#linuxcnc Logs

May 22 2020

#linuxcnc Calendar

01:45 AM Deejay: moin
03:17 AM miss0r: my new resevoirs are completed: https://imgur.com/a/3GPSSXA
05:36 AM JT-Cave: morning
05:36 AM XXCoder: yo
06:43 AM Tom_L: morning
06:43 AM Tom_L: soggy one..
06:46 AM XXCoder: was rainy here heh and cold
06:46 AM XXCoder: dipped into 40s f
06:50 AM JT-Cave: chance of rain here for the next forever it looks like
06:51 AM XXCoder: here it have passed into post-rain season, so its 9999% chance of cloudy
06:52 AM XXCoder: then summer begins and we forget what clouds looks like heh
06:52 AM XXCoder: 5 day prediction: today and start of tomorrow partly cloudy, then solid clouds till tuesday night finally partly cloudy again
06:53 AM Tom_L: lotsa lightening in this one
06:59 AM Tom_L: built 2.8 on the rpi yesterday. seems pretty solid to me
06:59 AM XXCoder: awesome. what was latency like?
06:59 AM JT-Cave: nice
06:59 AM Tom_L: ~30k ish iirc
07:00 AM XXCoder: its within range. pretty good
07:01 AM Tom_L: the demo i posted the other day was 2.9 but i don't see any issues with 2.8
09:32 AM enleth: tried turning with PCD inserts for the first time tonight, they make tungsten carbide look like a toy
09:33 AM enleth: technically they are supposed to be used for aluminum but I went ahead with some low carbon steel after checking that it shouldn't outright destroy the insert
09:34 AM enleth: went through the induction hardened outer layer (stock was an old printing press shaft) like it wasn't even there
09:35 AM enleth: made a perfect mirror finish on the first try without looking up feeds&speeds
09:37 AM rmu|w: i think one problem with diamond tooling and steel is that it kind of dissolves the carbon into the steel
09:41 AM enleth: yep
09:43 AM enleth: I'm still probably going to use PCD for finishing operations whenever surface finish is critical
09:45 AM zeeshan_: pcd is amazing on aluminum
09:45 AM zeeshan_: pretty expensive though :)
09:49 AM enleth: zeeshan_: chipped but still perfectly usable inserts are plentiful on ebay
09:49 AM enleth: for a small fraction of the original price
09:53 AM jymmmm: Good morning folks =)
09:53 AM enleth: they're useless for CNC as they no longer repeat so tool room guys save them from the scrap bin and sell them
10:18 AM Tom_L: hi zeeshan_ !
10:20 AM zeeshan_: hi tom
10:20 AM zeeshan_: we're alive!
10:22 AM Tom_L: been stayin busy?
10:22 AM zeeshan_: yes
10:22 AM zeeshan_: remotely working
10:23 AM zeeshan_: how about you
10:24 AM Tom_L: was off a couple months but back at it now
10:24 AM zeeshan_: i had driven all the way to wyoming for a site install and literally asap i got there, i got a call that the border isclosiong
10:24 AM zeeshan_: stayed on site for 2 days and drove right back
10:24 AM Tom_L: i'd taken vacation just prior to the sh** hitting the fan
10:24 AM zeeshan_: lucky!
10:25 AM Tom_L: got there and everything closed so came back and sat at home :)
10:25 AM zeeshan_: oh that's not lucky
10:25 AM zeeshan_: it's okay, all this self isolation stuff is keeping me active with the home projects after work
10:25 AM zeeshan_: since i basically save 2 hours a day from having to commute!
10:26 AM zeeshan_: ive been trying to use my mill as a lathe
10:26 AM Tom_L: and fuel
10:26 AM Tom_L: how's that workin out?
10:27 AM SpeedEvil: "Zeeshan: It works great but I can only cut curves'
10:27 AM zeeshan_: yes, the truck went from 21 miles per gallon to a gallon a month lol
10:27 AM zeeshan_: not good tom
10:28 AM zeeshan_: the g-code output from inventor hsm isn't lining up with what's on the actual machine
10:28 AM Tom_L: git yer lathe goin then
10:28 AM zeeshan_: since the work piece and tool are being confused.
10:29 AM zeeshan_: ive been working on the lathe
10:29 AM zeeshan_: slowly!
10:29 AM zeeshan_: :)
11:25 AM CaptHindsight: zeeshan_: were you working on a big machine that stacked large sheets of something about a year ago?
11:50 AM zeeshan_: yes
12:34 PM Rab: zeeshan_, sup
12:34 PM zeeshan_: how you doiing
12:35 PM zeeshan_: i came here to make sure all the familiar people are around and not affected by the virus
12:35 PM zeeshan_: with the news it sounds like the world ended
12:44 PM Rab: zeeshan_, doing fine. Working remotely on a little machining project that I'm able to do on my mill. But it's driving me crazy not having access to a lathe.
12:45 PM Rab: Also, building another CNC for home since it's driving me crazy not having access to the one I built at my friend's house. ^_^
12:48 PM zeeshan_: rofl, i feel your pain
12:49 PM zeeshan_: i tried for hours yesterday get my post processor to spit out the right code.
