#linuxcnc Logs

Apr 22 2019

#linuxcnc Calendar

12:03 AM XXCoder: Jymmm: one iof things I liked about it was how he used ut as "lathe" to fix itself
12:07 AM XXCoder: a motor, shift and wheel itself gets turned into very large diameter wood lathe
12:09 AM Jymmm: XXCoder: Maybe, but that was the intension iirc
12:09 AM XXCoder: intention?
12:24 AM Jymmm: a 3d printer that could relicate itself for others - open hardware
12:24 AM XXCoder: yeah though 100% requires entirely different tech. like star trek replicatior
01:06 AM gloops: supposing someone wants to run some g code, xyz machine, but retain control of the z by jog controls, is that possible?
01:06 AM XXCoder: not certain what you meant
01:07 AM XXCoder: you mean while its running you can jog z?
01:07 AM gloops: yeah thats it
01:07 AM gloops: for a plasma, to adjust z height while its running code
01:08 AM XXCoder: i thought of alternate solution, have 2 z setups, one purely z jog, other is cnc
01:08 AM XXCoder: but maybe there is simpler solution software way
01:09 AM gloops: it would need 2 configs running at once
01:09 AM XXCoder: not if pure jog one is on its own setup. encoder -> rspi -> stepper thats i
01:09 AM XXCoder: maybe one limit switch so you dont smash stuff
01:10 AM XXCoder: how much range do you usually use for on the spot plasma height adjusting?
01:10 AM XXCoder: im guessing maybe 2 inches at most
01:11 AM gloops: i dont know its not for me, just a question someone asked on facebook, not a lot i wouldnt have thought
01:11 AM XXCoder: ahh ok
01:11 AM XXCoder: im pretty reasonable sure theres software solution
01:11 AM XXCoder: if not well theres always solution i thought up heh
01:12 AM gloops: i think if you just ran 2 configs, xy and z - just jog the z to height then run the gcode on the xy config
01:12 AM gloops: you still got control of the z
01:12 AM gloops: its like running 2 machines
01:13 AM XXCoder: youre right, its pure xy usually right?
01:13 AM XXCoder: my solution works, just doesnt need any other z. config has no z
01:13 AM gloops: yeah the only movement is xy really, its just fine tuning the z for the cut
01:14 AM gloops: i didnt really understand your solution lol
01:14 AM XXCoder: but you do now? heh
01:14 AM gloops: <XXCoder> not if pure jog one is on its own setup. encoder -> rspi -> stepper thats i
01:15 AM XXCoder: oh basically its this, you have simple computer device that process encoder input from jog wheel
01:15 AM XXCoder: it handles z
01:15 AM XXCoder: and thats it.
01:15 AM XXCoder: it probably has input switches to make sure it dont crash into end
01:15 AM gloops: so that works independent of linuxcnc
01:16 AM XXCoder: yeah
01:16 AM gloops: right i got it, yeah he didnt mention a torch height controller, i think thats probably the same thing
01:16 AM gloops: he did mention
01:18 AM XXCoder: ya. though i wonder if plasma ever need to rise in z for any reason
01:18 AM XXCoder: though can always have m0 (rise z to high position)
01:20 AM gloops: i wonder if its a fine tuning thing, not sure plasma isnt something i do
01:21 AM XXCoder: thats what I thought also
01:21 AM XXCoder: thickness varies a little guy rises lowers as needed
01:21 AM gloops: g-code would always move height over clamps or whatever, dunno
01:22 AM gloops: or his machine bed isnt level lol
01:22 AM XXCoder: i dont think i ever seen plasma use clamps
01:22 AM gloops: nah wouldnt need them
01:54 AM Deejay: moin
05:04 AM Tom_L: morning
05:07 AM jthornton: morning
05:07 AM XXCoder: morning
08:02 AM beachbumpete1: Mornin' ;)
10:06 AM Loetmichel: uuups... i really should mount the new cpu heatsink. The "emergency" boxed HS for an I3 that hangs on one screw isnt ideal for an I7-920 ;) (just had a BSOD while playing Fallout4.)
