#linuxcnc Logs

Nov 12 2018

#linuxcnc Calendar

12:16 AM Crom: Been 2 months since I was able to do anything on my X2 CNC conversion. Still working on my RF-30 conversion, need the X2 to cut some parts.
12:20 AM Crom: RF-30 Harbor Freight 33686 I think is the model.
12:20 AM Crom: Bought the head alignment kit from Bruce Whickham in .AU, very nice. Still working on getting a NEMA34 maybe NEMA42 closed loop for head height.
12:22 AM XXCoder: cool
12:22 AM XXCoder: tony made a interesting 4th axis for his cnc router
12:22 AM Crom: I have the 5HP VFD and a 3HP 3phase motor for the spindle. Just need to wire the 240v as well, also need to wire a 3phase outlet on the front of the benches as well
12:22 AM XXCoder: unfortunately bit of backlash
12:22 AM XXCoder: https://youtu.be/mAZei3wpBe0
12:23 AM Crom: I took 4" rotary table from fleabay and added a NEMA23 closed loop stepper to it
12:27 AM XXCoder: making it a C axis?
12:28 AM CaptHindsight: https://imgur.com/EAF5oPj getting down to ~0.15mm lines, should be up to 1m/sec for lines
12:29 AM XXCoder: painting lines eh. looks decent
12:30 AM CaptHindsight: will be doing full color fills in CMYK with 5-axis
12:33 AM XXCoder: nice
12:33 AM XXCoder: is it mixing sprayer or do you do one color a time?
12:33 AM CaptHindsight: I have to build a brush that mixes at the tip
12:34 AM CaptHindsight: nobody sells one
12:34 AM CaptHindsight: but with off the shelf you can spray CMYK and/or spot colors
12:35 AM CaptHindsight: just have to flush between colors
12:35 AM CaptHindsight: ^^ modified $20 HF airbrush
12:35 AM XXCoder: could just have "home" area where it can spray into paper or something
12:36 AM Crom: https://www.youtube.com/watch?v=nLxJEprRU74 is me building a piece for it.. Thought I had a video of it working...
12:39 AM XXCoder: sigh your video is nearly unwatchable to me, too much movements. but paused and checked it out. looks cool
12:44 AM CaptHindsight: the airbrush will also self calibrate
12:56 AM Crom: Yeah, I need to make a boom and a better clamp for my phone...
12:56 AM XXCoder: that precision guy made huge one that was excessively precise wanna watch the video?
12:56 AM Crom: My tripod legs have troubles locking... I need a new tripod
12:58 AM XXCoder: https://www.youtube.com/watch?v=LWUHlyi-8Mc found it
12:59 AM XXCoder: basically he saw some other guy in youtube complain about weak indictor arm used as camera hold
12:59 AM XXCoder: so he made this wayyyy overkill one
12:59 AM XXCoder: in preview picture you can see how large it is.
12:59 AM XXCoder: looks rigid enough to be actually used as indictor arm.
01:02 AM XXCoder: as he is robrenz he ground balls for it also. high precision balls
01:37 AM XXCoder: you should watch it tho, the ball grinding is very interesting
01:37 AM XXCoder: he uses lathe with special tool, uses grinding gel and later sandpaper to ensure roundness
01:37 AM XXCoder: very unfortunate for me that its not even autocaptioned.
01:38 AM XXCoder: grinding starts at approx 21 minutes
01:38 AM Crom: I would never be grinding my own balls, unless I was making a set of Screwy balls, but I'd just buy them from Chuck
01:39 AM Crom: Since I also don't have a surface grinder.
01:39 AM XXCoder: he dont use suirface grinder
01:39 AM XXCoder: he uses a lathe lol
01:40 AM Crom: Just trying to get my X2 all working pretty and the 33686 (RF-30) as well
01:47 AM miss0r: mornin'
01:47 AM XXCoder: hey
01:47 AM miss0r: So; whats new? :)
01:47 AM XXCoder: you
01:48 AM CaptHindsight: hah Milling Machine Restoration, Overhaul and Base Build
01:48 AM miss0r: lets call me new old news :)
01:48 AM XXCoder: lol
01:48 AM CaptHindsight: not a second was spent on squaring anything
01:48 AM CaptHindsight: https://www.youtube.com/watch?v=oJKQkokqWu8
01:49 AM miss0r: looking at the desgin; I don't think squaring would help anyway ;)
01:49 AM XXCoder: I really need to square mine, I was still doing electrics tests and test milling when I moved and lost room to do anything with it.
