#linuxcnc Logs

Nov 02 2017

#linuxcnc Calendar

01:49 AM IchGucksLive: good morning from germany
02:06 AM gloops: morning
02:09 AM IchGucksLive: ;-)
02:25 AM gloops: whats the burning cnc topic of the day?
02:36 AM IchGucksLive: gloops: keep the bits alive
02:37 AM IchGucksLive: and warm up the hydrauliks bevor work on shop temps below zero
02:37 AM IchGucksLive: im off today tire change as snow forcast to monday
02:40 AM archivist: missing breakfast error and ebay has changed my watchlist sort order
02:45 AM RyanS: can one go back to kernel config any time, or only before building /installing new kernel?
02:46 AM archivist: I think you can reinstall kernels
02:47 AM archivist: but the config is before the build
02:52 AM gloops: just pondering what to use for these ballnut bearings
02:53 AM gloops: not hollowing out solid bar
02:54 AM gloops: some pipe around the right diameter
03:01 AM RyanS: this stuff? http://handysteel.com.au/hollow-bar
03:01 AM RyanS: really expensive, at least in Australia
03:02 AM gloops: something like that would be ideal, i have got some but not wide enough, any pipe i can skim inside/outside to fit to fit
03:02 AM archivist: you need something tubular to carry the drive sprocket around the ballnut
03:03 AM gloops: bolt sprocket/pulley to ballnut flange from the other side
03:04 AM gloops: theres some good photos of someone who did it on the forum, basically same design i made
03:04 AM RyanS: it's funny how solid bar is cheaper
03:05 AM MarcelineVQ: solid bar means less processing steps
03:05 AM MarcelineVQ: "<gloops> whats the burning cnc topic of the day?" not quite cnc, reparing a mitsutoya dial caliper I found in a box my grandpa gave me. cnc, wiring up vfd and spindle
03:06 AM gloops: solid would be better in that i need a flange, my biggest drill bit is 1.5 inch though
03:06 AM gloops: still another 2 inch to scrape out
03:07 AM archivist: if the drive is in between bearings it is more balanced in forces
03:08 AM RyanS: uh-oh forgot my sudo password
03:11 AM gloops: archivist yes would be better central, but would need a 100mm bore
03:11 AM gloops: on the other side - 20mm
03:11 AM gloops: i saved the link to the one on linuxcnc forum but cant find
03:12 AM MarcelineVQ: RyanS: it's prob the same as your login password
03:17 AM gloops: that goes over the ballnut - or you could bolt it to the other side of the flange - https://postimg.org/image/73dhspuwzv/
03:18 AM gloops: if you bolt the other side you lose 80mm or so of screw
03:18 AM gloops: the bearings go on that shaft, held on by 2 lock nuts
03:18 AM gloops: the whole thing goes in an outer holder
03:19 AM RyanS: I am mad, why am I updating mmint when i could probably install wheezy iso and update lcnc to 2.8
03:19 AM gloops: you can do that
03:20 AM gloops: im surprised you arent making these archivist, wherever one is posted everyone is asking the maker to do some for them
03:21 AM RyanS: actually it's done anyway I just hope mint isn't slower
03:25 AM archivist: gloops, my cnc lathe is too small for that sort of thing, have to do it manually
03:27 AM archivist: do have some reamers for getting bores right though
03:29 AM gloops: ive not got any reamers in these sizes, ill have a go anyway, might get it to work
03:30 AM gloops: i wouldnt try making for anyone, but would be interesting to see what prices they fetch - cant find many commercial made ones for sale anywhere
03:31 AM archivist: there is an expectation of china prices that one does not need to compete with
03:31 AM Deejay: moin
03:32 AM gloops: i dont know, a lot are forking out serious cash for these diy builds
03:33 AM gloops: theyll pay a few hundred for a screw, theyll pay for this, especially as it lets them go faster or longer
03:33 AM archivist: complete machines yes
03:33 AM gloops: have a look on the facebook groups, they think nothing of paying 500 quid for ally
03:33 AM archivist: I aint going anywhere near fb
03:34 AM gloops: the perennial problem with long beds - screw resonance
03:35 AM archivist: I should take more pics of people parking across my drive
03:36 AM MarcelineVQ: archivist: no reason not to
03:36 AM MarcelineVQ: set up a motion camera even that takes a couple mins of video on trigger
03:37 AM archivist: I had one for a while
03:38 AM archivist: like this http://www.collection.archivist.info/archive/DJCPD/PD/2015/2015_05_27_Prestige_Paving/IMG_1932.JPG
03:38 AM archivist: concrete lorry, lucky I had no work that day
03:40 AM archivist: that was opposite house, now next door is having drive done
03:41 AM gloops: lol
03:42 AM gloops: im sure theyd move if you needed to get out
03:42 AM MarcelineVQ: gosh
03:42 AM archivist: gloops, this lot will, the last lot were a bunch of bar stewards
03:43 AM gloops: if theyre being funny just get your car out before they turn up, leave it in their way
03:59 AM gloops: https://www.ebay.co.uk/itm/122775968797?
