#robotics Logs

Jul 01 2012

#robotics Calendar


00:05 rue_shop maybe a bit to gorry, sorry
00:06 furrywolf ...
00:06 furrywolf bleh, my internet connection is back to suck mode tonight.
00:07 rue_shop this machine just hit 100% for over 5 mins trying to render a webpage
00:07 rue_shop I killed the process
00:07 furrywolf render the page, or execute javascript?
00:07 rue_shop a 2.4G machine
00:08 rue_shop Total of 1 processors activated (4784.67 BogoMIPS).
00:08 rue_shop odd
00:11 rue_shop my good machines been running to long to find the boot information
00:11 rue_shop 110 days :/
00:12 rue_shop I once rolled over an uptime counter
00:14 rue_shop so I figured out a force sensor
00:15 rue_shop I make a silicone sandwich between two pcb layers with a variable capacitor printed on them
00:16 rue_shop as the silicone sheers the distance between the pieces stays pretty close and the capacitance varies with the position offset
00:19 rue_shop mmm let that set up
00:41 rue_shop dear god I just found a whole box of vcr heads
00:44 e_shop folds his arms and sn
00:44 rue_shop I need a heat gun I can strip apart
01:00 rue_shop ooo I just cut myself good
01:01 e_shop tries to contain the b
01:37 rue_shop OOOOUCH...
01:37 rue_shop :(
01:37 rue_shop I know its damaged, lets turn the pain off now
01:38 ace4016 don't use super glue...
01:38 ace4016 that stuff is toxic
01:44 furrywolf welp, plumbing mostly sorted... wolfy bedtime
01:44 rrywolf curls up on katsmeow-afk for bed
01:45 rue_shop nerves seem to interpert about 9hz as pain
01:45 rue_shop + polarity
01:45 rue_shop I think I re-biased the nerves enough to leave me alone for a while
03:07 rue_mohr theBear,
03:07 rue_mohr cmon, wake UP
03:11 e_mohr slides the cat away from the edge of the
03:24 rue_mohr furrywolf, yup, thats pretty good for the time you put into it
03:24 rue_mohr how did you set up the segment fonts so fast?
03:27 rue_mohr huh
03:29 e_mohr tries to ignore the steady reminder from his thumb and finger of the damage thats been
03:35 rue_mohr http://www.turbosquid.com/3d-models/robot-arm-nachi-lwo/424059
03:35 rue_mohr hehe, got me for a min.
06:22 flatr0ze Hey. This's crazy.
06:22 flatr0ze sorry wrong channel
06:22 flatr0ze but it's still crazy
06:22 flatr0ze partying in NYC is DANGEROUS!
06:22 flatr0ze sorry
06:22 flatr0ze bye.. cya
10:00 rrywolf stretches out and y
10:02 katsmeow-afk yipes!
10:03 furrywolf ?
10:03 katsmeow-afk just wasn't expecting it
10:04 rrywolf curls back up on katsmeow-
10:05 tsmeow-afk is all wet sweaty alr
10:05 rrywolf just woke up, and too early for how late was up last night.
10:05 katsmeow-afk got the ac unit back in the wall where it belongs, and set up and running properly
10:05 katsmeow-afk the wall in the other room, unfortunately for here
10:21 furrywolf meh, need more ziplocks to sort more plumbing.
11:10 katsmeow-afk [10:58] <katsmeow-afk> Updated: 20 sec ago
11:10 katsmeow-afk [10:58] <katsmeow-afk> 101.3 °F
11:13 katsmeow-afk it's pretty warm today outside the bedroom with the ac reinstalled , but the thing is, this house managed to keep the temperature quite nice for 3 consecutive days of temperatures over 100F outside, and a week of temperatres over 90F before that
11:14 katsmeow-afk this is the first year with no one burning garbage where i could let the house intrinsically manage the temperature itself, altho without computer control
11:15 Tom_itx pipe your pc heat outside
11:15 Tom_itx or save it in a box for winter
11:16 katsmeow-afk today is the first i have turned on the ac, and i think if i had foreseen that poeple would stop brning garbage, and if i wrote the computer code to actively manage house temps, i *still* would not have the ac on, even being July first with record-setting temps
11:18 katsmeow-afk oh well
11:20 ace4016 heat index here is 106 but inside is delightfully cool...altohugh that might be because i just came from outsif
11:20 ace4016 outside*
11:21 katsmeow-afk i was talking actual temperatures, not heat indexes
11:22 katsmeow-afk i need to find some red paint, enough to make some 4ft tall chars on some roofing tin, garish enough the UPS idiots can see them
11:23 Tom_itx did you see my mill video?
11:23 Tom_itx it was just a dry test
11:23 katsmeow-afk no, you have a video?
11:24 Tom_itx i posted it yesterday
11:24 katsmeow-afk ummm, will yo be giving out theurl?
11:25 katsmeow-afk i dunno how i missed it
11:25 Tom_itx had to find it an this pc is slow
11:25 Tom_itx http://www.youtube.com/watch?v=XhU7S8kifJ4&feature=youtu.be
11:25 katsmeow-afk http://www.youtube.com/watch?v=XhU7S8kifJ4
11:25 Tom_itx nothing special
11:26 katsmeow-afk smoooooooooooooooth
11:28 Tom_itx oh, that's got the new plate on it too
11:28 Tom_itx compared to: http://tom-itx.dyndns.org:81/~webpage/boards/USBTiny_Mkii/Boxes/milling1.jpg
11:28 tsmeow-afk considers sending her psu faceplate to Tom for a couple new h
11:29 Tom_itx you can see the different steppers too
11:29 e_bed grumbles about how early it is and tries to get back to s
11:29 Tom_itx well not really
11:29 rue_bed stop texting so loud already
11:30 tsmeow-afk is afraid to look at the
11:30 furrywolf I really need to emc2ify my mill.
11:30 Tom_itx well, the mesa cards enable faster step rates
11:31 katsmeow-afk yea, you guys are really demo'ing how much i need to stop trying to make my drill press be a mill, and make a real mill
11:31 Tom_itx the gecko drives smooth out the steps and increase the power range
11:31 rue_bed gecko step to dc servo drivers
11:31 Tom_itx something like 40000 steps per rev
11:31 rue_bed and baldor servomotors
11:32 furrywolf I'll probably stick with steppers. my mill is way too small to need anything fancier.
