The issue with the DC heated beds seems slow temperature rise. Some bigger builds and beds need a quicker heatbed heater. (In my opinion not needed for PLA) Only for ABS.
The Chinese aren’t any more corrupt or corner cutting than any other manufacturing country ….. Since they are 3 1/2 times larger than the US then I’d expect to see 3 1/2 times more corruption and corner cutting …. It’s like CO2 output, yes China puts out more as a nation but per person the US puts out over 3 times more CO2 plus we had a 100 year head start which is why we are more responsible for the Global Warming problem (along with Europe) than China is by a considerable margin …..
The only thing I would add would be a (redundant) circuit breaker (Airpax, Heinemann, et al) on each input that was two-pole with a common trip bar. That, and I would build it in a metal enclosure.
https://www.ul.com/newsroom/publicnotices/ul-warns-of-solid-state-relay-with-counterfeit-ul-recognition-mark-release-13pn-52/
While we didn’t encounter any exposure accuracy issues in our lab tests, I had a little trouble with the Sony A33 and A55′s exposure system in the field. Under bright sunlight, I was generally shooting with -0.3 EV of exposure compensation dialed in. Looking at my photos on the computer later, it seemed that many of them really could have used -0.7 EV. The overexposure bias seemed fairly universal under bright lighting, regardless of whether the subject itself was low- or high-key. Shots under lower lighting didn’t seem to have the same issue, though.
Also, worth noting is that many cheap supplies out of China are designed for 110V/220V, +/- 10%. Consequently they’re designed to 121V/242V. For those of us in 240V areas, so in perfect conditions, they’re operating at the very top end of their specifications.
One quirk of the design of the Sony A33 (and shared by the A55) unfortunately conspires to make this high-speed burst shooting somewhat harder to use than would otherwise be the case. For both the ultra-speedy Continuous Priority AE mode, and the six frames per second Continuous Advance Hi mode, the live view isn’t shown on the viewfinder or LCD panel. Instead, the A33 shows the previously captured image. This makes it harder to follow fast-moving action, since rather than seeing what’s you’re trying to frame, you’re effectively seeing a static slideshow of what happened around a tenth of a second earlier. This problem, incidentally, is also found on all of the SLD’s we’ve reviewed. The Continuous Advance Lo mode, which shoots at around 2.5 frames per second on the A33, does return to the live view between shots, but only briefly — so it can still be a little hard to follow.
Level 2 charging systems come in two basic varieties, plug-in portable and wall-mounted units that are hard-wired directly to a home’s electric service. If you don’t have a closed garage and you’ll be charging the vehicle outside, local codes may require a fixed-mount unit. Otherwise a portable charger requires no professional installation, assuming you’ve added the 240-volt service line. This type can come in handy if you own two homes or will be staying with friends or family in another town and want to take the unit along for charging at your destination.
Norm, remember your high school electrical classes, and don’t confuse the young ‘uns here. I’m sure you’ll recall that halving the current reduces losses (heating) in a conductor to one quarter: losses are proportional to the square of the current.
Installing a ceiling fan might not sound complicated, but it’s nothing like putting together a barbecue yourself. You’re trying to figure out the motor while hoisting a 70-pound fan 12 feet above the floor. Call me up—I can finish the job faster and safer than you could.
It can take 15 to 20 minutes for your air conditioner to get up and running after it’s tripped a circuit breaker or the power is turned off. Be patient and wait it out before trying something else.
It is not uncommon to see lower than specified rating triacs on these cheap Fotek SSRs. Look up on youtube, it is probably a fake one.
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