#linuxcnc Logs
Mar 12 2019
#linuxcnc Calendar
12:51 AM fragalot: hi
02:13 AM Loetmichel: mornin'
03:01 AM holzjunkie: morning
03:25 AM Deejay: moin
03:54 AM weenerdog: good mawnin
04:33 AM jthornton: morning
04:42 AM weenerdog: didjya track down that vac leak?
04:45 AM XXCoder: yo
04:45 AM weenerdog: xx howdy
04:47 AM jthornton: I don't have a vacuum actuator, I have an electric actuator and electric shifter
04:48 AM jthornton: and I'm glad I don't have to change the shifter it's a pain to get to, the actuator is easy to get to and easy to test... just need to clear a spot in the shop to work on it
04:52 AM weenerdog: heh i talked out my butt then
04:53 AM jthornton: many of the trucks I looked at while searching had that exact vacuum actuator you talked about so it is a popular one
04:53 AM weenerdog: its good they took the vacuum out of the picture though. its kind of convoluted. three different systems to pull a friggin cable out of the front diff 1" or so
04:56 AM jthornton: https://i.ebayimg.com/images/g/DccAAOSwwXRbyknn/s-l1600.jpg
04:56 AM jthornton: the white thing is the actuator... but mine is not so clean
04:58 AM weenerdog: hm
05:00 AM weenerdog: half the reason i still drive my old blazer is i've replaced every wearing part on it at this point. for a lot of jobs i can just grab the 3 sockets i need and crawl under once.
05:00 AM jthornton: chance of showers this afternoon here so if I can get the battery for the hoe and off load the logs from the trailer and tow the splitter to the carport and get the truck in the big shop oh and move all the wood working equipment out of the way I can work on the truck
05:01 AM weenerdog: i wanna build a new shop building to junk up :)
05:01 AM jthornton: my 81 C10 Custom Deluxe was like that 3 speed on the floor 350 easy to work on but no idea about what the miles per gallon was
05:02 AM jthornton: there is some Mennonite builders around here that built my last building much less cost than if I had built it and put it up in 4 days
05:02 AM jthornton: 30 x 50 x 12 with 2x6 walls
05:03 AM jthornton: hmm chickens wake up in 6 minutes
05:03 AM weenerdog: i'm gonna get married finally and she makes crap too, so she'll need a she-shed anyhow.
05:03 AM jthornton: cool
05:04 AM weenerdog: so i'm designing kind of a two-parter. she-shed on one side, welding & woodwork on the other...
05:05 AM jthornton: everything in my big shop has to be either on wheels or movable with a pallet jack
05:06 AM weenerdog: i got a 20x40 ish pole building, but its dirt floor.
05:06 AM weenerdog: good for what it is, but its no shop
05:06 AM jthornton: if I can't move it that way I built a gantry crane on wheels http://gnipsel.com/shop/gantry/gantry.xhtml
05:07 AM jthornton: I have a small pole building with a dirt floor but can't keep rats and other animals out of it
05:07 AM weenerdog: thats very cool
05:07 AM jthornton: I'm sure I could pick up 1/2 of the backhoe with it
05:08 AM weenerdog: nah you cant. its good for chainsaws, four wheelers, and whatnot.
05:08 AM jthornton: and one day I need to break the front off and replace some broken bolts and fix a couple of things
05:08 AM weenerdog: never ends, does it :)
05:09 AM jthornton: yea, there is no end in sight but it keeps you from getting stale
05:09 AM weenerdog: i gotta put the gearbox back on frankenbushhog soonish
05:10 AM weenerdog: cousin borrowed it in the fall and the predictable happened lol
05:10 AM jthornton: a bat wing bushhog?
05:11 AM weenerdog: its a bombproof old 5' covington deck i welded supports on for a bushhog gearbox
05:12 AM jthornton: I have an old 5' bushhog of unknown origin and a newer 4' that I use behind my Kubota B7500 but it's already rusting out lol
05:15 AM jthornton: after having coyote problems I cleared out most of the brush around my house in the woods so they can't sneak up as well, the 4' did that fine so I really need to get rid of the 5' bushhog
05:16 AM weenerdog: spring is tough. i kinda go from zero to bustass in the blink of an eye.
05:16 AM jthornton: chickens are out and about having being woke up by the RPi
05:17 AM jthornton: I can imagine there is a lot of farms around here on the flat land and they are up all night it seems
05:21 AM jthornton: I forget where are you located at?
05:21 AM XXCoder: wow https://play.google.com/store/apps/details?id=com.google.audio.hearing.visualization.accessibility.scribe&rdid=com.google.audio.hearing.visualization.accessibility.scribe&pli=1
05:21 AM weenerdog: hehe i used to work in the IT rat race. then i chucked it and turned into a farmer. a few years ago, i was in the town i worked in, sat near some guys i used to work with and they didn't recognize me. i was 60 lbs lighter and hadn't cut my hair or beard in a couple years (i'm clean cut again now) lol. i said hi and it took 'em a second
05:21 AM XXCoder: live transcription.