01:49 AM CaptHindsight: wut, but itsah round post drill press!
01:50 AM XXCoder: next 2 videos is not about it
01:51 AM XXCoder: so I guess he either squared it off screen or it still arent
01:51 AM CaptHindsight: miss0r: nuttin much just been squirtin ink with CNC
01:51 AM XXCoder: miss0r: yep he turned his mill into inkjet
01:51 AM miss0r: huhmm.. What was the idea about that wooden plug they hammered into the bottom of the column? they didn't even fill it with epoxy afterwards.
01:51 AM miss0r: :-o
01:53 AM miss0r: friday I made a cool temporary repair on a pretty sizeable 5-axis mill
01:53 AM XXCoder: used nails to fix one of ballscrews? ;0
01:54 AM miss0r: It has three stages when it comes to the tool status of the main spindle: Clamped with tool, clamped without tool & unclamped. The way it determines this status, is by measuring the oilflow from the cylinder doing the releasing. so, all three stages are determined from pulses from a oil flow meter.
01:55 AM miss0r: after the refurb of the head, the values had changed minutely, which made it unable to differ between clamped with tool & clamped without tool
01:56 AM miss0r: this is controlled by a PLC seprate to the heidenhein controller. It has a 4bit digital bus, it uses to talk to the main controller with.
01:56 AM XXCoder: wow
01:57 AM miss0r: so; as I didn't have either software or the proprietary cable needed for the PLC doing so, I had to do some 'creative problem solving' :)
01:57 AM miss0r: So, I added a PLC(temporarily, mind you) inbetween the oil flow meter & the digital input on the PLC.
01:58 AM miss0r: I know the amount of pulses it actualy sends from either state, so I made the PLC relay the pulses and add more pulses or remove pulses if needed, to fall within the original tolerances. :) Worked like a charm
01:59 AM miss0r: Now I am just waiting for the proprietary cable & software to be delievered here, so I can go back and update the tolerances in the existing PLC. :)
01:59 AM XXCoder: nice. gonna keep machine running!
01:59 AM XXCoder: some places machine stopped one day would cost thousand bucks or more
02:00 AM miss0r: I had to figure out something to make it work on the spot; the machine had been down for repair for two weeks, and they had a 3 shifts 24hour/day plan for the entire weekend, as they were pretty far behind :)
02:01 AM miss0r: But it is a realy nice machine :D I think the table is 6meters long in X direction + a 1750mm roundtable on the end. Probally 2meters of y travel and 4 meters of z travel
02:01 AM CaptHindsight: https://imgur.com/gallery/8mzM9T7
02:01 AM miss0r: The head can rotate on two axis ect.. crazy machine :D
02:01 AM miss0r: :D I love stuff like that CaptHindsight
02:02 AM * miss0r needs to do some mill tramming now. Something is slightly off
02:03 AM XXCoder: dang! thats insane
02:03 AM XXCoder: https://i.imgur.com/azX2rj9.mp4 indeed
02:04 AM miss0r: When you are doing a 80mm wide cut on aluminium, it doesn't take alot for it to show on the surface, if you are even slightly out of tram
02:07 AM Deejay: moin
02:08 AM miss0r: 'ello
02:08 AM XXCoder: miss0r: yeah if its slightly off tram, you can feel where facemill overlaps are
02:09 AM miss0r: Indeed. What is happending right now.
02:10 AM XXCoder: im just browsing internet
02:10 AM miss0r: And it takes a little too much work with scotch brite to remove the tool marks
02:10 AM miss0r: That will not fly
02:27 AM miss0r: hmm... I am only have ~0.007mm out of tram over 380mm X... Then Y must be what is wrong
02:28 AM XXCoder: 7 thou off mm off? that is pretty good
02:29 AM miss0r: Y axis is bad
02:29 AM miss0r: 0.06mm over 300mm
02:30 AM XXCoder: comparately huge
02:30 AM miss0r: and this sucks more... because I don't have a "nod" ajustment in the head. This means I have to shim the table...
02:30 AM miss0r: fak!
