#garfield Logs

Aug 12 2023

03:45 AM Tom_L: yeah it splattered
03:56 AM Tom_L: i think that may be labelled as a diode
09:59 AM rue_mohr: if it splattered it was hard sudden short
10:00 AM rue_mohr: douch check the diode bridge too!
10:00 AM Tom_L: i think it could have been due to that resistor lead touching it
10:01 AM Tom_L: the lead had turned copper green as well
10:02 AM Tom_L: i'll find a fuse today
10:36 AM rue_mohr: truck repair day
10:37 AM rue_mohr: oh and aluminum casting
10:46 AM Tom_L: what are we fixin on the truck today?
10:46 AM rue_mohr: swap alternator and replace valve cover gasket maybe...
10:47 AM Tom_L: valve cover shouldn't be too tough
10:47 AM rue_mohr: nor is the alternator
10:47 AM Tom_L: on the tin ones i flatten near the holes so they don't poke into the new gasket
10:48 AM rue_mohr: then again, if I take the door off and fix the bushings I'll really enjoy the results
10:48 AM Tom_L: squeaky?
10:48 AM rue_mohr: completely worn out
10:49 AM Tom_L: find salvage ones?
10:49 AM rue_mohr: I dont think the holes in the steel are even round anymore
10:49 AM rue_mohr: I'll just make some up on the lathe
10:49 AM rue_mohr: redrill it round
10:50 AM rue_mohr: I want to do this lost PLA casting too
10:51 AM rue_mohr: need to print a sprew and riser
10:51 AM rue_mohr: I think
10:51 AM rue_mohr: cause I'm just going to straight burry it
11:52 AM Tom_L: fuse popped right away
11:53 AM rue_mohr: check the bridge recifier diodes for a hard short
11:53 AM Tom_L: gonna get another psu
11:53 AM rue_mohr: then check between the E/C or S/D of that big smartswitch transistor
11:54 AM rue_mohr: probably just got a power spike and fused some silicon
11:54 AM Tom_L: but i bet that R was the cause of it
11:54 AM rue_mohr: I think its a red herring
11:54 AM rue_mohr: everything I try to fix latley is littered with herring
11:55 AM rue_mohr: "How could that NOT have been the primary issue!?"
11:55 AM rue_mohr: we have automatic doors at work that aren't working after the install
11:55 AM rue_mohr: I found all sorts of mistakes, but their not the issue
12:06 PM Tom_L: still not working ehh?
12:23 PM Tom_L: i'll keep this PSU and maybe look to see what went wrong
12:56 PM rue_mohr: its a didfferent set of doors
12:56 PM rue_mohr: but they upgraded the old ones and now they have all sorts of issues too
12:57 PM rue_mohr: just do a ohm test on that diode pack, dont even pull it out
01:10 PM Tom_L: when i get ready i'll have you assist
01:10 PM Tom_L: i'd have parts but i dunno what i did with the first psu
01:17 PM rue_mohr: just check the diode bridge for 0 ohm shorts....
01:18 PM rue_mohr: there are only two things in the power path that can fail that hard, the diode bridge (easy swap) and the smart switcher transistor (give up)
01:20 PM Tom_L: doubt i have parts for it anyway
01:26 PM rue_shop2: oh cmon, its 1 minute with a meter
01:26 PM rue_shop2: and I think my get-up-and-go is an issue... :]
01:26 PM rue_shop2: right now, i'm going, but I'm headless, no focus at all
01:27 PM rue_shop2: cating, and engine
01:27 PM rue_shop2: er
01:27 PM rue_shop2: casting and truck
01:27 PM rue_shop2: going to try to focus on those
01:28 PM rue_shop2: I need some split hinges from the building store
01:41 PM rue_shop2: heh, I have to mow the casting area
01:41 PM rue_shop2: which means I need to fix the mower
01:49 PM Tom_L: ok i'm back and pulling the supply out again
01:54 PM Tom_L: so where's the diode pack?
01:55 PM Tom_L: no shorts found yet
02:08 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/psu/2390_psu3.jpg
02:13 PM rue_mohr: "DB1"
02:13 PM rue_mohr: 4 pins, should say + ~ ~ -
02:14 PM rue_mohr: just under the 2 big resistors
02:14 PM rue_mohr: also check Q1, the big one
02:14 PM rue_mohr: just lookign for 0 ohms
02:20 PM rue_shop2: I grabbed a machine to be the new jukebox, and it turns out its a quad processor 3.2Ghz i5
02:20 PM rue_shop2: not sure I can live with using it to just play mp3's
02:21 PM Tom_L: no shorts found yet
02:22 PM rue_shop2: if its not Q1 or DB1 its probably too much to dig for
02:22 PM rue_shop2: splatter is a hard short tho, so thats odd
02:22 PM rue_shop2: whats the resistance across the big cap?
02:22 PM Tom_L: are those mov?
02:22 PM Tom_L: or caps
02:23 PM Tom_L: i put it up for now
02:23 PM rue_shop2: the 200V 470, does that show a short?