11:32 Tom_itx i wish i could afford good servos
11:32 katsmeow-afk 40,000 steps/rev?
11:32 rue_bed microstepping
11:32 furrywolf katsmeow-afk: it's all in software
11:32 rue_bed kinda unreliable
11:32 Tom_itx furrywolf don't go smaller than 280
11:32 katsmeow-afk but 40,000 ?!
11:32 Tom_itx kat, yes
11:32 furrywolf my mill already has steppers on it, hence the sticking with them. :)
11:32 Tom_itx it uses a xylinx fpga
11:32 furrywolf dunno what their rating is.
11:33 rue_bed thats only 200 microsteps per step
11:33 Tom_itx 10
11:33 katsmeow-afk that's 111 steps *per degree* , 2 steps *per second* !!
11:33 rue_bed which is only 100 microsteps per half step
11:33 Tom_itx 10 per step
11:33 tsmeow-afk bog
11:33 Tom_itx on a 20 ipm leadscrew
11:33 rue_bed whats the native motor .9 or 1.8 degs per step?
11:34 rue_bed who the hell cut my finger and thumb up
11:34 katsmeow-afk well, can't argue with success
11:34 katsmeow-afk you're complainng about your finger being cut? i'll have you know there was no charge for that
11:34 atom1 # scale is 200 steps/rev * 20 revs/inch on the screw
11:34 atom1 # 10 uStep on the Gecko 203v added into the equasion.
11:35 atom1 SCALE = 40000
11:35 furrywolf http://fw.bushytails.net/mill02.jpg the steppers on my mill are that big. :)
11:35 Tom_itx i was wrong
11:36 Tom_itx that's 40000 per inch?
11:36 katsmeow-afk 0.000025
11:36 rue_bed +- chatter
11:37 Tom_itx taken out with comp
11:37 katsmeow-afk furry, how does that work?
11:37 Tom_itx oh also rue something for you... you can map your lead screws
11:37 rue_bed :)
11:37 rue_bed I know
11:37 katsmeow-afk yeas, measure with micrometer as you step the screw
11:37 rue_bed I have linear encoders on the new machine tho
11:38 Tom_itx still, it allows for uneven wear and linuxcnc will use that
11:38 Tom_itx i haven't figured out how to do it yet though
11:38 furrywolf katsmeow-afk: how does what work? (that is, are you asking how some part of it operates, or how well it performs?)
11:38 rue_bed the threaded rod I use tends to wiggle as it turns, which makes half the rotation cause a different offset than the other half
11:38 Tom_itx get a straight rod
11:38 katsmeow-afk how well it performs
11:38 rue_bed I did
11:39 Tom_itx i would like to get ballscrews
11:39 rue_bed there are still imperfections
11:39 furrywolf fine, but it's way, way too small. I have the version with only 3" of Y travel, which is really limiting.
11:39 katsmeow-afk i meant the small steppers
11:39 rue_bed I wonder what I WOULD do with a million dollars
11:39 furrywolf it's about $200 to get the parts from the 5" travel version. they also have a 7" version, but the parts don't fit.
11:39 furrywolf fine, as long as I keep the mill well-greased.
11:39 tsmeow-afk
11:40 tsmeow-afk wishes she had her pcb dri
11:40 rue_bed actually, these bandaids are bothering me more than the cuts
11:40 furrywolf I'm not making a nice deep cut with a half inch endmill in tool steel.... the mill is small enough it doesn't need that much torque, as you run into spindle torque, deflection, etc issues first.
11:40 tsmeow-afk
11:41 rue_bed I really want to get my dc servo machine going and see how it performs
11:41 furrywolf that said, when I emc2ify it, I'm going to up the stepper voltage a bit. I have to keep the rapids a bit slower than I'd like or they lose steps.
11:41 katsmeow-afk i built the pcb driller for 8x10 pcb, and ~1/2 inch vertical
11:41 furrywolf the motors run barely warm. I want them hot. :)
11:41 Tom_itx mine stay 'warm'
11:41 Tom_itx not hot
11:42 rue_bed not too hot or your cook the shelac off the windings
11:42 Tom_itx a feature of the driver
11:42 rue_bed if your driver is good, the heat will stay the same
11:42 rue_bed the drivers limit is the dv/dt when rapid stepping
11:42 Tom_itx it does pretty much
11:42 furrywolf I'd say during heavy use, they rise to maybe 10F (5C) over ambient. I think I can get a lot more out of them.
11:43 rue_bed without enough voltage, it cant bring the current up fast enough in the coils
11:43 Tom_itx they used to get uncomfortablly hot
11:43 Tom_itx but could still touch them
11:43 Tom_itx now they're just warm
11:43 rue_bed my old machine runs a 3V stepper on 12V ;)
11:43 Tom_itx with more current and voltage to them
11:43 Tom_itx mine run 3v steppers on 50v
11:43 rue_bed heatsink and fan on that one
11:43 rue_bed I have no current driver
11:44 Tom_itx work on that
11:44 rue_bed na
11:44 Tom_itx it makes a big difference
11:44 rue_bed its too slow
11:44 Tom_itx but you don't use yours that much do you?
11:44 rue_bed its too slow
11:44 rue_bed most things I can just do faster by hand
11:44 Tom_itx i like the accuracy and repeatability
11:45 rue_bed ouch, trying to take a deep breath indicates I may have a lung issue
11:45 rue_bed the new machine with the dc servos should be great
11:45 rue_bed I was looking at it last night while wrapping up
11:45 furrywolf I might swap in larger steppers on X and Y, and save those small ones for A and B.
11:46 rue_bed I was really shocked that even the motion conrol table at the faire was ALL steppers
11:46 rue_bed everyone was using steppers
11:46 Tom_itx commercial ones are cheaper
11:47 rue_bed oh I'm just waking up to all sorts of pain
11:47 Tom_itx did your mech step on you in your sleep?
11:48 rue_bed actually I can recall trying to get to sleep twice while dreaming, and both times I couldn't do it
11:48 rue_bed its like at some level, I dont know what its like to be asleep
11:49 rue_bed kat, I think I'm gonna recess flourescent light figures into the cieling of hte new house
11:49 rue_bed in patterns
11:52 e_bed wanted to play with furrys
11:52 rue_bed need to make overload boards for buddy too
11:53 rue_bed and I came up with ideas for another arm I want to play with
11:53 furrywolf which code?