11:13 AM fragalot: 'sup
11:58 AM roycroft: i'm looking at getting a new, keyless chuck for my mill/drill, which has an r8 spindle
11:58 AM roycroft: all my current chucks are jt33
11:58 AM roycroft: but the jacobs 1/2" chuck with jt33 is $250, and jt2 is $150
11:58 AM roycroft: that's a huge difference
11:58 AM roycroft: is there a downside to getting a jt2 chuck?
11:59 AM roycroft: other than having to get a different spindle adapter, which is going to be way way way less than $100
11:59 AM roycroft: the adapter is about $15
12:00 PM syy__: get the largest possible taper between chuck and shank
12:00 PM syy__: increases stiffness
12:00 PM roycroft: that would be jt33
12:01 PM roycroft: but is it going to be $100 stiffer?
12:01 PM roycroft: i guess that's the real question
12:01 PM syy__: i am not sure if thats 100bucks worth
12:01 PM syy__: ;)
12:01 PM roycroft: keep in mind that this is a mill/drill, not a full size knee mill
12:01 PM syy__: 250for a keyless seems steep for me
12:01 PM syy__: even an albrecht will not cost that much Oo
12:02 PM syy__: wich would be the goldstandard anyway :D
12:02 PM roycroft: that's the going rate for jacobs
12:02 PM roycroft: i can get chinese imports for ~$100
12:03 PM syy__: an albrecht 12mm is 160eur here
12:03 PM roycroft: the cheapest 1/2" albrecht i see is $350
12:03 PM syy__: wtf Oo
12:03 PM roycroft: maybe it's the tariffs that penalize the countries of origin, not the consumers in this country
12:04 PM syy__: haha
12:04 PM syy__: ;)
12:04 PM roycroft: they do that by making the end user pay more, and don't do anything at all to the manufacturer
12:04 PM syy__: i am still not fully clear on the concept of tarifs.
12:04 PM roycroft: pardon my saying this
12:04 PM roycroft: but that is something you and our president have in common
12:04 PM syy__: lol
12:04 PM syy__: hm
12:05 PM syy__: i have an extension
12:05 PM syy__ is now known as syyl
12:05 PM syyl: thats more correct
12:05 PM roycroft: anyway, jacobs are really good chucks
12:05 PM roycroft: i have several keyed ones and i love them
12:05 PM syyl: i know them only for the crapy chucks you get with the cordless drills
12:05 PM syyl: never had a machine chuck from them
12:05 PM syyl: this is röhm/albrecht country ;)
12:06 PM roycroft: the old, rebuildable jacobs chucks are awesome
12:07 PM syyl: thats
12:07 PM roycroft: i guess i can't comment on what they're making now, because i don't have any newish ones
12:07 PM syyl: nice on the albrecht too, you get a rebuild kit for them
12:07 PM syyl: new jaws usualy
12:07 PM roycroft: i won't buy a jacobs chuck if it does not have a rebuild kit number stamped on the side of it
12:08 PM roycroft: there are used albrecht chucks on ebay for what seem to be reasonable prices, but they're mostly auction listings, so i don't know what the final bid will be
12:08 PM roycroft: i should do a bit more research before i buy anything
12:08 PM Loetmichel: *meh* *gross* my wife forgot a opened pack of flour in the kitchen cupboard. Had to get rid of quite the biotope... along with all the foods in said cupboard... what a waste. good thing i always have 5 liters of Isopropanol 99.9% handy... that cupboard is now sterile... and the kitchen a "high explosive area" ;) *cough* *high*
12:09 PM roycroft: flour gets stored in an airtight glass jar
12:09 PM roycroft: how can it be a problem like that? :)
12:10 PM Loetmichel: roycroft: paper pack
12:10 PM Loetmichel: no glass jar/tupperware
12:11 PM Loetmichel: that WAS the problem
12:11 PM roycroft: so it was stored incorrectly
12:11 PM Loetmichel: indeed
12:15 PM Loetmichel: btw: "spritzing" pure IPA into a running vacuum cleaner nozzle (to kill the arachnids and insects sucked in earlier) makes for a nice flamethrower out the other end... just saying ;)
12:20 PM roycroft: put that ipa in your belly, not in the hoover
12:22 PM Loetmichel: roycroft: Isoprlpyl alcohol is toxic. wont do that!