12:49 PM zeeshan_: still no go
12:49 PM zeeshan_: i've seen others treat their mill as a lathe before, i wonder how theyre posting code
01:14 PM Tom_L: zeeshan_, we're all tough sobs... aint no virus gonna slow us down
01:14 PM zeeshan_: haha
04:08 PM Deejay: gn8
04:08 PM veegee: What am I missing here? Why can't gasoline be used in the diesel cycle?
04:09 PM veegee: Diesel engines are compression ignition, but only when the fuel injector injects it
04:09 PM veegee: it's not relying on pressurizing and heating an already combustible fuel-air mixture like a compression-ignition gasoline engine
04:09 PM veegee: so there wouldn't be any timing issue
04:10 PM veegee: Then why won't it work if you just inject gasoline or any other fuel? It should all work the same right?
04:10 PM tiwake: gasoline ignites a lot sooner, would need to lower the compression quite a bit
04:10 PM veegee: It's just injecting fuel into very hot air
04:11 PM veegee: why would that matter? Does it inject /before/ the piston reaches top dead center?
04:11 PM veegee: If that's the case, wouldn't adjusting timing solve that problem?
04:11 PM tiwake: what is the compression ratio for diesel engines anyway?
04:12 PM veegee: like 20:1
04:12 PM tiwake: right, gas is half that
04:12 PM tiwake: there is not enough timing adjustment for that
04:12 PM veegee: so it would still work
04:12 PM tiwake: I feel like there would be other issues
04:13 PM veegee: just increase compression until you get it into the range that gasoline auto ignites
04:14 PM veegee: Well Mazda has their HCCI Skyactiv-X thing
04:14 PM veegee: that does compression ignition at certain loads
04:23 PM SpeedEvil: [
04:28 PM FinboySlick: It won't work *well* or for long but I believe you can technically burn gasoline in a diesel engine.
04:34 PM andypugh: It will burn OK, but the lubricity isn’t enough for the pump, so that will die pretty quickly.
04:35 PM andypugh: (Or so I am led to believe, it isn’t an exoeriment that I have done)
04:36 PM FinboySlick: Yeah. I have second hand knowledge of someone getting a diesel engine to start on gasoline but it wasn't put to any use.
04:37 PM * SpeedEvil wonders if project farm has done that yet.
05:12 PM andypugh: I needed a special collet to hold a tap to sharpen it. So I printed one.
05:12 PM andypugh: https://photos.app.goo.gl/g2AdP1FqZLXB5fp28
05:13 PM andypugh: The idea is to grip it by the bottom of the flutes: https://photos.app.goo.gl/BpZ9WQaKYJEbVYfp7
05:14 PM andypugh: syyl: For the D-bit grinder. It looks like it might be a workable idea.
05:14 PM XXCoder: thats cool
05:14 PM XXCoder: it seems to me that 3d printing is more and more handy even in regular metal shop
05:15 PM andypugh: It would have been a very hard collet to make by conventional methods. Maybe CNC wire-eroding?
05:16 PM XXCoder: try to make rotating rings without welding ;)
05:16 PM XXCoder: https://www.thingiverse.com/thing:2922835
05:17 PM andypugh: To be fair, I probably couldn’t make that on my printer,
05:18 PM FinboySlick: andypugh: 3D printed threads were okay?
05:18 PM XXCoder: you probably can if my crap printer did make it
05:18 PM XXCoder: I really want to make this thing https://www.thingiverse.com/thing:3970291
05:18 PM andypugh: Does it print flat with gaps?
05:18 PM XXCoder: once i have working printer i plan to.
05:19 PM XXCoder: yeah theres gaps all way up
05:19 PM andypugh: A lot of the moving-part designs only work with powder-bed printers.
05:19 PM XXCoder: slowly expanding then reverse
05:19 PM XXCoder: youre essentally making all of em at once, but as long as there is proper gap between rings it will work
05:19 PM andypugh: XXCoder: I saw a nice wood and glass version in that YouTube. Looked rarther nice.
05:20 PM XXCoder: looking, didnt see video
05:20 PM XXCoder: oh! hanging thing
05:20 PM XXCoder: was thinking rings one lol
05:21 PM XXCoder: rings is possible with wood, though not one peice. can make "puzzle" and assembly together, then carefully sand off stuff
05:21 PM XXCoder: then use beewax maybe
05:22 PM andypugh: Here is the table.. https://www.youtube.com/watch?v=80uQSWkdevQ
05:23 PM andypugh: This wood trick might be enough to assemble the spinny thing: https://www.youtube.com/watch?v=qO7aFRO5WMw
05:24 PM acer_ is now known as _unreal_
05:24 PM _unreal_: hy01d511b I'm not sure what kind of a RESISTOR I need for the breaking resistor?
05:26 PM XXCoder: maybe? though wood pushing though in dunno if its strong enough
05:27 PM andypugh: Very much a slight “might”
05:28 PM XXCoder: remember inside is sharp since its slice of hollow sphere
05:29 PM andypugh: _unreal_: I have heard of folk using kettle elements or electric hotplates. It rather depends on the job. I have never actually needed one on my toys.
05:33 PM veegee: Hmmm let's say I have an "unlimited" credit card and very good credit
05:33 PM veegee: And no kids or dependants
05:33 PM veegee: Before I die, can I totally crazy max out my credit card and not pay it?
