#garfield Logs
Apr 01 2018
#garfield Calendar
08:59 PM katsmeow: <coff>
09:02 PM katsmeow is now known as katsmeow-afk
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09:39 PM rue_mohr: hey
09:39 PM rue_mohr: I cant get a screen working
09:40 PM rue_mohr: but its because its a SH1106 instead of a ssd1306
09:40 PM Tom_L: space station fell
09:40 PM rue_mohr: heh
09:40 PM rue_mohr: gravity finally kicked in?
09:41 PM Tom_L: china's
09:41 PM katsmeow-afk: i forget whey they didn;t botehr savingit,do you rememer?
09:41 PM Tom_L: lost control
09:41 PM Tom_L: https://www.radionz.co.nz/news/world/353881/space-lab-to-fall-to-earth-within-hours
09:42 PM rue_mohr: mhm
09:42 PM rue_mohr: it happened today eh?
09:42 PM Tom_L: apparently
09:42 PM rue_mohr: mhm
09:42 PM katsmeow-afk: but they couldhave strapped on control units?
09:43 PM Tom_L: likely didn't care
09:45 PM katsmeow-afk: pricey not-carring
09:45 PM katsmeow-afk: cold have sold it to Space-x
09:45 PM rue_mohr: its not a good day to say "Hey! look up! your about to get hit in the head with a space station!"
09:46 PM katsmeow-afk: yea,, try making that claim for damages
09:46 PM Tom_L: only one person recorded has ever been hit
09:46 PM Tom_L: and they were from Oklahoma
09:48 PM Tom_L: too bad it couldn't have been guided to Kim Jong-un's house
09:49 PM katsmeow-afk: or the white house,, i was thinking that since the usa has bombed Chinese foreign state buldings 2x since ww2, (Kosevo was the last, iirc), dropping it on the white house would have been spectacular
09:51 PM Tom_L: so when are they gonna say: "April Fools"?
09:54 PM rue_mohr: I suspect we will see tommorow
09:56 PM rue_mohr: kat, I need force actuator ideas, for force feedback suit
09:56 PM katsmeow-afk: oh
09:56 PM * katsmeow-afk looks at Tom
09:56 PM katsmeow-afk is now known as katsmeow
09:56 PM rue_mohr: so far, I'v looked at twisted line, pneumatics, and a line-spool drive
09:56 PM rue_mohr: I'v considered hobby servos,
09:57 PM rue_mohr: force feedback against a human is a bit trickey, they can kick good
09:58 PM rue_mohr: I'm thinking starting with just arms might be ok
09:58 PM rue_mohr: if I just had the upper body made for the mecha I'd be ok
09:58 PM katsmeow: you going to wear it then?
09:58 PM rue_mohr: no, remote feedback suit
09:59 PM katsmeow: the mecha willw ear the remote feedback suit? that's wierd, why?
09:59 PM rue_mohr: heh
09:59 PM rue_mohr: see, with the mecha, I was abel to make it 12' to deal with the actuator size
09:59 PM rue_mohr: but I cant do that on the feedback suit
09:59 PM rue_mohr: it needs to be a reasonable size
09:59 PM rue_mohr: and weight
10:00 PM katsmeow: plastics
10:01 PM katsmeow: i thinkthe only way you can get the correct force AND distance feedback, is math in a avr and a servo onthe suit, like you said
10:01 PM rue_mohr: dont need to get fancy, one side sends position, the other side sends force
10:01 PM rue_mohr: and it all just works out
10:02 PM rue_mohr: I'v done some tests
10:02 PM rue_mohr: its awesome
10:02 PM katsmeow: so you canpostion one arm and tellhow hard you are crushing an insulator with the other arm?
10:02 PM katsmeow: i think i'd want to know both bitsof data on both arns
10:03 PM rue_mohr: it works, it a fedback loop
10:03 PM rue_mohr: you can test it easy
10:03 PM rue_mohr: make two barely geared motors with pots for position sensing
10:04 PM rue_mohr: set one up as a position servo, use the other to set the position
10:04 PM rue_mohr: make sure the servo action works
10:04 PM rue_mohr: then, rewire the two motors in series
10:04 PM katsmeow: hat's position, what about force?
