#robotics Logs

Apr 09 2014

15:36 JEntrep hey everyone :)
16:04 JEntrep Anyone interested in starting a company? :P
16:07 Tom_itx what sort of company?
16:16 peeps any lathe users here? i'm watching a video where someone said he is using ethyl alcohol as lubricant for cutting threads in aluminum. seems an odd choice for lubricant
16:18 MrCurious GuShH_: uses lathes
16:19 RifRaf a bit odd yes, kerosine works , but a cutting lubricant works best, not sure of the exact makeup of it
16:20 GuShH_ MrCurious: what
16:20 MrCurious (1:59:12 PM) peeps: any lathe users here? i'm watching a video where someone said he is using ethyl alcohol as lubricant for cutting threads in aluminum. seems an odd choice for lubricant
16:20 GuShH_ peeps: alcohol is a good lubricant that leaves no residues it's used by the military to fit hoses and whatnot
16:20 GuShH_ where contamination is an issue
16:20 MrCurious makes sense as its not thick and sticky
16:21 GuShH_ but I don't use it for aluminum, a water based coolant with soluble oil works wonders!
16:21 MrCurious and its boiling point would keep the aluminum cool
16:21 GuShH_ on a pinch you can try WD40
16:21 GuShH_ it sucks but it's better than no fluid
16:21 GuShH_ MrCurious: I would worry about fume build up
16:21 peeps i iddn't realize there are water soluble oils
16:22 peeps i always thought water based coolants were suspensions or something
16:22 peeps isn't alcohol thinner than water, i would think plain water would work better than alcohol
16:22 GuShH_ you could try mayonese on a pinch too.
16:23 GuShH_ flood coolants are often just emulsions
16:23 GuShH_ peeps: but alcohol won't rust your tools
16:23 peeps haha, i'm not looking for the weirdest/cheapest hackiest coolant, just curious why alcohol
16:23 peeps ok
16:23 GuShH_ or shouldn't, on the short term.
16:23 GuShH_ beware of "homemade flood coolant" recipes... they will all rust your tools.
16:23 GuShH_ I tried it.
16:24 peeps i have read that coconut oil works ok for machining
16:24 GuShH_ you need rust inhibitors.
16:24 GuShH_ I've read about people using lard
16:24 GuShH_ rendered fat from pork and whatnot
16:24 GuShH_ seems to go way back.
16:24 MrCurious there is a lube stick i have for drilling that contains lard and something else
16:24 GuShH_ a light mineral oil works fine, with a brush or a syringe if you don't have flood
16:24 GuShH_ MrCurious: yum
16:24 MrCurious gives great results
16:25 GuShH_ on steel they use sulphur with mineral oil and I forgot what else...
16:25 Curious babels oon about heat removal and chip clear
16:27 GuShH_ :p
16:27 GuShH_ I need to grind some of my drill bits...
16:28 peeps just got my lathe, haven't done anything with it yet, still need to see how well its zeroe'd in
16:28 GuShH_ would you believe it, I got a what was it... 6MM and it came out bad.
16:28 GuShH_ it cuts oversize and chips mostly from one flute
16:28 GuShH_ of course you can't return cutting tools, since it's a cheap tool (6mm drillbits are cheap) I won't stress it
16:28 GuShH_ but makes me wonder...
16:28 GuShH_ it's a mid range brand
16:28 peeps just been reading and watching a ton of youtubes about lathes
16:31 RifRaf what lathe did you get?
16:31 peeps HF 7x10
16:32 peeps i think it wasn't assembled properly, there was a full turn of backlash in the cross slide
16:36 peeps i don't really understand the thread indicator thing, it wasn't touching the leadscrew
16:36 RifRaf yeah spend some good time dialing it in after you have had a bit of a play with it
16:36 RifRaf cutting threads is an advanced skill, do basic stuff firct
16:36 peeps is it supposed to disngage?
16:36 RifRaf yes
16:38 GuShH_ RifRaf: I hate cutting non metric on my lathe... because it doesn't have an imperial screw :(
16:39 GuShH_ peeps: it does, unless you disingage it to prevent wear.
16:39 peeps yeah it didn't come with the change gears anyways, got it used. i might end up just buying the all metal set from littlemachineshop
16:39 GuShH_ it rides on the leadscrew to give you a timing hint.
