#linuxcnc Logs

May 13 2019

#linuxcnc Calendar

12:02 AM XXCoder: gys
12:06 AM XXCoder: whats good brand for portable ac units?
12:06 AM XXCoder: i need to actually sleep well
12:06 AM pink_vampire: ceiling fan
12:06 AM XXCoder: yeah great way to make my head shorter heh
12:06 AM XXCoder: ceiling isnt high enough
12:06 AM pink_vampire: LOL!
12:08 AM XXCoder: unfortunately fans dont get rid of humidity
12:08 AM XXCoder: im apparently very high humidity source as my room can reach 80% in summers
12:08 AM pink_vampire: get dehumidifier
12:10 AM roycroft: we get the 80+% humidity in the winter
12:10 AM roycroft: it gets down in the 20s in the summer
12:11 AM XXCoder: roy this region its always higher humidity un summer. its nightmare for woodcrafters
12:11 AM XXCoder: winter is very dry
12:11 AM roycroft: that's like east coast humidity
12:11 AM XXCoder: it USED to rain quite often in summers
12:13 AM XXCoder: pink_vampire: it have to be drier AND cooler
12:15 AM JesusAlos1 is now known as JesusAlos
01:09 AM XXCoder: hey guys
01:09 AM pink_vampire: hi
01:09 AM XXCoder: I know theres portable ac that has inbuilt water pump to dump water outside
01:09 AM XXCoder: but i cant find any :(
01:10 AM pink_vampire: I have some LG one
01:11 AM pink_vampire: it is very good, but abit noisy
01:11 AM XXCoder: kinda dont care on noise
01:11 AM XXCoder: unless its like earthquake i dont care :)
01:11 AM pink_vampire: LOL
01:12 AM pink_vampire: I'm trying to see what model us that
01:13 AM XXCoder: but does yours pump water out?
01:13 AM pink_vampire: yes and no...
01:15 AM XXCoder: interesting https://www.sylvane.com/blog/american-comfort-portable-acs-now-feature-auto-drain-technology/
01:15 AM pink_vampire: the air that go out is very humid, and i never drained it on normal use, only if it is super hot and very humid
01:15 AM XXCoder: ahh auto evoration type
01:16 AM pink_vampire: LG LP1013WNR
01:19 AM pink_vampire: XXCoder: https://newhaven.craigslist.org/clt/d/milford-large-2-cylinder-steam/6877053026.html
01:20 AM pink_vampire: 1800 for that O_O wow
01:20 AM XXCoder: crazy
01:20 AM XXCoder: may be worth it for someone, but not me
01:21 AM pink_vampire: apparently i need to start making steam engines
01:23 AM XXCoder: cheaper options out there but yeah tend to be bit high
01:23 AM XXCoder: what I want to own is stirling engine
01:24 AM pink_vampire: http://plans-for-everything.com/hen_steam_engine_plans.html
01:24 AM XXCoder: design that can run off heat, OR be driven to make stuff cool
01:24 AM pink_vampire: http://plans-for-everything.com/hen_stirling_engine_plans.html
01:24 AM XXCoder: thats pretty cool
01:25 AM XXCoder: reading hirata one
01:25 AM pink_vampire: http://plans-for-everything.com/downloads/stirling_engines/ST%20CandleEngine.pdf
01:25 AM pink_vampire: this is look very nice to build
01:26 AM XXCoder: basically flamelicker
01:26 AM XXCoder: nice but not what i want. i want design that has 2 sealed cylinders
01:27 AM pink_vampire: ??
01:27 AM XXCoder: http://plans-for-everything.com/downloads/stirling_engines/ST%20HotAirEngine.pdf
01:27 AM XXCoder: never seen that one. very interesting
01:27 AM XXCoder: its "type c" stirling
01:28 AM XXCoder: http://plans-for-everything.com/downloads/stirling_engines/ST%20Jonkman.pdf
01:28 AM XXCoder: very pretty
01:28 AM pink_vampire: page 7, why they solder the crank shaft?
01:28 AM pink_vampire: WOW look amazing
01:29 AM XXCoder: i THINK one i linked to is type b
01:29 AM pink_vampire: what the "type" mean?
01:29 AM XXCoder: this is type A http://plans-for-everything.com/downloads/stirling_engines/ST%20PopSci.pdf
01:29 AM XXCoder: there is 3 kinds of stirling engines
01:29 AM XXCoder: https://en.wikipedia.org/wiki/Stirling_engine
01:30 AM XXCoder: animations on right show a and b
01:30 AM XXCoder: oh yess third type is GAMMA tyoe not c
01:30 AM pink_vampire: https://en.wikipedia.org/wiki/Stirling_engine#/media/File:Philips_Stirling_engine.JPG
01:30 AM pink_vampire: this is sooo cute
01:31 AM XXCoder: its refusing to link direct to picture
01:31 AM XXCoder: is it A or B animation?
01:32 AM XXCoder: https://upload.wikimedia.org/wikipedia/commons/thumb/6/62/Philips_Stirling_engine.JPG/1473px-Philips_Stirling_engine.JPG
01:32 AM XXCoder: is it same picture?
01:32 AM pink_vampire: yes
01:32 AM XXCoder: http://plans-for-everything.com/downloads/stirling_engines/ST%20Solar.pdf this gives you way to generate power
01:33 AM XXCoder: that exact same model, if you use motor to spin it, it will make super super cold end
01:33 AM XXCoder: you can liquidify air if its pumping fast enough
01:33 AM XXCoder: you will also need to really radiate heat away from hot end!