12:23 PM roycroft: ipa is a british ale
12:23 PM roycroft: isopropal alcohol is generally referred to as "rubbing alcohol" or "isopropanol"
12:27 PM Tom_L: https://www.amazon.com/Jacobs-33364-Industrial-Millimeter-Capacity/dp/B001DZDDQO?tag=practforum-20
12:28 PM roycroft: that's a pretty good deal, tom_l
12:28 PM roycroft: now i need to figure out what's wrong with it :)
12:30 PM Tom_L: it's metric. it might not fit your american drills
12:31 PM roycroft: that's ok - i'll just convert them to metric
12:32 PM roycroft: that should not be a big deal
12:32 PM roycroft: i just now converte a 3/8" drill to a 9.53mm drill
12:32 PM roycroft: it only took a couple seconds
12:38 PM rmu: nobody drinks indian pale ale in germany
12:39 PM Loetmichel: rmu: indeed. we like our beer to be brewed by the "reinheitsgebot" ;)
12:40 PM roycroft: still, i can't imagine a german who would prefer to hoover an ipa than drink it
12:42 PM rmu: "to hoover" is like "to google"
12:42 PM Loetmichel: thats why i did that with isoproply alcohol 99.9%, not the beer
12:42 PM Loetmichel: because it kills any insect and aracnide very fast
12:55 PM Rab: roycroft, I've heard very good things about Glacern keyless chucks. They have one in R8 for $150: https://www.glacern.com/drill_chucks
12:56 PM Rab: Doing away with the taper adapter entirely would surely improve stiffness.
12:57 PM Rab: I wanted one for my drill press, but they don't offer JT33. They did respond quickly and politely to my inquiry, though.
12:59 PM roycroft: i would not mind getting a chuck that does not need a taper adapter - i could get one that is r8, but in a way the taper adapter would be nice so that i could use it on the lathe if i want
12:59 PM roycroft: however, i rarely do a lot of tooling changes during a lateh operation
12:59 PM roycroft: not like on the mill
01:00 PM roycroft: so a keyless chuck would not be that big a deal for me on the lathe
01:00 PM roycroft: and i already have tailstock chucks for my lathe that are different from the ones for the mill/drill
01:01 PM roycroft: if it does become a big deal i could always buy another keyless chuck
01:02 PM Rab: I might like to upgrade my mill with their M2 chuck, it's only $90. But I'd have to cut off the tang and thread it for the drawbar.
01:02 PM Rab: MT2
01:11 PM roycroft: i might add the tormach tts system to my mill/drill whenever i do the cnc upgrade
01:12 PM roycroft: which is another reason that a chuck that takes an arbor might be desirable vs. a built-in one
01:12 PM roycroft: i'm probaby not going to buy a new chuck today anyway
01:13 PM CaptHindsight: most IPA's Ive tried will probably kill most insects, at least they tasted that way
01:13 PM roycroft: i'm not a fan of big, hoppy ipas
01:13 PM roycroft: and i'm from oregon
01:13 PM roycroft: even though i don't care for them, i still have to brew one every couple years or so to avoid being kicked out of the state
01:13 PM CaptHindsight: my theory is that there was glut of bad hops that producers had to sell
01:14 PM CaptHindsight: so they pushed IPA's on uhmericans
01:14 PM CaptHindsight: same as burned coffee from charbucks
01:14 PM roycroft: it was a bit less insidious than that
01:14 PM roycroft: the big, hoppy ipa developed as a style here at the beginning of the craft beer movement
01:15 PM roycroft: when we had bud/coors/miller as the "standards"
01:15 PM roycroft: the craft beer folks wanted something big and bold to contrast with the watered-down piss that was american beer at the time
01:15 PM gloops: sounds like an improvement roycroft
01:15 PM roycroft: it was an improvement
01:15 PM CaptHindsight: they figured out that uhmericans don't really know good from bad so they tell them strong flavors are good e.g., bitter, burned, ass etc