16:39 GuShH_ do that
16:40 peeps i'm still trying to figure out all the accesories i should get
16:40 GuShH_ arbor and jacobs chuck
16:40 GuShH_ live center if you can
16:40 GuShH_ hss bits
16:40 RifRaf GuShH_, yep, i'll do more threads when i get the lathe cnc'd
16:40 GuShH_ (1/4" maybe for your lathe)
16:40 peeps i just got a tailstock chuck, it came with some little hf bits with replaceable carbide, i don't have any parting tools
16:40 GuShH_ parting blade and holder
16:40 GuShH_ hss
16:40 GuShH_ or indexable if you can afford it
16:41 RifRaf btw posted to uruguay the other day, your neighbour, seems they have high duties as well
16:41 GuShH_ it's a tiny lathe no reason to use carbide
16:41 GuShH_ RifRaf: we are all messed up heh
16:41 RifRaf but at least postage rates were the same
16:41 GuShH_ I can western union at least, we'll see about that once I put the money aside
16:41 RifRaf work time :/
16:42 peeps should i just go to HF for parting tool? i think i need some center bits too
16:42 GuShH_ outside threading is not that advanced... inside is specially by hand
16:43 GuShH_ yeah get a center bit set
16:43 GuShH_ ideally one to accomodate the size of your dead / live center, but the size depends on the magnitude of your work too
16:43 GuShH_ the bigger, the more surface area you want riding on the center (but if you can accomodate a bigger hole, do that anyway)
16:44 GuShH_ what else...
16:44 GuShH_ some cutting oil
16:44 peeps it came with a live center. the very tip of it is chipped, but i think the way a center drill cuts it won't be an issue
16:44 GuShH_ you don't use the tip anyway
16:44 GuShH_ the center bit bores a tiny hole where the tip just "hovers" into, doesn't make contact with anything... in fact the hole is to accomodate the oil / lubricant for the center point
16:45 GuShH_ if you didn't know this you would just touch the work with the center bit and use the very point to hold the work, which is wrong.
16:45 GuShH_ you want the 60� making contact with the center
16:45 peeps should i get dead center for head/tail? to help zero it? i'm not even sure yet how that is adjusted
16:46 GuShH_ the tailstock should be in two parts, one lower one upper, the adjustment depends on the lathe... usually a couple grub screws
16:46 GuShH_ headstock, I think they are not very adjustable in most
16:46 GuShH_ dead centers are cheap so get a set
16:46 GuShH_ you can use a feeler gage to see if your tailstock aligns
16:46 GuShH_ gage or gauge I always mess that up... must be gage.
16:47 peeps are collets common for lathes or chuck is fine?
16:48 GuShH_ collets are great for small precision work
16:48 GuShH_ I don't have a set... too expensive
16:48 GuShH_ 3 jaw chuck and for more precision 4 jaw, for bigish parts
16:48 GuShH_ an indicator and a holder are a good investment :p
16:48 GuShH_ also a work light just for the lathe
16:48 peeps oh yeah the lathe is installed with 3 jaw, but the guy selling it had a 4jaw he threw in too :)
16:49 GuShH_ plate and dogs... I never had to use.
16:49 peeps and a faceplate which i guess is just to give different mounting pattern for the other chuck?
16:49 GuShH_ but it's good to have.
16:49 GuShH_ faceplate is often for the dog
16:49 GuShH_ or you can use it to mount anything, depending on how it is (slotted, etc)
16:49 peeps ok, don't have a dog
16:49 GuShH_ use a cat.
16:49 ShH_ g
16:49 peeps hehe
16:49 peeps i have 2 of those
16:50 GuShH_ you can make the dog it's just an L shape with a grub screw, more often than not
16:50 GuShH_ steady rests... handy for long thin work, but even then you can have issues... I got some interesting chatter patterns using them
16:51 peeps what is the arbor?
16:51 GuShH_ the shank
16:51 GuShH_ J33 or something like that, I forgot what the standard is I think J stands for Jacobs, but don't quote me on that...
16:51 ShH_ goo
16:51 peeps ok, i think that came with my chuck
16:51 GuShH_ yes
16:51 GuShH_ MT2 J33 is what I have
16:52 peeps yeah
16:52 GuShH_ I've had issues with that chuck / arbor
16:52 GuShH_ I think the jaws got bent somehow
16:52 GuShH_ but I first thought it was an alignment issue so I used layout dye and sanded the high spots
16:52 peeps http://www.amazon.com/gp/product/B004CVJC20/ref=oh_details_o00_s02_i00?ie=UTF8&psc=1 i got this
16:53 GuShH_ sadly the arbors here cost more than a medium range chuck, it's nuts.
