#garfield Logs
Apr 03 2018
#garfield Calendar
12:07 AM katsmeow: the original LED : tryingto push 5amps thru a 5U4
12:10 AM katsmeow: afk to get snailmail
12:13 AM rue_mohr: srry, trying to get the bettter of a oled dislay thats kicking my ass
12:26 AM katsmeow: bak
12:32 AM katsmeow: https://www.ebay.com/itm/16Pcs-Square-Mirror-Tile-Wall-Stickers-Self-Adhesive-3D-Decal-Mosaic-Home-Decor/273036725273 <<== 6x6 inch mirror panels from ebay, are .006 inches thick, and not capable of self support
12:33 AM katsmeow: they come from several sellers, that's a chinese guy in usa selling them in usa
12:33 AM katsmeow: i thought they were 1/16 plastic
12:35 AM rue_mohr: ok, what are they?
12:35 AM rue_mohr: oh, srry reread
12:35 AM katsmeow: .006 thick aluminumised mylar ?
12:36 AM rue_mohr: ok, this screen defeated me for a 3rd day in a row, off to bed
12:36 AM * katsmeow ponders the time machine settings in metric, where one step is a week, the nest step is almost 2 years!
12:43 AM katsmeow: a file with adjustable teeth angle
12:52 AM katsmeow: wow at the tools this guy pulls outa his a.....cumulation
01:21 AM katsmeow: ok, gnite
01:21 AM katsmeow: gnite clog
11:02 AM katsmeow: mou
07:30 PM zhanx: rue_mohr: what extruder is that so i can either make it or order it
07:31 PM zhanx: finally finished the slide show
08:15 PM rue_mohr: heh
08:15 PM rue_mohr: china
08:15 PM rue_mohr: I get a kit
08:15 PM rue_mohr: dont bother with a bowden, just get a direct one
08:15 PM rue_mohr: see what I have...
08:16 PM zhanx: looks like a j
08:16 PM rue_mohr: technically I suppse
08:16 PM zhanx: k ordering from china
08:16 PM rue_mohr: let me shoot you a link
08:17 PM zhanx: what your kit?
08:17 PM zhanx: k
08:18 PM rue_mohr: https://www.aliexpress.com/item/FreeShipping-Long-distance-3D-Printer-J-head-Hotend-for-1-75mm-3-0mm-E3D-Bowden-Extruder/2041826923.html
08:18 PM rue_mohr: "short" means not bowden
08:18 PM zhanx: k
08:18 PM rue_mohr: and their out... huh
08:19 PM rue_mohr: there is a really thin piece of stainless in there as a thermal break
08:19 PM zhanx: k
08:19 PM rue_mohr: you will break it...
08:19 PM rue_mohr: so, try not to
08:19 PM rue_mohr: ?
08:19 PM zhanx: I guess i ebay it for now
08:19 PM rue_mohr: ok, thats the one I got
08:20 PM rue_mohr: key points, NOT bowden, has heater, 0.4mm head is fine
08:20 PM rue_mohr: and has sensor
08:20 PM zhanx: added to my list for the next printer that will be much cheaper
08:20 PM rue_mohr: shoudl be about the same price on ebay
08:20 PM zhanx: 3 dollars more
08:21 PM zhanx: but way less shipping time
08:21 PM rue_mohr: ebay just dosn't give you the pruchase protection
08:21 PM rue_mohr: heh, na, same shipping time, just more optomistic
08:21 PM zhanx: no, its shipped state side
08:21 PM zhanx: us seller
08:22 PM rue_mohr: I had free shipping from amazon arrive next day, the min they say is 3
08:22 PM rue_mohr: ah
08:22 PM rue_mohr: that expalins the $3
08:24 PM zhanx: i got my limit switches (lots and lots of them)
08:24 PM rue_mohr: ... yo only need 3
08:24 PM zhanx: mechanical and optical, just got 5 more optical out of a printer today i brought home
08:24 PM rue_mohr: :) your getting into this
08:25 PM rue_mohr: do you know if their logic level or raw phototransistor?