01:35 AM pink_vampire: solar panels are about 15-20% efficient, how much is the starling?
01:35 AM XXCoder: i dont know actually
01:35 AM XXCoder: its not very common unfortunately since you have to aim it
01:36 AM XXCoder: if you want liquid air for fun its a way to have that too lol
01:37 AM XXCoder: https://www.youtube.com/watch?v=4_bGkztd7t0
01:40 AM pink_vampire: ok! this is the coolest thing I saw today
01:40 AM XXCoder: notice that it has huge fan on hot side'
01:42 AM XXCoder: fanastic isnt it
01:42 AM pink_vampire: so this is just a starling?
01:42 AM XXCoder: fancy one but yeah
01:43 AM XXCoder: he have parts of medical lab equipment that makes supercold stuff for stuff
01:44 AM XXCoder: very faint blue liquid, thats oxygen
01:45 AM pink_vampire: but all of the people get it from ebay
01:48 AM pink_vampire: XXCoder: https://www.ebay.com/itm/401153472971
01:49 AM XXCoder: fancy lol
01:52 AM pink_vampire: https://www.ebay.com/itm/183747059579
01:52 AM XXCoder: free piston thats definitely type b
01:52 AM XXCoder: type b is best for supercold air generation apparently
01:53 AM XXCoder: you can build a HUGE room ref with that thing.
01:54 AM pink_vampire: http://www.stirlingultracold.com/lib/sitefiles/pdf/SC-TA04.pdf
01:54 AM pink_vampire: naa, i need something like water bar, but for liquid air
01:54 AM XXCoder: you can distall air yeah
01:55 AM XXCoder: seperate it into oxygen, nirogen, etc
02:02 AM pink_vampire: https://patents.google.com/patent/US4858442A/en?q=cryocooler&oq=cryocooler&page=1
02:02 AM XXCoder: can you make one based on thsoe diagrams?
02:02 AM pink_vampire: no idea
02:02 AM XXCoder: looks like type A?
02:02 AM XXCoder: 2 cylinder
02:02 AM pink_vampire: https://patents.google.com/?q=cryocooler&oq=cryocooler
02:02 AM Deejay: moin
02:02 AM pink_vampire: hi Deejay
02:02 AM XXCoder: hey
03:07 AM selroc: hi Pink
03:07 AM selroc: hello sumpfralle !!!
03:07 AM XXCoder: pink_vampire: kinda curious if you plan to make one now lol
03:12 AM pink_vampire: mm maybe
03:16 AM XXCoder: cool :)
03:25 AM pink_vampire: the tip of the power hacksaw just broke
03:41 AM pink_vampire: what bend saw ave is using?
03:42 AM XXCoder: link video?
03:42 AM pink_vampire: can't find
03:42 AM pink_vampire: but it was something red
03:43 AM pink_vampire: i need good band saw to cut materials fast and square
04:57 AM Tom_L: morning
04:57 AM XXCoder: yo
04:58 AM XXCoder: pink_vampire: https://www.youtube.com/watch?v=-z8u6tvOE2w
04:58 AM XXCoder: thats advange of havign such a big cnc router
05:20 AM x2s: .oO( I'm only a bit jealous )
05:20 AM XXCoder: me too
05:35 AM jthornton: morning
05:36 AM jthornton: wow 48°F
05:36 AM XXCoder: here temp is going down also for a week
05:36 AM XXCoder: thankfully it means I wont need AC... yet
05:36 AM XXCoder: ordered one
05:43 AM jthornton: a window unit?
05:43 AM XXCoder: and portable
05:44 AM XXCoder: *nah
05:55 AM sync: oh wow, when using axis or gmoccapy on a high dpi display everything breaks
05:56 AM XXCoder: https://www.youtube.com/watch?v=ulmmJlhecdQ
05:56 AM XXCoder: new bad obession motorport
05:56 AM XXCoder: they are insane
06:07 AM m123123: test
06:07 AM XXCoder: np
06:07 AM Loetmichel: *wheeeze* maaan thats a lot of work to polish the BMW 525i E39 headlight perspex to a shine again (they were completely blind)... second one just done... Maybe now when the 10W "angle eyes" LEDs arrive and are mounted instead of the yellow halogens its going to be a correct "chav car" :-)
06:07 AM m123123: Hello, anyone here could help me with GCODE?
06:07 AM XXCoder: need more specific question
06:07 AM jthornton: just ask the question
06:08 AM m123123: im writing simple GCODE for loop and i get unkown control command in o word
06:08 AM m123123: i can copy gcode overhere
06:08 AM jthornton: use paste.ubuntu.com
06:08 AM m123123: https://paste.ubuntu.com/p/XKhf6dH27h/
06:09 AM m123123: i just want a LOOP of some simple gcode ..
06:09 AM jthornton: don't combine % with M30 to start
06:09 AM jthornton: just use M2 at the end
06:10 AM m123123: tried to delete and it didnt worked
06:10 AM m123123: ti says about lin12
06:10 AM m123123: line12*
06:10 AM jthornton: I don't see a sub endsub anywhere
06:10 AM jthornton: http://linuxcnc.org/docs/devel/html/gcode/o-code.html
06:11 AM jthornton: try reading that and look at the examples
06:15 AM jthornton: also read about using % http://linuxcnc.org/docs/devel/html/gcode/overview.html#gcode:file-requirements
06:16 AM m123123: so it doesnt work as standard G98 ?
06:16 AM jthornton: what is it?