16:53 peeps it looks pretty nice to my untrained eye
16:53 GuShH_ looks like a copy of the real jacobs
16:53 GuShH_ they work fine, I do need a new one though.
16:53 GuShH_ it's nice to have a smaller chuck for smaller bits
16:53 GuShH_ 1-13mm and 3-16mm for example
16:54 peeps the jaws close down to like nothing on this chuck
16:54 peeps a pin hole gap
16:55 GuShH_ I want a keyless one
16:56 GuShH_ never used one, how the hell do they adjust with just hand pressure?
16:56 GuShH_ sounds like a real time saver
16:56 GuShH_ not like I lose the chuck keys, it's just not convenient.
16:59 JEntrep I'm back
16:59 JEntrep from outer space
16:59 MrCurious i dont care for hand tightened ones on drill presses
17:00 MrCurious they are fine for hand drills, but on presses i drive harder, and bits will catch with hand tightened
17:01 peeps JEntrep, did you just walk in to find us here with that sad look upon our face?
17:02 ntrep changes the lock and throws away the
17:13 peeps GuShH_, do you use a dial indicator much on the lathe?
17:14 peeps i have one but no mount for it yet
18:09 MrCurious last night i worked out a GREAT use for a magnetic mount base that lost its arm...
18:09 MrCurious stick it to a drillpress table to make a easily resettable L to align work
18:10 JEntrep I have no idea what you just said :)
18:10 JEntrep Pictures! :O
18:10 JEntrep :P
18:11 MrCurious http://www.harborfreight.com/multipositional-magnetic-base-with-fine-adjustment-5645.html
18:11 MrCurious the arm fell off because it was crap
18:11 MrCurious BUT
18:11 MrCurious the magnet base still works with a magnet on/off switch
18:11 MrCurious add a bar to the side, and its a corner holder for setting work to be drilled
18:19 GuShH_ lol
18:19 GuShH_ you could say that about everything that store sells "it fell off"
18:20 GuShH_ peeps: I use it when I rarely use the 4 jaw chuck or when I want to check some alignment or a specific depth
18:20 GuShH_ you can use them as tiny depth gages to know how far you've drilled or cut a groove, etc.
18:20 peeps which lathe do you have?
18:20 GuShH_ far more precise than the markings on the quill
18:21 GuShH_ a big-ish china job, will replace for a bigger old iron beast.
18:21 GuShH_ 30 inch bed or so
18:21 GuShH_ currently
18:21 peeps i'm wondering how bad the runout is on mine
18:21 GuShH_ for that you need a test indicator but a dial indicator will suffice for what it's worth
18:21 GuShH_ with a holder of course
18:22 GuShH_ peeps: what do you plan to turn?
18:22 GuShH_ sometimes a bit of runout doesn't matter depending on what you are doing
18:22 peeps i'm a little concerned this was abused(after seeing the live center tip busted), don't know how hard it is to screw up one of these lathes.
18:22 GuShH_ any noob will abuse any tool
18:22 GuShH_ without proper guidance
18:22 GuShH_ it's easy to screw up one of those with the plastic gears and whatnot
18:23 peeps GuShH_, nothing in particular right now, just trying to learn general usage
18:23 GuShH_ take it all apart, clean it up, adjust your gibs properly
18:23 GuShH_ the indicator will help you with that as well
18:24 GuShH_ I had to take apart mine almost entirely (minus the headstock) because I otherwise couldn't get it up the stand
18:24 peeps any recommendations on what to clean it with? mineral spirits? then regrease with lithium?
18:24 GuShH_ grease only bearings or gears, although I use thick mineral oil...
18:24 GuShH_ they sell gear oil
18:25 GuShH_ it's over 80 weight
18:25 GuShH_ wipe it with acetone or alcohol if you want to remove the old stuff
18:25 GuShH_ (until the wipes come out clean, which means a lot of wipes)
18:26 GuShH_ anyway I use engine oil... sae 30 or 40 for everything... fuck it, "way oil" is hard to find and is expensive here, you could try chainsaw bar oil which is as sticky though...
