#robotics Logs
May 05 2014
#robotics Calendar
00:01 GuShH_ I should probably clean things up and organize more.
00:01 rue_more wow
00:01 rue_more brazed his own bits?
00:01 GuShH_ they actually sell blank "chips" to braze
00:02 GuShH_ but I'm not sure if that's a thing anymore
00:02 GuShH_ inserts and all.
00:02 rue_more yea
00:02 GuShH_ I only have one indexable tool heh
00:02 rue_more never thought of a machinist building himself a bit
00:03 rue_more I thought I would be all good and get LH/RH and center carbide for myself when I got the lathe
00:03 rue_more then I started breaking the carbide inserts
00:03 GuShH_ I'm happy enough with hss
00:03 rue_more I'm happier with it
00:03 rue_more if I ever need to rough off mean metal, I'll use the carbide
00:04 GuShH_ at least I can make any tool shape I want and touch it up in minutes
00:04 rue_more yea
00:04 rue_more I'm tempted to stock up more on blanks, but I'm pretty ok
00:04 rue_more http://ruemohr.org
00:04 GuShH_ but I do use most of the old ground tools I got from the lot, they have nice relief angles, very well made.
00:04 GuShH_ I just touched up the edges.
00:04 rue_more http://ruemohr.org/~ircjunk/projects/lathe/p1050162.jpg
00:05 rue_more I got hte wrong size center bits :/ didn't understand how they measure them
00:05 GuShH_ ohh he had a massive boring bar
00:05 GuShH_ seemed like tempered steel, with an hss bit on the end... but I didn't buy it
00:05 GuShH_ way too big for this lathe size.
00:05 GuShH_ long as a 19 inch screen more or less.
00:05 GuShH_ inch or so thick
00:06 MrCurious May the fourth be with you!
00:06 GuShH_ Hmm I mostly use the 3.15mm center bit, then I have a 2mm one and 4MM, the other one is imperial, don't know off hand
00:06 GuShH_ more or less 5mm or so
00:06 rue_more http://ruemohr.org/~ircjunk/projects/lathe/p1050855.jpg
00:06 GuShH_ 3.15 seems the most common
00:07 rue_more if I'm cutting plastic, I tend to make bits from mild steel
00:07 GuShH_ I made a parting tool out of mild steel, it actually works on aluminum but it's not great.
00:07 GuShH_ (water quenched, then tempered to straw)
00:07 rue_more so far I have a 60degree, that bullnose, and a special shaped one I made today for pully grooves
00:08 GuShH_ I need to finish my "scissor" knurler
00:08 GuShH_ I got most parts cut out of steel, I need to machine them
00:08 rue_more I have a carbon gouging rod I was playing with on my arc welder, went back and forth over a peice of steel for a while, no result
00:08 rue_more **accept, later, I went to bend it, and it snapped
00:09 rue_more it **was** mild steel
00:09 GuShH_ something like the silver one http://www.practicalmachinist.com/vb/attachments/f38/85850d1379033176-hardinge-cut-knurler-scissor-knurl-1.jpg
00:09 GuShH_ but less nice
00:09 rue_more oh oh oh lets see, I still have this url up : http://www.projectsinmetal.com/free-metalworking-project-plans-a-knurling-tool/
00:09 GuShH_ very simple, but it takes some time
00:10 GuShH_ I also didn't know the size of knurling wheels... the only set I got is 1mm
00:10 GuShH_ which is huge
00:10 rue_more hey, I thoguht I ordered some wheels for me
00:10 GuShH_ you sort of need a milling machine to make the one from that link
00:10 rue_more I wanted to get some striaght ones
00:10 GuShH_ I'm making one on a drill press
00:10 GuShH_ it's sad, I have endmills and a lot of crap I can't use
00:10 rue_more he did it all on a lathe :)
00:10 rue_more see the pattern on the block?