08:25 PM rue_mohr: the reciever on the logic level ones has 3 pins
08:25 PM rue_mohr: otherwise its just 2x 2pin opto parts
08:25 PM zhanx: 3 pins
08:25 PM rue_mohr: nice
08:25 PM zhanx: only keep the 3 pin ones
08:26 PM rue_mohr: (3 pins on the photo reievcer? all the modules have 3 pins)
08:26 PM zhanx: I got a *few* of them
08:26 PM rue_mohr: oh I should shoot you my schematic for the other ones
08:26 PM zhanx: k
08:26 PM rue_mohr: easy reciever
08:31 PM rue_mohr: Tom_L, do you have a *NICE* table for min bend rad. for aluminum?
08:32 PM rue_mohr: I'd check the bible, but it usually makes things so complex I give up
08:32 PM Tom_L: ?
08:33 PM Tom_L: http://www.cumberlandmetals.com/aluminum/minimum-bend-radii/
08:34 PM rue_mohr: yeaI dont know what alloy
08:34 PM rue_mohr: what marine grade?
08:34 PM Tom_L: http://www.nalco.co.nz/sites/default/files/NALCO%20catalogue%20TECHNICAL%202009%20P17-20%20Bending%20Aluminium.pdf
08:34 PM Tom_L: no idea
08:34 PM rue_mohr: ok
08:35 PM * rue_mohr goes back to sleep
08:35 PM zhanx: marine grade with a coating or is it somehting special?
08:35 PM rue_mohr: its more pure
08:35 PM rue_mohr: it can sit it salt water without eating itself
08:35 PM zhanx: oh nice
08:36 PM Tom_L: pure in what way?
08:36 PM Tom_L: it's a chemical makeup
08:36 PM rue_mohr: impurities cause electrollysis within the metal
08:36 PM zhanx: i thought the best was aircraft grade
08:36 PM rue_mohr: zhanx, I dont know how it compares
08:37 PM Tom_L: all we carry around here is aircraft grade
08:38 PM rue_mohr: yer not on the ocean tho
08:38 PM Tom_L: yeah we just fly over it
08:38 PM rue_mohr: hey
08:38 PM rue_mohr: I kno what sI should o
08:38 PM * rue_mohr goes and takes apart the 2 stroke again
09:30 PM rue_mohr: ok, design flange()
09:31 PM zhanx: you need a 3d laser scanner
09:32 PM rue_mohr: "ARG MY EYE!!!!!"
09:32 PM rue_mohr: (do not shine laser into remaining good eye)
09:38 PM zhanx: i got the laser module out of the big laser jet i took apart today
09:41 PM zhanx: gonna swap out the ir laser for a red one and use it in a 3d scanner after the printer is done
09:41 PM rue_mohr: :)
09:42 PM zhanx: yes now that i am back into IT again I am getting parts alot!
09:43 PM zhanx: i wonder if i should setup a thin net server
09:43 PM rue_mohr: I think the flange on that engine is so small I can 3d print a test
09:44 PM zhanx: or ink it and roll paper on it, scan that \
09:44 PM zhanx: easy
09:45 PM rue_mohr: I made cad model
09:45 PM rue_mohr: just need to do a fit-test
09:46 PM rue_mohr: gonna 3d print it and see
09:46 PM rue_mohr: if its fits, there will be lots of work to do
09:46 PM rue_mohr: I need to work out how to take it to a muffler port of some kind
09:46 PM rue_mohr: nice if the mecha didn't sound like a 2 stroke dirtbike
09:46 PM Tom_L: why do you need a thin net server?
09:46 PM * rue_mohr notes to rule out 2 stroke dirtbike mufflers
09:47 PM rue_mohr: needs to keep his network lean
09:47 PM Tom_L: i heard someone else mention something about them a couple days ago
09:48 PM Tom_L: just wondered the advantage if any
09:48 PM zhanx: Tom_L: pcs for the kids, image resets on boot, and its free
09:48 PM zhanx: plus low power
09:49 PM zhanx: i got 4 yesterday, that i can "toss out" i kept to think about using
09:50 PM rue_mohr: TO THE PRINTER!