18:26 Hyratel speaking of cleaning with oil
18:26 GuShH_ I just keep it so oiled it never rusts
18:26 Hyratel I ran oil through the geartrain of a model electric steam engine until it ran clear but once it did.... it now runs butterysmooth
18:26 GuShH_ but seriously, you can also cut with that oil, although it's far from ideal.
18:26 GuShH_ :)
18:27 peeps i have a bunch of 30 weight generic motor oil that came with my house, hehe
18:27 Hyratel I fogret - is higher numbers thicker?
18:27 GuShH_ Hyratel: with thick grease on the geartrain of the lathe I got a loud sound and a sticky "flicking" noise as well...
18:27 GuShH_ without any oiling you get grinding sounds of metal against metal, it's not nice.
18:27 Hyratel because steam engine oil is 600 wt
18:27 GuShH_ so I plan to add drip oiling.
18:27 peeps 600 ? (O_O)
18:27 GuShH_ but right now I'm working on the flood coolant
18:28 peeps i can't even imagine
18:28 GuShH_ grease heh
18:28 GuShH_ syrup should be around that number!
18:29 GuShH_ peeps: it's got a lot to do with the temperature they run at
18:30 GuShH_ and most likely due to looser tolerances I bet the oil plays a role in that as well
18:30 Hyratel peeps, it's meant to withstand sustained high temperatures and extreme shearing forces
18:30 Hyratel also yes, but not as loose as you may think
18:30 Hyratel the piston seals have to work both directions
18:31 Hyratel so you can't have as dramatically-profiled piston rings
18:31 GuShH_ looser than say a diesel heh
18:31 ShH_ frowns at the co
18:31 GuShH_ why are you so nasty you bastard.
18:31 Hyratel and yes, it is syrupy thick
18:32 Hyratel 150 PSI is something like ... 370*F?
18:32 GuShH_ what are you doing playing with steam!
18:32 GuShH_ I used to work with high pressure steam boilers
18:32 Hyratel a steam car on a jeep chassis
18:32 GuShH_ haha
18:32 Hyratel "car" used loosely
18:33 JEntrep O_o
18:33 Hyratel it has seats and a steering wheel
18:34 Hyratel and runs on four road wheels. but it has no bodywork ; the boiler is 30 gallon, and it has a chain drive from the steam engine to the transmission input
18:34 peeps GuShH_, drip oiling on the transmission?
18:36 GuShH_ peeps: yeah and gearbox
18:36 GuShH_ it's already drip, but manual...
18:36 GuShH_ tiny oil ports you squeeze oil into
18:36 GuShH_ you can hear a definite change in sound and thus vibration when you freshly oiled it
18:37 GuShH_ specially if you run it at high RPM all the time which I do
18:37 GuShH_ (I recommend you start at low RPMs)
18:37 ShH_ is converting it to 3 phase curre
18:37 peeps fancy
18:38 peeps unrelated, i got a free 110A truck alternator today to play with, wanna drive it as a motor for fun, not sure if it would be good for anything in particular
18:39 peeps using a hobby ESC
18:39 GuShH_ why fancy? I'm adding a VFD
18:39 GuShH_ I want soft start among other features.
18:39 GuShH_ 320 bucks for the new motor and the vfd
18:39 GuShH_ :/
18:39 peeps hey that's more than i paid for my lathe!
18:40 peeps :-P
18:40 GuShH_ it's a Danfoss VFD
18:40 GuShH_ Hrmm
18:40 GuShH_ well I'm sure you could buy the pair for half of that where you live
18:40 GuShH_ but not here.
18:40 peeps where are you?
18:40 GuShH_ Argentina sucks big time.
18:40 peeps ah
18:41 GuShH_ it's 200 bucks for the VFD and 120 for the motor
18:41 GuShH_ 1HP only
18:44 GuShH_ I'm 20 bucks down on the coolant system so far ... I guess it's another 20 to finish it heh, cheapest part.
18:44 peeps what are you pumping it with?
18:45 GuShH_ 18W aquarium pump
18:45 GuShH_ I'm waiting on the flex hose...
18:46 peeps i read that some people use car wiper fluid pumps
18:46 GuShH_ yeah thought about it
18:46 GuShH_ but they cost more used than the new pump I got
18:46 GuShH_ 12 bucks new
18:46 GuShH_ with proper filtration it should be fine.
18:46 peeps ah
18:47 GuShH_ it's going to live inside a plastic bucket
18:47 GuShH_ with a lid, on a shelf.