01:16 PM roycroft: and i'm not saying i inherently dislike ipa as a beer style
01:16 PM roycroft: i have two problems with them:
01:16 PM roycroft: 1. i got burned out on them in the '80s
01:16 PM roycroft: as i said, i'm from oregon
01:16 PM roycroft: and it was ipa, ipa, or ipa for craft beer choices at the time
01:16 PM roycroft: 2. some of the craft breweries are trying to outdo themselves with over-the-top ipas
01:17 PM roycroft: such that they're not balanced any more
01:17 PM gloops: on the other hand with this craft beer movement, you can end up pay stupid prices for badly made home brew
01:17 PM roycroft: they tend to be very strong, very malty, and very very very hoppy
01:17 PM gloops: £7 for a pint of sediment isnt good
01:17 PM roycroft: i don't need a 75% beer with 170ibus of bitterness for a daily drinker
01:17 PM roycroft: 7.5%
01:18 PM CaptHindsight: new micro brewery opened nearby, they said they just sour their IPA's to make their sours, so all their "sours" are hopped
01:18 PM roycroft: hops and sourness do not balance very well, generally
01:18 PM CaptHindsight: uhmericans here don't seem to care
01:18 PM gloops: i think we lost the happy medium, large scale production of real ale
01:19 PM CaptHindsight: they pretty much drink whatever you tell them to drink
01:19 PM roycroft: we have a fairly sophisticated beer culture here in eugene
01:20 PM gloops: superior to artificially carbonated cats piss, and also overpriced amateur bucket beer
01:21 PM CaptHindsight: http://uneannee.com/ does an amazing job, you'd think they were from Belgium
01:21 PM CaptHindsight: but they are in a rundown strip mall just outside Chicago
01:23 PM CaptHindsight: http://scorchedearthbrewing.com/ great sours, lousy owners, the brewer is like a sour savant
01:24 PM roycroft: so i finally got to test out my new belt grinder last night
01:24 PM CaptHindsight: around here sours are ~$10/12oz
01:24 PM roycroft: i took a chunk of 3/4"x2" hot roll bar stock and put a nice radius on the end in a matter of seconds
01:24 PM roycroft: i pushed really hard and did not slow down the grinder at all
01:25 PM CaptHindsight: how big is the motor
01:25 PM roycroft: the end of the bar turned blue i was pushing so hard
01:25 PM CaptHindsight: ?
01:25 PM roycroft: 3hp
01:25 PM roycroft: i'm happy with it
01:25 PM roycroft: some folks say that for heavy use one should have a 5hp motor
01:25 PM roycroft: but my old grinder has a 1/4hp motor
01:25 PM CaptHindsight: with a gearbox?
01:25 PM roycroft: stepping up to 3hp was pretty big :)
01:25 PM roycroft: no
01:25 PM roycroft: it's direct drive
01:26 PM roycroft: i have a lot of work to do to finish building the grinder, but it's not at a point where i can use it on the rest of the parts
01:26 PM roycroft: and get rid of the old one
01:27 PM roycroft: i originally bought a 2hp motor for it, but upgraded to 3hp before i built it
01:27 PM roycroft: i'm glad i did
01:34 PM JT-Shop: got a photo of it?
01:34 PM roycroft: no, not yet
01:34 PM roycroft: probably not until i paint it
01:35 PM roycroft: my welds are strong but ugly - i don't want to show it off until i clean them up
01:35 PM JT-Shop: lol, more interested in the design and not the pretty parts
01:35 PM roycroft: it's very close to the jeremy schmidt design
01:35 PM roycroft: so look up his 2x72 build on youtube and you'll essentially see what i made
01:35 PM roycroft: i bought his plans and started with that
01:36 PM roycroft: i mainly did things like use shoulder bolts instead of really long hex head bolts
01:37 PM roycroft: https://www.youtube.com/watch?v=a_RlL1O-bK4
01:38 PM roycroft: i really like his design, because the power unit tilts but the table is fixed
01:38 PM JT-Shop: different ends for different jobs?