09:50 PM Tom_L: rue_mohr
09:50 PM Tom_L: show us the cad model
09:52 PM zhanx: crap i thought my job tomorrow was at 9am, its 9 PM
09:52 PM Tom_L: oops
09:52 PM zhanx: installing new touchscreens in Mcdonalds as the min wage just went up again
10:02 PM rue_shop3: did that work?
10:02 PM zhanx: did what work?
10:03 PM rue_shop3: http://ruemohr.org/~ircjunk/images/pi/IMG04Apr2018_030039.jpg
10:03 PM rue_shop3: Q&D engine flange test
10:04 PM zhanx: print time?
10:06 PM rue_mohr: OOO CLOSE
10:09 PM rue_mohr: small engine eh?
10:10 PM rue_mohr: just think z, 3d print custom gaskets
10:10 PM Tom_L: not if they need to withstand heat
10:11 PM rue_mohr: HT silicone?
10:11 PM Tom_L: is that the mount?
10:11 PM rue_mohr: thats the pattern on the top of the leg
10:11 PM rue_mohr: (of the boat engine)
10:11 PM Tom_L: pics are in order
10:11 PM rue_mohr: I need to make a new pan for it that seperates out the cooling jacket and the exhaust
10:12 PM rue_mohr: http://ruemohr.org/~ircjunk/images/pi/IMG04Apr2018_030039.jpg
10:12 PM rue_mohr: or the engie?
10:12 PM Tom_L: i'm looking at 39 now
10:12 PM Tom_L: the other physical part
10:13 PM rue_mohr: http://ruemohr.org/~ircjunk/robots/sparrow1/p1090884.jpg
10:13 PM rue_mohr: you can see the 3 bolts just over the blue bit
10:13 PM rue_mohr: thats half that bolt pattern
10:13 PM Tom_L: horizontal or vertical?
10:13 PM rue_mohr: engine shaft?
10:17 PM Tom_L: the 3 bolts in a horizontal line just above the blue mount?
10:19 PM zhanx: 3d print with rtv
10:20 PM * katsmeow looks around in circles
10:20 PM rue_mohr: z :)
10:20 PM zhanx: tom and rue are here
10:20 PM rue_mohr: kat
10:20 PM rue_mohr: http://ruemohr.org/~ircjunk/images/pi/IMG04Apr2018_030039.jpg
10:21 PM rue_mohr: START OF NEW PAN FOR
10:21 PM rue_mohr: http://ruemohr.org/~ircjunk/robots/sparrow1/p1090884.jpg
10:30 PM * rue_mohr imaptently tapps fingers on desk.... hmmm
10:30 PM rue_mohr: OK, ONE more print tonight
10:36 PM * katsmeow was looking at the tornadoes rolling in
10:36 PM katsmeow: http://images.intellicast.com/WxImages/Radar/tvr.gif
10:38 PM katsmeow: rue , i do not see how http://ruemohr.org/~ircjunk/robots/sparrow1/p1090884.jpg can get traction to walk around
10:39 PM katsmeow: are you sure, with the foot removed, that it has oil pressure in the engine?
10:39 PM rue_shop4: AND A BORRING _4_ MINUTES LATER...
10:39 PM rue_shop4: 2 stroke, oil pressure should be about 0
10:39 PM katsmeow: ok
10:41 PM rue_shop4: ok, I will check it tommorow
10:42 PM rue_mohr: katsmeow, the important bit is the water jacket
10:42 PM katsmeow: ok
10:42 PM rue_mohr: when Iget this right, I'll make up a positive for casting a new pan for it
10:43 PM rue_mohr: I wonder what the exhaust pipe size for a 2HP 2 stroke should be
10:43 PM rue_mohr: about 3/4"?
10:43 PM rue_mohr: 1"?
10:43 PM katsmeow: prolly
10:44 PM katsmeow: some baby car engines seem to be about 1.5 inches
10:45 PM katsmeow: depends on such things as restrictionin bends, and what fits the downstream muffler
10:45 PM katsmeow: tv series "Rocky Mountain Railroad" , seems to focus on Canadian RR
10:46 PM rue_mohr: siounds right
10:46 PM rue_mohr: and familiar
10:46 PM rue_mohr: baby car
10:46 PM rue_mohr: 60Hp? 40?