02:31 AM miss0r: not realy a huge numer, no. But plenty big to leave marks
02:31 AM miss0r: number*
02:32 AM miss0r: if you haven't already seen This old tonys last video: https://www.youtube.com/watch?v=mAZei3wpBe0
02:33 AM XXCoder: ya saw
02:33 AM XXCoder: pretty cool but it has problem with backlash
02:33 AM miss0r: No spoilers :) I just clicked it :D
02:34 AM XXCoder: no problem
02:40 AM miss0r: his ninja chops always cracks me up :)
02:40 AM XXCoder: indeed
02:42 AM miss0r: Welding on those parts AFTER doing the bearing fits almost gives me a heartburn
02:47 AM CaptHindsight: when we were kids if we had done that it would have been a beating and no machining for a week
02:48 AM miss0r: heheh yeah
02:48 AM XXCoder: lol
02:54 AM XXCoder: crazy. https://www.youtube.com/watch?v=2IuzTlzddV8
02:54 AM XXCoder: expecially with lathe with bar of metal
02:59 AM miss0r: this old tony needs a brake on that spindle if he wants to use it as an indexing head
03:00 AM XXCoder: spindle or the 4th axis?
03:00 AM miss0r: okay.. that was 27 minuts of procrastination... Back to the tramming :)
03:00 AM XXCoder: it can be spindle too but yeah
03:00 AM miss0r: the 4th axis/spindle
03:00 AM XXCoder: ya did you see the backlash on it?
03:01 AM miss0r: yeah
03:01 AM miss0r: That will not fly for milling
03:01 AM XXCoder: how would it be removed I wonder
03:01 AM miss0r: a brake
03:01 AM XXCoder: oh locks in place so cant move
03:01 AM XXCoder: makes sense
03:01 AM miss0r: most 4th axis spindles/workpiece holders have a brake in'em
03:01 AM miss0r: atleast the industrial ones
03:02 AM miss0r: alright, enough skipping work. My boss will freak out any moment, I need to get back to it
03:03 AM XXCoder: lol later
03:51 AM rmu: pcw_home: i noticed the 7i90 firmware(s) don't contain the dpll module, are the FPGAs too small?
04:25 AM miss0r: alright. Got the tram within 0.01 on the y-axis as well. I hope this will do the trick :)
04:25 AM XXCoder: thats closer than before but couldnt get closer?
04:27 AM miss0r: Not with my combination of shimstock anyway
04:27 AM miss0r: its less than 0.01.. but the dial indicator I used on this axis for comfort is only a 0.01 dial, so, saying 0.007-8 ish, would just be a guess
04:28 AM miss0r: but a little less than 0.01 anyway
04:29 AM miss0r: but hey.. Its a 1985 cnc - *some* inacuracy is to be expected :)
04:30 AM XXCoder: yeah
04:31 AM miss0r: I just hope it is 'good enough' so i can remove the tool marks without too much work, that is the goal anyway
04:35 AM XXCoder: indeed
04:36 AM XXCoder: its worth couple hours of adjustment to take 2 or 3 minutes off blending
04:36 AM XXCoder: because you make far more parts than adjusting
04:37 AM miss0r: Indeed
04:44 AM miss0r: alright; vise is not squared up beyound reason. Time to do the test cuts
04:57 AM jthornton: morning
04:59 AM XXCoder: hey jthornton
05:05 AM jthornton: dang another dip in the temperatures here
05:05 AM jthornton: did you ever make any sense out of vismach?
05:05 AM XXCoder: not really its bit harder for me to analyze stuff when under weather
05:06 AM XXCoder: I certainlyu dont look forward to work tomorrow lol
05:06 AM jthornton: work starts on Monday night?
05:06 AM XXCoder: yeah
05:07 AM jthornton: I hate being sick too, been a long time since I was sick knock on wood
05:08 AM XXCoder: im suck each other week it seems
05:08 AM XXCoder: my body have easy time fighting dieases but it doesnt do well on protecting from being sick in first place lol
05:11 AM miss0r: XXCoder: Damnit. It didn't completely fix it
05:12 AM XXCoder: drat
05:12 AM XXCoder: some more tramming?
05:12 AM miss0r: Measuring, I get a difference of 0.006-7mm over the overlap
05:12 AM miss0r: I'm beginning to suspect the ram is sagging
05:12 AM XXCoder: is that measurable?