10:04 PM rue_mohr: thats your force fedback
10:04 PM rue_mohr: I1 = I2
10:04 PM rue_mohr: it works
10:04 PM rue_mohr: you can move either side and the other side moces
10:04 PM katsmeow: k
10:04 PM rue_mohr: and you can feel each side
10:05 PM rue_mohr: totally bidirectional
10:06 PM katsmeow: ok, i didn;t figure it woldbe reliab;le due to mechaical glitches,, what about wire size, and the number of wired run into your suit?
10:06 PM rue_mohr: thats where you insert digital link
10:06 PM katsmeow: a pair of 14 awg per degree of freedom?
10:06 PM rue_mohr: my demo on that has had challanges with a digital current regulator
10:07 PM katsmeow: o, so there are servoes in the suit
10:07 PM rue_mohr: yes, strong enough for *some* scale of force feedback
10:09 PM rue_mohr: :/ I didn'y youtube the force feedback demo
10:09 PM katsmeow: how can you be sure it happened then ?
10:10 PM rue_mohr: still ont eh shelf
10:10 PM rue_mohr: haha you cant youtube for force feedback cause are you get are results for race car game steering sheels
10:11 PM Tom_L: https://www.youtube.com/watch?v=mx2P_YR9YNA
10:12 PM Tom_L: https://www.youtube.com/watch?v=6eiX2DJhwQE
10:12 PM rue_mohr: is that the disney one?
10:12 PM rue_mohr: no
10:12 PM Tom_L: first 2 hits
10:13 PM katsmeow: and someone hits it with a hammer and breaks his wrist?
10:13 PM Tom_L: i'll let rue try it on first
10:14 PM rue_mohr: yea, you need to make sure the feeddback max isn't insane
10:14 PM Tom_L: https://www.youtube.com/watch?v=qDtojXGPWD4
10:14 PM Tom_L: or that it can't go past center like near the knee or elbow?
10:15 PM katsmeow: for sure
10:15 PM katsmeow: neck too
10:16 PM katsmeow: humand don;t perform well if everything normally n front is placed in back
10:17 PM rue_mohr: https://www.youtube.com/watch?v=TPW5OKoc7dQ
10:19 PM rue_mohr: arg, work tommroow
10:19 PM Tom_L: i barely trust my own actions, let alone if i told something else to duplicate them
10:20 PM Tom_L: possibly getting another cnc control card free
10:20 PM Tom_L: this one is ethernet
10:21 PM Tom_L: he stepped on it and broke an ear off one of the connector release levers
10:23 PM rue_mohr: zhanx is doing cnc control cards now?
10:24 PM katsmeow: how to tell "oriental" hands from "soviet bloc" hands on youtube : in soviet bloc, steel is rusty and fingernails dirty
10:29 PM Tom_L: rue, not that i'm aware of
10:29 PM rue_mohr: oh, I just assumed when you said he stepped on it and broke it...
10:30 PM Tom_L: http://store.mesanet.com/index.php?route=product/product&product_id=61&search=7i80
10:31 PM katsmeow: tobefair, he has stepped on things and brokenthem
10:31 PM Tom_L: so have i
10:31 PM rue_mohr: ....lots of things...
10:31 PM Tom_L: just one of the 50 pin connector ears is all but he can't sell it
10:32 PM rue_mohr: why is a SH1106 display $8, but a SSD1306 display, $2? and why do you get an sh1106 when you try to buy a ssd1306?