11:54 rue_bed yesterdays
11:54 rue_bed I have a 15? segment display that I could use a font for
11:54 rue_bed it just has a segment driver on it, dosn't have an internal font
11:55 rue_bed couldn't find any driver datasheets with
11:55 rue_bed I wonder where my bearings are
11:55 furrywolf well, feel free to play with it. http://fw.bushytails.net/7seg/
11:55 Tom_itx on a slow boat from china
11:55 rue_bed ouch I cant take a deep breath
11:56 furrywolf all the font information is in the font file - the code is completely display-neutral.
11:56 rue_bed but they fly everything from china
11:56 rue_bed yea
11:56 Tom_itx no they put it in containers on a ship
11:56 rue_bed I noticed
11:56 rue_bed I suppose I should wait 3 mo
11:57 Tom_itx i've seen them come in both to corpus cristi and savannah
11:57 rue_bed I wanted to buy a heat gun for parts form the dollar store, I wonder if its open yet
11:57 Tom_itx it will be by the time you get up
11:57 Tom_itx or it may be closed again
11:57 rue_bed pff
11:57 rue_bed stupid non-24hr dollar stores
11:58 furrywolf my file format is quite simple, so if you wanted to extract the map information for your project, should be easy enough.
11:59 katsmeow-afk "recess" ? i was gonna do troughs of lites at the level of the bottoms of the open beams, shining up on ceiling, for indirect liting
11:59 rue_mohr I'm thinking suspended cieling
11:59 rue_mohr cause
11:59 katsmeow-afk lites in cans tend to get overheated for any flourescent
11:59 rue_mohr that really makes everything more workable
12:00 katsmeow-afk suspended works for changing the wiring every other day, but makes no diff in good lighting
12:00 rrywolf stretches, then reluctantly slips off of katsmeow-afk's lap, needing to go on errands rather than be a lapwolfy all
12:00 tsmeow-afk hands furry a carepackage m
12:00 katsmeow-afk morsel
12:01 e_mohr groans about it being waaay to e
12:02 furrywolf do I need true sine for running my circulation pumps?
12:02 katsmeow-afk i guess it depends on what sorta lighting you want, i don't like beamed lites from reflector bulbs in cans anywhere, and imho any can will overheat a mini-flourescent, and i have a strong dislike to maintenace issues around 2ft and 4ft tubes
12:02 rue_mohr furrywolf, are they capacitor start or run on just inductive?
12:02 furrywolf I think they have little run caps inside them somewhere.
12:02 katsmeow-afk a multistep "sine" would be ok, but i dunno about those squarewave sthings
12:02 rue_mohr the new electornic ballasts for 4' are good
12:03 rue_mohr furrywolf, is there a lump on the side for the cap?
12:03 rue_mohr if not, its just inductive
12:03 katsmeow-afk it's the 4ft itself i don't like, the struggling to chage lites when they need replacing
12:03 furrywolf I think there's one hidden in the wiring box. I haven't pulled them apart yet.
12:03 katsmeow-afk caps will not like the square wave, and the squarewave invertor won't like the caps
12:04 katsmeow-afk caps look like shorts to fast risetimes
12:05 furrywolf and inductors look like opens at first, and when in series with a cap, I have no clue what you get. :)
12:05 rue_mohr iirc square wave works great on pure inductive mtoors
12:05 katsmeow-afk i think it's so wierd that there arren't more true sine convertors available, beacuse the "modified sine" circuits basically are the same if they have any voltage servo-control circuit in them
12:05 rue_mohr furrywolf, inductor+cap mostly becomes resistance
12:06 furrywolf sec, I'll go look at one.
12:06 katsmeow-afk that average to a reistance if the signal is a sine, but not if it's a waveform that exagerates the characteristics of the inductance or the cap
12:06 rue_mohr must be 16 segment
12:07 katsmeow-afk nukebox says lunch is ready
12:08 katsmeow-afk it's too hot out to go in the sun and finish that outside portion of ac install
12:08 furrywolf can't get the wiring covers off, but the dataplate says 10uf on it, so I'd wager there's a cap in there. :)
12:08 rue_mohr square wave sends most of the impedences to hell
12:08 rue_mohr haha
12:08 rue_mohr one of the cats is practising using the ladder to get up on the bed
12:09 katsmeow-afk i'll wager your invertor goes into current limit on every "modifies sine" waveform edge
12:09 furrywolf the previous owner mounted the differential temperature controllers straight to the motor, in such a fashion that it's a big project to get to the wiring.
12:09 rue_mohr its got a rung spacing of about 20" which is too much even for me
12:09 furrywolf http://www.drillspot.com/products/73532/Grundfos_UP15-18-SU__115V_Circulator_Pump those
12:10 e_mohr declares he should fix
12:10 rue_mohr see the round lump?
12:10 rue_mohr its a cap
12:10 katsmeow-afk $226 ? damn
12:10 katsmeow-afk someone had a set of those real cheap on ebay a couple weeks ago
12:11 rue_mohr I pay ~$100
12:11 furrywolf that Taco one you pasted sold for over $100 if I remember right.
12:11 furrywolf rue_mohr: yes. I know this. :P
12:11 furrywolf I can't take the wiring cover off on mine, so didn't know what was in it.
12:11 katsmeow-afk then why isn't rue selling us these things?
12:13 furrywolf the question is... do they need true sine? if they do, I'm going to need another inverter... I want to be able to run them independently of the main inverter.
12:13 rue_mohr shipping from canada sucks
12:13 rue_mohr they need sine
12:13 rue_mohr they have a run cap
12:13 rue_mohr you can prolly get them to turn on modified, but they will not be happy
12:13 furrywolf bleh, sine is expensive.
12:13 rue_mohr sorry, I thought you were asking
12:14 katsmeow-afk sine shoul dnot be expensive is the issue
12:14 furrywolf all the other motors I've used off modified sine were only capacitor start, not capacitor run...
12:14 rue_mohr pull out the cap and make a 2 phase modified inverter with a 90 degree offset secondary output
12:14 furrywolf although I did learn one thing: shaded pole motors do not run on modified sine.
