#garfield Logs

May 08 2018

12:03 AM rue_mohr: it would be good, if I had a saw I could do it with
12:07 AM rue_mohr: I think the weld-fillability will be pretty good, so half of me is saying to just do it
12:07 AM rue_mohr: katsmeow, the other thing I'm not sure on is how the sizes of any two pipes will match, as the bending process shrunk them
12:07 AM katsmeow: are you running the pipe thru the rollers in both directions?
12:07 AM rue_mohr: no, I walk it to the other end and run it thru again
12:07 AM katsmeow: make a plaster cast, compare
12:07 AM rue_mohr: the motor cant start under load
12:07 AM katsmeow: but you didn;t flip the pipe end-for-end for the 2nd pass?
12:07 AM katsmeow: hmm, still should not be too different some distance from the ends
12:07 AM rue_mohr: no, but I was thinking maybe I should have to cancel out any dog-legging
12:07 AM rue_mohr: arg, if I had 4 arms right now, I could be typing and shaving
12:33 AM * rue_mohr writes generic state machine code
08:12 PM rue_shop4: zhanx, if you finish post-work collapse, give me a shout
08:12 PM zhanx: k eating now
08:41 PM zhanx: ok rue_shop4
08:41 PM zhanx: chilling on the couch with the laptop
09:01 PM zhanx: rue must still be post work collapsed
09:04 PM rue_shop4: trying to stay awake and makeing supper
09:15 PM Tom_L: eating will surely put you down
09:23 PM zhanx: yep
09:24 PM rue_mohr: hopefully it takes 2 hours
09:24 PM rue_mohr: you have a semi-operation prompt, now is good timing
09:27 PM zhanx: ok
09:27 PM zhanx: what did i need to give you a shout for?
09:33 PM rue_mohr: 3d printer
09:35 PM zhanx: k
09:35 PM zhanx: i got home at 2030 its not getting touched tonight
09:36 PM rue_mohr: question queue
09:36 PM zhanx: ok
09:37 PM zhanx: go
09:37 PM rue_mohr: inverse dir
09:37 PM zhanx: which axis?
09:37 PM zhanx: its set in the code
09:37 PM rue_mohr: do you have anything in your question queue
09:38 PM zhanx: not right now
09:38 PM rue_mohr: ok
09:38 PM zhanx: brain is fried
09:38 PM zhanx: i should upload a pic of the wiring messing for the phone system today
09:39 PM zhanx: 200 drops and zero cable management
09:39 PM rue_mohr: what termination blocks do they use over there?
09:39 PM rue_mohr: 66? 110? box?
09:39 PM zhanx: 110
09:39 PM rue_mohr: k
09:40 PM Tom_L: organized chaos
09:40 PM zhanx: if it was that easy
09:40 PM zhanx: I should have said VOIP phones
09:40 PM rue_mohr: slow growth is a killer
09:41 PM zhanx: yes it is
09:41 PM rue_mohr: vlans? cisco? nortel?
09:41 PM zhanx: the log for the room had people in routinely every 6 months
09:41 PM zhanx: Vayana
09:41 PM rue_mohr: Avaya?
09:41 PM zhanx: Cisco sysle
09:41 PM zhanx: that is it
09:41 PM rue_mohr: bought most of notrel
09:42 PM zhanx: as of now all the phones work, wiring is "better" and its not a huge mess
09:42 PM rue_mohr: is ride a rocket the ONLY song lithium and sonya did?
09:43 PM zhanx: never heard of them
09:43 PM rue_mohr: lots of the jobs I was at I'd do a llittle cleanup each service call
09:43 PM rue_mohr: round off the half hour
09:43 PM zhanx: i had to clean to find the wires i needed
09:43 PM rue_mohr: pull out chunks of cut off 50x cables
09:43 PM zhanx: thats the worse right there
09:44 PM zhanx: the last contractor added 100 drops
09:44 PM zhanx: no ends
09:44 PM rue_mohr: bottom rate?
09:44 PM rue_mohr: ouch
09:44 PM zhanx: with lots of extra cable in the cabinet
09:44 PM Tom_L: i was in the attic of a city building with my bud that was wiring fiber and there was piles and piles of 3com wire laying on the drop celings
09:44 PM rue_mohr: out of a company of like 22 we have like 3 guys who can do termination
09:45 PM zhanx: what?
09:45 PM zhanx: Tom_L: yea drop ceilings are like the black hole of waste
09:45 PM rue_mohr: Tom_L, the serial or thicknet stuff?