04:03 AM archivist: hmm not far.....but but but where to put it
04:04 AM MarcelineVQ: I'd sleep curled up on it
04:05 AM archivist: my house is 1960's and they built brick walls on wooden joists
04:05 AM MarcelineVQ: :o
04:06 AM archivist: so limited for upstairs weight, I am abusing it at that
04:06 AM gloops: wood will hold
04:06 AM archivist: I have some interesting cracks
04:07 AM archivist: one in the small bedroom is horizontal
04:07 AM gloops: nice base to bolt a machine to
04:08 AM gloops: its only settling lol
04:09 AM archivist: most of the upstairs doors cannot close fully
04:09 AM gloops: theyll hold it up then
04:09 AM gloops: shut them and leave them
04:10 AM gloops: probably got a trussed roof? they dont use very substantial spars
04:10 AM archivist: permanently open , one has a bookcase in the passage
05:20 AM jthornton: morning
05:27 AM RyanS: o/
05:36 AM XXCoder: heys
05:41 AM RyanS: well this is wierd, wheezy on virtual box with 2.8, doesn't like gmocappy, but axis works
05:42 AM RyanS: it freezes before gmocappy starts
05:43 AM XXCoder: bump stocks is back apparently
05:46 AM RyanS: great idea, fully automatic isn't dangerous at all
05:46 AM RyanS: (sarcasm )
05:47 AM XXCoder: another wonderful news: federal judge amy was confirmed
05:47 AM XXCoder: she belives judges should decide based on religion and not laws
05:47 AM XXCoder: (sarcasm)
05:48 AM RyanS: and Kevin Spacy is a paedo it seems
05:49 AM RyanS: it makes American Beauty feel a whole lot different now
05:49 AM MarcelineVQ: shouldn't it feel exactly the same
05:51 AM XXCoder: seriously fuck the pedos
05:52 AM RyanS: well, it seems less like acting now
05:53 AM gloops: why would people like that assault women, they must get more consentual offers than they could ever handle anyway
05:54 AM XXCoder: kevin?