18:47 peeps do you ever hob gears on lathe?
18:47 GuShH_ nope
18:47 GuShH_ no proper way to index, other than a drillbit on the main gear...
18:47 GuShH_ hrmm I should get another pump just for oil, I doubt it would work though since the oil is thick
18:48 Hyratel a BLDC ESC is a type of VFD
18:49 GuShH_ peeps: do you have a chip / swarf pan?
18:49 GuShH_ bleh might be called a tray
18:50 peeps yeah it has a tray that it sits in, with rubber feet
18:50 GuShH_ cute
18:50 peeps http://images.harborfreight.com/manuals/33000-33999/33684.PDF
18:51 peeps the whole thing is just like 90lbs
18:52 GuShH_ heh
18:52 GuShH_ hrmm so it has a dc motor?
18:52 Hyratel I think my favorite micro USB cables are Mnoprice Pro cables
18:52 peeps yeah i guess so
18:53 GuShH_ Hyratel: I like bananas
18:53 GuShH_ peeps: keep the indicator disingaged unless you are threading :p
18:53 GuShH_ can't see on the pics but it's probably one allen screw
18:54 GuShH_ where it pivots and locks
18:54 peeps it is
18:54 GuShH_ the cool thing about that little lathe is it's got backgears
18:54 Hyratel http://www.monoprice.com/Category?c_id=102&cp_id=10303&cs_id=1030307
18:54 Hyratel "premium" cables
18:55 Hyratel they're like a dollar more, but the connector body for the micro tip is a lot smaller than most others, meaning it's less of a sticky-out liability
18:56 GargantuaSauce monoprice is the best but it comes through the states so i get dinged with duty :(
18:56 Hyratel http://www.monoprice.com/Product?c_id=103&cp_id=10303&cs_id=1030307&p_id=9762&seq=1&format=2
18:56 MrCurious doesnt canada have any cool tech shops? buy local?
18:56 GuShH_ candauh
18:57 Hyratel MrCurious, Monoprice is good stuff, Cheap
18:57 GargantuaSauce yeah i could pay $20 for one at The Source by Circuit City
18:57 MrCurious i order there myself
18:57 MrCurious thought circuit city died. it died in america
18:57 Hyratel GargantuaSauce, how much is import duty for a USB cable?
18:57 GargantuaSauce it's HST so 14%
18:58 GargantuaSauce BUT the mail carrier will charge brokerage fees
18:58 GargantuaSauce which often triples the cost
18:58 GargantuaSauce it's a fucking scam
18:58 Hyratel that still puts you ahead of the curve
18:58 GargantuaSauce yeah but i'll just buy from china instead
18:58 MrCurious finally the truth comes out about how national health care system is funded...
18:58 MrCurious on the backs of consumers
18:58 GargantuaSauce no that's strictly for F-22s
18:58 GargantuaSauce sorry f-35
18:58 GargantuaSauce the shitty one
18:59 MrCurious wonder what the duty is on the import of one of those... and brokerage fees
19:00 GargantuaSauce and by mail carrier i mean courier, so that doesnt even go to public funds
19:00 Hyratel is there not a Canada Public Post?
19:01 MrCurious you need a p.o. box located just across the border
19:01 MrCurious batch your orders, and go there to pick em up
19:01 GargantuaSauce yes and i don't think it's an option for monoprice
19:01 GargantuaSauce usps stuff goes through fedex iirc
19:01 GargantuaSauce also canada post is getting shit on and losing all its funding
19:02 GargantuaSauce they're going to STOP DELIVERING MAIL
19:02 GargantuaSauce i am going to have to go to a community mailbox starting later this year
19:02 GargantuaSauce IN THE CITY
19:02 GargantuaSauce this pisses me off to no end
19:02 MrCurious will that eliminate the courer broker fees?
19:02 GargantuaSauce no that's ups mostly
19:03 MrCurious why do you stay in that screwy country
19:03 GargantuaSauce better than argentina
19:03 MrCurious 2true
19:03 GargantuaSauce and i refuse to live in the states
19:07 MrCurious how about sweeden
19:07 MrCurious they have a really nice 2 weeks every summer
19:11 peeps GuShH_, re: making gears, i was watching this earlier https://www.youtube.com/watch?v=lqreWsmXG4k
19:11 GargantuaSauce i want to make herringbone gears :(
19:12 GargantuaSauce but a 4axis cnc would be a Project or $3500
19:12 MrCurious + duty and brokerage...