10:46 PM * rue_mohr looks at kat and zhanx
10:47 PM katsmeow: non turbo, 4 cyl, VW 45hp early versions, twin 1" pipes out the back from the mufflers
10:48 PM katsmeow: i don;t think the 65 hp versions were any bigger
10:48 PM rue_mohr: 45hp = 1"
10:48 PM rue_mohr: 1/45*2 =
10:48 PM katsmeow: my 4cyl turbo max 145hp is ~ 1.75 pipe
10:48 PM rue_mohr: .04"
10:48 PM rue_mohr: cool!
10:49 PM * rue_mohr designs the mecha fro a .04" exhaust
10:49 PM katsmeow: save weight too, use plastic
10:49 PM rue_mohr: teflon
10:50 PM rue_mohr: that size will be cheap from china
10:50 PM rue_mohr: ~1mm
10:50 PM rue_mohr: (I'm rounding down)
10:50 PM * katsmeow nods
10:51 PM rue_mohr: https://www.aliexpress.com/item/PTFE-Teflon-Tubing-Pipe-ID-1mm-OD-2mm-Brand-New-Wire-Protection/32606578928.html
10:51 PM rue_mohr: available in COLOURS!
10:51 PM katsmeow: High Voltage Wiring (insulation not included)
10:51 PM rue_mohr: maybe clear, so I can locate blockages
10:52 PM rue_mohr: like if the piston gets stuck in it
10:52 PM rue_mohr: (gonna be running fast ya know)
10:52 PM Tom_L: 3/4" should suffice
10:52 PM Tom_L: if that
10:52 PM rue_mohr: :)
10:53 PM rue_mohr: your just worried I already bought the 1mm teflon...
10:53 PM Tom_L: my racing engines were about that with maybe a 1/2" stinger
10:53 PM rue_mohr: "Why is this wire so HOT!???" "its the engine exhaust!"
10:54 PM katsmeow: i think i used 3/4 iron and 3/4 emt on the baby generator
10:54 PM rue_mohr: should I go 1" just in case? I'm gonna have to cast this from aluminum
10:54 PM katsmeow: beware vibration being enough to pull the threads right outa the bolt holes in the head
10:54 PM rue_mohr: bolt holes aren't in the head
10:55 PM rue_mohr: vert shaft, thats the whole side of the engine
10:55 PM katsmeow: they are on my B&S
10:55 PM Tom_L: http://www.dragonfly75.com/motorbike/ECtheory.html
10:55 PM Tom_L: 2x the HP easy
10:55 PM rue_mohr: right
10:56 PM rue_mohr: currently the exhaust port goes down the leg into the water
10:56 PM Tom_L: diaper?
10:56 PM rue_mohr: with the waste cooling water
10:56 PM rue_mohr: new pan
10:56 PM rue_mohr: seperate out the exhaust and the coolant
10:56 PM rue_mohr: and the shaft...
10:57 PM rue_mohr: which I'm not sure how to deal with yet
10:57 PM rue_mohr: I think with 2:1
10:57 PM Tom_L: your pan will need a shaft seal
10:58 PM rue_mohr: nope
10:58 PM Tom_L: or does it go around it
10:58 PM rue_mohr: the engine is sealed
10:58 PM Tom_L: where's the water go?
10:58 PM rue_mohr: the only thing it dosn't have with the leg on is half the pathways for the water jacket
10:58 PM rue_mohr: around the top of the cylinder from what I can tell
10:58 PM rue_mohr: possibly over the top too
10:58 PM rue_mohr: its plugged, so I'll know more "soon"
10:59 PM rue_mohr: have to pop it apart and clean it out
10:59 PM * Tom_L wonders if rue_mohr can put humpty dumpty back together again
10:59 PM rue_mohr: yes, tho I need to be carefull with the cylinder gasket
11:00 PM Tom_L: probably copper
11:00 PM rue_mohr: or that stupid pressed foil/mica !@%$@#^!