05:13 AM miss0r: Yeah, but it is something that takes alot of setup time
05:13 AM XXCoder: I might have idea, if you use indictor arm you touch side of spindle with it, have it cut something see if it twists
05:13 AM XXCoder: but vobration would kill it
05:13 AM miss0r: hmm. Interresting; I'm not sure cutting forces are at work here.
05:13 AM miss0r: that would be a whole new can of worms
05:14 AM XXCoder: yeah
05:14 AM XXCoder: any way to test it in stressed mode?
05:14 AM miss0r: i.e. the surface is unchanged from a 2mm doc to a 0.125mm doc
05:14 AM miss0r: Theres always the monkey test
05:14 AM XXCoder: finish a surface, blue it, see how much spring cut it does
05:15 AM XXCoder: since spring cut is MUCH less stress
05:15 AM miss0r: not a half bad idea
05:15 AM miss0r: blueing it up.
05:19 AM miss0r: pattern is clear now
05:19 AM XXCoder: yeah? whats happening with it?
05:20 AM miss0r: I had to lower Z by 0.001mm
05:21 AM XXCoder: in order to touch blue?
05:21 AM miss0r: https://imgur.com/a/r6wK56M
05:22 AM miss0r: It was scimming the blue too lightly, for me to see it :)
05:22 AM miss0r: then I lowered it 0.001mm and took a full width pass
05:22 AM miss0r: out of tram.
05:22 AM miss0r: I just need to figure out where the hell this is all comming from
05:23 AM XXCoder: is tram changed since last test?
05:23 AM XXCoder: might be something loose if its changing
05:23 AM miss0r: Yeah. I will do some other measurements before tramming again :D
05:23 AM miss0r: I have to completely remove setup & clean everything. That takes a while
05:24 AM miss0r: I want to exhaust other options first
05:24 AM XXCoder: lot of fun oh well
05:24 AM XXCoder: indeed
05:24 AM miss0r: not *that* fun :)
05:24 AM XXCoder: heh my 'fun' part was sarastic
05:24 AM miss0r: the mill you saw was a mess there. It was *CLEAN* two surface passes ago :D
05:24 AM miss0r: I know I know
05:25 AM XXCoder: :)
05:25 AM miss0r: This part is due soon. I think I will just scrub it with the facemill, and do a surface path with a 10mm carbide endmill for this part. Then I will figure out what is wrong afterwards
05:26 AM miss0r: shouldn't be more than a few 1/1000mm difference with a 10mm endmill
05:26 AM miss0r: if that atall
05:28 AM XXCoder: cool. clients furst always
05:29 AM miss0r: even though it is annoying the hell out of me :D That is just the way it is
05:29 AM XXCoder: yeah
05:30 AM Tom_L: 29F, Hi 30, Lo 17
05:31 AM XXCoder: 49f 39f here
05:32 AM Tom_L: jthornton, looks like you could get some of this
05:32 AM XXCoder: votex missing me lol yay but same time aww no snow
05:32 AM XXCoder: it warms to low 50s with sometimes rain here whole week
05:32 AM jthornton: yea the temps will fall today here down to 28°F tonight
05:33 AM Tom_L: just enough to have to scrape the windows here
05:33 AM Tom_L: maybe 2"
05:34 AM XXCoder: snow hates this region
05:50 AM miss0r: acording to this string with a knot at each end marking the length, this part is to spec
05:50 AM XXCoder: lol
05:53 AM miss0r: Precision QC is no laughing matter! :D
06:02 AM XXCoder: most imprecise thing I used to do qc was tape measure
06:02 AM XXCoder: I used it since part were 3 feet long and I wanted to see if it was within reasonable size before irreverable removing ut
06:02 AM XXCoder: it was good
06:04 AM miss0r: :]
06:04 AM miss0r: if I have to measure above 300mm, I am forced to use a caliber. If larger than 500, I am also down to tape measurements :D
06:05 AM miss0r: but; as my mill X travel is only 530, which hardly allows me to make anything larger than 500 mm - I'm good :)
06:06 AM miss0r: I wouldn't mind owning a REALY large cnc mill. A high precision one. That thing would most likely take in some realy cool orders
06:06 AM pcw_home: rmu: the 7I90 has room for a DPLL in most configs, I mainly have used DPLL in ethernet configs since Ethernet tends to have higher transfer jitter
06:07 AM XXCoder: miss0r: large as in what workspace volume?