05:34 PM veegee: I mean of course I can, I'm just wondering what they'll try to do
05:35 PM FinboySlick: veegee: They'll probably include that in their request for a bailout from the central bank ;)
05:35 PM FinboySlick: It's just numbers after all.
05:35 PM veegee: Obviously, I'm waiting for the blood amphetamine concentration to rise from my second dose
05:35 PM veegee: hence the random stupid questions s
05:40 PM XXCoder: andypugh: exellent video but too much handcam. cant sub to channel
05:43 PM XXCoder: looks damn cool
05:44 PM XXCoder: smart of him to make it tuneable
05:48 PM zeeshan_: andypugh!
05:49 PM zeeshan_: have you posted code with inventor hsm to turn on a mill
05:50 PM XXCoder: whoa
05:50 PM XXCoder: the zee is here
05:50 PM zeeshan_: xxcoder :D
05:51 PM zeeshan_: ive been gone so long someone stole my nickname
05:51 PM XXCoder: been a while. hows your garage? didnt you get large lathe last I heard?
05:51 PM zeeshan_: :(
05:51 PM zeeshan_: i have it, but its in pieces
05:51 PM zeeshan_: i kind of wish i bought a lathe with linear bearings
05:52 PM zeeshan_: linear bearings are way better than boxways
05:54 PM XXCoder: oh well
06:05 PM FinboySlick: zeeshan_: The guy with a fancy mill who does sinful things to perfectly good RX7 cars?
06:09 PM zeeshan_: rofl
06:12 PM FinboySlick: Good to see you again.
06:16 PM zeeshan_: Good to see you too!
06:20 PM Tom_itx: _unreal_, i thought we covered that yesterday
06:22 PM Tom_itx: FinboySlick, and subarus
06:22 PM Tom_itx is now known as Tom_L
06:27 PM FinboySlick: Tom_L: Well, pretty much anything he does to a Subaru would be an improvement, not a sin.
06:28 PM Tom_L: he blew it up
06:28 PM FinboySlick: Still counts.
06:28 PM Tom_L: no argument here
06:28 PM Tom_L: they use thin ring lands and they cracked
06:29 PM skunkworks: zeeshan_: where have you been?
06:29 PM skunkworks: did i miss something?
06:30 PM zeeshan_: work
06:30 PM zeeshan_: lots of design and travel
06:30 PM XXCoder: fun
06:30 PM XXCoder: wearing a mask hopefully
06:30 PM FinboySlick: Visited Montreal and they just managed to pull him out of that pothole.
06:30 PM zeeshan_: travels are cancelled right now due to covid
06:30 PM XXCoder: i worked 32 hours a week for 4 weeks due to it, then full time again
06:31 PM zeeshan_: postponed would be a better word
06:31 PM XXCoder: i wanted to figure how to move on from machinist job and get more desk job due to back issues, but way wrong timing now :(
06:32 PM skunkworks: zeeshan_: time to think as made me a bit crazy.. https://www.youtube.com/watch?v=c9tWtEG1Exc
06:34 PM zeeshan_: what the hell kind of sorcery is THAT
06:34 PM zeeshan_: wow
06:34 PM zeeshan_: that is pretty impressive
06:34 PM XXCoder: yeah i think he used 3 or 4 chickens in that voodoo
06:34 PM FinboySlick: skunkworks: Showoff :)
06:35 PM zeeshan_: you're syncing the movement in the xy to spindle position?
06:38 PM skunkworks: zeeshan_: yes
06:39 PM zeeshan_: have you tried using your mill as a lathe?
06:39 PM skunkworks: http://electronicsam.com/images/greenmachine/IMG_20200426_112519.jpg
06:39 PM zeeshan_: I'm struggling with it
06:39 PM zeeshan_: your code would be useful for me in making square hole features
06:40 PM XXCoder: skunk thats big step up since last one
06:40 PM skunkworks: zeeshan_: https://youtu.be/PtD9w6lp8n8
06:40 PM zeeshan_: right now i get them laser cut
06:40 PM XXCoder: zee theres still small amount of radius but yeah
06:40 PM zeeshan_: skunkworks you're giving me a headache with your complex shapes
06:40 PM zeeshan_: lol
06:40 PM skunkworks: sorry
06:41 PM zeeshan_: that looks like a multiturn thread
06:41 PM XXCoder: i challenged to make letters but dont look like its not happening heh
06:41 PM skunkworks: The code does 3 to infinity sides.
06:42 PM XXCoder: of course since infinity sides is circle
06:42 PM zeeshan_: now i remember why i love coming to this channel
06:42 PM XXCoder: i want to see 3 sides video actually
06:42 PM skunkworks: sure. That is how I did https://youtu.be/a7CO9gohaXE
06:42 PM andypugh: Did you see the hexagonal spiral?
06:43 PM XXCoder: cut side circle nice!
06:43 PM zeeshan_: the way I approach D holes is with broaching on the mill
06:43 PM zeeshan_: your method is more elegant
06:43 PM XXCoder: skunkworks: how strong material can that work on?
06:44 PM XXCoder: can do steel? stainless? inocoel?