00:10 GuShH_ well I do use them on the lathe to get flat holes, but that's not milling
00:11 GuShH_ I don't have a milling vise to cut the slots etc
00:11 rue_more reverse it
00:12 GuShH_ I'm sort of doing that already
00:12 GuShH_ using two parts for each arm
00:13 GuShH_ those are some nice screws... probably made with a slitting saw
00:13 rue_more 1050889
00:14 GuShH_ ?
00:14 rue_more 1 min
00:14 rue_more it looks like I didn't post it
00:14 rue_more !?!?!
00:15 rue_more oh you said milling vise
00:15 GuShH_ preload nut clears nicely inside the quill assembly, but there's been a slight miscalculation, I can't use the angle grinder tool to adjust the nut, I'll need something else.
00:15 GuShH_ it won't fit by 1mm
00:15 GuShH_ they do make smaller ones, but I'm not buying one.
00:16 rue_more http://ruemohr.org/~ircjunk/projects/lathe/p1050887.jpg
00:16 GuShH_ I'll probably take some mild steel and shove a couple pins through
00:16 rue_more http://ruemohr.org/~ircjunk/projects/lathe/p1050888.jpg
00:16 rue_more http://ruemohr.org/~ircjunk/projects/lathe/p1050889.jpg
00:16 rue_more you could just bolt it to a plate
00:16 GuShH_ rue_more: milling vise lets you go up and down though
00:17 GuShH_ which makes it a bit useful, but not as good as a real milling machine
00:17 rue_more I didn't need it I have shims!
00:17 GuShH_ to cut slots and such
00:17 GuShH_ haha the socket working as a jack
00:17 rue_more they come in a variety of lengths
00:17 rue_more :)
00:18 GuShH_ I want to make a set of jacks..
00:18 GuShH_ tiny jack stands and bigger ones
00:18 rue_more so, anyhow, thats how I milled a simple slot
00:18 rue_more you saw...
00:19 GuShH_ I don't think I'll be able to make enough space to fit a knee mill here...
00:19 GuShH_ a bench mill costs almost as much, and it's ten times worse...
00:19 rue_more I didn't post it!
00:19 GuShH_ problem with big mill: parts are big, thus heavy... back problems = can't lift the parts
00:20 rue_more http://ruemohr.org/~ircjunk/projects/lathe/p1050934.jpg
00:20 GuShH_ oh I got a huge broken endmill... I wonder if I could grind it a shaft
00:20 rue_more http://ruemohr.org/~ircjunk/projects/lathe/p1050935.jpg
00:21 GuShH_ though one of the cutters is chipped
00:21 rue_more http://ruemohr.org/~ircjunk/projects/lathe/p1050936.jpg
00:21 GuShH_ seems it caught, somehow, maybe the work wasn't held properly and SNAP
00:21 GuShH_ 1 inch endmill flying off.
00:21 rue_more damn, I didn't take a pic of the nice big L bracket I made
00:21 GuShH_ those are rather expensive when new.
00:21 GuShH_ L bracket... I want a 90° iron plate
00:22 rue_more see ^^ the gig for cutting the arc into the plastic?
00:22 GuShH_ yeah
00:25 GuShH_ http://www.projectsinmetal.com/making-a-g0602-cross-slide-retractor/
00:25 GuShH_ that's nice
00:27 GuShH_ mill this, mill that... bah
00:30 rue_more give me a half hour to eat, I'll post a pic of my L bracket
00:30 rue_more I made it from the 1/2" steel plate I found in the counterweight of a copier
00:31 GuShH_ lol
00:31 GuShH_ still doesn't beat my "window weight iron"
00:31 rue_more 3 peices ea of 4" x like 24" 1/2" steel plate
00:32 rue_more I'm sad, I think I threw one out thinking they used bricks or concrete like everone else does
00:32 GuShH_ I was going to throw this one out but I broke it open and found the prize inside
00:33 GuShH_ I also found a broken cylindrical fishing weight, but it turned out to be steel
00:34 rue_more I'v wondered if there is anything out there designed a particular way so the designer could scavange parts when they started to get thrown out
00:34 GuShH_ although it had pitting from casting and it was a rough shape... but it turns like steel
00:35 GuShH_ in fact, like free machining steel... 1 inch rod or so, looks very nice. I got that "new tool" polished look
00:35 GuShH_ helps to play with the tool angle
00:35 rue_more you saw the handle I made up for the toolpost?
