#robotics Logs

Jun 08 2013

02:19 GargantuaSauce_ there are no restaurants open at 4 am >:|
02:20 MrCurious this new glue gun seems nice. so far it doesnt drip like the old one
02:20 MrCurious and its dual temp
02:20 MrCurious and uses huge honkin sticks
02:21 GargantuaSauce_ cool, i got a big one like that recently but havent used it yet
02:21 MrCurious i am test-running it
02:22 MrCurious hahahaha, hot glueing thermal printer paper has predictable results
02:26 MrCurious definitely worth the $9
02:26 MrCurious lately i have been glueing over all soldered wires to releave stress risk on the solder joint
02:26 GargantuaSauce_ i just use zip ties for that sort of thing
02:27 GargantuaSauce_ they're also my favourite general construction fastener :V
02:28 MrCurious i guess i just find hot glue pretty damn neat
02:28 GargantuaSauce_ yeah it is...and now that i have a hot air station i'm really out of excuses for not overusing it
02:29 MrCurious totally
02:32 GargantuaSauce_ i also have some polycaprolactone i need to figure out a good use for
02:32 GargantuaSauce_ it got less interesting when i built my mendel
02:36 MrCurious i have PLA for mine
02:36 MrCurious and a kick starter head
02:37 MrCurious and a single completed axis :( then i got distracted
02:39 MrCurious saw a touch screen laptop at walmart today
02:39 MrCurious i think touch screen laptops are a marvelous idea, and hope its here to stay
02:40 RifRaf 3 axis all running here making lots of stuff, just binned a bunch of bad tests cause table getting too many printed bits on it :)
02:41 MrCurious wonder if there are designs to print a hexapod
02:41 MrCurious have to be
02:41 RifRaf surely
02:42 RifRaf http://www.thingiverse.com/search?q=hexapod
02:42 MrCurious very nice
02:43 MrCurious anyone have verizon cell phone service?
02:43 GargantuaSauce_ there are a few, i dont like the way they all use the servos' spindles to bear the entire load of each joint
02:44 MrCurious there are servo's that have built in opposite swivel bearings
02:44 MrCurious to solve that
02:44 MrCurious do you have their "friends and family and obama plan"?
02:44 MrCurious but those servo's are oddly expensive for just that extra bearing
02:45 RifRaf i just glued nits onto the other sides to make them sorta servos from mg996
02:45 RifRaf bits*
02:45 GargantuaSauce_ yeah that is what i am going to do
02:47 MrCurious i was thinking that snaps like they sew into clothes would work adequately as a opposite swivel
02:49 GargantuaSauce_ oh that'll probably work way better than a damn radial bearing
02:54 MrCurious and they are cheap at craft stores
02:55 MrCurious only issue is alignment, but i imagine a jig made from wood to center it would be good enough to align it, then hot glue to mount it
02:57 MrCurious acked chromebook, i finally got its suspend on lid close working without going to 100% cpu on resume
02:57 MrCurious and now when i close the lid, it reboots. guess its reinstall time
03:00 GargantuaSauce_ i did an update on my ultrabook and now refind hangs instead of booting the kernel :)
03:01 MrCurious luckily, install is pretty painless
03:01 MrCurious (and i have backups on the nas in case i miss anything important)
03:02 MrCurious another school shooting
03:02 MrCurious WTF is wrong with people
03:02 theBear hehe, you said wood
03:02 MrCurious you ever work with wood bear?
03:03 theBear yeah, i'm an experienced luthier, carpenter (framing, finishing, cabinet/joinery and even speaker cabinet) and dabble with my lathe when i'm at grans place
03:03 eBear loves
03:04 MrCurious what do you like best about wood...
03:04 MrCurious already regretting asking
03:05 theBear lol, erm, it's not absolute like metalwork maybe, you can force/bend/compress things to make them work nicely, instead of having to be deadly laser accurate with everything and just hope you didn't mess up even a tiny bit
03:06 theBear also most stuff can be done with cheap handtools that i have, and it's cheap, and useful
03:06 MrCurious wish i would have bought a CNC instead of a full wood/metal shop
03:06 MrCurious hind sight...
03:07 theBear meh, cnc are cool and all, but a full wood AND metal shop lets you do a LOT more things, tho not all of them are as cool as a robot slicing a block of solid metal into some intricate shape :)
03:08 theBear and on a day to day basis, cnc operation is mostly annoying setup problems/issues, and sitting around waiting with earmuffs on... with a full shop you actually get to do things, hone your awesome skils
03:08 theBear skills
03:09 MrCurious true
03:13 MrCurious i am forever stealing from tomorrow to pay today
03:14 MrCurious why cant i just go to bed at a reasonable time and do the early wake up thing
03:14 theBear meh, i thought you meant literally, but on reflection i do both at the moment
03:16 RifRaf heh i spend my life with earmuffs and glasses on now
03:16 theBear hehe, i was thinkin of you as i wrote it :)
03:27 MrCurious lets see if i can get ted talks on apple tv
03:49 RifRaf these were a bit tricker to print, but appears they will work http://imagebin.org/260644
03:51 MrCurious what are they
03:51 MrCurious couplers?
03:53 RifRaf yes for the Z motors,, stepper to threaded m5 rod
03:54 MrCurious thinking you will need to lock the lead screw to keep it from sliding
03:54 MrCurious as those couplers look like they may tug and push on the screw axis
03:54 RifRaf yes each has 2 holes for m3 bolt and captive nuts
03:54 MrCurious are you going to use that solvent to smooth them?
