#robotics Logs

Nov 09 2013

02:56 rue_bed 0x0F+0b0001 -->> 16.000000
02:56 rue_bed heh, functionality I forgot it had
12:16 GuShh_ rue_house: went to the only place that carried the tap I needed
12:16 GuShh_ we tried it on the threaded piipe I've got... it's not a fit diameter wise
12:16 GuShh_ so yeah it must be a custom thread, no doubt at this point.
12:16 GuShh_ this is also why some people kept saying they've bought the 1/2 x 26tpi and their thread was "loose"
12:17 GuShh_ the original one is not conforming to the diameter specs
12:17 GuShh_ it's smaller
12:17 GuShh_ so I'll either turn a throw-away tap on the lathe (cut the slits on an angle grinder or similar, don't have a milling machine yet) or I'll buy that tap and live with it
12:17 Shh_ s
12:17 GuShh_ they don't have the matching die otherwise I would've got 'em
12:25 rue_house did you try a wootworth fit?
12:26 rue_house how about retapping it?
12:26 rue_house would a 3/8"NPT retap work?
12:30 Tom_itx you sure it's not some metric thread?
12:30 rue_house there is no metic match
12:31 Tom_itx it's where a set of thread gagues would come in handy
12:31 rue_house its .02mm/thread out
12:31 Tom_itx i've dealt with alot of custom threads
12:31 rue_house at this point its either wootworth or custom
12:31 Tom_itx my guess is custom
12:32 rue_house I dont understand why anyone would use a custom thread
12:32 Tom_itx proprietary parts they don't want ppl repurposing
12:32 rue_house GuShh_, what the heck is it anyhow?
12:33 rue_house speaking of thread size hell
12:33 rue_house I have one myself
12:33 rue_house I got a fuel line tap for my truck, from the local auto shop that looked things up carefully, when I got it, it was too big
12:33 rue_house http://www.ebay.ca/itm/Russell-670353-AN-Fuel-Pressure-Take-Off-Fitting-8-AN-Male-to-8-AN-Female-/231080394255
12:34 rue_house so I did my own research and worked out my fuel filter has an 'AN8" thread, waited 22 days, and got THE SAME DAMN ONE AS I BOUGHT LOCALLY
12:34 rue_house so I bought an AN6 which seems to be right
12:34 rue_house http://www.ebay.ca/itm/8-AN-Male-to-8-Female-1-8-Fuel-Pressure-Gauge-Port-Fitting-Black-Anodized-/181222587085
12:34 rue_house notice how the female nut end is smaller?
12:35 rue_house if I'm gonna relist the two that are too big, how the hell do I really know what size these ARE?
12:37 Tom_itx just tell them you're from china and they'll understand
12:38 rue_house hahah, that great, but there is a CANADA sticker beside my listings...
12:38 Tom_itx candada doesn't import things from china for sale?
12:38 rue_house I wan tot really for sure know what the size is
12:38 Tom_itx buy each tap or die and test the threads then
12:39 rue_house if you look up AN8 1/8 NPT on ebay, you see both sizes
12:39 Tom_itx or find a known bolt or nut
12:39 rue_house its fuel line thread...
12:39 rue_house good point where is a feaking spec
12:39 Tom_itx 1/8 npt on one end
12:39 Tom_itx for sure
12:39 rue_house http://en.wikipedia.org/wiki/AN_thread
12:39 Tom_itx and some straight ferule thread on the other
12:40 rue_house sae thread size, haha
12:40 Tom_itx it looks common enough
12:41 rue_house 14, 16 or 18tpi is my answer
12:42 e_house crawls out to his shop for a thread g
12:45 rue_shop2 _16_
12:45 Tom_itx 1/2 16?
12:46 rue_house 8 is the only one with 16tpi
14:07 MrCurious today i work on mounts for the final axis of cnc
14:08 MrCurious but first.... i kill dragons!
14:12 robotustra go to work, lazy boy
14:13 robotustra BB watching you
14:13 robotustra is watching
14:14 GuShh_ rue_house: it's for a supressor, for a pcp rifle
14:14 GuShh_ I got a couple neighbours peeking through and another one ask me what I was shooting with and what I was shooting
14:14 GuShh_ I live in the equivalent of a city block and I still got neighbour issues, fuck sake.