05:21 AM weenerdog: i'm in the mountains in NC, jt
05:21 AM XXCoder: i'd test it using video except my pc dont have any speakers lol
05:22 AM jthornton: ok I remember now
05:22 AM weenerdog: you're in the ozarks?
05:23 AM jthornton: yea south east missouri, I'm in the hills not the flats
05:23 AM weenerdog: nice
05:24 AM jthornton: I crack up when I get asked are you still at this address... I have so much crap I'll never move again
05:24 AM weenerdog: yeah no kidding
05:26 AM XXCoder: if I move again, ill dump most my stuff in back yard and put it on fire
05:26 AM XXCoder: and probably jump in it
05:26 AM jthornton: dang I need to get that shed to coop conversion done now so I can get the chicks going
05:26 AM weenerdog: i helped my uncle move once when i was a kid. about 300 mi. he was one of us. big shop full of everything cool. gawd
05:27 AM jthornton: yea, just moving that gantry crane from the machine shop to the big shop was a chore and took two guys
05:27 AM XXCoder: i cant imange it if i had 10 times more sruff like you guys do.
05:27 AM weenerdog: XXCoder, when i quit the IT rat race and left charlotte, i bought a 6' folding table at a yard sale, put most of the stuff from my apartment on it in the front yard with a sign that said "FREE SHIT" on my last day of work. came back, everything including the table was gone
05:28 AM weenerdog: there. moved lol
05:28 AM XXCoder: lol
05:28 AM jthornton: lol
05:29 AM weenerdog: put my clothes and a few toys in the car, cleaned the place, vamoosed
05:29 AM jthornton: that reminds me of the time I put a broken refrigerator out by the curb with a for sale sign on it and someone stole it lol
05:29 AM weenerdog: haha
05:30 AM weenerdog: cheap way to get it hauled away
05:31 AM jthornton: yea that was back when I lived in Laplace La, now we just haul that stuff to the scrap yard once a year or so speaking of that I need to make a run to clean up some crap
05:32 AM weenerdog: i got a load up at the barn
05:32 AM weenerdog: "but i might need that barb wire" lol
05:33 AM weenerdog: keep my christmas trees from straying
05:33 AM jthornton: yea never toss out barbed wire
05:34 AM weenerdog: or any piece of steel you can weld, as long as its bigger than your toenail
05:34 AM jthornton: yep
05:36 AM jthornton: I do a lot of steel fabrication so I have a whole wall of structural steel so I take slightly larger bits to the scrap yard
05:38 AM weenerdog: i do more farm fabricobbling. i look forward to having a decent shop to work in.
05:38 AM weenerdog: like... with a floor :)
05:38 AM jthornton: yea that is a good start
05:41 AM weenerdog: i got the farm making a living now though, so i can start thinking about stuff like that...
05:42 AM jthornton: that's the important part
05:43 AM weenerdog: hehe it was skinny starting out. takes 7 years for the first crop to go. and theres no work in my field here. lotta cornbread & beans :)
05:43 AM jthornton: what are you growing?
05:43 AM weenerdog: christmas trees
05:44 AM jthornton: I was wondering what crop went in the mountains but that makes sense
05:45 AM jthornton: lots of tree trimming I'd guess
05:45 AM XXCoder: i finally had an idea of using my tablet to play a video with audio on
05:45 AM XXCoder: took me couple attempts to turn audio on lol
05:46 AM XXCoder: quality is quite good, like autocaptions.
05:46 AM weenerdog: yeah thats the first fieldwork in the spring, jt
05:47 AM weenerdog: thats very cool, xx
05:47 AM XXCoder: yeah!
05:47 AM XXCoder: i plan to test it "at field" at work
05:47 AM weenerdog: i am scaling back the trees and changing partly to shrubbery about 2023, jt
05:48 AM weenerdog: its all a crap shoot
05:49 AM jthornton: I guess it just depends on the market which is impossible to tell 7 years out so yea you are a gambler
05:53 AM Tom_L: morning
05:53 AM weenerdog: well, i'm debt free, so worst case is i have to take carpentry work and eat beans & cornbread lol
05:53 AM XXCoder: sadly im not debt free lol
05:53 AM XXCoder: i hate debt :(
05:55 AM weenerdog: i can walk out in the front yard and piss while shooting a 30 round magazine into the ground beside me and not bother a soul :)
05:55 AM jthornton: yea best move I ever made
05:56 AM jthornton: well my neighbors know when I shoot but not when I piss lol
05:56 AM XXCoder: bb gun? if wanna shoot without bothering lol
05:56 AM jthornton: I only have 9 acres
05:56 AM XXCoder: careful with habits or you'll walk into your guests nude lol
05:57 AM jthornton: yea, I use my pellet rifle when I don't want anyone to hear me kill something
05:58 AM weenerdog: https://www.midwayusa.com/product/2506295321/aguila-super-colibri-ammunition-22-long-rifle-20-grain-lead-solid-point <---- those are quiet as a mouse
05:59 AM weenerdog: i mean scary quiet
06:00 AM jthornton: I have some Aguila 60 grain sub sonics but they say for bolt action only
06:01 AM weenerdog: ya
06:01 AM jthornton: wow 590FPS
06:01 AM weenerdog: they wont cycle my 10/22
06:01 AM jthornton: my Gamo .22 can shoot a pellet at 1050FPS
06:02 AM weenerdog: i got a good .177 pellet gun but i dont shoot critters with it. just paper.