06:44 PM zeeshan_: I don't see it being a limitation on material
06:44 PM zeeshan_: cause you can adjust your feed (your step down toward)
06:44 PM zeeshan_: its like broaching
06:44 PM XXCoder: perfect chip strings with that
06:44 PM zeeshan_: Also the tool can be made to have a smaller cutting edge
06:44 PM XXCoder: very good
06:45 PM zeeshan_: and just predrill a hole
06:45 PM skunkworks: yah - it all depends on spindle torque I suppose.
06:45 PM andypugh: skunkworks: gets perfect control of position and orientation of the hole, hard to do with broaching.
06:46 PM XXCoder: man
06:46 PM XXCoder: very good indeed. i remember your first attempts
06:46 PM XXCoder: that slightly twisted hex heh
06:46 PM skunkworks: (I stole the idea from andypugh)
06:47 PM andypugh: I actually used the same technique to make that tap that I showed in the 3D printed collet.
06:47 PM andypugh: Because taps are not round.
06:47 PM XXCoder: i wonder if inverse is possible
06:47 PM FinboySlick: On the male part, could something similar be achieved with slightly shifting polygonal turning?
06:47 PM XXCoder: making external shape thats hard to do with normal mill
06:48 PM andypugh: XXCoder: https://www.youtube.com/watch?v=PtD9w6lp8n8&t=105s
06:48 PM andypugh: I mean: https://www.youtube.com/watch?v=PtD9w6lp8n8
06:48 PM zeeshan_: ]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]
06:48 PM XXCoder: nice!
06:48 PM FinboySlick: Sort of like they turn hexes, but with an offset synchronized to the Z travel.
06:48 PM XXCoder: also not possoble with mill. constant twist
06:49 PM XXCoder: doesnt that mean you can now make tools?
06:49 PM XXCoder: ie cut it when soft then harden it, then grind sharp edges
06:50 PM andypugh: Yes. https://www.youtube.com/watch?v=TX0MDlRF7gY
06:50 PM XXCoder: man thats crazy
06:50 PM XXCoder: (the ending)
06:50 PM andypugh: XXCoder: That’s me making a tap
06:50 PM XXCoder: oh yeah remember that one too. yea
06:50 PM skunkworks: andy was quicker than me.. I was trying to find his video
06:51 PM andypugh: You can’t
06:51 PM andypugh: It’s unlisted
06:51 PM skunkworks: (my history)
06:51 PM zeeshan_: what are you using that for andy
06:51 PM FinboySlick: andypugh's top secret research projects ;)
06:51 PM andypugh: Also unlisted… What happens when you select the bore cycle and wanted the turn cycle: https://www.youtube.com/watch?v=TjpE2YtFEsk
06:52 PM XXCoder: isnt it fusio erm yeah top secret dunno what it is
06:52 PM XXCoder: ow heh
06:53 PM andypugh: Pretty much wrecked my face driver.
06:53 PM zeeshan_: that's one way to part off a piece
06:53 PM skunkworks: andypugh: was it done enough to be good?
06:53 PM andypugh: That’s it melting the face driver and pinging out. The tap was pretty much undamaged.
06:54 PM andypugh: This sort ot thing: https://www.ebay.co.uk/itm/Speedgrip-4212-114-14211-Madison-Face-Driver/302477837945
06:55 PM skunkworks: ah - that was my next question
06:55 PM andypugh: It lets you machine the entire surface of a part.
06:55 PM skunkworks: ouch
06:55 PM XXCoder: yeah
06:55 PM skunkworks: you cannot replace the parts?
06:55 PM andypugh: I got it really cheap. It was adverised as “lathe tool” and I paid £10
06:56 PM FinboySlick: Ran into this last night for those who like big planers: https://www.youtube.com/watch?v=nCRYiMzOYaM
06:56 PM XXCoder: heh sometimes it simply cannot be fixed. still not as good even if fixed. like facemill, even if its fixed it wont be as good ever
06:56 PM andypugh: That’s a small one
06:57 PM XXCoder: big slab
06:57 PM Thorhian: Man, CAD programs are useful :)
06:57 PM andypugh: These are big ones. Though I suspect “early photoshop” http://www.lathes.co.uk/waldrich-planers/page2.html
06:58 PM XXCoder: no oil drip surpised me
06:58 PM FinboySlick: andypugh: The child labour makes it look more authentic though.
06:58 PM XXCoder: olviously edited, but probably to correct size dunno
06:58 PM zeeshan_: that looks like a slow process
06:59 PM zeeshan_: I keep seeing all these videos about shapers
06:59 PM zeeshan_: drives me insane
06:59 PM zeeshan_: MELT them already!
06:59 PM FinboySlick: That one sitting under the bed is like: "Please sir, can I have some more?"
07:00 PM FinboySlick: I actually love shapers and shapers.
07:00 PM FinboySlick: I mean planers.
07:00 PM andypugh: Planers are the business for making straight things.
07:01 PM andypugh: Though I don’t know how you make a planer without an even bigger planer.
07:01 PM FinboySlick: andypugh: I imagine that with that big a bed on the ways, even if they aren't 100% flat, that's a lot of surface to average out the errors.