00:35 GuShH_ yeah
00:35 rue_more silly but sooo comfortable
00:35 GuShH_ lol
00:36 rue_more my palm has never thanked me more for anything
00:36 GuShH_ the stock handles are so short and flimsy there's no way to use them
00:36 rue_more I was surprised that mine was bent when I took it off
00:36 GuShH_ I had to extend the tailstock lock handle with a chunk of aluminum rod
00:36 rue_more I didn't know I'd hit it that hard
00:37 rue_more I dont really use the tailstock lock
00:37 GuShH_ until I get around to make a whole new one from scratch
00:37 GuShH_ I do when I turn between centers
00:38 rue_more I need to work out a dog
00:38 GuShH_ or when I'm changing bits on the chuck, just a habit.
00:38 GuShH_ lol
00:38 rue_more like to do a betwen centre project sometime
00:38 GuShH_ I improvised one yesterday for the drillpress spindle
00:38 GuShH_ machinist clamp, bit of all thread and 4 nuts, oh and a washer. it was scary but it worked.
00:39 GuShH_ I threaded it between centers and it went fine, but I wouldn't do it again
00:39 GuShH_ used a small stubby clamp as the "dog" and the bolt to hold it to the face plate
00:39 GuShH_ which by the way does not run true with the spindle...
00:39 GuShH_ first time I use it
00:40 GuShH_ don't think I took a pic...
00:41 GuShH_ basically the shaft had a square portion, which meant the clamp could get ahold of it very easily
00:41 GuShH_ otherwise you need a setscrew or a flat of some sort
00:41 GuShH_ those clamps have a lot of uses.
00:45 GuShH_ I had to do it between centers anyway because I had a taper on one end and a square profile on the other, it was that or the 4 jaw chuck and a lot of dialing in... also, I wanted to see the runout on the shaft.
00:45 GuShH_ no need to get the thread perfectly concentric otherwise
00:48 GuShH_ some of the small ones http://gushh.net/tmp/dscn5309f.jpg
00:48 rue_more you didn't taper check before you started?
00:48 rue_more http://ruemohr.org/~ircjunk/projects/lathe/p1060012.jpg
00:48 rue_more http://ruemohr.org/~ircjunk/projects/lathe/p1060013.jpg
00:48 GuShH_ what do you mean? the spindle had center drills on both ends, it was originally turned between centers
00:48 rue_more I expect to put a web on the back, but I want to drill the holes first
00:49 MrCurious you making high test book ends?
00:49 ShH_ doesn't fo
00:49 rue_more material holders for the lathe
00:49 MrCurious rue_more: http://ruemohr.org/~ircjunk/projects/lathe/p1060013.jpg
00:49 GuShH_ parallel machinist clamps
00:49 rue_more so I can mount work to the carrige
00:49 MrCurious ahhh so more a right angle mount
00:49 rue_more yea
00:49 rue_more http://ruemohr.org/~ircjunk/projects/lathe/p1050936.jpg
00:49 rue_more that was funkey and made me think
00:50 MrCurious i have the same cailpur i think
00:50 GuShH_ I did use layout dye on the J16 (I think it's that size) of the spindle to see where it was rubbing against the chuck taper, it had a high spot which I took care of
00:50 GuShH_ MrCurious: we all have the same digital caliper
00:50 rue_more the one with the serial port ;)
00:50 GuShH_ mine got to that point where oil began to affect it
00:50 MrCurious true, they were issued to all men back in 2005
00:50 GuShH_ the port I never use.
00:50 rue_more yea :/
00:51 MrCurious secret serial port... shhhhhh
00:51 rue_more but I have it!
00:51 MrCurious mine too
00:51 GuShH_ lol
00:51 MrCurious even has a secret door
00:51 MrCurious :O
00:51 GuShH_ I looked up the actual cable
00:51 GuShH_ costs more than the caliper
00:51 GuShH_ I laughed.