09:45 PM Tom_L: thick crap
09:46 PM Tom_L: funny enough i think some of it was still in use
09:47 PM Tom_L: it was the first network stuff right after tin can n string
09:47 PM zhanx: the look on the officer managers face told me i was in for a day when i asked to see the equipment room and she was like oh dear you want to go in there?
09:48 PM zhanx: after their expansion is done i get to go back
09:51 PM katsmeow: new neighbor has been burning the guts torn outa the trailer, i have not been able to go outside all day, ad the whole upstairs smellsof trash smoke
09:51 PM rue_mohr: that big pile eh?
09:52 PM katsmeow: it's twice what it was when i took thatpic
09:53 PM katsmeow: they have two smouldering piles, a a few piles not lit yet
09:54 PM katsmeow: and it hasn;t rained in a week, so the woods are dry, and the wind is blowing towards me
09:55 PM zhanx: heck our burn ban is on for another week up here
09:57 PM rue_mohr: your not insured, you would have to sue them
09:57 PM katsmeow: rue, in courts here, i could not even prove they had a fire
09:58 PM rue_mohr: you would need zhanx to come in and tell them
09:59 PM katsmeow: judge once said i cold not prove the smoke i complained about came from the fire they had on their land
09:59 PM rue_mohr: I'm not aggressive enough as a canadian
09:59 PM katsmeow: and i am not worth anything, so no win
09:59 PM rue_mohr: do you know how to test if someone is a canadian?
10:00 PM zhanx: yep walk into them
10:00 PM rue_mohr: I was gonna say, step on their foot, but yea
10:00 PM rue_mohr: kat, they will appologize
10:00 PM katsmeow: i heard it before, but wasn;t goingtotest you if we ever met irl
10:01 PM zhanx: vs me, if some walks into or steps on my foot, i react very opposite of that
10:02 PM rue_mohr: apparently its a canadian thing
10:03 PM zhanx: not just canada
10:03 PM rue_mohr: :/ my state machine is not attaching to my even driven code
10:03 PM rue_mohr: due to the required intermediate flag layer
10:04 PM zhanx: you know i am happier working back in tech
10:04 PM rue_mohr: ok
10:04 PM katsmeow: <two mil guys talking about mil stuff in a civilian forum that's not about mil stuff> DCGS-A system well. I was in Iraq 09-10 and we used that extensively.
10:04 PM katsmeow: <me> One of you then might want to fix the https protocol at rdl.train.army.mil. Use of a self-signed certificate doesn’t prove authenticity.
10:04 PM zhanx: least know i can walk on a job blind and be ok this is easy
10:05 PM zhanx: kat thats be broken forever
10:05 PM zhanx: been
10:05 PM zhanx: and they dont care
10:05 PM rue_mohr: few times iv' left for a job worried about needing soemthing, and realized I just need my brain
10:05 PM * katsmeow nods
10:06 PM zhanx: well the basic tool kit i got covers just about everything
10:07 PM rue_mohr: arg, I cant get my head into this code
10:07 PM rue_mohr: or vise versa...
10:07 PM rue_mohr: hmm
10:07 PM zhanx: step back and glare at it
10:08 PM katsmeow: he canot be aggressive enough
10:12 PM rue_mohr: damn, I dont have a passport
10:12 PM rue_mohr: I wonder if I can get one in time for my second week of vaccation
10:13 PM rue_mohr: tho, I'm not sure I can make it to visit any of you and get back in a week
10:13 PM zhanx: where you going?
10:13 PM rue_mohr: apparently nowhere
10:13 PM zhanx: not without a passport
10:13 PM rue_mohr: there were thoughts of going to shezeng china
10:13 PM rue_mohr: shenzeng?
10:13 PM zhanx: great place to vist
10:13 PM rue_mohr: electronic markets
10:14 PM zhanx: electronic market city
10:14 PM katsmeow: <drool>
10:14 PM rue_mohr: yEA!