06:03 AM jthornton: me and my neighbor have chickens so we are always on guard for threats cause everything likes to eat chickens
06:04 AM weenerdog: ya
06:05 AM jthornton: I'd bet the 20 grain at 590FPS has more stopping power than my .22 pellet
06:05 AM weenerdog: we have so many coyotes and hawks here, if i raise chickuns i'll have to keep them in an enclosure.
06:06 AM jthornton: we have coyotes, hawks and fox and the worst is dogs
06:06 AM weenerdog: but a lot of the time, when my farm work day is done, the last thing i would want to do is go around feeding animals...
06:07 AM jthornton: my neighbor free ranges hers and mine stay in chicken fort knox lol
06:07 AM weenerdog: lol
06:07 AM XXCoder: you'd need massive fortness for free range fort knox.
06:07 AM weenerdog: my grocery puts whole tenderloins on sale for $1.78 pretty often, and thats cheap pig farming...
06:07 AM jthornton: my feeder holds 1 1/2 sack of feed enough for a long time
06:08 AM jthornton: wow that is cheap
06:08 AM weenerdog: yeah i usually buy a couple and have them sliced. good on the grill.
06:08 AM jthornton: I have a lot of trees over my chicken yard so hawks don't like that
06:11 AM weenerdog: gf wants chickuns when we get married, so i guess i'll burn that bridge when i get to it
06:12 AM weenerdog: what baby wants baby gets i guess
06:13 AM jthornton: I can tell you about all the mistakes I made lol and give you a head start
06:14 AM weenerdog: i'll appreciate it
06:14 AM jthornton: chickens are really amazing from fresh hatched they know what to do to survive
06:15 AM weenerdog: i got a green thumb. i know jack about raising animals.
06:15 AM weenerdog: i grew up on a commercial farm, but no animals. no time for them.
06:15 AM weenerdog: just beagles and barn cats lol
06:15 AM jthornton: once you start having fresh eggs everyday you'll be glad you have some chickens
06:15 AM weenerdog: oh yeah
06:16 AM jthornton: you don't need a lot of them either
06:16 AM XXCoder: eggfights each week
06:18 AM jthornton: most people sell eggs for $2 a dozen but I know one guy that is smarter than that and puts an ad out saying he has room for one more customer at $5 a dozen
06:18 AM jthornton: http://gnipsel.com/images/chickens/
06:18 AM jthornton: that's a bunch of photos of my setup
06:19 AM weenerdog: looking
06:20 AM jthornton: http://gnipsel.com/files/chickens/mfaph.pdf
06:20 AM weenerdog: thats super sharp
06:20 AM jthornton: I cleaned up the Woods modern fresh air poultry house book it's a good read and a very good design
06:21 AM jthornton: if you use deep litter and have a feeder and water bucket like mine you only have to collect eggs once a day
06:22 AM weenerdog: her job :>
06:22 AM jthornton: yup
06:23 AM jthornton: if I was starting from scratch with the knowledge I've gained over the last few years I'd build the woods coop
06:26 AM jthornton: keep your eyes out and you may find some commercial roll out nest boxes in a yard sale https://cdn.shopify.com/s/files/1/0981/7352/products/IMG_1496_2048x@2x.jpeg?v=1505743009
06:26 AM jthornton: https://cdn.shopify.com/s/files/1/0981/7352/products/IMG_1528_b43b92d9-1e16-4afd-b6ca-c91f4c706ffd_2048x@2x.jpeg?v=1505743047
06:28 AM weenerdog: hehe egg machine. just add chickuns
06:28 AM jthornton: yep
06:28 AM weenerdog: be funnier to let tracybear fight the chickens over them
08:23 AM BitEvil is now known as SpeedEvil
12:06 PM fragalot: ~https://imgur.com/gallery/caOk2sx <== ffs boeing get your act together
12:08 PM SpeedEvil: http://sprott.physics.wisc.edu/Pickover/pc/shuttle.html keeping up quality journalism.