12:14 rue_mohr its a run cap, beleive me
12:14 furrywolf yeah, I'm figuring it is.
12:14 katsmeow-afk sine being expensive is aggravating for me since i can't get ups/usps pickup out here because of gods, i i cannot sell sine even if i made them
12:14 rue_mohr I have a schematic for one of those
12:15 furrywolf how many chinese inverter watts do you figure it takes to run one?
12:15 katsmeow-afk 2x motor rateing at least
12:16 katsmeow-afk it may not pull 2x all the time, but it will during startup
12:16 furrywolf (chinese inverter watts being different than real inverter watts.... for example, my 600W chinese true-sine inverter absolutely will not start my refrigerator, while my 600W US-made one starts it effortlessly...)
12:16 katsmeow-afk fridges are cap starts, they suck a lot of power to get moving
12:17 katsmeow-afk or they *cat* like cap starts
12:17 katsmeow-afk act
12:17 katsmeow-afk i need foods
12:17 katsmeow-afk it's cooked already afk to eat it
12:17 furrywolf this is a tiny little danfoss compressor, draws a whole 48W or something like that... after it starts. heh.
12:19 furrywolf bbl here too, off on errands.
12:54 katsmeow-afk good thing i made the drip pan, because it's what's carrying the a/c water outside now
12:57 Tom_itx it's not sloped to the back to run outside?
12:58 katsmeow-afk what?
12:58 Tom_itx the ac
12:58 tsmeow-afk didn't understand the question in the context of what she
12:58 Tom_itx window ac?
12:59 katsmeow-afk yeas, teh ac is pitched down tot he outside, hence : good thing i made the drip pan, because it's what's carrying the a/c water outside now
12:59 Tom_itx i misunderstood
12:59 katsmeow-afk but the pan of the ac unit itself is poolr made for carrying water, it has lots of holes in it
13:00 katsmeow-afk and oddly, no hole int he fan plenum (but it does now) and tiney hole int he evaporator pan
13:00 katsmeow-afk there was over 2 inches could be collected int he fan plenum, zero drain there
13:00 katsmeow-afk and it was alsway sloshing water
13:01 Tom_itx not used to splash on the fins to help cool?
13:01 tsmeow-afk sighs at her spelling la
13:01 katsmeow-afk no, because that water trapped in the plenum was bhind the evaporator, not the condensor
13:02 katsmeow-afk and the oem pan of the unit is so full of holes , any diy water cooling would only be putting water intot he walls of the house
13:02 rue_mohr ok
13:02 rue_mohr breakfast, then move some wood than take over the world
13:02 rue_mohr its a big day, but I can stay up as late as I want
13:03 katsmeow-afk i'd prefer a chiller / chilled water system, but the circulation pumps cost so much
13:03 rue_mohr http://www.turbosquid.com/3d-models/robot-arm-nachi-lwo/424059
13:03 rue_mohr I mistook that for a real arm for a bit
13:03 rue_mohr wondered why the paint job was so bad
13:03 rue_mohr all the pics you see of them online are repainted
13:04 katsmeow-afk even tho it says "3D model" ?
13:04 rue_mohr I was starring ath the image, not the surrounding bit
13:05 rue_mohr you know, if I make LARGER hinge pins, they dont ahve to be continious, they can be discrete
13:06 rue_mohr yo prolly only need about 6 points on an 8" hingepin
13:07 katsmeow-afk i would make them continuous, else the pieces can get cocked and you get uneven wear and slop real fast, and maybe binding
13:07 rue_mohr for a small robot, a 3" hingepin might only need between 3 and 5 points
13:07 rue_mohr which way cocked?
13:08 katsmeow-afk hold a bar loosely in your fists, push one fist forwards
13:09 rue_mohr if both fists are fixed position everything will be ok
13:09 katsmeow-afk yep
13:09 katsmeow-afk there's a reason high load joints are not discontinuous
13:09 rue_mohr :) its no good as a single point bearing
13:09 rue_mohr you need a set
13:10 katsmeow-afk you need more than a set
13:10 rue_mohr hmm
13:10 rue_mohr maybe I should povray this thing I'm thinking
13:10 katsmeow-afk keeping the pins on axis is very difficult with any significant load
13:11 rue_mohr http://www.ebay.ca/itm/4pcs-51103-Axial-Ball-Thrust-Bearing-17mm-x-30mm-x-9mm-/221057508881?pt=LH_DefaultDomain_0&hash=item33780de611
13:11 rue_mohr ooo
13:12 katsmeow-afk those look nice
13:13 katsmeow-afk 4 for $1 ? great price
13:13 rue_mohr yea
13:13 rue_mohr their small, but I think thats still a good price
13:13 katsmeow-afk it's in china, you are aware those races could be plastic, yeas?
13:13 rue_mohr :) you mean it might not be like the pic?
13:14 katsmeow-afk oh, it may loks exactly like the pics, and be plastic
13:14 Tom_itx rue are you gonna get that industrial arm?
13:14 rue_mohr its a rendering
13:14 rue_mohr I may make it
13:15 rue_mohr rememerb when I welded tabs to the big ball bearings I had?
13:15 rue_mohr well I just realizd that I could make an arm like that if I put those on their side
13:16 rue_mohr hahah
13:16 rue_mohr my fingers are trying to finish typing things for me and its a mess
13:16 katsmeow-afk can i put 1.8v (500Mhz) ddr2 into the same socket as 2.5v (100Mhz) ddr2 ?
13:17 rue_mohr no, the notch is located differently
13:17 rue_mohr *slightly* over iirc
13:17 katsmeow-afk the key in the memory is different, but must it be difefrent in the socket?
13:17 katsmeow-afk yeas
13:17 katsmeow-afk drat
13:17 katsmeow-afk but the pins line up the same
13:18 katsmeow-afk so if i wanna, and remember what i am doing, take notes, etc i can remove the keys and do what i want?
13:18 katsmeow-afk the area of the key on the module is pretty wide
13:19 katsmeow-afk for a completly homemade non-computer system, if all i have is 100Mhz sockets, and all i have are 500Mhz modules, re-keying sounds logical, no?