06:17 AM jthornton: http://linuxcnc.org/docs/devel/html/gcode/g-code.html#gcode:g98-g99
06:17 AM m123123: for calling sub program
06:18 AM m123123: i will try to make new one with o-code link which u gave me
06:18 AM m123123: than i will post it once again
06:18 AM jthornton: LinuxCNC is based on the "standard" but no g98 does not call a subroutine
06:19 AM m123123: ugh i read similar program as i write that it should work
06:19 AM m123123: on some forum when googling
06:19 AM m123123: let me try again
06:19 AM jthornton: always best to just look in the manual
06:19 AM m123123: one thing why should i use M2 not M30 ?
06:20 AM m123123: when i do fusion360 program i always get at the end M30 ?
06:20 AM jthornton: M2 is the normal program end
06:20 AM jthornton: M30 is change pallet
06:20 AM XXCoder: funny because so many machines at work use m30
06:20 AM m123123: o.o interesting
06:21 AM m123123: yeah fusion360 gcodes always ends with M30
06:22 AM jthornton: just because fusion is wrong doesn't make it right
06:23 AM XXCoder: only robos at work end with m2
06:25 AM jthornton: even G0 is different on different controls
06:28 AM m123123: hmm this o code.. could anyone help me here ? i dont get it at all :S
06:29 AM XXCoder: i have never used function define and function call so no idea sorry
06:29 AM m123123: i would like y0 to y70 for 80 times with getting lower and lower z-0.5
06:31 AM jthornton: use repeat
06:31 AM jthornton: o100 repeat [70]
06:34 AM m123123: https://paste.ubuntu.com/p/ZRpRBSWYgK/
06:34 AM m123123: so this should work ?
06:37 AM jthornton: it should run
06:37 AM m123123: i will go try it
06:39 AM XXCoder: is your machine postive downwards?
06:39 AM jthornton: you noticed that too
06:40 AM m123123: it was my mistake, i have corrected it :)
06:40 AM XXCoder: that gcode is pretty strightforward
06:41 AM XXCoder: heh for my work standard that gcode is pretty barebones
06:42 AM XXCoder: no header no comments on where xyz is and what tool
06:42 AM jthornton: yea I have at least where X is as well as tool descriptions
06:43 AM XXCoder: usualy the first thing I do at setup is load program and read it
06:44 AM m123123: Ok it works :) i think this code dont need any comments since its so small
06:44 AM XXCoder: lol ok maybe it is
06:44 AM XXCoder: jthornton: recently I had one very short program that gave me so much trouble
06:44 AM m123123: i would use it longterm on parts where i have to mill big parts to face
06:45 AM XXCoder: setup paper says X and Y is at hole, and Z is ????
06:45 AM XXCoder: yeah.
06:45 AM XXCoder: I had to carefully read gcode to "reverse engineer" where z is
06:45 AM jthornton: what a pain to have to do that
06:46 AM m123123: pain to mill those ?
06:46 AM XXCoder: it takes 5 inch drill thats 1/16 though barely larger hole in steel arm
06:46 AM XXCoder: so getting z wrong may mean cruuuunch
06:46 AM jthornton: yea
06:46 AM m123123: its no t a hole im milling a side of block
06:47 AM XXCoder: it goes very slowly down while at s50 so drill pops itself into hole
06:47 AM m123123: i know its a pain but i need to mill them :(
06:47 AM XXCoder: goes down a inch, then spins up to full speed, then moves down 3 inches, then very slowly drill part
06:47 AM XXCoder: arm is to keep very long drill stabilized
06:48 AM m123123: hmm
06:48 AM m123123: im using face milling tool
06:48 AM XXCoder: steel arm is fixture not part
06:49 AM XXCoder: m123123: I guess youre milling very hard metal?
06:49 AM jthornton: I bet you have some interesting setups from time to time
06:49 AM XXCoder: most setups is fairly boring but some yeah
06:49 AM XXCoder: scary #1 is one where ring thats 2 inches thick gets cut into 5 sections
06:49 AM m123123: yeah its hard :)
06:49 AM m123123: and im not using inches ..
06:49 AM XXCoder: it means endmill thats longer than ring. which goes very deep into fixture unseen
06:50 AM m123123: metric over here
06:50 AM XXCoder: fixture has 5 clamps around ring, and centeral clamp to hold parts
06:50 AM XXCoder: so part is almost completely hidden lol
06:51 AM jthornton: you do that one on a machine with pallets?
06:51 AM m123123: i can comment it with () ?
06:52 AM XXCoder: nah its onlu 4 in diameter part its done on regular
06:52 AM XXCoder: yeah m1
06:52 AM jthornton: m123123: http://linuxcnc.org/docs/devel/html/gcode/overview.html#gcode:comments
06:52 AM XXCoder: thankfully its rare job, maybe less than one job a year of 5 split rings
06:53 AM XXCoder: but comes with what 60 rings or so
06:53 AM XXCoder: so its 2 day job usually
06:53 AM XXCoder: very very hard metal so endmill takes off small bit a time all way down, then 2 tools to do final cleanup
08:17 AM Tom_L: wow, we actually talk about gcode here?
08:22 AM jthornton: lol
08:23 AM jdh: can't edm imstead?
08:23 AM jthornton: speaking of g code I got 19 strawberry seeds to hatch so far out of ~36
09:07 AM jesseg: jthornton, it wasn't those blue strawberries was it?
09:09 AM Loetmichel: Tom_L: we better do... i cant imagine doing stuff like that if i hadnt programmed the machine directly... i dont trust any CAM enogh for that: https://www.youtube.com/watch?v=1Ym4Y9HEm4s
09:12 AM jthornton: jesseg: no, they are red strawberries
09:25 AM jesseg: lol
09:27 AM jesseg: HAHAHA... Ok was kind of wondering why you were so interested in trusting the movements of your machine... then I watched the video.. LOL..