14:14 GuShh_ So yeah, supressing it is the only way... ignorant fools think it's a 22 rifle
14:15 GuShh_ It shoots and looks like one
14:15 GuShh_ doesn't sound like one though
14:20 rue_house well,
14:20 rue_house either get a 22 to show them the difference in sound,
14:21 rue_house or when they ask, give them a totally oversold description of the bb gun
14:21 rue_house -- calibur wilbur with polypropaline grip and... and ...
14:22 rue_house make it sound like your having an orgy talking about it
14:23 rue_house somewhere lunch is waiting for me
14:53 GuShh_ got the stanley "automatic" wire stripper (the 8" one) .. not bad for the price, certainly not the best out there... but from the cheapies, good enough. plus it's not for intensive use.
14:53 GuShh_ rue_house: it's not a bb gun, it will kill you and the muzzle velocity is the same of a 22, as is the caliber.
14:54 GuShh_ except most pellets I shoot are lower grain, for target practice (lower cost per shot)
14:54 rue_house oh
14:54 GuShh_ PCP are dangerous weapons, not toys.
14:54 GuShh_ they're for hunting small to medium game (look up sumatra pcp 22, 25 and bigger calibers)
14:54 rue_house GuShh_, isn't that the one that just rips the insulation off the end?
14:54 GuShh_ (I don't have a sumatra yet though)
14:54 GuShh_ it's not a rip, it actually cuts it
14:55 GuShh_ the tiny jaws have a tiny edge / blade
14:55 GuShh_ I thought it would rip it leaving an ugly finish but it's quite good
14:55 GuShh_ much better than the manual ones I've been using (those mostly rip it!)
14:55 GuShh_ let's see, it cuts on top and bottom and rips the remaining surfaces, but the finish is pretty good
14:56 GuShh_ it does almost the same thing I do with bigger wires by hand, I slit the insulation and bend it on the cut so it opens up (not ideal, but cheaper than buying the big ass strippers)
14:57 GuShh_ rue_house: http://www.youtube.com/embed/nq2jY1trxqg?rel=0
14:57 juniour hi people there
14:57 rue_house I'm here not there
14:57 GuShh_ he sounds like a redneck to me
14:57 GuShh_ billy? bobby? whats yo name son
14:58 juniour i just got interest in robotics. i am at zero level.
14:58 ace4016 excellent
14:58 rue_house haha the trick is to not stop
14:58 juniour i dont know any thing on robotics promming
14:58 GuShh_ lol this guy looks like rue! https://www.youtube.com/watch?v=tnzoF61hlRs
14:58 juniour but i need to strar help
14:58 GuShh_ the first one
14:58 juniour me guide me
14:58 ace4016 robotics programming is easy
14:59 ace4016 juniour, start here: http://www.seattlerobotics.org/
14:59 Shh_ r
14:59 juniour ace4016 i have bought respberry pi
14:59 ace4016 cool...
14:59 GuShh_ hahah
15:00 juniour ace4016 i am software programmer
15:00 ace4016 i don't do the low level to high level stuff well; finding a problem for a solution is somewhat of a foreign concept to me :P
15:01 ace4016 juniour, ever dealt with low level stuff? or have you only touched 3rd/4th generation languages and only dealt with desktop/web applications?
15:01 ace4016 do you know about concepts like registers, vectors, interrupts, and such?
15:01 ace4016 processor instructions
15:02 juniour ace4016 yep learned of little bit of assembly programming
15:03 GuShh_ sounds like an arduinian
15:03 juniour ace4016 but never applied in real life
15:03 juniour so needed a push
15:03 ace4016 you've got a head start at least
15:04 juniour ace4016 just gor respberry pi and installed some os and run that its
15:04 juniour so i came here for good guidence
15:04 ace4016 i've never touched the RPi, so no idea about specifics;
15:05 ace4016 i do remember that it has some GPIO on it though, so there should be a way to access the pins
15:05 juniour ace4016 i cant figure out from where to start. there are to many thing out there. so got confuse
15:05 ace4016 you can use them to get data in from various embedded systems and push data out to them as well
15:05 ace4016 well, could just start with a robot idea
15:06 ace4016 something simple, then just use the RPi as the central processor
15:06 ace4016 so that one component is already decided for you :P
15:07 juniour k
15:07 juniour whic programming language should i use. i am very good at python
15:07 juniour ??