01:38 PM roycroft: yes, i just have a platen head on it right now
01:38 PM JT-Shop: nice
01:38 PM roycroft: but i'm going to get a small wheel head, and a big contact wheel head
01:39 PM roycroft: and for tables, i'm going to make a fixed 90 degree table, a fixed 45 degree table, and an adjustable table
01:39 PM JT-Shop: nice
01:39 PM roycroft: and jeremy has a clever radiusing table
01:39 PM roycroft: i'll probably build that as well
01:39 PM * JT-Shop gets back to making chips
01:39 PM roycroft: my old grinder has an adjustable table, but that's really fiddly
01:40 PM roycroft: and so often i'm going back and forth between 90 degree grinds and 45 degree grinds
01:40 PM roycroft: it will be nice to just swap tables quickly and know they're accurately indexed
01:54 PM CaptHindsight: https://robotics.sciencemag.org/content/4/29/eaaw3512
01:54 PM CaptHindsight: Dynamic DNA material with emergent locomotion behavior powered by artificial metabolism
02:17 PM JT-Shop: roycroft: that is some neat grinder, be handy to have a chamfer jig on that
02:20 PM roycroft: yes
02:20 PM roycroft: jeremy also just came up with a template jig
02:20 PM roycroft: similar to a router template jig
02:20 PM roycroft: he takes the small wheel attachment and adds an extra bearing to one side of the wheel, so that bearing can follow the template
02:21 PM roycroft: jt-shop: i started planning on building a 2x72 about five years ago
02:21 PM roycroft: almost 3 years ago i started buying parts for it
02:21 PM roycroft: maybe a couple years ago i found the jeremy schmidt design
02:22 PM roycroft: and i knew right away that was the design i was going to use
02:22 PM roycroft: i tossed all the cad drawings i had made up to then
02:23 PM roycroft: having the power train tilt while the table is stationary is such a huge feature
02:23 PM JT-Shop: I'll have to watch some videos during free time
02:24 PM JT-Shop: crap I forgot to make the BP visible to the LAN
02:25 PM CaptHindsight: where are these non temp controlled shops located?
02:25 PM roycroft: i just used mild steel for the first platen, but i got some tempered glass to use as platen liners
02:25 PM CaptHindsight: I either have the heat or the AC on
02:25 PM roycroft: i'll make a glass platen very soon
02:25 PM roycroft: yesterday i just wanted to make sparks to see how well it works
02:26 PM CaptHindsight: we are currently in the 2 weeks before summer arrives where you don't need AC and it's pretty bug free
03:13 PM Rab: http://reboots.g-cipher.net/fridgerail/
03:13 PM Rab: Tiny weekend project.
03:14 PM Tom_L: the compressor will be next.
03:16 PM XXCoder: nice rab
03:17 PM Tom_L: yeah, professional looking repair
03:18 PM gregcnc: dang I've replaced two of those rails
03:18 PM gregcnc: fam managed to break the door rail too, that got fixed with a piece of wood glued in the channel
03:21 PM Rab: You'd think a $1K appliance wouldn't be made of complete garbage...wouldn't you?
03:21 PM XXCoder: That is why "Right to Repair" laws is maiing inroads
04:39 PM Deejay: gn8
04:47 PM net|: https://github.com/tecan/QPrint3D started this project a couple days ago, i almost have sending gcode ready
04:48 PM net|: sends some but not full file
06:13 PM Tom_L: net| have you seen what JT-Shop has been working on in Qt?
06:14 PM Tom_L: his is python not c++
06:15 PM Tom_L: https://qtpyvcp.kcjengr.com/tutorials/index.html
08:20 PM net|: https://www.youtube.com/watch?v=bguXk1SScAc
08:21 PM net|: need a 3d printed version
08:21 PM andypugh: Maybe there is on on Thingiverse :-)
08:25 PM roycroft: my new grinder is so nice, i tell you what
08:26 PM roycroft: even though it's only partially built, and just clamped down on a table for now, it's saving me so much time
08:27 PM andypugh: Belt grinder? Angel Grindr?