09:29 AM Loetmichel: :-)
09:29 AM Loetmichel: jesseg: i kinda like my fingers ;)
09:29 AM jesseg: yeah I think I'd be tempted to use some sort of hold-down myself
09:33 AM Loetmichel: jesseg: how about that? -> https://www.youtube.com/watch?v=KFBx4fIteIA
09:33 AM Loetmichel: friction fit is nice sometimes ;)
09:35 AM Loetmichel: (boss ordered dell computers without 5.25" holes for a hotswap HDD bay in the front panel... the bay itself was there though
09:35 AM Loetmichel: so i had to improvise ;)
09:39 AM jesseg: I don't know what to say. The fingers are brave. I haven't fully identified the qualities of the brain operating them. :P :P :P
09:40 AM jesseg: I'm off, have a good one
11:38 AM jdh: I do a lot of hand hold down with plastic stuff on router
12:16 PM serp: i, too, like to live dangerously
12:28 PM Valduare: hmm linuxcnc isnt keeping system date accurate
12:31 PM JT-Shop: I doubt that LinuxCNC is in charge of the system clock...
12:33 PM Valduare: well the distro
12:33 PM Valduare: last night it was set right
12:33 PM Valduare: now its 12:30 but system clock reads 7:30
12:34 PM JT-Shop: that's pretty far off for sure
12:37 PM SpeedEvil: exacltly 7 hours off/
12:38 PM JT-Shop: maybe it's in the twilight zone...
12:39 PM Valduare: i should probably move the computer bit further away from my time dilation device?
12:40 PM JT-Shop: or add more shielding
12:40 PM Valduare: shielding is expensive
01:01 PM roycroft: i just ordered a rotary table for my mill/drill
01:01 PM roycroft: i hope i find it useful - i got a 6" one because of the size of the machine
01:02 PM roycroft: i briefly had a 4" one years ago but found it too small to do much of anything with it
01:03 PM Valduare: your just machining too big of items is all :)
01:03 PM roycroft: that too
01:03 PM roycroft: and if i had the room i'd get a bigger machine
01:03 PM roycroft: a bridgeport-class knee mill would be nice
01:04 PM roycroft: but i do not have the space for that, sadly
01:07 PM en1gma: can anyone help me get linuxcnc working on my ubuntu 18.04 amd64 Desktop (laptop)
01:08 PM Rab: I bought a beautiful vintage 7" rotab that was identical to the original manufacturer's option for my mill. So far, I have not used it. From what I've read, a common story (for a home shop anyway).
01:08 PM en1gma: i have an arduino uno r3 and cnc shield ver3 with drv8825 with nema 17 84ozin motors
01:08 PM Rab: en1gma, tried the livecd?
01:09 PM en1gma: https://www.youtube.com/watch?v=mewQ82XwuNE
01:09 PM en1gma: this is what i been doing in ubuntu with arduino ide and sketches
01:09 PM en1gma: Rab i didnt even know there was one
01:09 PM en1gma: can i just install it since i have a full install
01:10 PM Rab: en1gma, you mean install LinuxCNC as software in your existing Ubuntu?
01:10 PM en1gma: yes
01:11 PM Rab: en1gma, I believe that's possible, but complicated since LinuxCNC requires a special real-time kernel. You would need to patch the Ubuntu kernel yourself.
01:15 PM Rab: en1gma, you could just run Grbl on your Arduino for simple g-code motion control. Is there a particular capability of LinuxCNC that you need?
01:15 PM Rab: Nice radio astronomy setup BTW.
01:17 PM Valduare: setting up a new machine today. jog on continuous shoots way past after you let go of the key
01:18 PM Valduare: does not seem consistent some times it shoots way past some times it stops
01:18 PM Valduare: very odd
01:22 PM pcw_mesa: Valduare: If you want jogging to stop when you release the key you need to enable "velocity" mode
01:23 PM en1gma: did you see the video i posted? i basically want to plot (make a map) of the geo stationary sats for now
01:24 PM en1gma: so an absolute mode would be nice
01:24 PM en1gma: i got to go pretty soon but should be back in a few hours
01:29 PM Valduare: pcw_mesa where is that
01:31 PM pcw_mesa: its a motion pin (man motion)
01:36 PM JT-Shop: Valduare: what jog input are you using and what GUI?
01:46 PM Valduare: axis
01:46 PM Valduare: keyboard
01:46 PM JT-Shop: I've seen that happen when the CPU could not keep up with user space things like the keyboard
01:47 PM JT-Shop: D525 IIRC
01:49 PM Valduare: ah ya its an old p4 1 gig of ram
01:49 PM JT-Shop: check to see if it is swapping to disk
01:52 PM Valduare: zero swap
01:52 PM Valduare: used 378 megs of ram
01:54 PM JT-Shop: well at least it's not memory related...
02:20 PM Tom_L: Loetmichel i trust my cam completely
02:22 PM syyl: would be useless if you couldnt ;)
02:23 PM Tom_L: it does exactly what it's told be it right or wrong :)
02:24 PM syyl: that said, i had fairly expensive cam systems glitch on me
02:24 PM syyl: :D
02:24 PM syyl: but thats why we take a close look at the toolpaths befor running it
02:25 PM Tom_L: do you use machining wax?