12:08 PM fragalot: xD
12:09 PM fragalot: maybe they meant light in ankh-morpork where it travels at the pace of molasses through the smog
12:09 PM gregcnc: that's just as good as the rest of the news
12:10 PM gregcnc: local channel spun 3 minutes about a video of a gate not being down for a train creeping threw a crossing
12:11 PM gregcnc: last sentace was the rail co was conducting a test and an engineer stopped traffic prior to entering the intersection
12:25 PM Rab: You won't believe this one weird FreeCAD trick: https://forum.freecadweb.org/viewtopic.php?t=7748
12:26 PM fragalot: long live parametric drawings
12:37 PM sensille: Loetmichel: lost an endmill here: https://i.imgur.com/IxizrnP.jpg is it possible that this happened because i didn't bother the keep the chips out?
12:39 PM SpeedEvil: if there are enough, they can wedge, and deflect bits enough to snap
12:51 PM _abc_: Hi. Are there sane comparisons between MACH3 and linuxcnc? I have someone pestering me about Mach3 because he is so into windows (and clueless). He also intends to run Mach3 on a substandard 10 year old machine which was slow then, under XP. Please provide me some articles for me to shoot him down with,
12:53 PM roycroft: xp is eol/eos
12:53 PM roycroft: now you're done :)
12:56 PM jym: XP VM FTW
12:56 PM jdh: let him. move on.
12:56 PM roycroft: if i'm honest, there's nothing inherently wrong with using mach3/windows for cnc control
12:57 PM roycroft: if that's what the user is comfortable with that might be the best solution
12:57 PM roycroft: however, 10-year-old hardware and an ancient version of windows is not something i would ever recommend
12:57 PM jym: _abc_: It's more than likely he's just intimidated of the linux learning curve, moreso than anything else
12:58 PM Loetmichel: sensille: looking at the upper right corner of your workpiece i would say that your z axis didnt pull out when the machine wanted to move x0y0
12:58 PM roycroft: i would posit that the ancient hardware would likely run linux/linuxcnc better than it can run windows/mach3
12:58 PM jym: My P2 runs TurboCNC just fine -shrug-
12:59 PM Loetmichel: jym: my first CNC ran with dos-PCNC and an 80486
12:59 PM Loetmichel: (and it still does)
01:00 PM jym: Loetmichel: TurboCNC can run on a 286 actually
01:00 PM Loetmichel: yes, it can
01:01 PM jym: Loetmichel: It's actually pretty impressive the memory manager he wrote in it
01:01 PM Loetmichel: you need about 30Mhz minimum though or your servo loop will be eating pretty all the computing power there is
01:01 PM sensille: Loetmichel: at least it ripped the stock out of the fastening
01:02 PM Loetmichel: sensille: have you ever had the axes standstill and worked the spindle thru the RPMs?
01:02 PM Rab: _abc_, you catch more flies with sugar than with vinegar. Just burn him a liveCD or USB stick and invite him to try it out.
01:03 PM Loetmichel: i had MASSIVE step loss while spindle is ramping up /ramping down until i put a shield on it and some clip ferrites
01:03 PM sensille: what do you mean? the spindle is running constantly at 24kRPM, i still switch it by hand
01:03 PM Loetmichel: i meant: change the frequency at the pot
01:04 PM sensille: no. i just cranked it up when i got it :)
01:04 PM Loetmichel: i had certain RPMs where the steppers would start to move all on their own slowly
01:04 PM Loetmichel: maaaan
01:04 PM sensille: ah, that way around
01:04 PM sensille: i'll try that
01:04 PM Loetmichel: start the spindle while the axis drivers are active
01:05 PM sensille: sounds funny
01:05 PM Loetmichel: and start changing the RPM
01:05 PM sensille: but do you think this can be related?
01:05 PM Loetmichel: those chinese VFDs are not really "EMI-filtered" ;)
01:05 PM sensille: haven't had any problems before
01:06 PM Loetmichel: it can be a problem if the spindle got load and produced more EMI because of more current
01:07 PM Loetmichel: also: check all the Stepper connectors
01:07 PM sensille: ok
01:07 PM Loetmichel: i had a couple fail on me after a few years, its not impossible that you have a few weak ones (the black "inline in cable" ones)
01:09 PM sensille: Loetmichel: first finished ones: https://i.imgur.com/IGJT535.jpg :)
01:09 PM Loetmichel: you can try to provoke it by starting the stemconf wizard again, "test" the z axis at max speed and +-20mm, than ramping the spindle RPM up and down FAST and try to wiggle all the connectors
01:09 PM Loetmichel: stepconf
01:09 PM Loetmichel: wizard
01:09 PM Loetmichel: you can HEAR if it stalls or loses steps
01:09 PM sensille: yeah
01:09 PM Loetmichel: whats that for again?
01:09 PM sensille: will do that as soon as that run's finished, thanks
01:10 PM sensille: some slacklining tool, to grip a slackline between 2 plates, with rubber in between an a rope through the holes
01:10 PM sensille: i'm quite proud how they came out :)
01:12 PM Rab: sensille, very nice. Are those powdercoated?