10:32 PM Tom_L: he tests alot of cards and distributes them
10:32 PM rue_mohr: and some of them he steps on
10:32 PM Tom_L: we'll see if he follows thru with what he said
10:33 PM Tom_L: it's a good card though
10:33 PM rue_mohr: I'm sure if he cant send you the one he stepped on, he'll step on another one for you
10:33 PM rue_mohr: (sorry, this is too much fun)
10:34 PM Tom_L: the first card i ever got didn't have those release tabs anyway
10:35 PM Tom_L: i've got one with pcie interface
10:36 PM katsmeow: i've got years ofprojects backed up
10:37 PM Tom_L: i've dismissed quite a few
10:39 PM katsmeow: some need doing, i need water tankage, and my washing machine unbroken, and a toilet i donl;t need to empty every day would be nice
10:39 PM katsmeow: the top floor being useable more than 2 months each year wouldbe real nice too
10:55 PM rue_shop3: yes, I have to catch up with projects quick
10:55 PM rue_shop3: I didn't do a good job this year
10:55 PM rue_shop3: er, this weekend
10:55 PM rue_shop3: I have the table set up for the pipe bender
10:56 PM rue_shop3: need to build the rest of the table and beef up the tack welds on the steelwork
10:56 PM rue_shop3: then try to bend some pipe
10:56 PM rue_shop3: I need 8' 8.5' and 9' rings iirc
10:57 PM rue_shop3: I have notes somewhere
10:57 PM rue_shop3: two sets of gyro rings
10:57 PM katsmeow: need to make the brake electric drive, else when i bring it inside and clamp it to a table, i'll just be picking up tables wheni use it
10:57 PM katsmeow: if it's 12vdc, i can just press a button
11:00 PM katsmeow: Tom got a wierfeed welder?
11:00 PM rue_shop3: the screw sorter is comming along
11:00 PM rue_shop3: I have one of the kids comming by on the weekend working on it
11:01 PM rue_shop3: did that work?
11:01 PM katsmeow: you weighing the screws, and doing video-optical length measuring while it;s weighing?
11:01 PM katsmeow: did what work?
11:02 PM rue_shop3: http://ruemohr.org/~ircjunk/images/pi/IMG31Mar2018_013624.jpg
11:02 PM rue_shop3: hmm that wasn't today
11:02 PM rue_shop3: http://ruemohr.org/~ircjunk/images/pi/IMG02Apr2018_040004.jpg
11:02 PM rue_shop3: bingo
11:02 PM rue_shop3: 28 bins
11:02 PM rue_shop3: (small ones)
11:03 PM rue_shop3: http://ruemohr.org/~ircjunk/images/pi/IMG02Apr2018_040154.jpg
11:04 PM rue_shop3: http://ruemohr.org/~ircjunk/images/pi/IMG02Apr2018_040250.jpg
11:04 PM rue_shop3: sorry, no viewfinder
11:04 PM katsmeow: idunno how it works, or why you have a 2nd lathe crammed into a slot against the wall
11:05 PM rue_shop3: theres only 1 lathe...
11:05 PM katsmeow: it's a lightweight 3-jaw , it;s not theone you use in the iddle of the shop
11:06 PM katsmeow: if that is your only lathe, why is it somewhere you cannot use it??
11:06 PM rue_shop3: http://ruemohr.org/~ircjunk/projects/lathe/p1040779.jpg
11:07 PM rue_shop3: its accessable, the 2d-ism of the image is just tricking you
11:08 PM katsmeow: http://ruemohr.org/~ircjunk/images/pi/IMG02Apr2018_040154.jpg looks 3-jaw , but http://ruemohr.org/~ircjunk/projects/lathe/p1040779.jpg looks 4 jaw
11:08 PM rue_shop3: I should make effort to finish the parts washer this summer tooo
11:08 PM rue_shop3: it came with both
11:08 PM katsmeow: o
11:09 PM * katsmeow hands rue some steel tomake cross bracing tween the legs of that thing, and shelves, drawers for tools
11:09 PM rue_shop3: I put a peice of plywood into the back as a brace and vibration damper
11:09 PM rue_shop3: the garbage can lives under there now
11:10 PM rue_shop3: and the scrap metal tub
11:10 PM rue_shop3: and the lathe parts
11:10 PM katsmeow: o
11:10 PM rue_shop3: did that work?