02:25 PM syyl: no
02:26 PM syyl: but i will take good amount of time looking at solid simulation and the toolpaths in wireframe mode
02:26 PM Tom_L: i do that
02:26 PM syyl: just zooming, paning and rotating around the toolpaths, looking for "odd" things
02:27 PM Tom_L: i double check the Z return levels
02:27 PM syyl: yes
02:27 PM syyl: :D
02:30 PM syyl: that are the things that can get expensive otherwise
02:30 PM syyl: rapid below z0
02:30 PM syyl: brr
03:05 PM ziper: what draft angle can I get away with for FRP molds?
03:09 PM Tom_L: frp?
03:11 PM Tom_L: https://www.protolabs.co.uk/resources/design-tips/improving-part-mouldability-with-draft/
03:11 PM Tom_L: depends
03:27 PM ziper: im going to try for 1.5 degrees
03:45 PM Deejay: gn8
04:01 PM andypugh: ziper: maybe you can use compressed air to extract?
04:01 PM andypugh: (seems to work for boats and crockery)
04:02 PM ziper: i really have no idea how bad it will be
04:02 PM ziper: its a small part
04:03 PM ziper: well, not that small
04:04 PM andypugh: But smaller than a boat?
04:07 PM ziper: yeah
04:07 PM ziper: its about a meter long
04:08 PM ziper: http://puu.sh/DrU1U/2d70169c62.jpg
04:14 PM andypugh: It’s a boomerang with a retrieval cord?
04:14 PM ziper: almost
04:14 PM ziper: daggerboard
04:18 PM andypugh: Woldn’t carbon fibre be more fancy?
04:30 PM ziper: it will be
04:32 PM roycroft: looks like a blade for a brush cutter to me
04:47 PM Joe_Hildreth: OT question: Anyone here very comfortable in Linux? I have a Ubuntu 14.04 server that seems to think it is out of space on the /boot partition. Running a DF -h shows that 54M used, 171M free and when I run DF -i to check on inodes I show 305 used and 62191 free. Any odeas?
04:47 PM Joe_Hildreth: This all started with a kernel update. :-(
04:47 PM andypugh: Do you realy mean 171M free?
04:52 PM ziper: and the mold http://puu.sh/DrV4d/316836c070.jpg
04:52 PM ziper: this will be the first cnc part I have ever made
04:53 PM ziper: I just need to figure out how to make the gcode
04:53 PM andypugh: Which CAD are you using ?
04:54 PM Joe_Hildreth: andypugh: yes the boot partition has 171MB free space. Should be enough to hold a kernel.
04:55 PM Joe_Hildreth: have 3TB free on /
04:55 PM andypugh: I dodn’t even know that there was a separate boot partition, so I suspect I am not the chap to help.
04:56 PM ziper: solidworks
04:56 PM Joe_Hildreth: The server is set up on an LVM, when the OS installed, it have 250ish MB for a boot partition and allocated the rest to /
04:56 PM andypugh: Do you have HSMworks?
04:58 PM ziper: no. is it what you recommend?
04:59 PM andypugh: for solidworks, probably.
05:00 PM andypugh: As I think it is the same as comes with Fusion360 (approximately)
05:00 PM andypugh: personally I would use Inventor HSM, or (more likely) the built-in CAM of Fusion360
05:00 PM ziper: can't i export the model and use it with any cam program?
05:00 PM ziper: ok ill try those thanks
05:00 PM andypugh: Can you use the free version of Fusion>
05:00 PM andypugh: ?
05:00 PM ziper: dont see why not
05:00 PM andypugh: If you can, then I would.
05:02 PM ziper: yeah i'm not making 100k/yr
05:02 PM ziper: .... yet
05:09 PM Tom_L: you can export but it doesn't always export as you may expect it to
05:39 PM elmo40: ziper, do you know what kind of tools you will be using to make that part?
05:39 PM elmo40: looks like a curved surface.
05:39 PM ziper: ball mill
05:39 PM elmo40: and what will the stock material be?
05:39 PM ziper: MDF
05:40 PM elmo40: ah. i see.
05:40 PM elmo40: interesting looking part. what is it for?
05:40 PM ziper: boat daggerboard
05:40 PM elmo40: there is a CAM system in SolidWorks... I only draw in there and export into MasterCam.
05:40 PM ziper: will lay up carbon sindie it
05:41 PM ziper: inside
05:49 PM tiwake: doesn't solidworks have a mastercam plugin?
05:50 PM tiwake: https://www.solidworks.com/partner-product/mastercam-solidworksr
06:50 PM _unreal_: What do you guys think https://www.aliexpress.com/item/BEST-200-W-Mini-Spindle-motor-DC12-48V-ER11-12000rpm-Engraving-milling-grind-Diy-spindle-motor/32738600640.html?spm=a2g0o.cart.99999999.259.493c3c00M5czPK
06:50 PM _unreal_: or
06:51 PM _unreal_: https://www.aliexpress.com/item/Best-engraving-machine-DC-spindle-ER11-200W-high-speed-spindle-rush-air-cooled-PCB-spindle-motor/32798012184.html?spm=2114.10010108.addToCart.2.712351ccq9dxS3&gps-id=pcDetailCartBuyAlsoBuy&scm=1007.12908.99722.0&scm_id=1007.12908.99722.0&scm-url=1007.12908.99722.0&pvid=58ed7cfe-b498-48a7-9ae6-41b4ee4f8e16
07:07 PM andypugh: _unreal_: Neither?
07:07 PM andypugh: Looks like a generic DC motor with a collet adaptor kludged on with a setscrew.
07:08 PM andypugh: Though they are, admittedly, cheap, so you can’t ask much more than that.