01:12 PM sensille: left, yes. right anodized
01:12 PM _abc_: Rab: the man is hooked and he has a "free xp install cd and license"
01:13 PM _abc_: his verbiage, not seen.
01:13 PM _abc_: jym: he already has 2 linux machines he uses sort of daily. But does not administer/work on.
01:15 PM Loetmichel: sensille: ah, "balancing"?
01:16 PM sensille: Loetmichel: https://souzslackline.com/wp-content/uploads/2018/06/3.jpg
01:16 PM sensille: something to do with balancing, yes
01:18 PM gloops: so you got the ally cutting going then sensille, looks fine to me
01:19 PM gloops: (steppers move on their own, noise/ground issue)
01:22 PM Rab: I want to do CNC engine turning with a cratex stick. But the cratex is consumable, so the "tool" length will change. Any ideas how to keep consistent pressure on a spindle?
01:23 PM Rab: I could use a spring-loaded tool holder, but I wonder if it's possible to monitor the Z-axis stepper current on plunges to maintain a consistent pressure as the tool shortens.
01:24 PM Rab: IOW plunge until step current starts to rise, I guess.
01:24 PM sensille: falls
01:25 PM Rab: Hmm, maybe it's easier to shim a strain gage under the motor mount.
01:25 PM SpeedEvil: Rab: see also applied science's latest video on youtube with EDM
01:28 PM weenerdog: could you put a very low resistor in the stepper power lead and measure the voltage across to derive the current (spitballing here...)
01:29 PM weenerdog: do any controllers have a pin you can use to sense the current? thats an interesting question you ask.
01:30 PM weenerdog: but you're gonna be dependent on how hard the tool crashes into the work before the current starts to go up
01:30 PM x2s: uhm, that's what ADCs do...
01:31 PM x2s: ADC+Shunt and you measure the current
01:32 PM weenerdog: sorry. i grow christmas trees by trade, and only mostly fuck up electronic thing :)
01:33 PM Rab: weenerdog, that would work. I believe it wouldn't take very many steps to see a decisive rise over the threshold of intrinsic resistance in the drivetrain.
01:34 PM fragalot: Loetmichel: wait you built a cnc that had EMI issues? shameful! :D
01:35 PM sensille: Rab: there are drivers that give you that information, like the tmc2160
01:35 PM fragalot: Rab: there are stepper drivers that have a constant torque setting, however I'm not sure how nicely they play along with linuxcnc without going crazy with scripts
01:35 PM sensille: measuring the current wouldn't help
01:36 PM sensille: the more steppers work the less power they actually consume
01:36 PM sensille: standstill is worst case
01:37 PM sensille: it depends on the load angle
01:37 PM Rab: sensille, plus I guess the driver is constant-current anyway.
01:37 PM fragalot: Rab: depends on the driver
01:37 PM fragalot: but generally, yes
01:38 PM sensille: reading some driver datasheets is quite insightful, for example the above tmc2160
01:38 PM Rab: L297/L298 in this case.
01:40 PM sensille: well, that is not that insightful
01:44 PM Loetmichel: fragalot: i bought a chinese CNC 6040... and had to redo wquite a bit of wiring before it worked like advertized ;)
01:45 PM Loetmichel: weenerdog: current thru a stepper is not linked to it having load or not
01:45 PM weenerdog: I know next to nothing about steppers and controllers (yet)
01:46 PM weenerdog: i was just flinging spaghetti at the wall to see if it sticks :)
01:46 PM Loetmichel: it will ALWAYS be the same current regulated by the stepper driver unless you go into RPM realms where the driver cant push enough current fast enough into the coils ( inductace problem, more voltage needed)
01:47 PM Loetmichel: inductance
01:47 PM Loetmichel: maaan my spelling sucks today
01:47 PM fragalot: you can however learn a lot by monitoring both the voltage & current at high resolution & speed
01:48 PM sensille: (or let a high-tech driver do it for you)
01:48 PM fragalot: sensille: exactly :D
01:48 PM fragalot: you could also just use a DC motor if constant force is what you want
01:48 PM fragalot: position it with a servo drive
01:51 PM weenerdog: rab : what are you doing, polishing? or work?
01:57 PM Rab: weenerdog, this, just for fun: https://www.cratex.com/jeweling-metal
01:58 PM weenerdog: ahhhh
01:59 PM Rab: The traditional method is just to chuck the stick in a drill press, but CNC seems like it would produce better results for a lot less work. Also programmatic patterns.
02:00 PM fragalot: Rab: put it in a tapping head?
02:00 PM fragalot: to give you the springyness
02:01 PM fragalot: also, has anyone here ever modified linuxcnc to read in a load cell to adjust an axis position for constant-pressure?
02:02 PM gloops: 99 pence bid (2 bids lol) https://www.ebay.co.uk/itm/Model-Engineers-Lathe/283410585056?