02:23 PM Tom_L: had to make room for lunch
02:23 PM rue_shop2: mm
02:23 PM rue_shop2: waiting for the aluminum to melt
02:23 PM rue_shop2: hot enough day, and it doesn't want to
02:24 PM Tom_L: wonder if a rocket stove could be hot enough for that
02:27 PM rue_shop2: I'm just using a tiger torch
02:27 PM Tom_L: i know
02:28 PM Tom_L: just thinking
02:31 PM rue_shop2: I guess I dont have to go crazy filling the pot, its just a small casting
02:33 PM rue_shop2: I'll pour this too hot
02:33 PM rue_shop2: should help with the burnout and get good fill into the corners
02:34 PM Tom_L: you should calculate the volume convert that to a weight and weigh what you put into the pot
02:34 PM Tom_L: i'm not gonna mess with this PSU
02:35 PM Tom_L: i'll keep it around this time though
02:35 PM Tom_L: if i'd have saved the other one i could swap out the switch and be on my way
02:42 PM rue_shop2: no I dont think it worked
02:42 PM rue_shop2: too much plastic (as expected) it didn't come back up the riser
02:43 PM rue_shop2: only those 2 parts should be the cause of a hard short
02:43 PM rue_shop2: most often the main transisotr shorted
02:43 PM rue_shop2: SOMETIMES the diode bridge
02:44 PM rue_shop2: but that one uses a normal transistor it seems, not one of the 4 pin smart things
02:52 PM rue_shop3: ah, maybe if I use this workstation as the new jukebox
02:52 PM rue_shop3: its a bit slow for a worksttion
02:52 PM rue_shop3: 2 core 3Ghz,
02:52 PM rue_shop3: ...
02:52 PM rue_shop3: intel sucks
02:53 PM rue_shop3: those speeds on even a single core AMD would be way more than enough
02:56 PM rue_mohr: I dont think it worked, the aluminum did not come back up the riser (so I poured more in there too) but it looks like, even with a minimal plastic print, there was too much plastic to real-time burn out.
02:56 PM rue_mohr: uh
02:56 PM rue_mohr: the sprew and riser that were 3d printed came out nice
02:56 PM rue_mohr: huh
02:56 PM rue_mohr: insulting
02:57 PM Tom_L: just goes with the rest of the week it seems
03:00 PM rue_mohr: I'll dig it all out later when it cools more
03:00 PM rue_mohr: I kinda suspect the stupid peice I wanted to cast is still in there all still plastic
03:28 PM rue_shop2: oh, those hybrid battiers are NiMh
08:12 PM rue_shop2: ok I moved all the soil to the back
08:12 PM rue_shop2: and the jukebox crashed again
08:12 PM rue_shop2: ok, I'll use the i5
08:12 PM rue_shop2: after all its an intel, it probably needs 4 cores and 3.2Ghz to play mp3s
08:29 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1290151.jpg
08:29 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1290152.jpg
08:29 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1290153.jpg
08:29 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1290154.jpg
08:29 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1290155.jpg
08:29 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1290156.jpg
08:29 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1290157.jpg
08:29 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1290162.jpg
08:31 PM Tom_L: woops
08:31 PM Tom_L: wonder why it didn't flow
08:34 PM Tom_L: did you pour in both holes?
09:20 PM rue_mohr: there was too much plastic burning out
09:20 PM rue_mohr: after it didn't come up the riser, I poured metal in there too
09:21 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1290164.jpg
09:21 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1290165.jpg
09:21 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1290166.jpg
09:21 PM rue_mohr: a buddy is digging himself a basement, so I got some dirt
09:22 PM rue_mohr: and I finally remembered to trim back a ? thats been making a mess of itself for years now
10:49 PM rue_shop3: steam engine, definitly not on the todo list
10:52 PM Tom_L: scratched that one off ehh?
10:56 PM rue_shop3: :/
11:02 PM rue_shop3: this is interesting
11:02 PM rue_shop3: I thought I could use the new cnc to do this project, but its too small again
11:02 PM rue_shop3: I need to get that big one going
11:04 PM rue_shop3: ooh
11:04 PM rue_shop3: maybe I can make it in 2 parts from the start
11:04 PM rue_shop3: its a bearing pillow block
11:04 PM rue_shop3: the idea was to make it in one peice, then split it
11:05 PM rue_shop3: but, if I make it split from the start, I can fit it
11:06 PM rue_shop3: if I do this, it might be the only v2 steam engine that exists
11:10 PM rue_shop3: z=15mm
11:20 PM rue_shop3: so the 3d printing makes a rough template, then its cast, then the cnc cleans it...
11:20 PM rue_shop3: everyone is working together :]
11:28 PM Tom_L: casting is being an evil child though
11:37 PM rue_shop2: I think I can do this tho
11:37 PM rue_shop2: this one isn't hard
11:37 PM rue_shop2: ^ famous last
11:38 PM rue_shop2: I hauled all that dirt to the back of the yard with the electric cart I made, its... charging more than usuall...