07:03 PM andypugh: I was a bit surprised by this video. They do each bed surface with one very wide tool. Not seen that before. It seems to give a great finish too: https://www.youtube.com/watch?v=Ac-FiojtlUU
07:03 PM zeeshan_: They're cool from a mechanical perspective
07:03 PM zeeshan_: but not practical for making $
07:04 PM FinboySlick: andypugh: I wish she made more videos :)
07:04 PM andypugh: The famous quote is “There is nothing you can’t make with a shaper, except a profit”
07:05 PM zeeshan_: https://photos.app.goo.gl/UeWt474Qo8XRm7ay9
07:06 PM zeeshan_: This is what I've been upto at work
07:06 PM zeeshan_: countless hours on big ass 3d models
07:06 PM zeeshan_: poor inventor running on a single core struggles :D
07:06 PM Tom_L: legos?
07:06 PM zeeshan_: it's basically the end of the line on a drywall plant
07:06 PM Tom_L: i knew that :)
07:07 PM zeeshan_: where the drywall gets stacked
07:07 PM FinboySlick: zeeshan_: I buy my cad boxes used. dellrefurbished.ca is your friend.
07:07 PM Tom_L: well the drywall part anyway
07:07 PM zeeshan_: FinboySlick its a work computer
07:07 PM zeeshan_: some fancy computer that still struggles because inventor only uses 1 core
07:07 PM FinboySlick: Oh.
07:08 PM FinboySlick: At that scale, you're getting out of Inventor territory, past Solidworks and into Catia or NX territory, I think.
07:09 PM zeeshan_: I wish they would just make more cores work
07:09 PM zeeshan_: I dont remember the complete specs, but i think it has some i7 processor with 16 cores and a quadro rtx 5000 card
07:09 PM FinboySlick: I honestly thought it was Autocad when I first looked at it.
07:10 PM zeeshan_: haha I like my black background
07:10 PM FinboySlick: I think it's more because of the overlaid wireframe.
07:10 PM zeeshan_: https://photos.app.goo.gl/gQLm61hqhozn4vGS6
07:10 PM andypugh: Scary: I posted that link to Waldrich planers, go to YouTube, and get suggested; https://www.youtube.com/watch?v=HThSfJcrk-g
07:10 PM zeeshan_: i'm proud of this thing
07:10 PM zeeshan_: those pushers adjust for different length boards
07:11 PM XXCoder: wow. my 7 year old source helped someone develop a program https://forums.ldraw.org/thread-23274.html lol
07:11 PM zeeshan_: it's driven by a single motor that drives them in and out in sync
07:11 PM XXCoder: that was a surpise
07:12 PM FinboySlick: zeeshan_: I did some factory design CAD for a paper mill in my youth, it's very rewarding, especially if you get to see it built afterward.
07:12 PM zeeshan_: yes, i like going for site supervision the most and comissioning
07:12 PM zeeshan_: seeing it all come together
07:12 PM zeeshan_: seeing your oversights is always fun :)
07:13 PM FinboySlick: I had to make a machine that took the ends off toilet paper rolls.
07:13 PM Tom_L: gives the engineer a sense of reality
07:13 PM zeeshan_: lately the part that i'm getting involved with a lot of functional safety
07:14 PM zeeshan_: ie not using an e-stop as a safety device (hint its not a safetydevice)
07:14 PM zeeshan_: FinboySlick for what company?
07:14 PM zeeshan_: I hear toilet paper is selling good these days :)
07:14 PM FinboySlick: zeeshan_: Cascades.
07:15 PM zeeshan_: Cool
07:15 PM FinboySlick: I might have a video fo the machine working hidden somewhere.
07:15 PM FinboySlick: Let me look.
07:15 PM zeeshan_: The best part about all the install stuff is
07:16 PM zeeshan_: I've been coming across so much stuff plants want to throw away
07:16 PM zeeshan_: like 5 HP 3 phase motors!
07:16 PM zeeshan_: VFDs
07:16 PM zeeshan_: It's incredible how much stuff they throw away
07:17 PM FinboySlick: Incidently I used inventor over there. But Solidworks is much more suited to my way of working.
07:17 PM zeeshan_: I like boith
07:17 PM zeeshan_: I started with Solidworks for 4 years then have been using inventor now for at least 10 years?
07:17 PM zeeshan_: so just got used to it
07:19 PM zeeshan_: https://photos.app.goo.gl/mVVvHr1z3tcp7v6P9
07:19 PM zeeshan_: They were throwing away this!
07:19 PM zeeshan_: A monster linear bearing
07:19 PM Tom_L: you should start a collection
07:20 PM zeeshan_: I want to build my own lathe with this thing
07:20 PM zeeshan_: It's hard to show scale in a pic, but this thing fits on a 2.5" wide linear rail
07:21 PM zeeshan_: I bet two of them in line would make a beefy Z axis
07:23 PM zeeshan_: https://photos.app.goo.gl/x8w4M5fnnPmbNuT9A
07:23 PM zeeshan_: I love the simplcity of this design
07:24 PM zeeshan_: Linear rails mounted right to a square tube
07:24 PM andypugh: I think someone cant do maths
07:25 PM andypugh: The linear rails seem really out of proportion
07:25 PM zeeshan_: what do you mean
07:26 PM andypugh: Compare with https://pdbengineering.com/pdf/Travelling%20gantry%20machine%20feature.pdf
07:27 PM andypugh: The linear ways seem about the same, but the loads seem different.