10:15 PM rue_mohr: imagine more than one store in a row wall to floor of electronic components
10:15 PM zhanx: like blocks of them
10:16 PM katsmeow: for only a few pesos
10:17 PM rue_mohr: and china is so small, you can walk amazing distances
10:18 PM zhanx: lol
10:18 PM katsmeow: and everyone looks upto you
10:18 PM rue_mohr: hehe
10:18 PM zhanx: that is normal for me
10:19 PM zhanx: most of the world looks up to me, its nice
10:22 PM rue_mohr: oh its your, hah
10:22 PM rue_mohr: pff, I should show you the main hospital room
10:24 PM rue_mohr: kat, thats funny, but I suppose $1800 for a dog itsnt really that expensive, esp if you consider a few vet visits
10:24 PM katsmeow: and all the various other issues
10:25 PM katsmeow: for tiny apts in KJapan, when you can turnoff the bark, and it has rubber feets, is idea
10:25 PM katsmeow: l
10:25 PM katsmeow: and possibly with the right app, it can talk and be your Siri
10:25 PM rue_mohr: oooooh
10:25 PM rue_mohr: I'm supposed to have this code and stuff working for tommorow,
10:25 PM rue_mohr: damnit
10:26 PM rue_mohr: so far, I'v looked at it
10:26 PM katsmeow: i wonder if the dog knows to keep it;s batteries cool while recharging them
10:27 PM katsmeow: rue, have you ever seen the Roseane tv show?
10:28 PM katsmeow: from 20 yrs ago, or now?
10:28 PM rue_mohr: yup
10:28 PM katsmeow: it fits right in with prez Trump, doesn;t it?
10:28 PM rue_mohr: I dont remmeber much about it
10:29 PM katsmeow: crasy dictator always going off on something, toomuch yelling
10:30 PM rue_mohr: you mean like I love lucy?
10:30 PM rue_mohr: (I didn't just go back too far did I?)
10:30 PM katsmeow: no, Lucy was more crying, less yelling
10:31 PM rue_mohr: I thought her husband was a bit of a loudmouth
10:31 PM katsmeow: telling tho that the early shows, Ricky would spank Lucy
10:32 PM katsmeow: at least on The Honeymooners, Geason didn;t actually hit anyone
10:35 PM rue_mohr: hmm
10:37 PM zhanx: good thing i dont have cable, cause i can just ignore the shows i don't want to watch
10:38 PM katsmeow: i do not have cable too
10:38 PM katsmeow: new neighbors haditinstaleld today
10:38 PM katsmeow: guy with truck was up the pole when i went to get snailmail
11:03 PM rue_mohr: https://github.com/achiestdragon/leggie/blob/master/schematics/h_bridge.pdf
11:03 PM rue_mohr: katsmeow, this is a test
11:03 PM rue_mohr: the resistors are all 1/4w
11:04 PM katsmeow: huh?
11:06 PM rue_mohr: see if you can find any design errors
11:08 PM katsmeow: the fets cannot be turned full on, because you cannot pull anygate above or below the pwr busses?
11:10 PM katsmeow: if you drive the h-bridge too fast, the charge current to the gats may pop the totempole drivers?
11:11 PM rue_mohr: I'm listening to see if you come up with all the same things I did
11:13 PM katsmeow: alreasdy closed the pdf,, oh yea: it;s a pdf
11:15 PM rue_mohr: I got a few toher things
11:15 PM rue_mohr: are you into starring at it a while more?
11:15 PM katsmeow: why did you post it on a google website, when you have your own site?
11:15 PM katsmeow: no
11:15 PM katsmeow: if you fixed what i mentioned, chances are allthe other things willbe changed too
11:16 PM katsmeow: i didn;t look at any of the 555 cirsuits
11:20 PM rue_mohr: its not my schematic
11:21 PM katsmeow: k, thenlemme iint out if you add a few mor transiators, and chnage the gate drivers to darlington bipolars, yo can eliminate the fets
11:21 PM katsmeow: my paws are sore
11:22 PM katsmeow: hurt a lot to even put onmy shoes today
11:22 PM rue_mohr: I'd just like for you to see if you found the problems I did with it
11:22 PM rue_mohr: but ok
11:23 PM katsmeow: it's prolly not an issue, but you canot adjust the deadtime on the drivers
11:23 PM katsmeow: but it's prolly adequate anyhow
11:23 PM rue_mohr: I dont think so
11:23 PM rue_mohr: if he's got a lot of switching I think things are gonna heat up fast
11:24 PM rue_mohr: there are no flyback diodes either...
11:24 PM katsmeow: because the fets canot saturate?