06:07 AM miss0r: XXCoder: Right now I am cursing myself for not having had the time to complete the linuxcnc retrofit. Transfer rate with this serial connection is killing me :D
06:08 AM pcw_home: But the RPI SPI interface also has pretty bad jitter so I should probably add the DPLL to the SPI configs
06:08 AM miss0r: hmm.. 8-10meters of X travel, 6-8meters of Y travel.. and perhaps 2meters of Z travel
06:08 AM miss0r: brb, I have to go break some endmills on this part
06:09 AM XXCoder: lol that IS large
06:13 AM miss0r: I've done repairs on a few of'em. They realy speak to me :D
06:14 AM XXCoder: its so tough to fit such a large machine
06:15 AM miss0r: then comes the tool changer, the control cabinets.. the external hydraulics and lubrication system ect. It takes up a small warehouse
06:16 AM miss0r: the word ludacris comes to mind
06:17 AM XXCoder: then,.. whole cell
06:17 AM gregcnc: not something you just buy at auction without asking the wife first
06:17 AM XXCoder: 2 horzional mills, 2 part workstation, computer center, and pallet system
06:17 AM miss0r: yeah
06:18 AM miss0r: gregcnc: I hardly dare folding the toilet paper double without asking her, so no
06:18 AM MarcelineVQ: mill yourself a house
06:18 AM miss0r: I've always wanted a solid stainless steel house. All square corners, no bullshit :D
06:19 AM miss0r: do damage when the foundation starts slipping in one end. The house will go as a whole! no cracks ect. :D
06:20 AM * miss0r starts dreaming with a 1000yard stare
06:20 AM MarcelineVQ: yeah just let it tilt whent he foundation goes
06:20 AM MarcelineVQ: pour a new epoxy floor on the inside and let it self-level
06:21 AM miss0r: good plan. This needs to be considered when building it from the start. higher roof levels, to allow for future alignments :D
06:21 AM gregcnc: incase you weren't redneck enough https://www.walmart.com/ip/Set-of-10-Red-and-Green-Remington-Shotgun-Shell-Christmas-Lights-Green-Wire/23862653
06:21 AM MarcelineVQ: yes, I'll draw up the business papers
06:21 AM miss0r: hanging a picture? forget about the drillhammer. break out the drill & tap set
06:22 AM MarcelineVQ: miss0r you silly goose, you can just put magnet strips on the frame
06:22 AM miss0r: MarcelineVQ: I was realy planning to use 316...
06:22 AM MarcelineVQ: you're not using non-magnetic stainless are you? were not made of money
06:22 AM MarcelineVQ: wait, I have a plan
06:23 AM MarcelineVQ: copper-wire siding
06:23 AM MarcelineVQ: magnetic house
06:23 AM miss0r: gregcnc: I could probally get arrested for having something that even looks like shells :D (this is Denmark)
06:24 AM miss0r: hehe; need popcorn? no problem! Just place lidded bowl on living room floor, and crank up the magnetic field momentarily, problem solved !
06:24 AM gregcnc: here we fire two shots in the air when we hear a noise outside
06:24 AM miss0r: I envy that
06:25 AM miss0r: I hardly fired a gun since I was in the army.
06:30 AM miss0r: I did some competition pistol shooting a few years back, which was fun. but I just didn't find it fun enough to fit it into my calendar.
06:32 AM gregcnc: I have a busy week ahead. several one of lathe parts, one with a broached slot i'm hoping someone comes through with a reasonable quote for so I don't have to make it.
06:33 AM miss0r: :D I'll do it.