07:27 PM zeeshan_: see you're not seeing the whole context :)
07:28 PM andypugh: (I love how that DSG is basically a 6040 gantry scaled up a bit)
07:28 PM zeeshan_: I love those gantry style machining centers
07:28 PM zeeshan_: they're AWESOME
07:29 PM zeeshan_: math doesn't lie
07:30 PM zeeshan_: inputs could be wrong though :)
07:30 PM FinboySlick: zeeshan_: And you can use them as a planer ;)
07:30 PM zeeshan_: FinboySlick sigh, 6 inserts work much better :)
07:30 PM zeeshan_: @andypugh https://photos.app.goo.gl/9yvWxvwNLRSEe7fNA
07:31 PM FinboySlick: zeeshan_: Yeah yeah, and 8 pistons work better than 2 rotors, we all know how you think.
07:31 PM zeeshan_: ROFL got me there.
07:31 PM zeeshan_: The gantry is a simple design for a vacuum pick and place system
07:32 PM skunkworks: have not used it in years http://electronicsam.com/images/shaper.JPG
07:32 PM zeeshan_: linear rails were sized to take an impact at the end of the tool @ full drive torque
07:32 PM andypugh: zeeshan_: Yes, and it all looks quite light, whereas those big linear rails look right for transporting familied of elephants.
07:32 PM skunkworks: but we do have a universal table for it now.. so we don't have to use it for a few more years..
07:33 PM skunkworks: http://electronicsam.com/images/shaper/DSC_8144.JPG
07:33 PM zeeshan_: andypugh i think the proportion on that milling center looks off :)
07:33 PM zeeshan_: I always find that the dynamic life of 20 years is the one that ends up upsizing the bearing
07:33 PM andypugh: So do I. That’s my point. One is wrong. I don’t know which.
07:34 PM zeeshan_: Here is something that will give context - this is where that 65mm wide bearing is used
07:35 PM zeeshan_: Gotta censor the damn pic
07:37 PM zeeshan_: https://photos.app.goo.gl/BecpA7w9w62RYW5SA
07:37 PM zeeshan_: There are 4 of those linear bearings on the back rail
07:38 PM zeeshan_: And you that's designed by the japanese, not a floppy head canadian
07:38 PM zeeshan_: :)
07:38 PM andypugh: It’s a robot torturing device?
07:39 PM zeeshan_: It can be programmed to do so :)
07:40 PM zeeshan_: most systems, those beam come in a 12m and 5.5 segment
07:40 PM zeeshan_: that need to be suspended onto a frame then the linear rails have to be aligned to within .020" in straightness in 2 directions
07:42 PM zeeshan_: that machining center at second glance doesn't look off
07:42 PM zeeshan_: they might be using a lot of bearings?
07:42 PM zeeshan_: I think i see holes for mounting 8 in the left and right axis of travel
07:44 PM andypugh: I would expect that any enineer would have looked at the design and thought “really? Looks wrong” and re-checked their work.
07:45 PM zeeshan_: Depends really on what they're considering an upset condition
07:45 PM zeeshan_: or if they've just sized them for normal operation
07:45 PM FinboySlick: Engineer... You are so old-fashioned Andy. It's all done in the cloud now with machine learning.
07:46 PM zeeshan_: FinboySlick where is the video??
07:46 PM FinboySlick: The whole engineer concept is an outdated concept of the oppressive patriarchy.
07:46 PM FinboySlick: zeeshan_: Couldn't find it :P
07:47 PM FinboySlick: zeeshan_: It's been years, it was never online, though I could fish it out and post it.
07:47 PM zeeshan_: i like seeing different machines work
07:47 PM zeeshan_: get ideas ;D
07:47 PM FinboySlick: zeeshan_: It was pretty nifty.
07:50 PM FinboySlick: https://youtu.be/Z74OfpUbeac?t=288 It's the step they skip between slicing the rolls and packaging them. If you notice the 2" wide reject at the ends, my machine got rid of those.
07:52 PM FinboySlick: When I designed it, it was some sort of fancy trade secret (which we blatantly stole) so maybe they couldn't show it in the how it's made video.
07:53 PM FinboySlick: It was a pair of sliding 'drawbridges' that followed the rolls closely enough that the ends would drop between the bridges.
07:53 PM skunkworks: zeeshan_: the picture probably has location data embeded in it..
07:53 PM skunkworks: :)
07:53 PM zeeshan_: :(
07:54 PM zeeshan_: goddamn GPS
07:54 PM zeeshan_: i always leave it on so i can see where i've been
07:54 PM skunkworks: heh
07:55 PM skunkworks: nothing is safe now..
07:55 PM zeeshan_: FinboySlick that's interesting, i didn't even know there was rejects
07:55 PM FinboySlick: Yeah, the ends of the rolls are always uneven so you want a saw cut on each side.
07:56 PM zeeshan_: Same idea in the drywall industry
07:56 PM FinboySlick: I also designed motor mounts and a bunch of fancy stuff for that plant, it was a great job.
07:56 PM zeeshan_: 8' board is usually 8' .5", they trim 1/4" from each end
07:56 PM zeeshan_: cool
07:56 PM zeeshan_: I've never been in a paper mill before
07:57 PM zeeshan_: but I've heard that there is a lot of automation in there
07:58 PM FinboySlick: zeeshan_: https://youtu.be/FZgQ2UceFF0?t=199 These guys have a different approach, looks simpler.