07:16 PM _unreal_: ya
07:16 PM _unreal_: and I'm planning on putting it on my tiny home cnc machine
07:16 PM _unreal_: for doing pcbs stuff like that
07:17 PM _unreal_: I'm not sure what the spindle collet difference is?
07:17 PM _unreal_: er11 er16
07:19 PM andypugh: ER11 is smaller than ER16
07:20 PM andypugh: ER11 holds up to 7mm, ER16 up to 10mm
07:22 PM _unreal_: so I'd have to get a collet set then
07:22 PM _unreal_: to do the different sizes
07:31 PM andypugh: Maybe not, as you are likely to only be using 1/8” shank cutters.
07:33 PM CaptHindsight: andypugh: ever use wxPython for windows in LCNC?
07:33 PM CaptHindsight: windows/widgets
07:34 PM andypugh: No, never.
07:36 PM CaptHindsight: https://www.youtube.com/watch?v=FscYq5uCys0 looking back at LCNC for resin printer apps
07:37 PM CaptHindsight: everybody seems to be fine with using closed source resin printer controllers
07:39 PM ziper: is 18k a normal number of lines to have in a program
07:39 PM _unreal_: there just purcahsed a bunch of crap from ali
07:39 PM Tom_L: there is no normal
07:40 PM _unreal_: there is no spoon ether
07:40 PM andypugh: CaptHindsight: Roger makes really nice things
07:40 PM andypugh: Though that printer never did quite what he wanted.
07:40 PM andypugh: (he wanted to make lost-wax castings of miniature engine parts)
07:40 PM ziper: is it abnormal
07:41 PM ziper: how likely am I to crash this machine
07:41 PM Tom_L: depends on the program
07:41 PM Tom_L: if you are cutting a surface you could run thru that many lines a min
07:41 PM andypugh: CaptHindsight: How did you find that LinuxCNC DLP printer?
07:42 PM Tom_L: how fast _can_ linuxcnc read a file and process it?
07:42 PM Tom_L: using the surface as an example
07:43 PM Tom_L: i'm sure that depends on the pc and machine of course
07:43 PM andypugh: I am not sure what happens if you ask for more than 1000 segments per second.
07:44 PM andypugh: LinuxCNC would have to ignore some of them.
07:44 PM Tom_L: or would it just pause
07:47 PM Tom_L: ziper, we've had programs that were several hundred k
07:50 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Skate_truck/Skate_Truck1.jpg
07:50 PM Tom_L: my P1 for that was 56k
07:50 PM Tom_L: i had 5 positions
07:53 PM CaptHindsight: andy left
07:54 PM Tom_L: i see
07:54 PM CaptHindsight: i make a water soluble photopolymer for investment casting
07:54 PM Tom_L: my guess would be that lcnc would pause and wait
07:54 PM CaptHindsight: 1:46am ish in the UK
07:55 PM CaptHindsight: Tom_L: pause and wait is what i have noticed
07:55 PM CaptHindsight: I run galvos with the servo cards pretty quick
07:55 PM Tom_L: i'd imagine a laser could run that fast maybe a plasma
07:56 PM Tom_L: doubtful any mills we use would
07:56 PM CaptHindsight: forget how fast but i did use shorter than usual servo periods
07:56 PM CaptHindsight: forget what the limit is for 7i77
07:58 PM CaptHindsight: spindle on the end of a delta robot
07:58 PM CaptHindsight: cutting styrofoam or similar
07:58 PM Tom_L: you'd have to be using pretty short line segments for that to happen on a mill
07:58 PM CaptHindsight: 100k rpm spindle on something like https://www.youtube.com/watch?v=vN7BPyy69Ds
07:59 PM CaptHindsight: cnc salami slicer picker https://youtu.be/aPTd8XDZOEk?t=62 :)
08:00 PM CaptHindsight: yeah rather than curves
08:00 PM CaptHindsight: all short line segments
08:01 PM CaptHindsight: sounds like a corner the *duino crowd would use
08:08 PM elmo40: _unreal_, the issue with those aliexpress 'spindles' is the runout. doing PCBs needs a tight tolerance spindle spinning a tiny bit. the runout at the tip of the bit could be the entire diameter of the bit itself!
08:10 PM CaptHindsight: but but people want cheap
08:10 PM elmo40: i know they do
08:11 PM elmo40: i deal with those kind of people on a daily basis...
08:11 PM CaptHindsight: they want all their cnc to run on $30 hardware and they don't care if it's closed source if it's free
08:11 PM CaptHindsight: why we can't have anything nice
08:11 PM elmo40: 'why is this italian machine 3x the price of this EXACTLY THE SAME chinese machine???' I respond with: do you want the long answer or short answer?
08:12 PM CaptHindsight: price too much? OK how shitty do you want me to build it?
08:12 PM elmo40: same with 3D printer people. ytube is flooded with 'latest $10 add-on for your printer' garbage.
08:13 PM ziper: so how do I go about making sure I don't mess up this machine
08:14 PM CaptHindsight: 1 year warranty based on use during the evenings and weekends
08:14 PM elmo40: ;-)
08:16 PM elmo40: hobbled extruder gears made with 3d printed parts and yet people complain the quality(or speed) is not good enough... i quit watching 3d printing videos long ago because people expect their $30 printer to run like a cnc machine!
08:17 PM elmo40: 8mm linear rods span over ~300mm and they wonder why the centre of the bed dips. gee, go figure.
08:17 PM CaptHindsight: my favorite is "well it works doesn't it?"
08:17 PM CaptHindsight: not for very long
08:18 PM elmo40: exactly. 3months later it is skipping steps because the linear 'bearings' are all ground up from seized bearing blocks just sliding on them.
