#robotics Logs

Mar 18 2014

00:38 rue_mohr2 I wonder how long my split bushing will work
00:59 rue_mohr2 I'm out of canned ravioli
00:59 rue_mohr2 damnit
01:08 rue_mohr2 did YOU eat all the ravioli?
01:08 rue_mohr2 hell no
01:08 rue_mohr2 well I didn't eat it
01:09 rue_mohr2 another one for the pixies?
06:02 Jak_o_Shadows I have no freaking clue where I have put those salvaged stepper motors
06:07 Jak_o_Shadows There we go. I had left the gearboxes on them, so they weren't in the same place.
14:20 GuShH_ Hmmm I think cats have pride.. dogs as well come to think of it
14:21 GuShH_ We adopted a kitten left from the litter of one of our cats, he's old enough to hunt now... he actually caught his first bird today, what did he do? he began to ran around the house displaying the catch, showing it to his mom, to us, everyone! and kept going with pride!
14:22 SlaveToTheSauce smug fucker
14:24 GuShH_ yeah, tiny little bird too.
14:38 GuShH_ SlaveToTheSauce: cats are no different from reprappers, they both show off mundane accomplishments.
14:38 ShH_
14:39 SlaveToTheSauce lul
14:39 SlaveToTheSauce how many birds have YOU caught with your bare hands?
14:39 GuShH_ Never tried
14:39 GuShH_ and they've got paws.
14:39 GuShH_ I don't!
14:40 GuShH_ But being human, we can use tools. namely a rifle or a shotgun
14:40 GuShH_ you would need your bare hands to use one
15:54 GuShH_ rue_mohr2: for the shafts on the edm I thought i could drill all the plates at the same time, to have them more or less aligned.
16:14 GargantuaSauce measure once, cut twice
16:19 GuShH_ GargantuaSauce: I think it's the other way around sir
16:21 GargantuaSauce lies
18:05 GuShH_ almost 1 year of use on the chinese drill press, it already has 5mm slop on the quill, if I push it from one end to the other, measured with a dial indicator on a straight rod by the jaw chucks.
18:05 GuShH_ what a joke
18:05 GuShH_ it's not the bearings, it's the actual quill, no bushing there just steel on iron
18:06 GuShH_ if I had a knee mill I would consider the idea of milling a slot for a bushing, but there's not much space in there for anything really.
18:06 GuShH_ milling, more like boring.
18:24 Tom_itx GuShH_ you are boring again
18:55 GuShH_ Tom_itx: that's how I roll!
18:55 GuShH_ adjusting backlash on crossfeed
18:55 GuShH_ it was 10 thousands off, now it's about 1.2 or so... I don't think I can get it any better
18:56 GuShH_ without it starting to bind
18:56 GuShH_ not sure how the hell the adjustment will stay in place, no locking mechanism on either screw
18:56 GuShH_ one is a grub screw possibly m4 or m5, the other is a big phillips head screw
18:57 GuShH_ which allow to tilt the nut
18:58 GuShH_ sure does feel a lot better now, but it won't stay like that for long
18:58 ShH_ has some problems with the gib screws also, they s
18:59 GuShH_ what's the backlash on your lathe's crossfeed?
18:59 GuShH_ any tips
19:00 GuShH_ I found the leadscrew of my compound is slightly off center.
19:00 GuShH_ ie. bent, which is why it was slightly binding on one portion of the turn
19:00 GuShH_ how the hell did they manage to bend it?
19:00 GuShH_ I would need to cut a keyway if I wanted to make a new one... so until I have the mill and the right cutters, no joy
19:01 GuShH_ should I try to source some brass stock to make new gibs?
19:03 GuShH_ there's no dowel on any of the gibs...
19:03 GuShH_ surface finish is yucky.
19:03 GuShH_ I don't even think they're flat
19:04 GuShH_ but the more material I remove, the worse it'll get.
19:04 GuShH_ (since it's allowed to "slop" more, given there are no dowels)
19:05 GuShH_ should I even try to source bronze?
19:06 Tom_itx what would you do with it if you did?
19:06 GuShH_ new gib stripes
19:06 GuShH_ if the stock is of similar dimensions I can bring it down on a flat surface using sand paper
19:06 GuShH_ quit rubbing the fact that I don't have a mill in my face :(
19:06 rue_mohr2 brass gibs?