05:54 AM XXCoder: hes pedo not woman assulter
05:54 AM MarcelineVQ: why would a rich person steal
05:54 AM gloops: i was thinking of that big actor in hollywood i dont know their names well lol
05:54 AM XXCoder: and forcing is only way some people can get hard
05:54 AM XXCoder: I dunno why they havent heard of little blue pills
05:55 AM MarcelineVQ: gloops: if you mean weinstein he's a producer and studio exec
05:55 AM MarcelineVQ: but there's plenty of others you could mean so you're still right
05:55 AM gloops: yes him, he was an actor though
05:55 AM MarcelineVQ: harvey weinstein isn't an actor
05:55 AM MarcelineVQ: *and wasn't
05:56 AM gloops: seems its about getting what you cant have
05:56 AM RyanS: well, I should more accurately say sex offender, not sure if he's literally a paedophile
06:03 AM XXCoder: https://www.youtube.com/watch?v=Mdcer1QQLrA
06:03 AM XXCoder: I hope it is real but I still very much doubt it
06:04 AM RyanS: House of cards wasn't much of a stretch for him to portray a megalomaniac asshole
06:05 AM RyanS: ...bad timing to mention cavity thrusters, lol
06:07 AM XXCoder: lol
06:11 AM archivist: XXCoder, my small dehumudifier is doing about a gallon a day
06:11 AM XXCoder: dang
06:12 AM XXCoder: mines at cup a day or so
06:12 AM XXCoder: my room dont have wet windows anymore
06:12 AM XXCoder: not too bad for elcrappo brand dehumidifier using pelter heh
06:13 AM archivist: volume of building is probably a lot different too
06:13 AM XXCoder: think its 1600 sqft here
06:13 AM XXCoder: I just wish I got dehumidifier earlier when I was at old home
06:14 AM XXCoder: my room and nephew had bad mold problem
06:14 AM XXCoder: true hepa filters helped but drying room would have helped also
06:16 AM archivist: RH is 56% at the moment with it on !
06:16 AM XXCoder: whoa
06:16 AM archivist: not put any heating on this morning
06:16 AM XXCoder: 65% here though. not too bad compared tpo 75% when I started!
06:17 AM XXCoder: my guess is my books held a lot of water, it was in apparently very slow water leak in closet
06:17 AM XXCoder: books is fine but held a lot of water considering its dry and releasing em
06:18 AM archivist: I have a lot of books, no idea of water volume held in them
06:18 AM XXCoder: not sure also, but dryish but not too dry is good
06:19 AM XXCoder: my books wasnt at that level but more "Wet"
06:20 AM MarcelineVQ: you could say his books are, dank
06:21 AM MarcelineVQ: as the kids say 'that is some dank paper, get lit' which I assume is a way of telling people to dry their musty tomes with radiant heat
06:22 AM XXCoder: lol
06:28 AM slipalong: Anybody know where to get support for NativeCAM?
06:31 AM archivist: on the forum probably or maling list
06:31 AM archivist: mailing
07:45 AM slipalong: I never got an email to confirm joing the linuxcnc form so I can post
07:56 AM JT-Shop: slipalong: what user name did you use?
07:58 AM JT-Shop: slipalong: you're good to go
08:01 AM * JT-Shop goes to clean chicken poop
08:05 AM slipalong: Thanks JT!
08:07 AM slipalong: JT, Its still saying my signing process isn't complete.
08:16 AM gloops: not tried nativecam, how does it compare to the others? fusion or freecad say
08:19 AM JT-Shop: slipalong: can you sign in?
09:00 AM gloops: 5 'drillpro' milling cutters arrive, barely more than £1 each, wonder how good these are
09:06 AM slipalong: Native cam is great for a quick simple 2D part when F360 is over kill but you can't be bother writing the g Code manually. Have a look at the videos on you tube.
09:08 AM gloops: ahh 2d, well im already covered for that so not much point learning it
10:39 AM archivist: gloops, you could make your surface grinder on that granite table
10:39 AM gloops: is not £10 anymore archivist
10:39 AM archivist: pfft minor point
10:40 AM gloops: surface grinder is ready anyway, just needs some bolts, will get tommorrow, ill post vid of fine surfacing abilities
10:41 AM archivist: I watched this at a quid https://www.ebay.co.uk/itm/Hilger-and-watts-auto-collimator-angle-measuring-telescope/222689910266
10:42 AM gloops: lol, nothing like getting your hopes up for 6 days, only to be destroyed in the last hour
10:42 AM archivist: I have part of one, wanted to complete the set!
10:43 AM archivist: I have the transformer and optical bit of a version
10:44 AM gloops: how does it work then?
10:45 AM archivist: the lamp sends a pattern that is reflected, the eye sees the angle of the mirror
10:46 AM gloops: so you focus until the pattern is sharp?