13:19 tsmeow-afk warms up the dr
13:23 rue_mohr they may need a higher refresh rate
13:23 e_mohr starts up a chai
13:24 rue_mohr ok, how to make a bearing
13:24 rue_mohr a) define a unit as an inch
13:24 rue_mohr b) make a cylinder thats 3" dia (od) by 1.5" long
13:25 rue_mohr centered at 0,0,0
13:25 rue_mohr witha chrome texture
13:25 Tom_itx i've seen bearing blanks from lathes at the surplus tool guy's place
13:25 katsmeow-afk hmm
13:25 rue_mohr with its length along the...
13:25 rue_mohr whcih way is up
13:25 rue_mohr y
13:25 rue_mohr so along the z axis
13:25 katsmeow-afk i was gonna run the ram slower, but then it will be in refresh more % of time, i spose
13:26 e_mohr sh
13:26 rue_mohr oh I have to difference it with a cylinder of the id
13:26 rue_mohr hmm
13:27 rue_mohr 2.8" maybe
13:27 Tom_itx they aren't chromed but polished very smooth
13:28 rue_mohr Parse Error: Degenerate cylinder, base point = apex point.
13:28 rue_mohr fffffffffffff
13:29 katsmeow-afk goto a truck/car repair shop, ask for their tranny/rearend teardown bearings , there's pairs of bearings, and often they'll replace all bearings when one goes bad, that's 20+ lbs of large bearings in a big gearbox
13:30 rue_mohr hmm what dia?
13:30 rue_mohr I know exactly the shop to ask too
13:30 katsmeow-afk depends on the vehicle , 2" , 3" , 4"
13:31 katsmeow-afk ask tranny rebuild specialist shops, they'll have a set of bearings to toss out every day in good times
13:31 katsmeow-afk i go put my paws up, ladder time is hard on me
13:58 rue_mohr ok kat
13:58 rue_mohr this is my thought
13:58 rue_mohr !assist tutorials/mech/bearing.png
13:58 tobbor Possibly http://eds.dyndns.org/~ircjunk/tutorials/mech/bearing.png
13:58 rue_mohr the red bits are nylon
13:58 rue_mohr the blue bit is the body of the arm
14:54 rue_shop furrywolf, I need to write a program to make me a table of fraction to decimal equivs
15:09 furrywolf should be easy.
15:09 rrywolf is back, with s
15:17 Tom_itx rue_shop get a nice poster for your shop with them
15:17 Tom_itx i have 3 or 4 hanging around
15:20 furrywolf yay, my program compiled and worked the first time. :)
15:21 rrywolf loves when programs do t
15:23 furrywolf http://fw.bushytails.net/7seg/fracts.c.txt
15:48 rue_shop furrywolf, what you making now?
15:49 rue_shop hahaha
15:49 rue_shop I had time to go out and get some metal rods and a glue gun
15:49 rue_shop thanks furrywolf
15:51 furrywolf of course, I'm sure you could find tables online... :P
15:51 furrywolf mine will generate them for odd steps, though. (60ths, etc)
16:03 rue_shop bah, stupid plating puts the rod almost a thou over in some spots
16:06 rue_shop katsmeow-afk, ?
16:08 katsmeow-afk hmm?
16:10 rue_shop I have to weld a small pipe perpendicular across a second pipe
16:10 rue_shop how would you set this up
16:10 rue_shop +
16:10 furrywolf two more chunks of the other pipe to get it level.
16:10 furrywolf or are they both loose, so it doesn't need to be lined up?
16:11 furrywolf then just use a square.
16:11 furrywolf use a square, tack it, measure diagonals, adjust, burn it in.
16:11 katsmeow-afk it's gonna warp
16:13 katsmeow-afk take all the zinc off, then get some unzinc'd nails or unzinked scrap rod ~1/4 the size of the smallest pipe
16:13 katsmeow-afk use the nails or rod as filler, lay in the joint and weld from one pipe right thru the filler to the next pipe
16:14 rue_shop mmm
16:14 katsmeow-afk you can't get a rod into the >< where the pipes meet anyhow
16:14 katsmeow-afk and if you don't want the joint to warp, you'll need a jig to hold the pipes firmly while you weld them
16:15 katsmeow-afk flat table, assorted plywood or plate steel scraps, C-visegrips
16:16 katsmeow-afk any zinc in the melt pool will make the bead grey, brittle, crystaline inside, and gassy
16:17 furrywolf and give you the sniffles the next day.
16:17 katsmeow-afk try to set up the filler so your melt pool doesn't instatly flow away, the unmelted filler should help hold it
16:18 katsmeow-afk the unmelted nails/rod will snap off easily
16:18 rue_shop one of the pipes is only the width of the second pipe long
16:18 katsmeow-afk ok
16:18 rue_shop but, on what you just said, I'm playing with a peice of U channel I made to straddle one peice
16:18 katsmeow-afk k
16:21 tsmeow-afk goes to make some rice for dinner late
16:24 rue_shop haha this is so small and light duty a tack weld is almost overkill
16:25 furrywolf jbweld. :P
16:28 katsmeow-afk i thought you were wlding up truck axles
16:28 katsmeow-afk radio being interrupted for severe storm warnings here
16:29 katsmeow-afk 60mph winds, flash flooding, hail
16:29 katsmeow-afk basically what the east coast of usa got yesterday(?)
16:30 katsmeow-afk holycows, weather is busy out there : http://www.intellicast.com/National/Radar/Summary.aspx?location=default&region=CSG
16:31 katsmeow-afk http://www.intellicast.com/National/Radar/Summary.aspx?location=USNC0121
16:39 rue_mohr !assist images/p1040191.jpg
16:40 tobbor Possibly http://eds.dyndns.org/~ircjunk/images/p1040191.jpg
16:40 rue_mohr its 3/4" pipe, the small pipe fits a 3/8" hingepin, and there is a 1/4" "set screw" on the back
16:40 rue_mohr so I can slide it over 1/2" EMT as an adjustable hinge
16:41 rue_mohr hard to weld with all that zink burning off
16:41 Tom_itx don't breath it
16:41 rue_mohr no
16:41 Tom_itx maybe that's why you hurt this morning
16:41 rue_mohr no
16:41 katsmeow-afk remove it before burning it
16:41 rue_mohr yea yea
16:41 Tom_itx it's such a pretty yellow though
16:42 katsmeow-afk i'd rather have rue around at least as long as i last, vs seeing yellow zinc on pipes
16:43 Tom_itx you would?
