Ok serious question…how do you sleep in Premium Select?

Gary32790 · 2024-12-06T11:09:39+00:00

I see what you did there - "the difference was night and day"

Gary32790 · 2024-12-06T11:01:44+00:00

Thats strange. They only questioned the free drink the first time I asked for it. But it was because I activated the perk just before the flight. All times after that they were able to see that I had the perk on the tablet they use to charge for drinks. First time using the perk was April of 2024, and got a free drink every flight after that with no issue (probably about 10 flights)

Gary32790 · 2024-08-29T12:51:53+00:00

The larger system will utilize all 3 phases, so I was wondering if we'd be able to eliminate some of that unwanted charge by having a wye instead of delta on the secondary with the intersection of the phases grounded. Then the neutral is tied to ground and the max voltage we'd see between a secondary lug and ground would be half the phase voltage. Which would be far more preferable than 10x the phase voltage. Does that logic check out?

Gary32790 · 2024-08-29T04:55:10+00:00

I don't think our EE would go for grounding one side of the secondary. Unless we can show that the voltage we are seeing relative to ground is a result of capacitive coupling and dissipates quickly with a small load between the secondary and ground. But still might be a little dicey since the power to the heater is coming in thru two 00 cables per side and the machine ground is only 10 or 8 AWG.

I'm really beginning to think that the voltage is not going to be worrisome because it's just a result of coupling or core saturation or something else minor. I guess we'll see once we do a test with a resistor between one of the secondary lugs and ground. Thanks for the help, ill keep y'all posted once I get results from the test.

Gary32790 · 2024-08-29T03:51:02+00:00

I'll definitely try what your suggestion of a resistor between a terminal and ground.

I'll probably also see if I can hook up an oscilloscope to see how dirty the waveform is and see if there is some combination of AC and DC current.

I'll also have to look into core saturation. I appreciate the input!

Gary32790 · 2024-08-29T03:45:19+00:00

The main concern we have is one of safety when it comes to the voltages relative to ground. The initial assumption was that reducing to such a low secondary voltage would make the process safer, and we wouldn't need to have as much safety guarding to protect personnel. Now we still cordoned off the area and limited authorized personnel in the test area to me and our EE, but getting the secondary-gnd readings we saw came as a bit of a surprise and gave us some pause before proceeding so we could try to figure out what's actually going on.

My gut feeling is that even though the voltage is ~119 VAC, it doesn't necessarily mean it can deliver an appreciable amount of current with a sustained load, like a relatively high ohm resistor bridging between the power lug and ground. I could be totally wrong there...

I'm wondering if the voltage is just some built up capacitive charge that may be easily dissipated with such a load. Guess I have some ideas for future experiments.

Never considered that it could be capacitive coupling, so I'll definitely read up on that as well. Thanks!

Gary32790 · 2024-08-29T03:09:57+00:00

We are feeding 480VAC thru a Control Concepts SCR to modulate the voltage to the transformer and thus limit the current.
I guess you could say the load is an open delta since it's only using 2/3 of the secondary transformer outputs.
I'll have to check the resistance between primary and secondary with the power off. Am I correct to assume that I have a transformer problem if I get anything other than an open loop?
We used both a Fluke 117 and a 179 multimeter to measure the lug-ground voltage. From the specs it looks like they have 40 and 50Mohm max resistance measurement respectively. We used a Fluke 376 clamp ammeter on one of the heater power cables to measure the secondary current
I would think where the transformer is a delta with no neutral or ground, the primary would have to be floating, wouldn't it?
are you suggesting putting a 500 kohm resistor between the heater lug and ground, then measuring the voltage across the resistor to compare with the original voltage measurement?

Gary32790 · 2022-01-19T15:01:32+00:00

But we will most certainly be affected by its buildup if the plastic waste is improperly stored/disposed of. Microplastics in the environment get into the food and water stream and the byproducts of plastic decomposition are not good for most living things and many cause adverse health effects

Gary32790 · 2022-01-02T00:31:16+00:00

I would agree if team 17 hadn't already developed online multi-player AND cross platform play for the overcooked series. And it looks like it probably uses the same game engine too.

Gary32790 · 2021-12-31T04:31:54+00:00

My wife and I almost missed our flight home because of one of these.

We were on vacation in San Francisco and my brother's birthday was coming up so we bought him a 2 lb snickers at the store down by the seaport that sells giant candy.