10:46 AM archivist: it is a form of autocollimator
10:46 AM sync: it is focused at infinity
10:46 AM archivist: http://www.brainkart.com/article/Angle-Dekkor_5832/
10:48 AM gloops: ok, in simplistic terms, this is a bit like the dambusters bomb sight
10:48 AM archivist: pointing at a window you can see the difference between front and rear reflection of the glass
10:48 AM archivist: nah nothing like the bomb site that does not send an image
10:49 AM gloops: still triangulating the points though
10:50 AM sync: no
10:51 AM archivist: they have a scale http://www.collection.archivist.info/archive/DJCPD/PD/2002/2002_05_30_Dobcross_crash_Wartburg/P1010026.JPG
10:51 AM sync: it just gives you the angle between itself and the mirror you bounce it off
10:51 AM archivist: was using one for a telephoto
10:52 AM gloops: synch you have to triangulate to get the angle
10:53 AM archivist: in the angle dekkor it is done by the scales, in a bomber it is the plane height and angle set on the site and time for the fall
10:53 AM gloops: if you put a long telephoto lens on a camera and view a wall through it say, you look at the far end of the wall and note the range, then focus the near end of the wall and note the range, you can calculate the angle the wall is at from you
10:54 AM archivist: that is what one uses surveying gear for
10:54 AM gloops: yes, same principle
10:55 AM archivist: not the same as angle dekkor
10:56 AM gloops: this is only the same scale you see on loads of old cameras, its a fairly crude rangefinding method
10:57 AM gloops: i wouldnt be surprised if this uses selenium cell metering
10:57 AM sync: you do not triangulate
10:58 AM sync: or well, the device does it for you by just giving you an image
10:58 AM sync: but it is just based on infinity optiocs
10:58 AM sync: ~optics
10:58 AM gloops: yes, you dont calculate, the scale provides that
10:58 AM sync: it doesn't have to be a scale
10:59 AM sync: my electronic one does not have a scale
11:00 AM gloops: well, i cant say i have ever tried rangefinding on a macro level, as would be required for engineering
11:00 AM gloops: but the principles are pretty much the same
11:02 AM archivist: there is nothing to adjust as in a rangefinder with an angle dekkor
11:10 AM gloops: well good optical instruments are never cheap
12:16 PM IchGucksLive: hi all
12:32 PM JT-Shop: it's a lady bug invasion outside... can't even open the door to the new shop
12:32 PM IchGucksLive: JT-Shop: use pink sheets
12:32 PM IchGucksLive: and you are up in heaven
12:33 PM IchGucksLive: JT-Shop: and ofcause a kitchenaid in the front window
12:33 PM IchGucksLive: on top of some cool foam blocks
12:34 PM IchGucksLive: JT-Shop: here i show you how to quick make one on a mill https://www.youtube.com/watch?v=Xv7X6-E3wjY
12:38 PM IchGucksLive: probotix: hi how is the weather in FL
12:40 PM IchGucksLive: i still cand belive as on a cycle fast lane crossing 10 blocks no barrier for car
12:40 PM IchGucksLive: 1year beond france
12:40 PM {HD}: Any o/a welders here? I bought the harbor freight heavy duty torch kit and am looking for additional torch tips but I don’t know the torch tip threading standards. Any thoughts?
12:44 PM JT-Shop: often they are torch specific, are you talking about a welding torch tip?
12:45 PM archivist: or tig or what
12:46 PM {HD}: Welding o/a or oxygen acetylene
12:46 PM {HD}: I was hoping I could find after market because harbor freight doesn’t have all the sizes I want
12:46 PM archivist: they sometimes vary threads to stop intermixing
12:47 PM archivist: measure the threads
12:47 PM IchGucksLive: homedepo has lots of stuff
12:48 PM archivist: {HD}, you probably have a local welding supplies trade supplier
12:50 PM MarcelineVQ: usually oxy is right handed and the fuel is left hand thread iirc, idk if they vary thread sizes here but they do vary quick-connect ends
12:52 PM archivist: my local is https://engweld.co.uk/
12:53 PM IchGucksLive: im off discussion as europ has its own tread DIN
12:54 PM {HD}: This thing looks like 20G 1/4 threading. At least that’s the size that fits best from my thread gauge.