19:06 GuShH_ bronze
19:07 GuShH_ these are steel
19:07 rue_mohr2 iv only ever seen steel
19:07 GuShH_ really nice old lathes were bronze
19:07 Tom_itx you've never seen good equipment then
19:07 rue_mohr2 we have a thing called cintered bronze now ya know
19:07 GuShH_ and the gibs are almost push fit when new
19:08 rue_mohr2 sops up lube nice
19:08 GuShH_ yes I've seen it used in bushings
19:08 Tom_itx hard to machine
19:08 Tom_itx near impossible since it's porous
19:08 GuShH_ but the idea of the bronze is that most alloys are self lubing
19:08 Tom_itx without ruining it
19:08 GuShH_ so I would like to use bronze instead of steel, if I do make new gibs
19:09 GuShH_ I'm already replacing all the screws with allen grub screws and nicer nuts
19:09 rue_mohr2 but honestly I cant count the motors that I'v seenthe bronze collar wear thru the steel shaft
19:09 rue_mohr2 wow, I just slept for oever 5 hour
19:09 GuShH_ these have deep scratches and I suspect aren't flat either
19:10 Tom_itx feel any better?
19:10 GuShH_ if I polish them I'll be worse than I started with, I think
19:10 Tom_itx rue_mohr2 you need someone around to make you soup
19:10 GuShH_ no
19:10 GuShH_ he needs a soup robot
19:10 GuShH_ clearly.
19:11 GuShH_ soupy I
19:11 GuShH_ I already designed it in my mind, there's a cage up top where you keep the chickens.
19:11 GuShH_ oxy torch will get rid of the feathers.
19:12 GuShH_ and most of the chicken, but you only need a little bit for a good soup.
19:30 rue_mohr2 Tom_itx, sounds like there is 5 other people at work who have become ill
19:32 GargantuaSauce way to go, patient zero
19:40 rue_mohr2 I was thinking how stupid it was
19:40 rue_mohr2 while at the medical clinic
19:40 rue_mohr2 waiting in the waiting room
19:41 rue_mohr2 all the seats are tight up against each other
19:41 rue_mohr2 you have one room for god knows how many people to wait for 2 HOURS in, unisolated, not even air starilizers, before you take them to even see what they have
19:44 rue_mohr2 same deal at hospital, 2 hours wait for emergency
19:44 rue_mohr2 even if your on a bed just rolled in by the ambulance
20:37 GuShH_ rue_mohr2: hospitals are a nice way to spread desease
20:37 GuShH_ as are old folk homes :)
20:39 GuShH_ which demands the following: https://www.youtube.com/watch?v=2KQ_KUsNjXI
20:43 GuShH_ rue_mohr2: I get about 5 thou of play on the toolpost when I rock it back and forth with my weight, I think it's due to the way the center post is constructed, it's just an M10 pinned to the block
20:43 GuShH_ not the gibs, I already adjusted all of them using the dial indicator while rocking the slides
20:44 GuShH_ at worst I get 1.5 thou with a lot of pushing force
20:50 rue_mohr2 I havn't been abel to pinpoint and play in the toolpost or top sliders of mine, leaving me scratching my head where any chatter comes from
20:52 GuShH_ rue_mohr2: I only get chatter from steel cutting, and it's mostly the 2 screw mount to blame, rif changed it for a plate of steel with 4 mounts and solved most of it, it's a known issue. But there's play up top too
20:53 GuShH_ then of course it gets multiplied by the flexing of the tool and the way it's held
20:54 GuShH_ the way I see chatter in this case... the tool grabs, flexes down as it performs a deep cut, this makes it tilt down even more, until it snaps back up, repeats. when it snaps up it can burnish the surface and make it harder to bite, so when it does bite it's a deep bite when you force it in.
20:55 GuShH_ but I'm sure there are other mechanics involved in the process
20:55 GuShH_ I've seen tool flex when cutting steel, it's visible with the carbide brazed tools I've got, even if they aren't sticking out much.
20:56 GuShH_ a proper quick change toolpost would solve part of my problem, but it requires modification of the compound.
21:01 rue_mohr2 its too bad you need so many damn expensive adapters for those quickchange posts
21:05 GuShH_ rue_mohr2: if you have a big ass milling machine and a source of big ass steel, you can make your own
21:05 GuShH_ assuming you have the right cutters
21:05 GuShH_ mostly endmills, dovetail
21:06 GuShH_ you could make 3 or 4 at a time, then part them and face them
21:06 GuShH_ don't know why they're so expensive, cheapies are actually made out of ALUMINUM
21:06 GuShH_ if they were using a high quality steel I'd get it, but I'm not sure they are on the bigger ones
21:06 GuShH_ aloris for instance, is it plain mild steel or some fancy ass tool steel?
21:06 GuShH_ there's a company here that makes similar ones
21:07 GuShH_ they cost more than chinese made ones
21:07 GuShH_ I asked why and they pretty much gave me the finger.
21:07 GuShH_ it seems local made stuff is always more expensive
21:07 GuShH_ the quality looks ok, but at half of what I paid for the lathe, there's no way I'm buying one of those toolposts.