00:51 MrCurious level changer, 3 wires ftdi
00:52 GuShH_ I need to get some of those "iGaging" digital readout gimmicks... but they are reselling them here for 3 times the asking price, which is nuts
00:52 MrCurious that seems like it should be a COTS board... a level shifting serial to usb
00:52 MrCurious for that matter a level shifting i2c/serial to usb
00:52 GuShH_ err yes but I don't tend to solder wires to my tools
00:52 orlock nokia USB cable!
00:52 MrCurious i thought it could be useful for a closed loop 3d printer or small mill
00:52 GuShH_ ah for the tailstock quill on a lathe it could work
00:52 GuShH_ but they do make digital rulers for that
00:53 GuShH_ which of course I can't buy
00:53 GuShH_ rue_more: I have about 80KG worth of clamps outside I need to clean up and store... but I don't have a container big enough to derust them all at once :(
00:54 GuShH_ I probably cleaned up 20 of them and I got tired.
00:55 orlock clamps?
00:55 orlock hire them out to your local BDSM club
00:55 GuShH_ like these but bigger http://gushh.net/tmp/dscn5309f.jpg
00:55 orlock they should give them back nicely oiled
00:55 GuShH_ those were a pile of rust when I got them, still some rust here and there
00:55 GuShH_ I blackened some of the screws
00:55 rue_more what do you derust them with?
00:56 GuShH_ electrolysis
00:56 rue_more anode?
00:56 orlock not molassis? (sp)?
00:56 GuShH_ they form the cathode
00:56 GuShH_ chunk of steel is the anode
00:56 rue_more cool
00:56 rue_more have to play with that
00:56 rue_more what current/how long?
00:56 GuShH_ it's the aftermath that becomes annoying, I don't have the right acid to clean the poop left over from the cleaning process, so I have to scrub them by hand
00:57 GuShH_ rue_more: irrelevant, I found out it doesn't really matter as long as it's not "too much to boil the electrolyte"
00:57 GuShH_ and when I do it outside, I use plain table salt... who cares.
00:57 GuShH_ washing soda for indoors.
00:57 GuShH_ open a window or two if you worry about the hydrogen buildup
00:57 GuShH_ it stops on it's own
00:57 GuShH_ I would never buy rusty stuff otherwise.
00:58 rue_more I should make a big setup, I have some brake drums to deal with
00:58 rue_more :)
00:58 GuShH_ that will clean up nice
00:59 GuShH_ some of them in the condition I got them http://gushh.net/tmp/p21-04-14_16.31f.jpg
00:59 rue_more thats not so bad
00:59 GuShH_ the "table" is twice as long, all covered with clamps.
00:59 rue_more (wow)
00:59 GuShH_ some were covered in grease, this process is like ultrasound, it actually pops all the crap out
00:59 GuShH_ thanks to the hydrogen formation
00:59 GuShH_ problem: parts will flash rust very fast after you rinse them out
01:00 GuShH_ so quick scrub, quick dry and oil.
01:00 orlock mild acid bath?
01:00 GuShH_ yes the acid that they use on coke... I forgot
01:00 GuShH_ phosphoric acid I think
01:01 GuShH_ that will remove the converted rust
01:01 GuShH_ so ideally electrolysis -> phosphoric acid -> rinse -> dry -> oil
01:01 orlock http://boingboing.net/2014/04/15/how-to-force-a-patina-on-carbo.html
01:02 GuShH_ rue_more: I was a) late to the party, he had much bigger ones in the lot but they got sold b) I didn't know they were these many, I paid 100 dollars for all of them without knowing what I was getting... which sounds like a lot, but two of those tiny eclipse clamps cost that much brand new. plus I can sell the surplus any time.
01:03 GuShH_ 75 or so clamps in total
01:03 GuShH_ I only expected 10-20 tops
01:03 GuShH_ I don't understand why he had so many.