12:54 PM CaptHindsight: https://www.harborfreight.com/catalogsearch/result/index/?dir=asc&order=EAScore%2Cf%2CEAFeatured+Weight%2Cf%2CSale+Rank%2Cf&q=Oxygen+%2F+Acetylene+Tip
12:54 PM MarcelineVQ: I can't even find DIN components in the big stores here
12:55 PM archivist: those are nothing like the nozzles I have used, the copper was threaded
12:55 PM {HD}: CaptHindsight: well in the listings there called “Victor style“
12:56 PM {HD}: But I bought a “Victor style“ 00 size and it did not fit.
12:56 PM MarcelineVQ: welding tips tend to be single piece like that here, cutting and heating tend to be threaded for quick size changes
12:56 PM CaptHindsight: good luck, that's another down side to HF (besides the quality) replacement parts or lack of
12:57 PM archivist: and the tips may only cover a small range for each handle size
12:58 PM CaptHindsight: I got all my gas wrenches and torches on CL
12:58 PM CaptHindsight: name brand, easy to get tips and parts
01:00 PM archivist: in the UK British Oxygen was the main named supplier of gas and torches
01:03 PM {HD}: Well if anybody cares thanks to your guys help I was able to find the appropriate torch tips on eBay.
01:03 PM {HD}: They are 7/8“ x 20
01:03 PM {HD}: They are considered “heavy duty “
01:03 PM CaptHindsight: https://store.cyberweld.com/viwecureti.html
01:04 PM CaptHindsight: https://www.mscdirect.com/browse/tn/Welding-Soldering/Welders-Welding-Equipment/Welders/Oxygen/Acetylene-Torches/Oxygen/Acetylene-Torch-Tips?navid=12100726#navid=12100726+4294828258&sortby=price&dir=desc
01:08 PM {HD}: Thanks! Consider this topic solved =)
01:09 PM {HD}: More important news I’m updating my o/a rig in order to weld up a new steel frame to upgrade my CNC machine.
01:09 PM archivist: whose turn is it to send the invoice?
01:09 PM {HD}: I have an order in for a bunch of hollow structural steel that will be delivered by the end of next week.
01:10 PM archivist: why use gas when electric is faster with less distortion
01:11 PM {HD}: Because I had gas and my mig welder is too lightweight and I don’t want to invest in Tig at the moment.
01:13 PM archivist: I got a little inverter welder for stick recently, way better than my old transformer welder
01:14 PM {HD}: If I could pick up a used TIG machine I totally would!
01:14 PM IchGucksLive: is JT-Shop gfot sucked by the lady mop
01:14 PM {HD}: For cheap that is.
01:16 PM CaptHindsight: I got a new Chinaco TIG since all the boards inside are ~$100ea on eaby
01:17 PM CaptHindsight: but got a better torch for it
01:19 PM sync: the chinaco tig boards are all very similar
01:19 PM sync: and pretty easy to repair
01:20 PM CaptHindsight: https://www.ebay.com/itm/WSME-200-TIG-200-TIG-200P-AC-DC-Pulse-TIG-Welder-Welding-Machine-Aluminium-220V-/152280966316 but from a local dealer for similar price
01:21 PM CaptHindsight: on the other hand I will probably be able to get Lincoln or Miller parts for another 20+ years
01:21 PM CaptHindsight: but you pay for it
01:34 PM Tom_L: IchGucksLive cool foam cutter
01:34 PM IchGucksLive: ;-)
01:34 PM Tom_L: btw how do you do a tool change with a foam cutter tool? :)
01:34 PM {HD}: Just added tig to my craigslist rss feeds
02:05 PM * JT-Shop takes a Dr Pepper break with the chickens
02:27 PM IchGucksLive: im off Gn8
03:02 PM Tom_L: how does one manage to lose a whole spool of wire?