06:33 AM miss0r: But with the shipping, you are most likely far worse off ;)
06:36 AM jthornton: I need to get the wind blocking done for the run
06:38 AM jthornton: got one done yesterday and installed... came out pretty good a 1 1/2" x 3/4" frame pocket screwed together with some 8 mill plastic stapled on it
06:45 AM miss0r: Picture or it didn't happen ;)
06:47 AM jthornton: I'll get some after I get the louver vent installed in the new coop
06:48 AM miss0r: :]
06:50 AM jthornton: http://gnipsel.com/images/chickens/12x16-coop/louvers-01.jpg
06:50 AM miss0r: Looking good. Nice work
06:51 AM XXCoder: indeed
06:52 AM jthornton: hmm I thought I had a photo of the finished product but can't find it... painted barn red with metal screen on the inside covered with 1/2" x 1/2" welded wire hardware cloth just to keep sneaky weasels out
06:53 AM miss0r: nice
07:09 AM miss0r: I realy realy need a new coolant pump. This one does not deliever enough pressure for me to clear chips properly
07:09 AM miss0r: a more better one
07:09 AM XXCoder: betterer'
07:10 AM miss0r: Thats the one :D
07:10 AM miss0r: I have waay too little flow
07:16 AM jthornton: I pissed around with 3 coolant pumps until I found a good one and learned a lot about pumps in the process lol
07:40 AM XXCoder: bah! wish linuxcnc post changelog
07:44 AM miss0r: I just cut myself on a damn alu insert...
07:44 AM miss0r: Those things are razor sharp :)
07:50 AM gregcnc: Yeah that's no fun..
07:50 AM miss0r: There, outer dimensions for part 1/4 is done now. This is alot more work than I thought. :) Again I think my boss is going to make me work late
07:51 AM gregcnc: then again, if you work late, the boss might have a bottle of whiskey waiting
07:52 AM miss0r: nah - he is cheap
07:53 AM miss0r: So, that'll never happen :)
07:53 AM miss0r: gregcnc: incase this is going over your hear; i'm selfemployed
07:53 AM XXCoder: salary or hourly
07:53 AM miss0r: hear=head*
07:53 AM XXCoder: doh forgot
07:54 AM gregcnc: I know it, that's why I expected the finest whiskey
07:54 AM miss0r: lol
07:54 AM miss0r: I do enjoy a good whiskey.. :)
07:55 AM miss0r: But most days, when I've put the kid to bed & i'm done doing what needs to be done in the house, I mostly just go to bed.. if I don't have more work to do
07:55 AM miss0r: but when this is done, sure. I will have a glass of whiskey :D
07:56 AM gregcnc: see your boss isn't that bad
07:56 AM miss0r: hehe
07:56 AM miss0r: He will give me the whiskey, but he will not like it, nor look happy while doing it :P
07:58 AM miss0r: Speaking of kids. I need to get going. See you around
07:58 AM XXCoder: later
07:58 AM gregcnc: i already fed mine and took them to school
07:59 AM weenerdog: i sold mine to the circus
08:19 AM skunkworks: huh - just had to fsck my ssd...
08:21 AM skunkworks: went to send an email and I had lost write access to the drive. rebooted into initramfs
08:21 AM -!- #linuxcnc mode set to +v by ChanServ
08:21 AM cradek_ is now known as cradek
08:21 AM skunkworks: cradek: morning!
08:21 AM cradek: skunkworks: make sure SMART is turned on and being checked
08:21 AM cradek: hi!
08:28 AM skunkworks: sure - first time I have had issues witha ssd - -
08:29 AM sync: ssd failure is usually sudden and fatal :/
08:32 AM SpeedEvil: Just one bit changes SSD to SAD.
08:32 AM SpeedEvil: (I have not looked up the ASCII table, and suspect that is strictly incorrect)
08:32 AM cradek: yeah I've had several just suddenly brick
08:32 AM cradek: the bios doesn't even see them afterward
08:33 AM cradek: but it's been several years since I had that routinely happening
08:33 AM MarcelineVQ: if you're luck you get SMART warnings from the bios ahead of time
08:34 AM MarcelineVQ: I wouldn't buy anything but samsung ssd's these days, as far as longevity goes
08:34 AM MarcelineVQ: evo or pro or one of those lines
08:35 AM SpeedEvil: Back the fuck up.
08:35 AM SpeedEvil: If you care about data.
08:46 AM skunkworks: that is what this is - samsung evo
08:46 AM skunkworks: 1tb
08:46 AM skunkworks: what smart tools do you use?
08:47 AM cradek: linux has smartmontools, in debian I've had to turn on start_smartd=yes in /etc/default/smartmontools
08:47 AM cradek: it checks things periodically and sends an email if something is wonky
09:05 AM FinboySlick: Intel has some pretty high-longevity SSDs in their pro series but they're *very* expensive.