02:03 PM gloops: basically a free lathe
02:03 PM fragalot: it's useless though
02:03 PM fragalot: there is no chuck key :/
02:04 PM gloops: there is a line of thinking that those lathes are ideal for cnc conversion
02:04 PM gloops: ballscrew is shielded in the round bed
02:08 PM fragalot: https://imgur.com/gallery/XiVDK1B <-- lol.
02:09 PM gloops: the vikings only drank ale, not water - good thing to do in those days
02:10 PM Rab: gloops, wonder if those have the same issues as round column mills. What keeps the cross slide from rotating, I guess there's a channel in the column analogous to ways?
02:10 PM gloops: use a keyway/channel on the bottom Rab
02:10 PM gloops: usually
02:11 PM Rab: Seems like a bad setup for rigidity.
02:11 PM fragalot: and repeatability
02:11 PM fragalot: there is a reason box ways & lathe ways have won
02:12 PM Rab: But I bet the mfg was able to economically offer a number of different "bed" lengths, using the same set of castings. ^_^
02:12 PM gloops: no real reason the round bed should be any less rigid, you need clearance on a square bed the same
02:13 PM fragalot: the V ways positively locate your lathe carriage on standard lathe ways though
02:13 PM fragalot: where-as a square key allows for wiggle room
02:14 PM Rab: I wonder if the bed is a cast iron rod, or a steel pipe.
02:19 PM gloops: https://www.lancerregister.com/showthread.php?t=378816
02:20 PM gloops: view of underside there
02:20 PM gloops: ive got a round bed myford wood lathe, wood lathe is a slightly different beast though
02:22 PM gloops: the ones with a slotted saddle - you can tilt the whole thing, useful by-feature
02:23 PM gloops: (bed is cast)
02:24 PM Rab: Looks like cast iron.
02:24 PM Rab: err, right
02:26 PM gloops: UKs brexit deal soundly rejected by parliament again lol
02:26 PM fragalot: gloops: delay in the lobbies, apparently
02:26 PM fragalot: guess you're ahead of my live stream :P
02:26 PM fragalot: and you RUINED it!
02:26 PM gloops: fragalot May lost by 149
02:26 PM fragalot: :D
02:26 PM fragalot: spoilers
02:26 PM gloops: we all knew it was going down heh
02:27 PM fragalot: gloops: I mean, both the parties that want to stay, AND the ones that want to leave vote no
02:27 PM fragalot: i'm surprised it's getting as many votes FOR the deal as it does, lol
02:27 PM fragalot: christ her voice is shot
02:28 PM gloops: she did that voice thing once before, at her big speech at the tory conference lol
02:29 PM gloops: not a job you can call in and say 'sorry i cant make it today ive got a sore throat'
02:30 PM fragalot: yea, she can have it, lol
02:30 PM Papagno: Hi at all. i have test on real machine and simulation a exsternal offset configuration , with OFFSET_AV_RATIO = 0.5. But have aproblem. the machine not respect G0 rapid velocity . in ini file i have max_velocity = 2 , but the machine run in g0 at value 1 . if change value OFFSET_AV_RATIO = 0.9 the machine run in g0 at 1.9 about. it's normal exsternal offset change value the g0 rapid ?
02:33 PM gloops: where in the INI have got max velocity = 2?
02:34 PM gloops: the default rapid speed is determined by the...MV - near the top lol
02:35 PM Papagno: in axis[x] and join[0]
02:35 PM gloops: let me see if i have a config on this pc
02:36 PM Papagno: please test axis/exsternal_offsets/jwp_z.ini
02:37 PM gloops: TRAJ
03:00 PM Papagno: Hi at all. i have test on real machine and simulation a exsternal offset configuration , with OFFSET_AV_RATIO = 0.5. But have aproblem. the machine not respect G0 rapid velocity . in ini file i have max_velocity = 2 , but the machine run in g0 at value 1 . if change value OFFSET_AV_RATIO = 0.9 the machine run in g0 at 1.9 about. it's normal exsternal offset change value the g0 rapid ?
03:09 PM Tom_itx: JT-Shop, if you get what we got today you're in for a doozie
03:09 PM Tom_itx: looks like you could be on the edge of it though
03:50 PM JT-Shop: just starting to sprinkle here, got everything done I wanted to get done and Rusty is in the shop so when she cools down I can work on the 4 wheel drive actuator
03:52 PM JT-Shop: it may go north of me...
03:52 PM JT-Shop: famous last words lol
04:44 PM Tom_itx: looks like round 2 is just moving in..
05:15 PM Deejay: gn8
05:17 PM weenerdog: death to Ford!
05:18 PM weenerdog: putting a driver's side window in my pa's truck for him. gawd. they rivet everything and you have to grind them off
06:47 PM jym: _abc_: ah ok
07:09 PM Elmo40: if i go from a 30mm stepper to a 40mm stepper and the datasheet says it is only 0.4A more per winding, to use the stronger motors i need to increase the output of the step drivers?