19:13 peeps if you don't mind plastic gears, 3d printer is great for herringbone
19:13 GargantuaSauce i cant make my printer do dickall right now
19:13 GargantuaSauce going to ditch marlin for sprinter and try again this weekend
19:13 peeps what do you have GargantuaSauce
19:13 GargantuaSauce a shitty-ass mendel
19:13 peeps like original mendel?
19:14 peeps or prusa mendel?
19:14 GargantuaSauce it's the reprappro mendel so i think it includes some but not all of prusa's i2 changes
19:15 peeps oh, i had a prusa i2. it printed pertty well until i melted it in my car
19:15 peeps rebuilding now as a wolftsock delta style printer
19:15 peeps the herringbone i printed was one of the prettiest parts i got out of that printer
19:19 peeps what a texas summer does to PLA (warning: graphic content :P) http://i.imgur.com/RMX9QvX.jpg
19:19 peeps anyways threaded rod frames are awful
19:22 peeps i'm glad newer repraps are mostly moving away from that design decision
19:23 peeps sounds like corexy is the hot new trend for cartesian bots
19:47 rue_more Tom_itx, !
19:47 rue_more http://ruemohr.org
19:47 GargantuaSauce erp/
19:48 GargantuaSauce https://www.youtube.com/watch?v=BIiZuAVZH4w
19:52 rue_more erp?
19:52 rue_more link didn't work for ya?
19:52 GargantuaSauce erp
19:52 GargantuaSauce http://ruemohr.org/erp/
19:53 rue_more you like my 404 page?
19:53 GargantuaSauce i am just commenting on its erpitude
19:54 rue_more do you like my erronious infinite amplifier grid?
19:54 rue_more its missing a resistor, can you tell which one?
19:55 GargantuaSauce base needs to be biased
19:55 rue_more :)
19:55 rue_more I had fun doing that tho
19:55 GargantuaSauce my analog-fu is lacking greatly and even i know that!
19:56 rue_more digital-fu is so much more concrete
19:56 GargantuaSauce ya
19:56 GargantuaSauce peeps that melty mendel is awesome
19:56 GargantuaSauce that's why they say keep a full set of printed parts i guess :)
19:57 rue_more I dont know how long I hit my head on a desk the day i was told that most circuits should work with values even 20% out
19:57 rue_more today I needed a 5.0k resistor for the hospital
19:57 rue_more I decided to try my luck in the 5.1k 5% bag
19:58 rue_more the first three I pulled out were 5.0k
19:58 rue_more I found 3 from 5.00 to 5.02
19:58 GargantuaSauce yeah the tolerance isnt necessarily a gaussian distribution
19:58 rue_more it took me a while to find a 5% 22k that was 22.0 tho
20:03 GargantuaSauce they have prett significant temperature coefficients too dont they
20:06 MrCurious you work on life support machinery...
20:06 MrCurious remind me not to get sick in south americac
20:07 MrCurious wonder if the person replacing the resitor next will copy the marking on the out of spec one you put in, or the value from the documentation
20:07 rue_more the last guy used two 10k in parallel
20:07 rue_more I have no idea what the controller even needs
20:08 rue_more we dont even know where it is
20:08 MrCurious i meana canada
20:08 rue_more we know it controls fans
20:08 MrCurious ok,sonot arespirator orheartmonitor
20:09 GargantuaSauce no there's serious regulations about that shit, you can't just unleash a rue on equipment like that, jeez
20:09 MrCurious i would hope that rue has been legislated against...
20:10 rue_more they called me "we have a broken switch, there are resistors attached to it"
20:25 Tom_itx rue_more did you move all your stuff there?
20:28 Tom_itx Premesiss has cat peanuts and crazy geek
21:29 rue_more no, its the same server
21:29 rue_more under a new dns name
21:30 rue_more :)
21:31 rue_more one of them said you had to provide your own radiation suit
21:57 GuShH_ rue on hospital equipment? f me.
21:59 rue_more I'm one of the guys who can get an obscure keyswitch with funny resistors in like 3 days
22:00 rue_more or who can make control plates for light dimmers in a day (that otherwise take a month and a LOT of money to get here)
22:01 ShH_ shi
22:02 GuShH_ THE PATIENTS ARE DYING..... CALL THE RUE NAO.
22:02 rue_more not into fixing squishy things yet
22:02 GuShH_ so they turn on the rue sign.