21:08 GuShH_ I guess iron could be used, but I don't know where to buy big chunks of it
21:09 GuShH_ another thought was to use smaller square stock (biggest I could source), chamfer the edges and weld them together, then mill them flat... but I'm not sure if that's a sane idea
21:10 GuShH_ I am certain the cost of the endmills and other cutters required plus the materials is less than a complete toolpost
22:26 GuShH_ lmao, woman dies after injecting her own boobies with vaseline... 30 days in the hospital, died today.
22:26 GuShH_ This month's Darwin award goes to... slippy titties!
22:27 GuShH_ If you want 'em bigger, seek a surgeon you dumb ass.
22:28 GuShH_ contacted the mach3 guys about pirated licenses being sold...
22:28 GuShH_ they basically said they are a small company and they can't afford to go through the legal route against these sites and individuals...
22:28 GuShH_ makes me sick.
22:30 Fiesta yeah makes you wonder about the world, when our rule of law seems to be only optimized towards the rich and powerful.
22:30 Fiesta perhaps if you're not rich and powerful, it's best to bypass/ignore the law.
22:31 Fiesta (ie: don't bother with patents/licenses)
22:31 Fiesta or just the bare minimum to protect yourself a little, if you wanted.
22:33 Fiesta Can you heat treat 3D printed parts to make them as strong as injection molded parts?
22:34 Fiesta to homogenise all the fusion areas, and relax the weird strains you get from extrusion.
22:34 GuShH_ doubtful
22:34 GuShH_ might as well do your own injection molding :p
22:35 GuShH_ you _could_ in theory
22:36 Fiesta i know this is something you can do with metal, but i don't understand how plastic works.
22:36 GuShH_ the mach3 guy told me it's much worse in China than in all of my region, regarding pirating
22:36 GuShH_ but in China it seems to be harder to catch the assholes if not impossible
22:37 GuShH_ they could at least keep changing their license code and release new versions all the time, but anyone with an old stable release will be happy enough I guess
22:37 Fiesta I worry the plastic might be inclined to just melt into a blob. Even if you reduce the pull of gravity by doing it suspended in a neutral buoyancy liquid, surface tension might still pull fine features together and the result may end up looking like an acetone vapour treatment.
22:37 Fiesta but i dunno
22:38 GuShH_ it's OK for prototyping, but that's all
22:38 GuShH_ for real parts you need other methods
22:38 GuShH_ If I were to build a reprap I would try to make as many parts out of aluminum as I could
22:38 GuShH_ can't be bothered with plastic.
22:38 GuShH_ sure that's not the point of it, but it was never able to "reproduce" itself anyway, just seed itself.
22:39 Fiesta why can't it be done?
22:39 Fiesta heat treatment i mean
22:39 GuShH_ rue_mohr2: you gotta see these chatter patterns I got on some thin aluminum without the follow steady
22:39 GuShH_ I just don't think those brass fingers are suitable for aluminum...
22:39 GuShH_ they're beautiful!
22:40 Fiesta chatter patterns?
22:40 Fiesta got an image?
22:41 rue_mohr2 did i miss an url?
22:43 GuShH_ I'll upload a vid
22:45 GuShH_ bah stupid 1080p vids take a while to upload
23:01 GuShH_ http://youtu.be/k_fZchWNZeE -- this is 3mm wall 10mm OD 6063-T6 tubing, very long, taking over half of the lathe bed. held between centers, no follow steady since mine has brass fingers that would dig in the aluminum, I need to make roller bearing fingers... cut wasn't very deep, but it was producing these interesting chatter patterns. Anyway, need to figure out how to steady it or increase my rod diameter to it's nominal 10mm
23:01 GuShH_ , but I don't have 10mm reamers for the bushings.. hence, trying to bring it down to 8mm (which I do have reamers for).
23:01 GuShH_ squeaky sound is the motor centrifugal switch, I need to sort that out or swap it for a 3 phase finally.
23:02 Fiesta pretty
23:03 GuShH_ but without a follow steady how am I going to bring this down to 8mm, it's going to get even worse the lower I go... I might have to change plans
23:04 GuShH_ rue_mohr2: there's the URL for ya
23:04 GuShH_ and that's a sharp hss cutter I'm using... it's just too bendy.
23:04 rue_mohr2 hmm
23:05 GuShH_ I tried the steady once on aluminum, it dug in badly. you can't use brass with aluminum without that happening eventually
23:05 GuShH_ I've seen a mod where they drilled and tapped tiny shafts for tiny bearings on the original fingers, but I don't want to do that.
23:05 rue_mohr2 I been thinking about making grinding hardware
23:05 GuShH_ a toolpost grinder?
23:06 GuShH_ I see lots of them for sale but they are HUGE
23:11 GuShH_ rue_mohr2: how do you deal with the abrassive dust left behind?
23:11 GuShH_ it would surely ruin your ways
23:11 GuShH_ it is a very simple machine you could build in an afternoon (you)
23:12 GuShH_ not me, I would obsess over tiny details and spend a month.
