectancy is that you have to really work hard on some systems to have that sort of durability. stuff like vibration, fine for a few hours, but over thousands of hours a wire that is not properly restrained can chafe to the point of failure.
Cars still use brushed motors because any brushed motor will likely last 3'000 hours or even if it's 1'000 hours it takes the component through the guarantee. So why use brushless motors that will outlive the car and cost 50-100% more. It makes sense to put a brushless radiator fan on a bus that lasts 40'000 hours as it will likely last the 50'000 hours or more particularly if speed controlled. Apart from the speed controllable fan saving something like £8'000 in fuel (for the price of the controller for multiple fans) the fan will never need replacing as it will last 4 times the brushed fan for an extra 50% in price...... all worth it when you will use the 40'000 hrs of the fan and for less than £100 extra you save that cost 4 times over just for the labour to replace the brushed fans. But on a car why spend £75 on a fan when a £50 fan can do the job and you are fitting 1'000'000 of them?
coppercone2:
--- Quote from: Microdoser on March 24, 2021, 01:20:53 pm ---
--- Quote from: Simon on March 24, 2021, 12:41:56 pm ---The important thing is to design for longevity and change the attitudes about constantly buying a new one.
--- End quote ---
I'm currently designing a product, and I am designing it to be easily repairable. I want the end user to keep using my product and repair it, extending the time they use my product well beyond the standard product lifetime. Every time a user needs to buy a new product is a chance they won't choose yours.
Furthermore, I will offer a repair and refurbish service at a fair price and I hope this, as well as consumable parts, will become a steady income stream. Repairs will, at the preference of the end user, be simple board switching or component level repairs to minimize repair cost. It should always be cheaper and easier to repair the product than buy a new one IMO.
I am fully aware that any vested interests will reverse engineer any product. My defence against that will be to offer superior customer service and a trustworthy brand identity.
--- End quote ---
And how about getting a good reputation while you are at it? People will keep buying the newer versions for many different reasons with confidence
beanflying:
How about keeping somewhere NEAR on the OP's topic? :palm:
Simon:
--- Quote from: beanflying on March 24, 2021, 06:54:56 pm ---How about keeping somewhere NEAR on the OP's topic? :palm:
--- End quote ---
You mean the guy who called everyone who would not give him the answer he wanted a troll and has not come back for a page and a half.
beanflying:
--- Quote from: Simon on March 24, 2021, 07:29:55 pm ---
--- Quote from: beanflying on March 24, 2021, 06:54:56 pm ---How about keeping somewhere NEAR on the OP's topic? :palm:
--- End quote ---
You mean the guy who called everyone who would not give him the answer he wanted a troll and has not come back for a page and a half.
--- End quote ---
Maybe because you kicked him when a nudge would have done Simon ever thought about that? You have removed and locked threads for straying off topic and YOU are leading!
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