01:04 orlock bsdm master maybe
01:04 GuShH_ toolmaker, maybe he had a big shop
01:05 GuShH_ I try not to let things go by anymore, too many regrets.
01:05 GuShH_ I let a lot of high quality live centers, jacobs chucks, etc. go because I didn't feel they were worth as much or I couldn't be arsed to change the bearings on one of them, etc. instant regret once someone else bought them.
01:06 GuShH_ orlock: why would you want to get a patina like that on a nice knife?
01:06 rue_more corrosion resistance
01:06 orlock To prevent the bad rust?
01:07 GuShH_ why would it rust?
01:07 GuShH_ if you store them properly it shouldn't
01:07 GuShH_ and it will anyway that's not a complete passivation!
01:08 GuShH_ I look at used machines and my stomach churns... http://imgur.com/OctgcTC
01:08 rue_more awe
01:08 GuShH_ have you no self respect.
01:09 GuShH_ some people should not be allowed to own machines
01:09 GuShH_ I bet it would restore just fine, but it's missing half the machine.
01:09 rue_more look at the huge crack
01:09 GuShH_ where
01:09 rue_more up the side
01:09 GuShH_ holy shit
01:09 rue_more its got a huge split in it
01:09 GuShH_ how!!
01:09 rue_more I wonder if it was dropped
01:10 GuShH_ that's the first time I see that
01:10 GuShH_ damn
01:10 GuShH_ that's pretty much scrap to me.
01:10 orlock i thought something maybe roleld into it and hit the protrustion, but what would be able to do that?
01:10 GuShH_ wait, that's a wire
01:10 rue_more I wonder if something jammed and the gearbox pushed the pedistal apart
01:10 orlock "Sorry, i reversed the house into your mill..."
01:10 GuShH_ I believe it's an old wire
01:11 GuShH_ flash makes it seem as a crack
01:11 rue_more no, look at the bottom
01:11 GuShH_ call CSI
01:11 rue_more its a case split
01:12 ShH_ runs diagnos
01:12 rue_more and that handle looks like its not been turned in a loooong time
01:12 orlock GuShH_: Also, its a $15 carbon steel knife
01:13 GuShH_ orlock: meh
01:13 GuShH_ so the question is why buy a $15 knife
01:14 GuShH_ rue_more: analysis complete, it's a wire.
01:14 rue_more http://articulo.mercadolibre.com.ar/MLA-501886329-fresadora-universal-con-herramientas-o-p-o-r-t-u-n-i-d-a-d-_JM
01:14 rue_more 14000 and its split?
01:14 orlock GuShH_: Its sharp and cuts well apparently?
01:14 GuShH_ divide by 10
01:14 GuShH_ I can sharpen a rock too
01:15 GuShH_ rue_more: for that kind of money I can get a proper knee mill, I was just shocked at the price and condition, but it does include tooling
01:15 GuShH_ as in, everything in the shed that corresponds to the machine
01:15 GuShH_ probably some steel stock as well, but still too expensive
01:16 rue_more ok I found larger image, maybe its a wire...
01:16 but the guy was a bit sketchy, he said someone had bought it, but they never picked it up... that I should hurry up...
01:17 rue_more the image of the other side has a bunch of other brown wires
01:17 Hyratel1 $1.80?
01:17 GuShH_ k
01:17 Hyratel1 that's not how you write $1.80
01:17 rue_more that site dosn't work for me
01:17 GuShH_ thousand.
01:17 Hyratel1 then you mean $1,800
01:17 GuShH_ the used machines are all in terrible condition
01:17 GuShH_ Hyratel1: no, we don't use ,
01:18 rue_more I'm sure that thing has no motor tho
01:18 Hyratel1 if you say USD, then you use US notation
01:18 GuShH_ I wouldn't buy that thing
01:18 GuShH_ Hyratel1: no.