08:18 PM CaptHindsight: someone asked for a print using the highest resolution possible today, and they didn't care how long it takes to print
08:19 PM elmo40: i have a 0.2mm nozzle. takes FOREVER to print something! but it is damn fine looking!!
08:19 PM CaptHindsight: I said ~1um using visible light and a few 100nm using 2-photon polymerization
08:20 PM CaptHindsight: they came back and said "10-20 microns is fine"
08:20 PM elmo40: cant be using filament for that...
08:23 PM elmo40: i want a laser based 3d printer. something that uses the powder to make metal and ceramic parts.
08:24 PM _unreal_: elmo40, good times
08:25 PM elmo40: _unreal_, i don't doubt the spindles are 'decent'.
08:25 PM elmo40: problem is there are no listed specs. what is the runout?
08:25 PM elmo40: can you replace the bearings when they fail?
08:25 PM _unreal_: I purchased them already
08:25 PM _unreal_: for a spindle at $15 USD I dont care
08:26 PM _unreal_: besides the cnc machine I have at home is small short
08:26 PM elmo40: if the results are not what you want, then you will care.
08:26 PM _unreal_: My choise is a dremel or a smaller motor like that
08:26 PM elmo40: i take it the speed is controlled by DC voltage input?
08:26 PM elmo40: 12-48V
08:27 PM _unreal_: and I dont dought your right
08:27 PM _unreal_: yes
08:27 PM CaptHindsight: https://imgur.com/ukGDmqf SLS printer
08:28 PM CaptHindsight: 10.5um laser and Mesa analog servo card driving the galvo
08:50 PM CaptHindsight: fdarling: yes
08:51 PM fdarling: CaptHindsight: I have a chinesium 30W YAG galvo head/f-theta lens fiber laser that I'm converting from the Chinesium hardware/firmware over to some German BeagleBone based hardware/firmware/software
08:51 PM fdarling: CaptHindsight: I would be interested in Mesa cards to drive it though, I might like to pick your brain later...
08:52 PM elmo40: i never did like beaglebone.
08:52 PM CaptHindsight: fdarling: analog galvo?
08:52 PM fdarling: I like the concept of PRUs, but beyond that, it's kind of expensive and a PC+FPGA is definitely better
08:52 PM CaptHindsight: 7i77 has 6 analog servo out
08:53 PM CaptHindsight: Mesa has a 4 servo as well, forget the part number
08:53 PM fdarling: CaptHindsight: it is not an analog galvo I don't believe, I believe it's the "XY2-100" digital protocol
08:53 PM fdarling: CaptHindsight: I use Mesa cards on my servo based CNC routers/mills, but I've never used one for a laser setup (yet)
08:54 PM CaptHindsight: haven't written the VHDL for it yet, PCW may beat me to it
08:54 PM CaptHindsight: same thing only galvos move faster
08:54 PM fdarling: CaptHindsight: I can write Verilog, but I never learned VHDL, it seems really verbose. People like it though because the code is more... descriptive, and has nicer features apparently
08:55 PM fdarling: CaptHindsight: would a 1kHz servo thread rate be an issue for a galvo laser? I feel like you'd really need to buffer the output or have the tick rate super high
08:55 PM CaptHindsight: i think mesa has everything in VHDL
08:55 PM fdarling: CaptHindsight: they do. It's unfortunate because I can't easily read the sourcecode
08:55 PM fdarling: CaptHindsight: I really need to break down and learn VHDL one of these days
08:55 PM CaptHindsight: i forget how fast I ran the servo thread using the 7i77
08:56 PM CaptHindsight: few khz at least
08:56 PM fdarling: CaptHindsight: what computer were you using to keep up that speed?
08:56 PM CaptHindsight: galvos only move at a few hundred positions per second full scale
08:57 PM CaptHindsight: the 1-2KHz scan rate is based on ~20-30% moves
08:57 PM CaptHindsight: AMD 2-4 core stuff from a few years ago with RTAI
08:59 PM CaptHindsight: https://i.imgur.com/EAF5oPj.jpg using it for cnc airbrush as well
08:59 PM CaptHindsight: servo motor controlled airbrush and XYZ
09:00 PM CaptHindsight: modulate the air to the brush as well on the fly
09:01 PM CaptHindsight: https://postimg.cc/67Csv2QJ
09:01 PM elmo40: how much is a galvo setup?
09:01 PM CaptHindsight: elmo40: $100 and up
09:01 PM CaptHindsight: depending on type of mirrors, motors, lens etc
09:02 PM CaptHindsight: the one in the pic above was ~$4k
09:02 PM elmo40: for how many Watts?
09:02 PM CaptHindsight: oh you mean laser and galvo?
09:02 PM CaptHindsight: galvo alone was $4k
09:03 PM CaptHindsight: 30W CO2 RF laser is also ~$4k
09:04 PM fdarling: CaptHindsight: I actually have a CO2 laser galvo head I got for $900, it uses the XY2-100 protocol I believe. I don't however have a CO2 laser for it...
09:04 PM fdarling: CaptHindsight: do you need to have a fancy enclosed CO2 laser? Or can a tube-style one work?
09:05 PM _unreal_: gaaaa..... that showed up out of now where
09:05 PM CaptHindsight: fdarling: the lens and mirrors are different for CO2 vs YAG
09:05 PM _unreal_: the DCC
09:05 PM CaptHindsight: fdarling: a chinaco tube will work, just not as long as an RF tube
09:06 PM fdarling: CaptHindsight: yes I know the optics are different for the different wavelengths, but I have a galvo head meant for a CO2 laser, I just *only* have the galvo head...