07:59 PM FinboySlick: Basically, they rely on the normal rolls being too long to twist and fall down, very clever.
07:59 PM FinboySlick: Wish I had thought of that when I designed it ;)
07:59 PM zeeshan_: Is the slicer a rotating blade
07:59 PM zeeshan_: or just a really sharp blade that is shearing?
07:59 PM FinboySlick: Yeah, it was one of the scariest machines I've ever had to work inside off.
08:00 PM zeeshan_: thing is moving too fast to tell
08:00 PM FinboySlick: There were several different kinds.
08:00 PM FinboySlick: The one I worked on was like putting a razor disk on one of those concrete saws, then putting the whole saw on another motor and spinning that around.
08:01 PM zeeshan_: i just slowed the video down
08:01 PM zeeshan_: that's PRETTY cool
08:01 PM zeeshan_: its actually going in complete circles
08:01 PM zeeshan_: not back and forth.
08:03 PM zeeshan_: still trying to figure out how the reject falls
08:03 PM zeeshan_: but not the actual roll
08:03 PM zeeshan_: length?
08:03 PM FinboySlick: Some of them did some sort of eliptical motion, but the one I worked on was just a belt-driven circular saw spinning around.
08:04 PM FinboySlick: Yeah, length. The good rolls are long enough to always have one side in contact with the rail whereas the short ones fall when there is no contact.
08:04 PM FinboySlick: Our design was way over-engineered compared to that.
08:09 PM skunkworks: zeeshan_: the code is in the polygon.comp.
08:09 PM skunkworks: don't judge.
08:09 PM skunkworks: http://electronicsam.com/images/greenmachine/config/
08:09 PM skunkworks: it can also slave the x axis to the radius of the polygon..
08:10 PM skunkworks: http://electronicsam.com/images/greenmachine/IMG_20200318_182620.jpg
08:10 PM skunkworks: so the fillet at the top was a x/z move
08:10 PM zeeshan_: pin in unsigned numsides=3 "Number of sides in the polygon"; just change that to 4 and i can make a square?
08:11 PM skunkworks: or a radius.. http://electronicsam.com/images/greenmachine/IMG_20200314_182353.jpg
08:11 PM skunkworks: yes
08:11 PM zeeshan_: I kind of want to play with it when I get a chance
08:11 PM zeeshan_: I'd have to run it to wrap my head around it
08:12 PM zeeshan_: its not intuitive to me
08:12 PM skunkworks: the configs are there - just a bit geared to my machine..
08:12 PM zeeshan_: son of a.
08:12 PM zeeshan_: in your code I found the solution to my problem likely
08:12 PM zeeshan_: pin in bit lathemode "switches to lathe mode - material spining";
08:13 PM zeeshan_: I need to enable that to lathe on my mill.
08:13 PM FinboySlick: zeeshan_: https://www.youtube.com/watch?v=XruyFqN3gK0 You don't actually see the drawbridge thing but ours was a lot more like this one.
08:15 PM skunkworks: yes
08:16 PM zeeshan_: i guess that also means i need to post process as a lathe
08:17 PM zeeshan_: i think the tormach slantpro post processor will work
08:20 PM zeeshan_: Not sure if i posted this before
08:20 PM zeeshan_: but here the 'end of a drywall plant'
08:20 PM zeeshan_: my area of specialty :)
08:20 PM zeeshan_: https://youtu.be/2nNAS_N8ukY
08:35 PM jesseg: zeeshan_, that's really cool, but what's the blue spot light shining on the floor from the back of the forklift?
08:50 PM ferdna: i am building a cnc... i am having problems choosing a power supply... this are the motors i am using: https://www.ebay.com/itm/FREE-fast-Wantai-1PC-Nema34-Stepper-Motor-1232oz-in-118-MM-14MM-SHAFT/323200909703
08:54 PM SpeedEvil: ferdna: What max RPM do you want?
08:56 PM SpeedEvil: Something like 300W/60V or so is probably about right
08:57 PM SpeedEvil: https://smile.amazon.com/WANTAIJS-1Axis-Stepper-1232Oz-DQ860MA-Breakout/dp/B07H945HD7
09:02 PM SpeedEvil: Lower volts mean lower max RPM
09:16 PM ferdna: SpeedEvil, i wouldnt know what rpm i need...
09:17 PM SpeedEvil: Well, maximum feed rate and feed force tells you that to a degree.
09:17 PM SpeedEvil: If when you multiply feed rate and feed force, and come up with >300W or so, you need bigger motors, for example.
09:18 PM ferdna: SpeedEvil, i have this one: https://www.alliedelec.com/product/mean-well-usa/se-1500-48/70230351/
09:19 PM SpeedEvil: That should be quite adequate to get most, if not all out of those motors, combined with the appropriate driver to limit the current to 5.6(?)A
09:20 PM ferdna: nice
09:20 PM ferdna: so that is all i need then?
09:20 PM ferdna: should I limit exactly to 5.6 or lower?
09:20 PM SpeedEvil: The current limit on the motor is probably good to stick to
09:21 PM ferdna: ohh ok
09:21 PM SpeedEvil: you need 3V (or whatever it said) only if the motor is not turning.