22:02 GuShH_ except it's broken, so they call the rue on the land line instead.
22:03 rue_more ok I found the SSC16 code
22:18 rue_more 9 years ago I modded it to run on a atmega32
22:19 rue_more its wrong tho
22:19 rue_more the main loop does timing and interrupts handle serial data
22:19 rue_more should be other way around
22:19 rue_more who cares if you dont get the serial data right away, get the timing right
22:21 GargantuaSauce i think that's a good way to do it actually
22:21 GargantuaSauce since you can disable interrupts for timing-critical sections
22:22 GargantuaSauce and the actual serial interrupt can just be incrementing a buffer pointer
22:22 rue_more its all timing critical
22:24 GargantuaSauce i need to get around to writing my f0 servo code
22:24 rue_more ?
22:24 GargantuaSauce guess i should build the board first though
22:24 GargantuaSauce the replacement for my hexapod servo electronics
22:24 rue_more not hobby servos...
22:24 GargantuaSauce going to have two servos per microcontroller
22:24 GargantuaSauce yes hobby servos
22:25 rue_more ughkgh
22:25 GargantuaSauce simply because i don't want to buy 24 of anything else
22:26 GargantuaSauce i plan on generalizing a bit to use encoder and endstop feedback if available, but the main use case to start will just be the pots
22:26 Tom_itx rue_more where did you get the domain service?
22:26 rue_more I'v had its for a while, its from doteasy
22:26 Tom_itx is it your server or theirs?
22:26 GargantuaSauce and i'm definitely not going to make it small enough to fit in the servo body which is why i'm going to double them up
22:26 rue_more they were having a sale a few years back and I thought I'd get a domain to play with
22:26 rue_more its the same server
22:27 Tom_itx yours?
22:27 rue_more I'm able to edit the dns records
22:27 rue_more its hackman127
22:27 Tom_itx ahh yeah i remember
22:27 GargantuaSauce AND the h bridges are going to be pretty beefy so i can later basically drop in replacement motors+frame to scale up if i get my hands on something suitable
22:27 rue_more I even remember to send him some thanks funding every so often!
22:27 rue_more GargantuaSauce, I'm interested
22:28 Tom_itx i should get a regular dns
22:28 rue_more I own the name, I can move it whereever I want
22:28 Tom_itx is that annual cost?
22:28 rue_more seems I pay $28/yr for it
22:28 GargantuaSauce i'm going to home etch the prototypes but once it's functional i'll do a run of boards
22:28 Tom_itx i saw 19 for one
22:28 rue_more and that also gives me an email server
22:28 rue_more and 100M of webspace (chuckle)
22:29 Tom_itx heh
22:29 Tom_itx my isp used to give me alot but they took it all back
22:29 Tom_itx well, not alot but some
22:29 rue_more yea, www.ruemohr.org is the 100M space
22:30 Tom_itx i just wish i could dump the port 81 crap
22:30 Tom_itx but my isp won't allow it
22:30 Tom_itx and i wanna keep the server goin here
22:30 rue_more 81 is a problem cause its the proxy port,thats why I use 82
22:31 rue_more but yea
22:31 Tom_itx i can switch any time but ppl are used to it
22:31 rue_more my problem with dyndns
22:31 Tom_itx but since i gotta switch anyway maybe it's time to do that too
22:31 rue_more hmm I should add a record for rueshouse
22:32 Tom_itx i like this router since i got it ironed out
22:32 Tom_itx alot less problems now
22:32 rue_more its intel based?
22:32 Tom_itx i dunno
22:32 rue_more oh its not an itx?
22:32 Tom_itx no
22:33 rue_more clkio is the main freq, right?
22:33 rue_more for 16Mhz avr clkio is 16Mhz?