07:09 PM _unreal_: you dont need to but you should
07:10 PM Elmo40: if i do not change anything, will the motors cause lag/skips or be the same strength as the smaller motors?
07:10 PM _unreal_: it could
07:10 PM _unreal_: ether it will show an issue or you wont even feel it
07:10 PM _unreal_: though using a larger motor I would suggest upping the current to match the motors needs
07:11 PM _unreal_: you'll notice problems most likely in the higher speed range if you dont up the amps
07:11 PM _unreal_: not saying you but you would be most likely to....
07:11 PM _unreal_: or heavy load
07:12 PM Elmo40: my end goal is faster speeds. i tapped out the little guys. just the whole gantry load and a light pass slowed them down too much.
07:12 PM gregcnc: if you are upgrading to get more performance, you may not get it if your don't drive it per spec
07:13 PM Elmo40: makes sense. need to feed the beast for it to push harder.
07:13 PM _unreal_: feed that beast
07:14 PM weenerdog: diesel stepper motors
07:15 PM andypugh: I think skunkworks K&T originally had hydraulic motors.
07:15 PM gregcnc: with a clutch and 18 speed?
07:16 PM weenerdog: word
07:16 PM gregcnc: there were some hydraulic servo machines I can only think of sounthbend magnaturn
07:22 PM andypugh: I blame “This Old Tony” https://photos.app.goo.gl/xJ4PhRGgUDPx6tfv9
07:22 PM weenerdog: lol
07:23 PM andypugh: Results are decent though: https://photos.app.goo.gl/gbSPYVddVjrEbVGZ6
07:23 PM weenerdog: This Old Tony and AvE rule
07:23 PM weenerdog: that is nice
07:24 PM andypugh: I think AvE is more of a fan of me than I am of him :-) (I am not subscribed to his channel, he is subscribed to mine :-)
07:24 PM weenerdog: lol cool
07:26 PM weenerdog: i've never subscribed to a chan on youtube
07:38 PM flyback: artifical limb gets handjob.c rootkit https://www.youtube.com/watch?v=4QSiPy_Rwyg
07:40 PM weenerdog: wheezing trying not to laugh
08:05 PM gregcnc: I need to look into phosphating. Basic chemistry is simple, but a few small additions reduce required temperature and time tremendously.
08:49 PM dgarr: Papagno: if you read back: with OFFSET_AV_RATIO=0.5 and MAX_VELOCITY=2 the max planned speed is (1-0.5)*2=1 (units per second) for G0 (or any G code or jog motion) since these are conventional, planned moves.
08:49 PM dgarr: See paragraph 1.0 of: http://linuxcnc.org/docs/master/html/motion/external-offsets.html
09:45 PM roycroft: so this motor i just bought is used, not nos as advertised
09:45 PM roycroft: it works ok, but the bearings are a little noisy
09:46 PM roycroft: what do you folks think would be fair compensation from the seller, should i keep it?
09:46 PM roycroft: i'm inclined to send it back at the seller's expense, but am willing to work with the seller
09:46 PM jdh: 30-50%
09:46 PM roycroft: it's a 3hp motor
09:46 PM roycroft: i paid $100 for it + shipping
09:46 PM jdh: single phase?
09:46 PM roycroft: 3 phase
09:46 PM roycroft: and my first thought is $50 would probably make me feel ok about it
09:47 PM jdh: how much is shipping back?
09:47 PM roycroft: i would cost $50 to ship it back
09:47 PM roycroft: it
09:48 PM roycroft: that's not how i came up with my number
09:48 PM roycroft: but it's an interesting coincidence
09:48 PM jdh: so you would still be out $50 shipping? or ?
09:48 PM roycroft: no, the seller would
09:49 PM roycroft: even though it was sold with 30 day return, buyer pays shipping, it was misrepresented
09:49 PM roycroft: my experience with ebay is that when a seller misrepresents something, ebay sends me a ups sticker and bills the seller
09:49 PM roycroft: and then refunds my money
09:49 PM roycroft: i don't want to open a case on this if i can help it
09:49 PM roycroft: i don't like doing that to sellers
09:50 PM roycroft: especially since i'm a seller myself - i am well aware of what they go through
09:52 PM roycroft: i've bought about 1000 items on ebay over the years, and have only left negative feedback once
09:52 PM roycroft: i always work things out or just write them off
09:53 PM roycroft: the one time was when i bought some very expensive software that was listed as legit, and turned out to be pirated on a cd-rom
09:53 PM roycroft: with a crack key
09:53 PM roycroft: i returned that, got my money back twice (because the seller was a moron), and left negative feedback
09:58 PM roycroft: the motor was in the factory box - i don't think the seller was trying to pull a fast one
09:58 PM roycroft: but it has obviously been rewired
09:58 PM Elmo40: the motor label says single phase?