03:02 PM * Tom_L keeps hunting
03:02 PM Tom_L: someone should kick rone
03:38 PM gloops: yeah looks like a bot
03:58 PM gloops: made some technical observations earlier, by having the mrs stand on a piece of hardwood shelf supported on 2 pieces of 2x2 and watching for visible signs of bending - there were none
04:15 PM syyl: did you check with an indicator, gloops?
04:15 PM syyl: ;)
04:15 PM Deejay: eyeballing!
04:15 PM gloops: not on this occasion syyl, i might fetch a few different things box section, wood etc and try that tommorrow
04:16 PM syyl: :D
04:16 PM syyl: protip: dont call her "test-weight"
04:16 PM gloops: im pretty convinced hardwood would be acceptable for z axis plates for a router, if the fixings held
04:19 PM gloops: yes ill remember to use 'force' not 'weight' in future
05:30 PM Deejay: gn8
05:44 PM SpeedEvil: Wood is about 1/30th as rigid as steel (solid wood). If you have a beam of a fixed width, the stiffness of the beam grows with the depth^3. The third root of 100 is only 4.5 or so. Meaning a 1" steel square bar and a 1*4.5" beam will be as rigid vertically. If you expand the beam out so it remains square, that figure is something like a 2.2" beam of wood will be as stiff as steel.
05:44 PM SpeedEvil: Wood does move more, and is inhomogenous.
05:48 PM gloops: ahh, these simplistic comparisons are often used to attack wood SpeedEvil, theres more to it than that though
05:51 PM sync: yes, wood quality being not the same so that you have to apply even more of a safety factor for structurally important stuff
05:53 PM gloops: for construction the main factor is failure, this isnt the issue with a cnc machine
05:54 PM gloops: we are mainly concerned with stiffness
05:55 PM sync: you still need a lot of wood to be as stiff as a steel construction
05:58 PM gloops: a 400x200x30mm hardwood plate is not much behind a 20mm aluminium plate the same size in terms of stiffness
05:58 PM gloops: and about half the weight
06:01 PM SpeedEvil: aluminium is only about twice as stiff as wood.
06:01 PM SpeedEvil: (best case for wood)
06:01 PM SpeedEvil: With wood, bearing strength is a major issue of course.
06:02 PM SpeedEvil: https://i.imgur.com/lKyzXvz.jpg?1 - related. Test monitor stand. Works with 15kg test load, and does not sag at 1m.
06:02 PM SpeedEvil: Well.
06:03 PM SpeedEvil: It sags 6cm, evenly distributed, which was pretty much expected, and I do not care about.
06:04 PM SpeedEvil: Just need to replace the single PET washers at the joints with LDPE + perhaps grease, maybe not, and actually finish it up and cut off the extra bits.
06:04 PM gloops: what is that for?
06:05 PM gloops: the rectangle beam would be stiffer upright
06:06 PM SpeedEvil: yes. But the joints wouldn't work that way
06:07 PM SpeedEvil: It's to hold a monitor up to 1m away from the mount point on a desk, and ~40cm up.
06:07 PM SpeedEvil: With adjustment in the horizontal plane
06:07 PM SpeedEvil: Dimensions were determined by the first bit of scrap lumber I grabbed with little thought.
06:09 PM gloops: i imagine a lot of the movement is due to holes moving on the bolts
06:10 PM SpeedEvil: None of it.
06:10 PM SpeedEvil: The faces are clamped with large washers, and >100kg force over the whole face.
06:11 PM SpeedEvil: So, movement on the bolts is limited to slight wandering of the faces parallel to each other which I don't care at all about
06:14 PM gloops: well, i will probably use steel or aluminium for the z anyway, but i am fancing this piece of wood as well, could do it up nice with some brass strip edging and polish it up
06:15 PM gloops: like an old joinery gauge or rule
06:15 PM gloops: coach bolts to fasten the bearings, that would not move ever
06:18 PM gloops: you would be better using a metal hinge SpeedEvil
06:19 PM SpeedEvil: That's one way of doing it.
06:19 PM SpeedEvil: This seems to work fine