08:27 PM roycroft: belt grinder
08:27 PM andypugh: I keep thinking I should get one.
08:27 PM roycroft: i'm making a 2x72, using jeremy schmidt's design
08:27 PM roycroft: it is awesome
08:28 PM andypugh: I do have a hand-held finger sander which gets a lot of use
08:28 PM roycroft: i just had to nip 3/4" off a couple pieces of 3/8" steel at a 45 degree angle
08:29 PM roycroft: normally i'd pull out the bandsaw, pull it upright, mount the vertical table on it, slowly cut the corners off close to the line, then spend a few minutes on the old belt grinder finishing them up
08:29 PM andypugh: The tool I wish I had bought decades ago is the band saw. I got a cheap hand-held one, with a base. But what made it super useful was converting it to a vertical with a table.
08:29 PM roycroft: today i just fired up the new grinder, pushed the pieces in, and ground the whole thing off in seconds
08:29 PM net|: https://www.alibaba.com/product-detail/250ml-330ml-500ml-Empty-Aluminum-Cans_60718970920.html?spm=a2700.7724838.2017115.114.25964571Xbi2wU something strange with the math if i bought these for a penny each and recycled them here i could make a 9 cent profit per can ?
08:29 PM roycroft: i have a 7x12 bandsaw that i mostly use as a horizontal saw
08:29 PM roycroft: but it works as a vertical saw too
08:29 PM roycroft: it's jut really slow for that
08:30 PM andypugh: Ah, yes, what makes mine really useful is not putting it back in the box :-)
08:30 PM roycroft: net| : if you're talking about taking them to a recycle center to get the $0.10 each, what you're missing is that they'll only take cans that have a 10 cent deposit in that state
08:31 PM roycroft: and i doubt the ones from alibaba have deposit stamps on the sides of the cans
08:31 PM andypugh: Though mine will cut 3/8” steel in 20 seconds or so (And I am talking gauge-plate)
08:31 PM net|: oh
08:31 PM * roycroft refers net| to an old seinfeld episode where kramer and newman decided to take some cans to michigan to recycle
08:31 PM roycroft: they had other problems besides the maths :)
08:32 PM roycroft: my only regret, andypugh, is that i did not make this grinder years ago when i first decided i wanted one
08:32 PM roycroft: but on the other hand, the jeremy schmidt design is superior to any others that i've seen, and he only released his design about 3 years ago
08:33 PM roycroft: so i guess it's good that i waited
08:33 PM andypugh: net|: Aren’t they priced at 10c per can?
08:34 PM roycroft: the recycling thing is kind of an issue here
08:34 PM roycroft: california, oregon, and washington used to all have a 5 cent deposit
08:34 PM roycroft: oregon was the first state in the nation with a bottle/can deposit, btw - we instituted it in the late 70s or so
08:34 PM roycroft: anyway
08:35 PM roycroft: all three states have raised the deposit to 10 cents, but asynchronously
08:35 PM roycroft: and in an area like portland, for example, where a significant part of the working population live across the river in washington, stores had to be careful that they were not giving 10 cents back on a 5 cent deposit can from another sgtate
08:47 PM net|: https://www.youtube.com/watch?v=fRoskjv0hlM << lemon juice aluminum etching
09:27 PM net|: andy on alibaba you can get cans for 5 cents. i think if cans wernt worth 10 cents at recycle place alot of people would die
09:28 PM net|: roycroft cans never get looked at unless they are a strange shape if its a can its worth 10 cents here
09:37 PM roycroft: that's not the case here
09:38 PM roycroft: we have automated machines to tabulate bottles/cans, and they scan the bar code on the bottle or can and pay accordingly
09:40 PM roycroft: you really shoud watch that seinfeld episode
09:40 PM roycroft: it's called 'the bottle deposit'
09:40 PM roycroft: you're wanting to do the same thing they tried