11:00 PM Tom_L: well mine were because they were raced
11:00 PM rue_mohr: that delaninates so easy
11:00 PM rue_mohr: actaully, prolly not copper
11:01 PM rue_mohr: casue its alumium engine and salt water cooling
11:01 PM Tom_L: not anymore
11:02 PM Tom_L: unless you're gonna take the mech deep sea diving
11:02 PM rue_mohr: yea, it'll have nice clean antifreeze coolant
11:02 PM rue_mohr: circulated by... something...
11:03 PM Tom_L: mine were water cooled as well
11:03 PM rue_mohr: I wonder how many WHAT I need
11:03 PM rue_mohr: oo, never seen a water cooled b&s
11:03 PM Tom_L: mine used boat movement as the pump
11:04 PM katsmeow: "Factors affecting temperature--> more compression gives less temperature (because the mixture burns quicker. a compression ratio of 7:1 is 40 C hotter than 9:1)" <<== ah, that explains why diesels run so cool
11:04 PM rue_mohr: wait... I thought you said gocart?
11:04 PM Tom_L: i had one of those too
11:05 PM Tom_L: it was air cooled though
11:05 PM rue_mohr: yea
11:05 PM rue_mohr: is there a water cooled 2 stroke b&s for land?
11:05 PM Tom_L: those little red headed ones i posted a while back were for the boat
11:05 PM rue_mohr: er, wait, isn't 2 stroke outlawed now?
11:05 PM rue_mohr: env.?
11:05 PM Tom_L: not that i know of
11:06 PM katsmeow: it is on boats
11:06 PM Tom_L: weed eaters are 2 usually
11:06 PM rue_mohr: nope, here 4 now
11:06 PM katsmeow: i think all non-hand-held mowers must not be 2-cycle
11:07 PM rue_mohr: goodbye lawn boy
11:09 PM * Tom_L wonders where that beaten path in 84 leads to
11:09 PM Tom_L: that's alot of rue stomps
11:10 PM rue_mohr: ?
11:10 PM Tom_L: http://ruemohr.org/~ircjunk/robots/sparrow1/p1090884.jpg
11:10 PM Tom_L: noticeable beaten path
11:10 PM rue_mohr: hah oh
11:10 PM rue_mohr: thats the path from the front of the house directly to the shop
11:11 PM Tom_L: surprised it's not a rut then
11:11 PM * katsmeow assumed it was trodden
11:13 PM rue_mohr: damn, I made that finger 3 years ago
11:14 PM rue_mohr: http://ruemohr.org/~ircjunk/robots/sparrow1/p1040018.jpg
11:14 PM rue_mohr: 2012!!! ARG
11:14 PM rue_mohr: I should be father along
11:14 PM rue_mohr: farther
11:15 PM Tom_L: your neighbors ever question what you do?
11:15 PM rue_mohr: only the day I accidently exploded propane in the boiler
11:15 PM rue_mohr: my ear was ringing for 3 days
11:15 PM Tom_L: woops
11:16 PM rue_mohr: yea, i decided propane starter was a bad idea
11:17 PM zhanx: air start it
11:17 PM Tom_L: http://i.dailymail.co.uk/i/pix/2014/08/27/1409141075145_wps_2_dmvidpics_2014_08_27_at_1.jpg
11:19 PM katsmeow: the firebox should be ventilated no mater what fuelyou use.. my sister lost her eyebrows after opening a bbq grill, without propane
11:22 PM rue_mohr: it is
11:22 PM katsmeow: why did it detonate then?
11:23 PM rue_mohr: good point... cant remember
11:43 PM katsmeow: operations rule i canot remember in entirety for a B&W boiler were : blower shall be on high min 5 minutes to clear the air in the firebox before applying fuel and spark
11:43 PM katsmeow: some rule about boat engines includes blower operation before cranking it over
11:44 PM katsmeow: strangely, the exhaust pipe can still be full of avgas even if you follow the rules
11:44 PM katsmeow: or propane