01:18 rue_more I wonder if the overhead peices are all there
01:19 GuShH_ the horizontal milling stuff isn't
01:19 rue_more it would cost $14000 in labour to rebuild
01:19 GuShH_ but also, these are clueless sellers
01:19 GuShH_ "it was my uncle's"
01:19 rue_more power knee :)
01:20 GuShH_ they're all in terrible condition for that kind of money here
01:20 GuShH_ 3k gets you something very nice
01:20 rue_more I wonder if it was oiled down when it was stored
01:20 GuShH_ nope
01:20 GuShH_ http://mla-s2-p.mlstatic.com/fresadora-vertical-mesa-1500-x-400-para-trabajos-pesados-12777-MLA20066334220_032014-F.jpg
01:20 rue_more if so, thats prolly 6 or 7 years
01:20 GuShH_ I can't house that though.
01:20 rue_more haha
01:20 rue_more or move it
01:20 GuShH_ right.
01:21 GuShH_ I don't even know how to operate that machine, it's got feeds everywhere.
01:21 rue_more "tool requires 600V, 40A, 3 phase power"
01:21 GuShH_ and you can't really take them apart
01:21 GuShH_ the body is the body.
01:21 GuShH_ haha
01:21 rue_more :)
01:21 GuShH_ it is 3 phase.
01:21 GuShH_ most are
01:21 rue_more one of my buddies has a machine like that
01:21 rue_more it fell off the truck getting to his place, but it only destroyed one handle
01:22 GuShH_ ouch
01:22 rue_more which was annoying, he'd just rebuilt it
01:22 GuShH_ an actual bridgeport costs about 9k or more...
01:22 rue_more its power everything
01:22 GuShH_ yeah with rapid feeds and all the fancy stuff
01:22 rue_more he has a knack for getting things from auctions where people just want to get rid of the stuff
01:23 rue_more "$1 you move it, thanks, bye"
01:23 GuShH_ but a tiny thing like this is not worth the money IMO http://mla-s2-p.mlstatic.com/agujereadora-fresadora-marca-netur-9383-MLA20014758542_122013-F.jpg
01:23 GuShH_ lol
01:23 GuShH_ people around here expect gold for all the crap they own, truth be told they are mostly buried in their shit (figure of speech)
01:23 rue_more he has a welding robot in a seacan in the back lot of a mill
01:23 rue_more its kneeled down as far as it goes to get in
01:24 rue_more it was a wirefeed welder, came with the power supply
01:24 rue_more it welds with 1/4" wire
01:24 rue_more :)
01:24 GuShH_ you should be more like your buddy and get yourself some robotz
01:24 rue_more he has much morepowerfull means than I do
01:24 GuShH_ have it stir your cup of coffee
01:25 GuShH_ that's a nice tiny mill, but the problem is the size...
01:25 rue_more he has the space and tools to move BIG thinks
01:25 GuShH_ and the cost, as much as the knee mill.
01:25 ShH_ doe
01:25 rue_more I'm still pondering building a mill
01:25 rue_more I dont know anyone else with a personal forklift
01:25 GuShH_ I've been looking for a mill oh about... 2 years now.
01:26 orlock rue_more: i know a guy over there that could do the job, but i think he's in calgary
01:26 rue_more I'm gonna go to bed
01:26 rue_more I'v had too much tea to sleep
01:26 GuShH_ this one makes me weep http://mla-s2-p.mlstatic.com/vendo-fresadora-universal-6428-MLA5059424730_092013-O.jpg
01:26 rue_more but, for the routine of it, I'm going to bed
01:26 GuShH_ I would bash his head in.
01:26 rue_more OUCH
01:27 rue_more at somepoint, someone decided it was scrap
01:27 GuShH_ like kat's bridgeport.
01:28 rue_more gnight
17:17 Hyratel1 hey guys, have any of yall found a site/shop where you can order variable resistors/pots by checkbox/pick-one? the parts selection filters on Digikey or Vishay or Mouser leave somewhat to be desired
18:14 GuShH_ rue_more: yey got the bearings.. 6201-LLU from NTN Taiwan... they didn't have anything better :(
18:15 GuShH_ but they're heaps better than the generic crap it had.