11:11 PM katsmeow: yeas
11:11 PM rue_shop3: hmmm
11:11 PM * katsmeow needs hydraulics or electic drive to lift the table on the drill press too
11:12 PM katsmeow: i bolted it o the wall, so it stopped falling over wheni clamp long stuff inthe vise
11:12 PM rue_shop3: cant get the angle right
11:12 PM katsmeow: needs a collection of shelf and drawers areound it for bits and other trinkets that are used to adorn it
11:12 PM rue_shop3: kinda
11:13 PM rue_shop3: most of the bits live under the drillpress
11:13 PM rue_shop3: the short metal ends bits
11:13 PM * katsmeow nods
11:14 PM katsmeow: i been thinking of replacing the funcation of the single post with two posts, sturdyingit up a great deal side to side
11:14 PM rue_shop3: anyhow, I hope to have the screw sorter going soon
11:14 PM rue_shop3: the lathe?
11:15 PM katsmeow: i coulda sworn the AGM-86B was already nuke-rated
11:15 PM rue_shop3: more than anything it should be bolted down
11:15 PM katsmeow: imeant my tall drill press
11:15 PM katsmeow: theone ibent the spindle to 45 degrees on
11:15 PM rue_shop3: oh
11:16 PM katsmeow: if i hadthe tools, i'd just make a better spindle, beefier, and straight
11:16 PM rue_shop3: did that work?
11:16 PM katsmeow: it's stupid that spindle is necked down to 3/8 dia, with a pin thru it, and have a huge chuck with 1/2 inch capacity
11:16 PM rue_shop3: http://ruemohr.org/~ircjunk/images/pi/IMG02Apr2018_041505.jpg
11:16 PM rue_shop3: that I beam is for the new cnc
11:17 PM katsmeow: i straightened the old spindle, it runs as well as it ever did
11:17 PM rue_shop3: i recall.
11:17 PM katsmeow: new cnc what?
11:17 PM rue_shop3: mill
11:17 PM rue_shop3: you notice the one borrowed from army of evil robots?
11:18 PM katsmeow: no
11:18 PM rue_shop3: http://ruemohr.org/~ircjunk/images/pi/IMG02Apr2018_040154.jpg
11:18 PM rue_shop3: over the "damnit these pipes are too short for " rod holder array
11:18 PM katsmeow: oh,, that's a mill, i thought mislabled 3D printer box
11:19 PM rue_shop3: nup, its a converted sherline
11:19 PM rue_shop3: https://blog.armyofevilrobots.com/
11:19 PM rue_shop3: its his
11:19 PM katsmeow: welp, check the new I beam for straighness where you want it straight
11:20 PM rue_shop3: I dont
11:20 PM rue_shop3: thats the awesome part
11:20 PM rue_shop3: if I had a large rock I'd be ok
11:20 PM rue_shop3: I just use it as a ridgid frame, and attach everything onto it in the orientation I want
11:20 PM katsmeow: a large rockmay be useable, but you can do it better if the base etc isn;t all cattywompus
11:21 PM katsmeow: wtf is a krampus ?
11:21 PM katsmeow: and why?
11:22 PM rue_shop3: I dont know
11:25 PM rue_shop3: ok, my productivity dropped to 0 at some point
11:26 PM rue_shop3: I want to do things, but can see that nothings happening
11:28 PM katsmeow: been there, doing that
11:30 PM katsmeow: i stillhave the parts, the acid, the peroxide, from 10+ yrs ago, when i ceased having a pcb driller
11:30 PM katsmeow: i see them every day
11:31 PM rue_mohr: you got me thinking about a reverse driller agian
11:32 PM rue_mohr: do a lser dot on top and bring the drill up from the bottom
11:32 PM katsmeow: toplug holes?
11:32 PM katsmeow: oh, i said that a few days ago
11:32 PM rue_mohr: yea
11:32 PM rue_mohr: it was something mentioned quite a few years back too
11:32 PM katsmeow: might reduce the dust alot, and you will know the bit isn;t going to hit any hold-downs
11:32 PM rue_mohr: but I also got that software going and would like to put it into action