09:21 PM SpeedEvil: It's 3V+ RPM dependant voltage if it is - hence why 60V or so is common
09:22 PM ferdna: SpeedEvil, https://imgur.com/gxarkE0
09:23 PM fleeky: hi there
09:24 PM fleeky: are there any projects out there that sort of generalize the use of stepper motors / servos / relays for making different types of specialized cnc machines?
09:24 PM fleeky: with the primary control protocol being gcode for instance
09:24 PM fleeky: so say you wanted to automate your chop saw
09:25 PM fleeky: you attach a few servos / steppers with threads / a relay maybe for emergency shutoff
09:25 PM fleeky: and then you want to control all this with specific gcode
09:25 PM fleeky: ofc you have to generate the gcode somehow but that would be a seperate matter
09:35 PM dirty_d: not that I know of
09:36 PM dirty_d: I almost started making a gcode parser the other day, but I was like nah, why
09:36 PM dirty_d: covid craziness
09:37 PM skunkworks: fleeky: just look at the hal layer of linuxcnc..
09:37 PM skunkworks: For basic type motion - it might be all you need.
09:44 PM fleeky: skunkworks: neat
09:44 PM fleeky: skunkworks: will do thanks for the tip
10:48 PM veegee: Ok guys, my new industrial unit has a truck loading dock instead of a ramp. This loading dock is a rectangular concrete block in front of the garage door
10:48 PM veegee: I need to convert that to a ramp
10:48 PM veegee: So ideally, just cut it diagonally. It's a solid concrete block. What's the best way to go about this?
10:49 PM veegee: Masonry cutting wheel to cut slots on the surface, then chip away at it with a jackhammer?
10:50 PM veegee: Or just start chipping away and roughing it out with a jackhammer?
10:51 PM Tom_L: drill a few holes in it and add some thermite
10:51 PM veegee: Here's a picture of it: https://photos.app.goo.gl/Y3Z5GzX6Qa7Se7HW6
10:51 PM veegee: I'm being serious
10:51 PM Tom_L: me too :)
10:51 PM Tom_L: somewhat
10:52 PM Tom_L: that's probably not a solid block
10:52 PM Tom_L: it's a sand filled enclosure
10:53 PM veegee: Tom_L hmm you're probably right. Why didn't I think of that
10:54 PM Tom_L: why else would they use block?
10:54 PM veegee: you mean cinder blocks?
10:54 PM Tom_L: yep
10:54 PM veegee: I thought maybe as the outside structure and then pour concrete into the hole
10:54 PM CaptHindsight: the top might be a solid pour
10:55 PM Tom_L: yeah the top is solid maybe 6"
10:55 PM veegee: So a 9" angle grinder with a masonry wheel
10:55 PM veegee: or a big masonry saw
10:55 PM CaptHindsight: try lifting with your forklift
10:55 PM Tom_L: knock a block out and see if sand pours out
10:55 PM Tom_L: you need a ramp anyway....
10:55 PM veegee: That's true, good ideas
10:56 PM veegee: I have a nice rotary hammer. I'll knock a couple of cinder blocks out and try to lift the top plate
10:56 PM veegee: You guys are awesome! Thanks!
10:56 PM CaptHindsight: rent a concrete saw, make some cuts, lift pieces with the forklift
10:56 PM Tom_L: yeah, leave the neighbor's wood pile alone now....
10:57 PM veegee: There's a lawsuit against that guy, he's not allowed to store his wares outside the unit
10:57 PM veegee: So I don't care what happens to his stuff, it's legally not supposed to be there
10:57 PM CaptHindsight: shape charges could split that into 4's
10:58 PM Tom_L: ^^ yeah, may as well have some fun on this project
11:00 PM Tom_L: shame, that concrete doesn't look that old
11:04 PM veegee: It's not, there used to be a ramp there
11:04 PM Tom_L: veegee, you may not be able to lift the plate off. if they did it right, they tied rebar into the cinder block holes and filled em
11:04 PM veegee: But the previous tenant replaced it with that
11:06 PM dirty_d: a shitload of TNT
11:06 PM Tom_L: you suppose the ramp is still inside?
11:07 PM veegee: Tom_L I have no idea, it's a possibility
11:07 PM veegee: But I'll do what you guys suggested and knock a couple of blocks out and try to lift with the forklift
11:08 PM Tom_L: we need at least 3 gopros set up when you do
11:09 PM veegee: I have an A7R3 and like $15,000 worth of lenses
11:09 PM veegee: no gopro though
11:11 PM veegee: According to a random concrete mass calculator, a 15cm plate with about 2.5m x 2.5m is about 2,000kg. /just/ under the rated lifting capacity of my forklift
11:11 PM veegee: I'll have to go take some exact measurements
11:13 PM Tom_L: looks like it may be a fairly steep ramp given the space
11:13 PM veegee: I can extend it later
11:13 PM veegee: For now, my jeep and motorcycle have more than enough clearance to drive in
11:14 PM Tom_L: i was thinking more forklift type things
11:15 PM veegee: I also have a DJI Mavic 2 pro. I can capture everything from the air
11:17 PM zeeshan_: @jesseg it lets people know they're in the blind spot of the fork lift and to watch out
11:35 PM jesseg: LOL cool. I wish my car had that small of a blind spot :D
11:36 PM jesseg: @zeeshan_ ^^^
11:36 PM zeeshan_: lol