23:12 GuShH_ you know what a good stone size would be for one of these lathes, the stones sold for hand drills
23:13 GuShH_ often come with a flapper and sand paper
23:13 GuShH_ that abrassive wheel I've never been able to use on anything.
23:14 GuShH_ not sure if they can handle the high speeds you'd typically use on a toolpost grinder though
23:14 GuShH_ and a diamond wheel couldn't be cheap, at least for me
23:15 GuShH_ https://www.youtube.com/watch?v=IHNLSnFSKrM
23:16 GuShH_ makes a lot of sense for this
23:17 GuShH_ that's a very simple design
23:17 GuShH_ you could just grab a cheapie dremel and make a bracket for it
23:18 GuShH_ this guy has more tools than you can imagine
23:20 GuShH_ PERSONAL RESPONSABILITY haha
23:21 Faek Have i got someone on ignore by accident or is GuShH_ talking to himself?
23:21 GuShH_ I'm talking to myself sadly
23:21 GuShH_ you guys suck, that's the problem!
23:21 MjrTom but the gals blow
23:22 GuShH_ hah
23:22 MjrTom generally speaking, where's a good place to get bearings?
23:22 ShH_ sighs... wants a big old lathe but doesn't have anywhere to hous
23:22 GuShH_ china, if you want cheapp
23:22 MjrTom is there a maker space where you live?
23:22 GuShH_ otherwise find a local bearing store!
23:22 MjrTom china is pretty big; can you be any more specific?
23:22 GuShH_ eBay
23:22 GuShH_ not that I'm aware of, why?
23:22 MjrTom besides ebay or amazon
23:22 GuShH_ I don't like to lend tools, or use someone else's tools
23:22 MjrTom maker space is a good place to house a lathe
23:23 MjrTom * hacker space I meant
23:23 GuShH_ no way in hell I would leave a lathe for some bunch of newbies to ruin
23:23 GuShH_ maker spaces are worse than schools.
23:23 GuShH_ and you don't want anyone to access this kind of tool, they'll get themselves killed and then you'll be in a lot of trouble.
23:24 MjrTom so anybody have any more specific answer that doesn't include ebay or amazon?
23:24 GargantuaSauce http://www.ebay.ca/itm/400570660963 hmmm maybe i won't bother with discrete drivers
23:24 GuShH_ aliexpress
23:24 GargantuaSauce MjrTom: quality, or cheap?
23:24 MjrTom quality
23:24 GuShH_ direct suppliers, not china
23:24 MjrTom I only need a few anyway, and fairly small
23:24 GuShH_ SKF stores etc
23:24 ShH_ just walks to the local skf s
23:24 Fiesta what's wrong with ebay and amazon?
23:25 GargantuaSauce there's a bearing specialist store i cant remember...there's also mcmaster-carr if you're in the US
23:25 GargantuaSauce which is kind of expensive but has everything under the sun
23:25 GuShH_ Fiesta: he said quality :p
23:25 GuShH_ you kinda rule out ebay / amazon
23:26 MjrTom ok I'd forgotten about aliexpress somehow; that and mcmaster-carr and skf should take care of it - thx
23:27 GuShH_ diamond dressing tool... where the hell do I get one of those
23:32 GargantuaSauce apparently that bridge can handle a dead short just fine
23:33 GuShH_ why would you want a bridge to handle dead gnomes?
23:33 GargantuaSauce well everyone is short to me
23:33 GuShH_ you are just a freak!
23:33 GargantuaSauce i am well aware
23:33 GuShH_ which is why we love you
23:33 ShH_
23:33 GargantuaSauce <33
23:34 MrCurious you guys want to be alone??
23:35 GuShH_ no, we want you to watch.
23:35 MrCurious ok, stipuation, can i hold up @.@ score cards?
23:35 MrCurious #.#
23:35 GargantuaSauce only if i get a 10
23:36 MrCurious i am sorry, i am a very harsh critic
23:37 MrCurious why do the connecctors i want only exist in chen-zhen!
23:38 GargantuaSauce did you ever play c&c generals
23:38 GargantuaSauce WE BUILD FOH CHINA
23:39 GargantuaSauce http://www.youtube.com/watch?v=UPH9iKpM-fk
23:40 GargantuaSauce i believe that holds the answer you are looking for
23:40 GargantuaSauce speaking of connectors
23:40 GargantuaSauce it would seem that mechanically loading a female .1" header isn't the best idea
23:40 GuShH_ http://gabrielecirulli.github.io/2048/
23:41 GargantuaSauce oh man that game rules
23:41 GargantuaSauce the 3d version is best
23:41 GargantuaSauce http://joppi.github.io/2048-3D/
23:41 GargantuaSauce i got an 8192 earlier
23:41 MrCurious the chinese voice sounds indo-arab