09:06 PM _unreal_: heh fdarling I just walked into the room. looked at a web page and the DCC menu poped up on me as I was clicking something hehe
09:06 PM fdarling: CaptHindsight: longevity of the laser aside, what about the ability to module it fast enough to do galvo head work? Will the Chinese glass tube one (or perhaps it's power supply?) have trouble with that?
09:07 PM fdarling: _unreal_: I ended up sending you a link instead. Did you look at it?
09:07 PM CaptHindsight: https://www.ebay.com/itm/60W-Co2-Laser-Tube-Glass-Pipe-Water-Cooling-for-Laser-Engraver-Cutter-Machine-/312429140572
09:08 PM CaptHindsight: 60W hah, 30W tube for $160
09:08 PM _unreal_: ya the milling plan with archs
09:11 PM CaptHindsight: https://www.ebay.com/itm/Coherent-GEM-30W-CO2-Laser/173855576833
09:17 PM tiwake: fdarling: I asked one company how often their CO2 lasers needed recharging (I forget which...) they said every 5 years
09:19 PM tiwake: fdarling: you can get a bottle of the CO2 laser mix from your welding supply store
09:19 PM fdarling: CaptHindsight: we have a couple Chinese CO2 lasers at work, I retrofit one with open source hardware (3D printer stuff basically)
09:28 PM elmo40: i bought one of those 2W blue lasers for etching. works well. depending on the cardboard, 4-6 passes and it is cut clean.
09:29 PM elmo40: i haven't a need for cutting anything else. would be cool to cut metals! but i'm building a plasma table for that. ;-)
09:32 PM CaptHindsight: 10,000+ hours
09:32 PM elmo40: until a CO2 'recharge' ?
09:33 PM CaptHindsight: if you get 1-2k hours from a china tube you did well
09:33 PM CaptHindsight: elmo40: for a RF co2 tube yes
09:34 PM elmo40: 1k would last me 5 years... until i turn my hobby into a business, that is.
09:34 PM CaptHindsight: RF tube in the 2nd link ^^
09:34 PM elmo40: the coherent GEM ?
09:34 PM CaptHindsight: yes
09:35 PM CaptHindsight: you can PWM them up to ~20khz
09:36 PM ziper: cutting MDF, do I need to care about conventional vs climb, or can I do it both ways?
09:36 PM elmo40: what about those 100W laser-kit-in-a-box?
09:36 PM elmo40: https://sc01.alicdn.com/kf/HTB1UuLMk1uSBuNjSsziq6zq8pXaB/Cheap-40W-80W-100W-CO2-laser-cutter.jpg
09:36 PM elmo40: climb will give better finish
09:36 PM roycroft: worry more about wearing out your tooling quickly than conventional vs climb :)
09:37 PM elmo40: MDF is 'fuzzy' abrasive material. conventional is a lot of rubbing before the actual cut.
09:38 PM roycroft: i haven't ever cnc'ed mdf
09:38 PM roycroft: but when i use a router/tablesaw/whatever, my motto is push hard and cut fast
09:38 PM elmo40: CaptHindsight, these laser boxes look all fancy. 40 up to 100W systems for under $5k.
09:38 PM roycroft: it starts burning if you hesitate even a little bit
09:38 PM elmo40: exactly!
09:39 PM roycroft: so tell your cnc router to show the mdf who is the boss
09:39 PM roycroft: (the mdf is not the boss)
09:39 PM elmo40: unlike wood, which is not consistent but can handle speed variations better.
09:39 PM ziper: elmo40, that is true, but i'm used to conventional from using a hand router
09:39 PM fdarling: CaptHindsight: did you say you can PWM the Chinese laser up to 20kHz? or the Coherent style one? Or both?
09:39 PM ziper: not that that means anything
09:40 PM roycroft: and seriously, it will dull your tooling fairly quickly
09:40 PM roycroft: and you want your tooling to be super duper sharp
09:40 PM ziper: conventional will, going to slow will, or just cutting mdf will
09:40 PM elmo40: roycroft, i think the correct term is Über sharp ;-)
09:41 PM elmo40: MDF is fiber board. it eats tooling up for breakfast.
09:43 PM elmo40: TiCN coated carbide was our only way of doing it productively.
09:43 PM elmo40: HSS will die, quickly.
09:43 PM ziper: like, a couple hours?
09:44 PM elmo40: [insert-default-reply] "It depends"
09:44 PM elmo40: machining handbooks are simply guidlines.
09:44 PM elmo40: everything is dependent on a million factors...
09:45 PM CaptHindsight: fdarling: just the Coherent RF laser
09:45 PM elmo40: material(of tool and part), depth of cut, machine rigidity, speed, feed, cooling...
09:46 PM elmo40: all these play into tool life, finish quality, production capabilities.
09:46 PM _unreal_: fuck me I just put every one of these diodes in backwards. luckly I didnt start soldering them yet
09:46 PM elmo40: a setup on my machine compared to a setup on your machine may or may not funtion the same. too many variables.
09:47 PM elmo40: nice...
09:47 PM elmo40: the old saying 'measure twice; cut once' will fit into electronics. 'layup check twice; solder once'
09:48 PM elmo40: ziper, one more variable to ruin the "It depends" reply. Price. How much are you willing to spend at each step.
09:49 PM elmo40: that will give you an idea of how much you should expect in return. There is a correlation.
10:54 PM _unreal_: done finally. just finished building the substitute motor controller
10:55 PM _unreal_: with any luck it will work :/
11:21 PM pink_vampire: hi
11:23 PM Tom_L: lo