22:34 GargantuaSauce my router is way overkill, need to find something more modern and power efficient
22:34 GargantuaSauce dual xeon mp :V
22:34 Tom_itx they have a bigger model now too
22:34 Tom_itx http://www.ubnt.com/edgemax
22:35 Tom_itx supposedly 2M packets/sec
22:35 rue_more fancy
22:36 Tom_itx about the same price as off the shelf
22:36 Tom_itx similar to the ddwrt ones
22:37 Tom_itx i thought this was interesting too: http://community.ubnt.com/t5/EdgeMAX/EdgeMAX-Lite-Expand-flash-memory/td-p/508921
22:38 GargantuaSauce that's pretty col
22:39 GargantuaSauce i was thinking a dual atom or something that i can run linux on (or perhaps try out pfsense) but that looks like it has pretty acceptable firmware
22:39 GargantuaSauce i cant stand most soho routers, even with tomato/ddwrt
22:40 Tom_itx it's very configurable and the gui _is_ getting better all the time
22:40 Tom_itx you can drop to a cmd line for the rest
22:40 Tom_itx or do the config in a txt file and upload it
22:40 rue_more at 16Mhz, 16bit counter 1 rolls over every 4.1ms, so its more than good enough to run a pwm channel
22:40 rue_more (hobby pwm)
22:41 GargantuaSauce please don't use software delays for timing
22:41 rue_more ... you were just defending the code that uses them
22:41 Tom_itx GargantuaSauce, i'm using their WIFI too
22:41 rue_more now your not?
22:41 Tom_itx works good
22:41 GargantuaSauce no i am saying you should spin on the value of a hardware timer
22:41 rue_more yea
22:41 GargantuaSauce instead of writing a solution that will break if you change compiler settings
22:42 rue_more just working out the values
22:42 GargantuaSauce oh ok
22:42 Tom_itx http://www.ubnt.com/unifi
22:42 Tom_itx those
22:42 rue_more zippo:/morfiles/programming/c/avr/servo# calc 1/16000000
22:42 rue_more 1/16000000 -->> 0.000000
22:42 rue_more this is a problem tho
22:42 GargantuaSauce lol
22:43 GargantuaSauce what's with the root shell
22:43 GargantuaSauce don't do that!
22:43 rue_more hahaha
22:43 rgantuaSauce rolls up a newspaper and brandishe
22:43 GargantuaSauce man 802.11ac is stupidly fast
22:43 e_more tries to find his wiffle bat for def
22:43 GargantuaSauce i definitely need to get my hands on some hardware that supports it
22:44 Tom_itx i've been happy with mine but it's not that fast
22:44 Tom_itx one of the round ones
22:44 MrCurious HEARTBLEED - we are all doomed
22:45 GargantuaSauce i've heard very good things about htis guy http://www.ncix.com/detail/asus-rt-ac68u-ac1900-dual-band-turboqam-f5-90144-1018.htm
22:45 Tom_itx i don't use it anyway, it's for all the laptops in the house and i don't have one
22:45 rue_more snprintf(textbuff, 35, "%f", result)
22:46 GargantuaSauce #define float double
22:46 rue_more it IS a double
22:56 rue_more %g rules
23:09 rue_more ok
23:10 rue_more 16Mhz, counter1 at /1 .5ms is 8000, 2ms is 32000 delta is 24000 which is 255*94 or 1023*23
23:10 rue_more or shall I leave the protocol 16 bit and use 0-24000 ?
23:11 rue_more its not a hush that falls over the room, its like a stagnent deadness
23:15 GargantuaSauce may as well do the latter
23:18 rue_more hmmm
23:18 GargantuaSauce or are you sticking with 9600bps
23:18 GargantuaSauce increasing that might be a good idea.
23:18 rue_more sync byte, servo number, and two bytes of postiion data?
23:18 rue_more na, i know how to do 115200 without errors
23:18 GargantuaSauce k good
23:18 rue_more but if its in the main looop, it'll be fine anyhow
23:19 rue_more interrupts will just finish and start pulses
23:19 GargantuaSauce maybe a maximum speed and target acceleration should be in the protocol
23:19 GargantuaSauce they could be in a separate configuration command though
23:20 rue_more no
23:20 rue_more just pulse control
23:20 rue_more the rest can be done by the pc
23:21 rue_more I didn't write void SimotaniouslyLinearlyInterpolateMultiAxis(axies_t * this) for nothing
23:22 rue_more huh, it should return a status_t
23:24 rue_more it has a sync() callback that can be used for timing
23:25 GargantuaSauce i plan on making my servo protocol quite fancy
23:25 GargantuaSauce i'll run it by you when i sketch it out properly
23:25 rue_more 32 byte packets
23:25 rue_more ?
23:26 rue_more :) I'm interested
23:26 rue_more I put a lot of thought into my protocols and I'd like to see what others come up with
23:27 GargantuaSauce they might be longer than 32 i dunno. also might have variable length
23:27 GargantuaSauce need to work out lots of details