09:59 PM roycroft: and inside the box was the original packing list from when it was delivered to lockheed-martin, and a manifest showing when it was put in service
09:59 PM roycroft: no, it is what it was listed as far as specifications
09:59 PM roycroft: but it was sold as nos and it is used, with bearings that are making a little noise
09:59 PM roycroft: it's the new vs. used thing that's the problem
09:59 PM roycroft: not the specs otherwise
09:59 PM Elmo40: i see
10:00 PM Elmo40: it has bolt marks on the feet?
10:00 PM roycroft: yes, of course
10:00 PM roycroft: and as i said, the wiring had been rearranged
10:00 PM Elmo40: crazy why they would list it like that
10:00 PM roycroft: i don't think it was intentional
10:00 PM roycroft: this is a big surplus house
10:00 PM roycroft: they move thousands of products every week i'm sure
10:01 PM roycroft: they glanced at it, it looked decent, it was in the original box
10:01 PM roycroft: they called it nos
10:01 PM roycroft: i don't blame them
10:01 PM roycroft: but i want them to make good on the mistake
10:01 PM Elmo40: send them a message saying you claim it to be used when they said it was nos.
10:01 PM Elmo40: and see what they will do
10:01 PM roycroft: i did
10:01 PM roycroft: and i did not specify how much of a refund i wanted
10:02 PM Elmo40: i'd give you 'store credit' towards another purchase.
10:02 PM roycroft: i just said that, because the bearings were noisy, i needed either a partial refund or a return at the seller's expense
10:02 PM roycroft: this is ebay
10:02 PM roycroft: "store credit" is not an option there
10:02 PM Elmo40: hence the quotes.
10:02 PM Elmo40: but they do sell other things that you might like.
10:02 PM Elmo40: if not, then ask for a partial refund
10:03 PM roycroft: i wish it were easy to figure out how much new bearings would cost
10:03 PM Elmo40: in the seller's eyes, they would rather keep the sale and offer credit towards another sale.
10:03 PM roycroft: but i don't have time to take it apart and find out what bearings are in it right now
10:04 PM Elmo40: 3Hp? not much at all. maybe $35 for the rear and max $60 for the front. If you go Timkin or the likes. Bearings are not all that expensive.
10:04 PM Elmo40: the time to do it costs more
10:05 PM roycroft: yes, and i don't mind the time
10:06 PM roycroft: i figured that $50 would probably come close to the cost of replacement bearings
10:06 PM roycroft: my preference would be to keep it
10:06 PM roycroft: it's a good, american-made motor
10:06 PM roycroft: to get a new "american" motor (which may well be made overseas, with a us label) would cost me $300-$400
10:07 PM roycroft: but i don't want the bearings to seize tomorrow afternoon
10:07 PM roycroft: and if they're noisy then the motor could seize any time between the next time it turn it on and infinity
10:09 PM roycroft: other than the noise it runs very smoothly
10:09 PM roycroft: i ran it at full speed (3450rpm) on the bench without clamping it down and it did not want to move around at all
11:02 PM Elmo40: well balanced
11:02 PM Elmo40: that is one thing that imported motors suffer from.
11:02 PM Elmo40: shake
11:24 PM roycroft: this is an ao smith
11:24 PM roycroft: who used to be a very reputable motor manufacturer
11:25 PM Elmo40: aren't they a water heater company?
11:26 PM roycroft: they do a lot of stuff
11:26 PM roycroft: and were heavily into hvac
11:28 PM Elmo40: Yamaha also does a lot of stuff... motorcycles to pianos to ocean liner engines!
11:34 PM roycroft: all i know is that the old ao smith motors were up there with the old baldor, leeson, dayton, etc. motors in quality
11:34 PM roycroft: these days most of that stuff is made in asia and branded usa
11:34 PM roycroft: like most things, sadly
11:35 PM roycroft: in my experience that does not necessarily mean the quality is degraded, but it means one can't base purchases on reputation alone any more - the quality can be too variable
11:38 PM Elmo40: i've noticed that.
11:38 PM Elmo40: with baldor the most!
11:38 PM Elmo40: in the past 3 years customers have bought brand new motors, ranging from 5 to 30, and i'd say 8% have failed by now.
11:50 PM Wolf__: hmm, think this would be overkill for moving stuff around my garage? https://www.bidspotter.com/en-us/auction-catalogues/bscequi/catalogue-id-bscequi10027/lot-8a562de0-7c74-4e8b-93e3-a9c2014a75b3
11:51 PM Elmo40: nope
11:51 PM Elmo40: just find a place to store it afterwards...
11:54 PM roycroft: i think you would need a bigger shop to use that, wolf__
11:54 PM roycroft: so if your goal is to build a bigger shop, by all means bid on it
11:54 PM Wolf__: lol yeah
11:54 PM roycroft: if you win you'll have to build the new shop
11:55 PM Wolf__: I want the smaller 400ton set @ the same auction lol