03:55 RifRaf yes i may dip them in the abs jiuce, have a good supply already from failed tests
03:55 RifRaf should get in any cracks and make em much better
03:57 RifRaf hrm wat to print next, am going a bit nuts but is good for tuning it
04:00 MrCurious looks like some of the axis's are sloppy a bit
04:00 MrCurious as the layers dont appear to align perfect
04:00 MrCurious but i may be being too picky
04:02 RifRaf i hard when the plastic has to go in thin air for most of the spiral, they are all individual spirals, no center support
04:03 RifRaf on the circles it lines up pretty well, good enough for me
04:05 MrCurious wonder, on the circles, how much out of align that is? like 1/2 or 1/4 a sheet of paper thickness
04:05 MrCurious or a sheet of bible paper thickness
04:06 RifRaf maybe 0.1mm if that
04:06 RifRaf the layers are 0.25mm for comparison
04:07 MrCurious then i would guess 0.05mm error
04:14 MrCurious did you get the red hot surface off ebay?
04:15 RifRaf no from a friend if Triffid_Hunters, but they are on ebat for less than $20
04:15 RifRaf then you need glass still and a frame to hold it, i bought the glass and made an aluminium frame to hold it
04:19 MrCurious is it just a copper clad pcb with some through holes?
04:20 RifRaf yep
04:20 RifRaf and a cool blue led
04:23 MrCurious the ebay one looked like it lacked the led
04:24 RifRaf on some you have to solder it yourself, and a resistor
04:24 MrCurious nice. chromebook ubuntu installed and patched for sound and suspend
05:06 Jak_o_Shadows tempted to try and make a clip on fume ventilation thing from a usb vacuum cleaner someone gave me
10:39 theBear is red gasket silicone 'food grade' when dried ? ie. ok to contact hot water several hundred degrees below it's recommended max operating temp and thoroughly dried/set ?
10:40 theBear also sigh, and don't even ask, i'll finish tomorrow
10:41 rue_house hmm whats bear making
10:42 theBear not making fixing, and i'll go as far as not making coffee for most of today and the start of tomorrow, and some generic excessive swearing like "balls !" and err "stupid plastic pipe fittings" and "metal is too damned hard"
10:42 theBear and it was just sposed to be a simple cap replacement and spring clean :(
10:43 rue_house sounds like a heat pump liquid cooling for a motherboard
10:44 theBear nah, i ain't gonna add stupid fittings and pipes and water and pumps to something that already works fine, bad enough dealing with them in stuff that needs them :(
10:44 theBear fine, i'll go a TINY bit further, but that's it... i couldn't imagine there were so many factors that could 'go wrong' during a repair of ANYTHING
10:45 rue_house I'v learned there are two types of wire-wrap-wire on ebay
10:45 rue_house "cheap" stuff, thats overall .5mm dia
10:45 eBear is a bit tired and grumpy at only having one real coffee today, out of a halfworking mach
10:45 rue_house and "good" stuff thats about .4mm dia
10:45 theBear hmm... i've learned there are two types of wire wrap wire
10:45 rue_house there was coffee before machines
10:46 theBear yeah, but some ass in a horse and cart left all my appropriate tools to make it 2 hours away from here :(
10:46 rue_house the cheap stuff is about $7/300m
10:46 theBear huh ? you pay that for a cup of coffee at a shop !?!?!
10:47 rue_house the good stuff is about $7/30m
10:47 rue_house anyhow, I have lots of colours of wire-wrap-wire now
10:47 theBear i suppose if i factor in several hours of drinking and smoking, and several hours of giving mum some manager-mentoring and yet another 6 months out of yer classic 3 year management college course, i didn't really spend all day not fixing something
10:48 theBear OOOOH ! i thought you mean millilitre, and coffee in a cup... damned coffee on my mind
10:48 theBear that and friday
10:48 rue_house cmon over here, its saturday
10:49 rue_house I have to head to the ebay office
10:49 theBear only for 25 minutes, i don't think i'll make it in time, and i don't think you got any booze
10:49 rue_house er, I mean the post office
10:49 theBear heh, i was thinking rue_bed :)
10:50 theBear and wtf is it with brass ? it shatters all over the stupid room when you try to use a sharp drillbit on it !
10:56 GuShH theBear: lol, brass is a brittle metal
10:56 GuShH I actually had a brass tube shatter on an end yesterday
10:56 theBear well, obviously, i spose
10:56 GuShH but it was weakened due to 50 years of being under water
10:57 GuShH the outside looked like regular copper
10:57 GuShH inside it was black
10:57 GuShH ended up using aluminum instea
10:57 GuShH d
11:01 theBear grrr, stupid fingers gonna be leaking metal for days
17:45 GargantuaSauce_ snaps acquired
17:45 GargantuaSauce_ they are going to be soooo much easier to mount than radial bearings
17:45 GargantuaSauce_ cant believe i didnt think of that
17:54 MrCurious nice, someone used the idea :D
17:56 GargantuaSauce_ well it was partially a matter of convenience
17:56 GargantuaSauce_ my mother is a costumer
17:56 GargantuaSauce_ and just so happened to have a few hundred in dozens of varieties
17:57 MrCurious lucky you, i had to go to a store
19:32 MrCurious https://www.youtube.com/watch?v=h2KYHLLIRYk