09:05 AM FinboySlick: (for write-heavy workloads)
09:11 AM weenerdog: i aint had the balls or money to go ssd
09:12 AM weenerdog: but the stuff i do doesn't require uber hot performance
09:14 AM skunkworks: https://pastebin.com/Q7cDVUtV
09:15 AM MarcelineVQ: weenerdog: after having an ssd even just rebooting a computer becomes a life-changing experience
09:15 AM FinboySlick: weenerdog: They're probably the most significant upgrade one can do to a computer.
09:16 AM weenerdog: heh i have my coffeemaker exactly located so i can go reload in the time it takes to reboot
09:18 AM weenerdog: plus i live in the middle of nowhere and pay $50/month for 1 megabit lol. i assure you i am patient.
09:19 AM skunkworks: sounds like my parents
09:19 AM MarcelineVQ: its your time, but I'm happy with mostly not having to wait for applicatins to open
09:19 AM weenerdog: any application i open is gonna be open for hours and hours. i'm just not sure i see the payoff (for me)
09:19 AM MarcelineVQ: I ​mean, I love wasting time, but waiting is awful
09:20 AM weenerdog: so whats the winning toolchain on linux for modeling nurbs surfaces -> gcode?
09:20 AM MarcelineVQ: many/most applications access the disk all the time, browsers for instance use plenty of different disk caches, each of those little actions sped up makes a difference
09:21 AM weenerdog: yeah prolly
09:21 AM skunkworks: ssd's are amazing
09:22 AM skunkworks: http://electronicsam.com/images/KandT/testing/primus/Cad.png
09:24 AM weenerdog: freecad -> foozion?
09:25 AM weenerdog: then emc or whatever its called now to turn the cranks?
09:56 AM skunkworks: the ssd seems fine
10:04 AM FinboySlick: Anyone here played with solvespace?
10:13 AM weenerdog: i've not. it looks cool as hell
10:14 AM FinboySlick: Doesn't seem so good for complex shapes though.
10:16 AM weenerdog: dunno. what are you trying to make?
10:17 AM weenerdog: i've always done my 3d with autocad and rhino when i need to nurbs. parametric is kinda new to me. new same old thing lol
10:20 AM * fragalot finally got a blast cabinet & one of those 3-in-1 sheet metal shear / bend / roller things
10:21 AM fragalot: should have gotten these things much sooner
10:21 AM fragalot: also, I have now *REALLY* run out of space, ol
10:22 AM weenerdog: my girlfriend is used to crazy things showing up in the living room and dining room.
10:22 AM flyback is now known as eatadick
10:22 AM FinboySlick: weenerdog: Oh I haven't tried to do anything specific. Was just reading the forums and there's no parametric way to do a spiral, for example.
10:23 AM eatadick is now known as flyback
10:24 AM fragalot: flyback: got muted somewhere? :P
10:29 AM weenerdog: i dunno FinboySlick. maybe its not added yet. looks like a pretty good work in progress
10:30 AM weenerdog: maybe they're adding more commonly useful things first. if you're cnc machining your own bolts you're doing some seriously mad scientist shit
10:30 AM FinboySlick: weenerdog: Yeah. Side-effect of not just doing a front-end to OpenCASCADE.
10:31 AM FinboySlick: weenerdog: Nah. I'm just keen to find an open-source CAD package that isn't dragging the 20 year old OpenCASCADE engine along.
10:32 AM rmu: last release of solvespace was in 2016-12
10:32 AM weenerdog: hm
10:32 AM MarcelineVQ: last edit to its git repo was 2 days ago
10:34 AM rmu: if some real development is happening, it is not happening here https://github.com/solvespace/solvespace, most recent commits are janitorial
10:34 AM FinboySlick: There are some very complex problems to fix to have anything complete. Just think of doing fillets on a model's edges. Writing code that does that and works well is pretty tricky.
10:34 AM weenerdog: i dont care if my gcode comes from hamsters chiseling my parts while reading ancient sumerian cuneiform if my part looks spiffy :)
10:35 AM FinboySlick: weenerdog: I enjoy doing parametric CAD, even if it never gets to an actual part. I just wish I didn't have to encourage the likes of Autodesk to do it.
10:35 AM skunkworks: I have been corupted by acad.. parametric cad learning has been slow for me
10:36 AM FinboySlick: skunkworks: I started 3d modelling with things like Lightwave so parametric was quite a revelation for me back in the day.