16:44 Tom_itx meh, i suppose so
16:45 katsmeow-afk well, i thought about it, and yea, my vote is for rue instead of zinc
16:45 Tom_itx zinc has so many uses though
16:45 katsmeow-afk rue too
16:45 katsmeow-afk and, rue is interactive
16:45 katsmeow-afk and mobile
16:46 m_itx feeling unwanted, le
16:46 katsmeow-afk huh?
16:46 Tom_itx oh wait... i wasn't the one sniffing zinc
16:46 katsmeow-afk no one said anything that you were unwanted
16:46 katsmeow-afk yea, rue left, he was voting for the zinc
16:47 Tom_itx i work good alone anyway
16:47 katsmeow-afk dinner beeped, afk
16:54 katsmeow-afk dinner is getting a good re-nuking
16:54 katsmeow-afk i seldom pike my rice al dente
16:55 katsmeow-afk pike/like
16:55 Tom_itx rue_mohr
16:56 Tom_itx look at the arm in the 4th video here:
16:56 Tom_L http://www.youtube.com/watch?v=5w2FWelvPs8&feature=autoplay&list=PL7E1F2259CB2137D8&playnext=1
16:56 Tom_itx also note that's the first avr sample ever
16:57 Tom_itx and the video camera watching the spoon
16:57 katsmeow-afk a cherrios flinger? don'tthey know they can make a bigger mess if they add milk or coffee to the cherrios ?
16:58 katsmeow-afk "you you idiot robot, put the spoon into the patient's mouth, not their eye"
16:59 rue_shop tee hee hee
16:59 rue_shop coffee to cherios, huh
17:00 Tom_itx i have no sound
17:00 Tom_itx i should find sound and replay it
17:00 rue_shop one of these days I'm gonna mix up the safety gear between the grinder and the welder
17:00 Tom_itx they kinda work the same
17:00 Tom_itx if you have a good welding helmet you can use it for both
17:00 Tom_itx until the grinder sparks
17:01 Tom_itx then you will go blind
17:01 Tom_itx because the shading will come on
17:01 katsmeow-afk yeas, you don't want the grinder sandblasting the eye protection away
17:02 Tom_itx i wonder if Dean's video is in this series
17:02 Tom_itx they made him do one
17:03 katsmeow-afk "no, i said i want this meal al dente, not al Dante"
17:04 Tom_itx all dented?
17:04 katsmeow-afk "why are the koi hiding under the bridge?" "i thought that was self evident"
17:05 katsmeow-afk "al dente" means, literally" to the tooth", firm
17:05 katsmeow-afk koi/coy
17:05 rue_shop oh god, I feel sorry for those servos
17:06 katsmeow-afk being pulled on ?
17:07 Tom_itx i see they have a toy truck too
17:07 katsmeow-afk i think there's faster ways to eat cherrios than trying to anthropormorphise the ordeal
17:08 rue_shop "open your eye and say AAAAAAAAAAAAAAAAaaAAAAAAAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHH"
17:08 katsmeow-afk that thing can't cut a steak, i think they are lumbering down the wrong fork in the road
17:09 Tom_itx maybe they don't trust it with a knife just yet
17:09 katsmeow-afk imagine if car makers decided to emulate horses, our cars would have 4 legs
17:09 katsmeow-afk some things are just a bad idea
17:12 katsmeow-afk imagine that fixed frame of thinking for drinking, they'd have the robot spill coffee cup all over the human, instead of using a straw?
17:12 katsmeow-afk who needs 500 of 74HC 8-bit shift register?
17:13 rue_shop 8c-what?
17:13 rue_shop 595?
17:13 katsmeow-afk at 50ns per shift, you'd need 400ns to shift all 8 bits with it
17:13 katsmeow-afk umm,, 168 ?
17:14 katsmeow-afk yeas, 74HC168M
17:14 katsmeow-afk at 5-6v, max serial out is 1.2Mhz?
17:15 katsmeow-afk rue can do that with a octal latch in no time at all
17:15 Tom_itx kat could too
17:15 katsmeow-afk but $10 + s&h, 500 ,, if you need them, there they are
17:16 Tom_itx i need the $10 more right now
17:16 katsmeow-afk i'd use a 74F374 and clock them out at 100Mhz ;-)
17:17 katsmeow-afk you tristate the 374, clock in the data, tritate that driver and untristate the 374, and feed clock pulses and it shifts out
17:18 katsmeow-afk all the storms are nowhere around me, but that may be a good thing
17:18 Tom_itx the tired is catching me
17:18 katsmeow-afk banish it to whence it came?
17:19 rue_shop the sun came out, I'm awake
17:19 katsmeow-afk what is the math relationship of the 2nd and 3rd pistons in a triple expansion steam engine?
17:29 rue_shop how do I get out of a pool without leaving a hole in it?
17:30 rue_shop maybe I should make the foot pedal
17:33 rue_shop kat, is it fixed?
17:37 katsmeow-afk what?
17:38 katsmeow-afk was it broke?
17:46 rue_shop they want a silly amount of money for the pedal, so I'm gonna make one
17:46 rue_shop about the hole left in the pool when I pull away?
17:59 rue_shop if I burn the index finger and thumb of these gloves anymore they aren't gonna fit a babys hands
17:59 e_shop tries to stretch it back
18:00 rue_shop I hate it when *just as* your finger is starting to catch fire, and you have to pull away, the arc breaks and the pool dosn't quite bridge and you have to start again
18:03 rue_shop I had a new one too
18:03 rue_shop just as the pool as about to bridge, a cinder fell in my hair just above my ear,
18:03 rue_shop aparently, for a minute second, the pool was more important
18:04 rue_shop not sure where it landed, I heard sizzeling
18:05 orlok Nrgh
18:05 orlok Bought a (second) dash from ebay to replace fuel guage in car
18:05 orlok this one has a minute difference to the other, so i had to swap the whole dash, not the fuel guage
18:05 orlok new dash has a non-functioning speedo
18:06 orlok speedo unit is tack welded in :-\
18:06 orlok ahh well, at least the fuel guage works.