18:16 GuShH_ sadly there are no taper bearings this small
19:37 rue_more make some?
19:37 e_more thinks on
19:58 GuShH_ rue_more: lol?
19:58 GuShH_ I wouldn't dream of making a regular ball bearing, let alone a taper bearing!
19:59 GuShH_ but you can easily make brass bushings...
19:59 GuShH_ anyway, new bearings installed and preloaded
19:59 GuShH_ feels niiiiiice
19:59 GuShH_ ended up using a tiny vise grip to tighten the nut
19:59 GuShH_ nothing else would fit
19:59 GuShH_ I didn't want to make it taller than the quill
19:59 GuShH_ because otherwise it would take some of the travel
20:00 GuShH_ these are sealed bearings (rubber) they always seem too stiff to me
20:00 GuShH_ but seems they break in and become less tiff
20:00 GuShH_ stiff
20:00 GuShH_ otherwise I think it's all lost as heat, and the added friction removes some of the power available
20:01 GuShH_ I was going to throw away all the bad bearings I have but I realized they could be used as spacers if you remove everything
20:01 GuShH_ you get two "spacers" out of one
20:01 GuShH_ dimentionally accurate -enough- for most things
22:08 GuShH_ rue_more: such a difference with the new bearings and the preload!
22:08 GuShH_ no more wandering bit
22:35 rue_shop2 I want to make a conveyor, but I want it to be like 4' long
22:35 rue_shop2 GuShH_, sweet
22:36 rue_shop2 root@freebee5:/tmp# calc 48*2
22:36 rue_shop2 48*2 -->> 96.000000
22:36 rue_shop2 root@freebee5:/tmp# circle -c 96
22:36 rue_shop2 Radius is : 15.278874
22:36 rue_shop2 Diameter is: 30.557749
22:36 rue_shop2 Circumfrence is : 96.000000
22:36 rue_shop2 Area is : 733.385986
22:36 rue_shop2 Sphere area: 2933.543945
22:36 rue_shop2 Sphere volume: 14940.416016
22:37 rue_shop2 so, I would need to find a tire with a 30" diameter to use an innertube
22:39 GuShH_ o.o
22:44 e_shop2 tries to t
22:44 rue_shop2 hmm should I worry about making the buck converter on my power supply synchronous?
22:44 rue_shop2 150W/channel?
22:44 rue_shop2 how does this work
22:44 rue_shop2 30V 5A
22:45 rue_shop2 15*10
22:45 rue_shop2 150W
22:45 rue_shop2 thats a lotts whats
22:45 GuShH_ o.o
22:46 GuShH_ uhmm.. I need to turn a quill lock handle for the dp...
22:46 rue_shop2 hmm I think thats a full size at inductor core tho
22:46 GuShH_ what's the inverter for?
22:46 GuShH_ err converter
22:46 rue_shop2 2 channel power supply
22:47 rue_shop2 http://hackaday.io/project/296-Bench-power-supply
22:49 rue_shop2 I never thought of that, an old at supply is 150W
22:50 rue_shop2 3.5w on a bipolar switch
22:50 rue_shop2 97% isn't bad
22:51 rue_shop2 hmmm
23:03 rue_shop2 140m ohm to get the same drop
23:03 rue_shop2 I think the P channels I have are better than that
23:04 GuShH_ P channel, fancy!
23:04 GuShH_ so, will you make a boll aero model engine?
23:05 GuShH_ I'm missing some materials but other than that I have everything to start
23:19 rue_shop2 drawing?
23:19 rue_shop2 is it combustion of compression ?
23:19 rue_shop2 ok this is stupid
23:20 rue_shop2 I dont have any pnp that can take 5A and 30V, I dont have any P fets under 800mohm
23:36 rue_more 27p06, $1 ea
23:39 rue_more wow, irf4905 at 60c ea
23:58 rue_more :/ once again digikey has been an invalueable tool to select which transistors I buy from china...
23:59 rue_more I have the wattage loss down around .5 to .7w
23:59 rue_more that'll take 22 days... next...