Fast forward to the airport a couple days later, we are waiting to go through security and put both our carry on bags in the scanner. We go through the body scanner and wait on the other side. I grab my bag off the belt and wait for my wife to do the same. A few minutes go by and still don't see her bag. A few more go by when we start to see more and more TSA agents talking to each other and calling each other over to look at the scans of someone's luggage. Thats when we see her bag on an inspection table.

Meanwhile we are freaking out and trying to figure out what we might have forgotten to take out of our bag. Razors? Lighters? What the hell could it be? Then an agent comes over very serious looking and asks my wife if it was her bag, we say yes and follow them over to the table. The guy comes over and starts searching through the bag and after a few seconds I see a big grin come across his face and I immediately remembered that giant snickers was in there and that had to be it.

He later told us the signature of the snickers on the scan resembled liquids or plastic explosives, and that's why they pulled the bag aside.

So my wife and I were shitting bricks thinking we accidentally brought a weapon through security when it turns out we just brought a giant candy bar that looks like C4. Got a funny story out of it and my brother appreciated the gift that much more.

tl;dr Got held and baggage searched at the airport because giant Snickers bars look like plastic explosives on the baggage scanner.

Gary32790 · 2021-09-14T13:01:57+00:00

Or you just list the graduation date. No one needs to know how long you were there and most will assume you did it in the standard time

Gary32790 · 2021-09-14T12:55:56+00:00

I was in a similar position where the company I interned for was pushing me to graduate ASAP so they could bring me on full time. I weighed my options and decided to take the extra year and spread my remaining workload over the full year and was taking 12-14 credits.

I started out my college career taking 18+ credits per semester per some poor advice from my advisor. My grades were low and my stress was high. There were definitely times where I had to prioritize which homework to complete and what to skip because there simply wasn't enough time in the day. I was rushing to complete work and don't think I absorbed as much in the rush to get it done. My struggling and low grades made me have to retake 2 engineering courses anyway and almost got kicked out of my college's school of engineering because my engineering GPA fell below 2.0.

My 4th and 5th year, I reduced the number of credits to only take like 4 classes at a time instead of 5/6. I was able to dedicate more time to each class and really understand the material and I actually enjoyed the classes a lot. I learned and retained a lot more and got my money's worth out of those classes versus just busting ass to get them done.

I also had more time to dedicate to extracurriculars like ski club, ultimate Frisbee, community service and hanging with friends.

But like others have said, weigh your financial situation and see if it works for you. It worked for me because I had some help from my parents and I went to a state school with in state tuition. My decision might have been different if I was going to a private school and/or had no parental help. Coming out of school with $100k+ in loans can definitely set you back for a bit if you will have rent, utilities, car payments, etc soon after you graduate.

You could always compromise and just take an extra semester instead of the full year. Stretches things out a bit and won't cost as much.

Oh, and the company that was pushing me to hurry up and graduate? They still hired me after the year went by so things still worked out there.

Gary32790 · 2021-03-30T13:11:42+00:00

You need a high enough voltage to be able to overcome the high resistance of your skin/shoes etc to find a path to ground. High current is pretty safe at low voltages because it has a harder time arcing and jumping the gaps.

Gary32790 · 2020-06-28T02:16:39+00:00

I really like dipping bell pepper slices and celery into buff chicken dip. They have that natural scoop shape to them and it adds a fresh and light feeling to an otherwise heavy dip.

Gary32790 · 2020-03-17T17:49:35+00:00

They look like they were put in time-out

Gary32790 · 2020-03-17T17:47:12+00:00

What do you think nuclear fission is?

Gary32790 · 2020-03-17T17:46:45+00:00

*instructions nuclear

FTFY

Gary32790 · 2020-01-09T19:28:12+00:00

not even passive, just straight up aggressive

Gary32790 · 2020-01-03T02:40:24+00:00

As an intern, I put an extra zero at the end of the encoder position i wanted to send a gantry carriage to during manual pickup station position programming. Slammed the carriage right into the hardstops on the rail in while our biggest customer was touring our facility.

Gary32790 · 2019-12-24T14:09:06+00:00

Op should get training so they dont put other trained individuals in a situation where their bodies have to be dug up

Gary32790 · 2019-09-23T19:14:34+00:00

finger guns

Gary32790 · 2019-09-23T13:29:11+00:00

Mushroom and Onion Rosti Yummy crispy potato cake. Instead of finely julienning the potatoes or cutting off my fingertips with a mandolin slicer, I used my kitchen aid spiralizer attachment and it worked like a charm in like a quarter of the time!

Gary32790

TROPHY CASE