18:06 orlok one of them, the guage has a 3 pin plug as part of the assemble, and grounds to the chassis via a copper spring
18:07 orlok the new one has the ground tab as part of the chassis, and only 2 pins on the fuel guage assembly
18:07 orlok tiny tiny difference, not noticable until you actually take the fucking thing out
18:08 orlok ahh well. made up a new set of multimeter probes
18:10 rue_shop V is a good size for making hinge holes for 3/8" pin
18:10 rue_shop orlok, chevvy?
18:11 orlok GMH
18:11 rue_shop GMC?
18:11 orlok Holden
18:11 rue_shop orlok, !!!
18:11 rue_shop dude!
18:11 rue_shop can you get me something from the local hardware store?
18:11 rue_shop I need an 18mm spade drill
18:12 orlok http://www.airlec.com.au/p-1328-18mm-spade-drill.aspx?
18:12 rue_shop is GMH equiv to GMC?
18:12 rue_shop YES! thats what I need!
18:13 rue_shop I also need 23.5mm, but thats not available in spade
18:13 rue_shop and I dont want to pay $24+ for one bit
18:13 orlok Close enough.. they are rebranded as each other
18:14 rue_shop ok
18:14 rue_shop here is whats wrong
18:14 rue_shop there is a shunt regulator
18:14 rue_shop the cap is shorted and the series resistor is blown open
18:14 rue_shop its not even a regulator, its an overvoltage protection circuit
18:15 rue_shop if you can get to it, you can fix it, easy
18:15 rue_shop I did mine and the one in the replacement cluster I got
18:15 orlok yeah, i checked the resistance of the series resistor and noticed they were different
18:16 orlok one was under 200Omh, the other one wwas in the 200K range
18:16 rue_shop from what I can tel it should be 200 ohms
18:16 rue_shop er 10 ohms
18:16 rue_shop it was hard to tell, all the stripes were burned off
18:16 rue_shop but its been good for months
18:16 orlok ahh, these are just brown tubes
18:17 rue_shop after changing the cap and resistor
18:17 rue_shop I cant find the images
18:17 rue_shop so, you think I should buy direct or will you get one and ship 'er to me?
18:18 orlok i'd love to get one and ship it to you, but i dont know if my local hardware shop sells them
18:18 orlok and i have so little spare time its not funny :-(
18:19 orlok its taken me months to just be able to try and swap that fual guage
18:19 rue_shop maybe knowing a store is good enough
18:19 rue_shop theBear,
18:19 rue_shop theBear, WAKE UPPP
18:24 rue_shop ok I can paint it wait for the paint to dry, or asseble now
18:24 rue_shop nowonder none of my projects end up getting painted
18:26 Tom_itx i wonder how much charge you need to get powder coat to stick to a surface for baking
18:26 rue_shop 2k would prolly be enough
18:27 e_shop throws paint at the peices and starts working out what the next peices needed
18:28 rue_shop erp, blood, where is that from....
18:30 rue_mohr yup, that was the smell of a burning pot
18:31 rue_mohr wonder when I started lunch
18:34 rue_shop ace4016, you in the usa or australlia right now?
18:35 ace4016 US
18:37 rue_shop when you gonna be in australlia again?
18:38 ace4016 i've never been to Oz
18:39 katsmeow-afk yea, and i bet orlok never been to usa, right?
18:39 rue_shop what!?
18:39 ace4016 :P
18:39 rue_shop you were over there working on the bank servers just a few years ago
18:42 ace4016 nyet
18:42 rue_shop maybe I'm thinking of the other ace4016
18:42 ace4016 i'm an EE; i play with electronics and stuff (atm, airplanes)
18:42 rue_shop well if your switching profesions than fine!
18:42 ace4016 lol
18:43 e4016 bomps rue_shop on the
18:46 rue_shop !?!
18:46 rue_shop why is all the square stock tubing I have *just* the wrong size
18:47 rue_shop I suppose it dosn't help I want to fit it inot the other square tubing thats the same size
18:48 e_shop thinks about this pro
18:48 e_shop sniffs the air and tries to work out what that familiar burning smel
18:48 Tom_itx resize the project to fit
19:00 rue_shop grrr, I'm gonna run out of 1/4" nuts
19:12 rue_shop I dont think this "204" rod is the same as 6011
19:13 rue_shop the slag is all wrong
19:54 Riplok Hello room. I have an interest in learning robotics and I'm looking for a book to start with. Any suggestions for a good book to start with ?
19:54 ace4016 holy crap rue_shop, http://www.robothut.robotnut.com/ToborTheGreat.html
19:55 ace4016 Tobor with one b instead of two
19:55 ace4016 derp....tobor|robot
19:56 ace4016 Riplok, there's a project book that escapes my memory i'm trying to find
19:57 ace4016 there are more websites about this than books it seems -_-
19:58 Riplok ace4016: Cool thank you very much :)
19:59 Riplok That will work as well. Is there any with labs or videos?
19:59 Riplok I need help mostly with the electronics.
20:01 Riplok Hardware and software, I have a pretty good handle one. But I have never messed with custom electronics.
20:02 ace4016 you could google beginner robotics projects and a ton of them will come up
20:02 ace4016 with pictures and projects for you to do; sometimes videos...though i question the effectiveness of videos
20:03 Riplok Are they on target, I know some web sites are not laid out very well.
20:04 ace4016 depends on the website; some are much more organized than others; you won't find everything on one website iether
20:05 Riplok Ok cool :) I will work on putting together a collection of sites then. Thanks for all the advice :)
20:44 rue_shop are there always an even number of ends in the universe?
20:45 Tom_itx no
20:45 Tom_itx there is always at least one loose end to tie up
20:46 Tom_itx Dec 22 2012 the last one will be tied :)
20:46 Tom_itx then what will we do?
20:47 ace4016 dance the night away
21:02 rue_shop damnit, it happened again
21:02 rue_shop a plan to make a small robot ended up with a giant one
21:02 e_shop looks up at what he built, folds his arms and gr
21:12 Tom_itx rue_shop
21:12 Tom_itx you should make another rue rule
21:12 Tom_itx if it won't fit in a box at the end of the day you can't make it
21:16 rue_shop hahah
21:17 e_shop better find some damn big b
21:17 rue_shop I like the way this turned out
21:17 rue_shop this really worked
21:17 rue_shop maybe this planning thing isn't such a waste of time
21:25 rue_shop I suppose this is arm...