11:24 PM rue_mohr: what I see is 20V gates driven with 36V
11:24 PM rue_mohr: he does have the N channel on the bottom
11:25 PM katsmeow: yea,, it did seemlike increasing the psu voltae was an afterthought
11:25 PM rue_mohr: I'd use a design a bit like that for 12V
11:25 PM rue_mohr: tho I'd prolly use a 556 to drive the fets
11:26 PM katsmeow: fets to me are apita, because they need so many fixed volatges, they are't current devices like bipolar bases
11:26 PM rue_mohr: dtc and level shifting all in the same oomf
11:26 PM rue_mohr: indeed
11:26 PM rue_mohr: but if your driving low voltages the low impedence is nice
11:27 PM katsmeow: there's bipolars that will pull 0.3v BE
11:27 PM rue_mohr: no, I mean CE
11:27 PM katsmeow: me too, distracted, brb
11:27 PM rue_mohr: sometimes 0.5-2.0V CE * current = yikes
11:30 PM rue_mohr: the irf640 isn't a performance whiz either
11:34 PM rue_mohr: 20A motors
11:34 PM rue_mohr: the irf640 is a 0.18Rdson fet
11:37 PM katsmeow: bak
11:38 PM katsmeow: 20amp motors? serious issues then
11:38 PM rue_mohr: yea
11:38 PM rue_mohr: bipolars, even bad ones, would be MUCH better than those fets
11:39 PM rue_mohr: oh no, someone I know is gonna die
11:39 PM rue_mohr: 8-| damnit.....
11:39 PM katsmeow: well, hard to find bipolars built to take 20amp at 35v across them
11:39 PM rue_mohr: 2n3055
11:39 PM rue_mohr: ?
11:40 PM katsmeow: no
11:40 PM rue_mohr: oh, their 15A
11:40 PM katsmeow: i ran some 100v motors with MJ11015 and MJ11016
11:40 PM rue_mohr: two parallel 3055
11:40 PM rue_mohr: :) fixed!
11:41 PM rue_mohr: you just need to drive their bases with a 3055
11:41 PM katsmeow: gain if 10, i'd use some darlingtons, else you need another psu to generate a volt of base drive at 2amp per transtsor
11:41 PM katsmeow: er, 1 amp
11:42 PM rue_mohr: I was actually thinking of using some of those HOT transistors as a current sensor
11:43 PM katsmeow: frankly, after mounting transistors on heatsinks for 50 yrs, i'd rather use TO-220 or TO-256
11:43 PM rue_mohr: run the load BE and use the collector as the sense line to a suitable resistor
11:43 PM katsmeow: or TO-3P
11:43 PM rue_mohr: I was surprised to see that the heat transfer data of the 220 is better than the to-3
11:43 PM rue_mohr: by a few times
11:43 PM katsmeow: TO-247
11:44 PM rue_mohr: never heard of it
11:44 PM rue_mohr: is it the to-3 compatible large-ish 220?
11:44 PM katsmeow: not only that, but since you need more to-220 than to-3, you are inherently spreadingthe heat farther along the heatsink, and can use a slightly cheaper sink
11:44 PM rue_mohr: k
11:45 PM katsmeow: no, there's a lot of TO-3 over 150 watts , the TO-220 tops at 60w and most are 45w
11:45 PM katsmeow: it's just in mounting TO-3, so much heatsink gets drilled away right where you NEED the aluminum, it's a waste
11:46 PM rue_mohr: 'please mount the transistors in a polygon around the pad they feed'?
11:46 PM katsmeow: TO-247 / 126 / etc are like 60 watts easily
11:46 PM rue_mohr: the 640 is 50W
11:47 PM rue_mohr: oh I closed it
11:49 PM katsmeow: for a 40v psu, i looked at most transistors i have worked with, and have in stock even, and for SOA that includes 1amp at 40v across it, the lil TIP102/107 beat them all for dissipation, ease to drive, and ease of mounting whereever i wanted to
11:50 PM katsmeow: the MJ21193 - MJ21194 250v 250w pnp-npn has a huge soa
11:51 PM rue_mohr: please don't die...
11:51 PM rue_mohr: I don't know how this works,
11:51 PM rue_mohr: but it always seems to happen
11:51 PM katsmeow: who are you talking to?
11:51 PM rue_mohr: I better try to call by buddy who's been having the strokes latley
11:52 PM rue_mohr: I have a song really stuck in my head
11:52 PM rue_mohr: like REALLY
11:52 PM katsmeow: the MJ15022 , MJ15023 , MJ15024 , MJ15025 has large SOA too
11:52 PM rue_mohr: this is always accompanied by the death of someone I know
11:52 PM katsmeow: ok, good lucks