15:07 ace4016 depends on what you have available to you
15:08 ace4016 if you have libraries and the like to interface with the communication ports in the langauge you enjoy, use that
15:08 ace4016 on a lesser MCU/CPU, you'd be restricted a bit more
15:09 ace4016 restricted down to probably C/C++, Forth (i think), and so on
15:09 juniour ace4016 wt you prefer me for language.
15:09 juniour ??
15:10 juniour which language should i use??
15:10 rue_house always use C or assembler on small microcontrollers
15:11 ace4016 RPi isn't a small MCU
15:12 ace4016 so python works; though yea, usually C would be the language to go
15:12 ace4016 with modern compilers, it's debateable whether you should ever concern yourself with ASM
15:12 ace4016 at the lowest, going a C+ASM route
15:20 juniour hummm
15:20 rue_house ome timing things call for it, but for the most part you can watch the compiler output and adjust the source if you have to
15:26 juniour thanks for discussion
15:26 juniour i liked i will be around with you guys
16:15 doomlord_ intrinsics in C can usually avoid the need for asm
17:10 GuShh_ doomlord_: LAWL
17:17 -hubbard.freenode.net:#robotics- [freenode-info] please register your nickname...don't forget to auto-identify! http://freenode.net/faq.shtml#nicksetup
18:37 MrCurious and now my favorite carpel tunnel inducing procedure.... tapping holes
18:37 MrCurious hehehehe i said tapping
18:38 MrCurious wish there was a machine to do this for me
18:38 MrCurious say in the $50 range
19:18 MrCurious and tapping done, x axis holders complete :)
19:24 rue_house I'v learned to use my hand drill
19:25 rue_house I usually grip the tap a bit loose so if it sticks' it'll just spin
19:25 rue_house and never go smaller than 6
22:29 MrCurious time to plan the next set of drill holes
22:30 Tom_itx what are you working on?
22:31 MrCurious CNC machine
22:31 MrCurious had insights, and dexign got un-blocked
22:31 Tom_itx pics or it never happened!
22:31 MrCurious now its moving forward quickly
22:31 MrCurious never happened
22:31 MrCurious :D
22:31 MrCurious pixx once more is done. taking them as i go
22:43 GuShh_ theBear: http://www.youtube.com/watch?v=zDCNJdeM9PE
22:46 GuShh_ MrCurious: so show them as you go!
22:48 MrCurious https://www.dropbox.com/s/qbdmow8edf9itud/2013-11-06%2020.10.22.jpg
22:48 MrCurious https://www.dropbox.com/s/fld6rwfh6bs9rhr/2013-11-06%2020.10.04.jpg
22:51 MrCurious now to drill more hole
22:52 Tom_itx how are you making sure the bars are parallel?
22:57 Tom_itx are you gonna drill thru the bottom or thread it for screws to secure the endcaps?
22:58 MrCurious measuring
22:58 MrCurious yeah, already tapped
22:58 MrCurious turnedout nice
22:58 MrCurious slides perfectly parallen
22:58 MrCurious had oine 0.1mm play per hole between the thread and the pillow blocks
22:59 Tom_itx lookin good so far
22:59 Tom_itx you should show more of the Y axis slide
23:00 Tom_itx actually that's probably X
23:00 MrCurious will do tomorrow
23:00 MrCurious tonight more in mood to work on sides
23:01 Shh_ is watching the a-
23:01 MrCurious when you get the manics... you run with the manic
23:14 gushh_phone meh
23:17 gushh_phone wonder where the bear is
23:17 theBear hooray ! i remember the first c+h video, i was so excited, now there's hundreds of them
23:18 theBear what's that ? yopu didn't know that all you have to do is say my name two times and i appear ?
23:18 GuShh_ boop
23:19 MrCurious biggie smalls
23:19 MrCurious biggie smalls
23:19 MrCurious biggie smalls
23:19 theBear now you've done it
23:20 theBear fwoo 35c eh
23:20 theBear and 10% !
23:22 GuShh_ woop dee doop
23:28 MrCurious 1.2mm off on that piece. will have to trim it to accurate after the fact and pretend it was perfecct first try
23:35 gushh_phone doesnt have to be perfect on the first attempt
23:35 MrCurious symetric pieces need to be well symetric
23:36 theBear if they sposed to be identical you cut them together, don't try and cut them the same, pfft, basic stuff
23:38 MrCurious they were identical sized
23:38 MrCurious then i drilled for the bearing blocks
23:38 MrCurious and got them slightly off
23:38 MrCurious had to use each bearing block as a drill guide as they may have variances