21:25 rue_shop 6
21:44 e_shop wonders how his stock of lead is d
21:46 Tom_itx pay shipping and i'll send you some
21:48 rue_shop its ok, I think I have a few lbs in the 'didn't recharge' pile
21:53 Tom_itx i got a bunch from some machines that had been leaded in when they were moved
21:56 rue_shop base swivels are an annoying problem
21:57 rue_shop oh wait
21:57 rue_shop I was given a pile of old motors
22:06 e_shop put down the remains of the motor he just destr
22:06 rue_shop mmm no, I want something witha hollow shaft
22:12 rue_shop needs a shoulder to work
22:14 rue_shop maybe I could do a plastic plate...
22:14 rue_shop if I snadwich..
22:20 rue_shop if I make the problem worse it becomes easier to solve
22:21 rue_shop the larger I make the pipe that is used for the rotation king pin
22:21 rue_shop the solution changes
22:21 rue_shop it becomes a ring with bearings on the base
22:21 rue_shop so how small can I make that solution
22:22 rue_shop hmm
22:22 rue_shop a wheel?
22:22 m_itx gives rue_shop a crane platform with a large ring gear and m
22:23 e_shop signals 'hold on, I have an i
22:26 e_shop climbs out of the box of wheels with a discouraged look on his
22:26 e_shop gets an idea and jumps into the box of pul
22:27 Tom_itx rue_shop
22:27 Tom_itx rocker recliner swivel base
22:27 e_shop jumps out of the box of *gears* and jumps into the box of pul
22:28 Tom_itx bar stool swivel
22:29 e_shop jumps out of the
22:29 rue_shop they cant take side sheer tom
22:30 rue_shop where did all my big stuff go?
22:30 rue_shop oh!
22:30 Tom_itx i'm not sure of the app
22:30 e_shop goes for the base
22:30 Tom_itx wasn't following the whole story
22:33 e_shop comes back with 2 12" washing machine pul
22:33 rue_shop so the arm is about...
22:34 rue_shop its got a 4' reach
22:34 rue_shop need a base swivel for it
22:34 rue_shop with a hollow pin
22:34 rue_shop I'm low on skateboard bearings too
22:35 Tom_itx ok, the sun is down and my lights are going out now
22:35 Tom_itx got most of my docs updated on my wiring
22:35 rue_shop I have a disk on an alternator I could support with 9 skateboard bearings
22:36 rue_shop but I dont have 9 left
22:37 rue_shop hmm
22:37 e_shop goes down to the road and sets up a tripwire, waits for a skateboarder to come a
22:38 rue_shop if I made this robot half the size it'd still be a fine robot
22:38 Tom_itx would you finish in half the time as well?
22:38 rue_shop no
22:38 rue_shop it dosn't matter if I finish
22:38 Tom_itx it does matter
22:39 rue_shop no, I'v alrady come up with solutions to probelms that I will carry with me forever
22:39 rue_shop this is pretty awesome this one
22:39 rue_shop remember the little stepper arm?
22:39 m_itx
22:39 rue_shop imagine that with a 4' reach
22:40 Tom_itx yeah, it may destroy your shop
22:40 rue_shop pff, stuff happens
22:40 Tom_itx or lop off your head
22:40 rue_shop I been thinking of metal hand extensions, so I can work with hotstuff freely
22:41 Tom_itx just a couple things to button up and i think this box is done
23:44 buhman anyone know of some sort of extremely cheaply priced but fairly useful "robot" chassis?
23:44 buhman something like in the range of $10?
23:45 rue_mohr wheeled?
23:45 rue_mohr tracked?
23:45 rue_mohr what size?
23:46 rue_mohr 8"x12"?
23:46 rue_mohr 4'x4'?
23:46 rue_mohr or an arm
23:46 rue_mohr ?
23:46 buhman erm probably wheeled
23:46 buhman mobile chassis (forgot to specify)
23:46 rue_mohr how big?
23:46 rue_mohr for what kinda terrain?
23:46 rue_mohr how much abttery life?
23:47 rue_mohr with or without speel correction?
23:47 rue_mohr !assist robots/arm6/
23:47 tobbor Possibly http://eds.dyndns.org/~ircjunk/robots/arm6/
23:47 buhman terrain: tiled university hallways (perfectly flat/smooth)
23:47 buhman battery life: infinite
23:47 rue_mohr http://eds.dyndns.org/~ircjunk/robots/arm6/p1040197.jpg
23:47 rue_mohr tom, what do you think?
23:48 rue_mohr buhman, battery life is gonna be a problem
23:48 buhman and possibly like closed-loop-feedback/servo motors
23:48 rue_mohr ok, what kinda drive/motion style tracked? unimotion? vector?
23:49 orlok buhman: nylon chopping board, and hardware store brackets
23:49 buhman rue_mohr: don't really care as far as that goes
23:50 orlok buhman: also, scavenge inkjets
23:50 buhman orlok: O.o what?
23:50 buhman I'm not creative enough to know what to do with a nylon chopping board :P
23:51 orlok buhman: any "robot chassis" you get that cheap is either going to be a toy from a second hand shop, or a singe laser cut sheet of perspex
23:51 orlok bolt stuff to it!
23:52 orlok any idea what sort of robot? 2 wheels is probably easiest
23:55 buhman I would imagine so
23:57 rue_mohr oh , we were talking, sorry
23:57 rue_mohr how big?
23:57 rue_mohr inches by inches base
23:57 buhman doesn't really matter
23:58 buhman I guess I should properly introduce the plan/idea
23:58 rue_mohr buhman, how about 24" by 36" vector drive
23:58 buhman example?
23:58 rue_mohr http://eds.dyndns.org/~ircjunk/robots/mowerbot2/p1000878.jpg
23:59 rue_mohr buhman, you in universiry?
23:59 buhman yes
23:59 rue_mohr http://eds.dyndns.org/~ircjunk/robots/arm6/p1040195.jpg
23:59 buhman but that's much too large
23:59 rue_mohr buhman, then I'll give you a special price
23:59 buhman lol
23:59 rue_mohr well tell me how big isn't too large
23:59 rue_mohr http://eds.dyndns.org/~ircjunk/robots/arm6/p1040195.jpg <-- katsmeow-afk , tom?