10:36 AM weenerdog: it is kinda nice and unexpected for autodick to make fusion 360 free for mad scientists. i'd love to not use it. but its so sweet and syrupy
10:36 AM weenerdog: FinboySlick, have you messed with blender or rhino?
10:37 AM FinboySlick: Blender is fun, but it's not really for accurate modelling. I love to play with the game engine though. It's been ages since I played with Rhino but it was pretty awesome.
10:38 AM mozmck: What is wrong with OpenCASCADE?
10:38 AM rmu: hehe. many many many things.
10:39 AM weenerdog: rhino is fuckin bangin for some stuff.
10:39 AM FinboySlick: It's very powerful, but it's also ancient and very very complex.
10:40 AM rmu: opencascade doesn't like close parallel surfaces
10:41 AM rmu: and i always seem to encounter new chamfering bugs
10:41 AM flyback: fagalot, no where
10:42 AM flyback: :P
10:42 AM rmu: some operations can leave solids with a hole in the surface
10:43 AM mozmck: Is that with FreeCAD?
10:44 AM flyback: must bite canucks
10:44 AM gloops: you can make precise models in blender without much effort, although that doesnt make it the part makers choice of course
10:45 AM weenerdog: it aint the kitchen... its the cook :)
10:46 AM rmu: mozmck: yes
10:46 AM mozmck: rmu: so do you know if the problem is opencascade - or freecad?
10:48 AM rmu: yes, those problems i mentioned are OCC problems
10:48 AM skunkworks: yah - that is why I have been searching for my perfect laptop that will do video passthrough so fusion runs fast enough to be usable.
10:48 AM skunkworks: you can't beat the cam part of fusion
10:48 AM rmu: the only thing freecad could do is detect those problematic situations and refuse to do the operation
10:49 AM mozmck: So is there an opensource alternative to opencascade? I suspect the reason it is complex is that 3d cad is complex!
10:50 AM sync: skunkworks: you can beat it pretty easily, any cam package that can do constant scallop height beats it
10:50 AM skunkworks: sync: free?
10:52 AM rmu: fusion is not free
10:53 AM gregcnc: they changed the pricing structure last month, but i thought hobbyist is still free
10:53 AM weenerdog: it is
10:54 AM skunkworks: so far it is.
10:54 AM skunkworks: if that changes - who knows./.
10:55 AM gregcnc: it will sooner or later
10:55 AM gregcnc: i've had a free copy for several years, but I basically don't use it
10:56 AM skunkworks: of the two - I have probably drawn more in freecad...
10:57 AM skunkworks: but that was to 2d print.. no real toolpath generation
10:57 AM gregcnc: I did try recently to get toolpaths for 3d milling on a C axis, but couldn't get the tool to stay on spindle center, ie no y axis
10:57 AM skunkworks: *3d print
10:59 AM rmu: i would probably use fusion if it was available for linux, but dealing with windows just for fusion is a no-go
11:02 AM skunkworks: right. I still need windows for my day job... So - I deal
11:02 AM pcw_home: rmu: did you see my note about DPLL on the 7I90?
11:04 AM rmu: pcw_home: yes thanks. with SPI there should be no transfer jitter so DPLL doesn't gain much, is that rightß
11:04 AM pcw_home: Well, it does have a lot of jitter so probably DPLL would help
11:05 AM pcw_home: not sure if its the SPI driver or just RPI but if I monitor the read time it has a couple 100 usec of jitter
11:06 AM rmu: read time is duration of the read operation?
11:07 AM rmu: no
11:10 AM pcw_home: yes basically (halcmd show param *.tmax is useful here)
11:11 AM rmu: you mean jitter in duration from one read operation to next
11:13 AM rmu: a couple 100 usec would be O(servo period)
11:18 AM skunkworks: heh - debian stretch boots on surface pro
11:18 AM skunkworks: latenyc is about 300us
11:20 AM gloops: fusion was free 2 months ago when i got it, have had an email from Sandra with a price list though
11:22 AM rmu: gloops: it may be free as in "doesn't cost anything at the moment" for some users, but that is not really free.
11:23 AM gloops: pretty obvious that ALL your activity with fusion and sketchup is monitored, i think if you trigger the 'pretty active' alarm, they will take a look at your free status
11:24 AM gloops: you are allowed to use it so long as youre earning under 100k per annum, if youre drawing numerous commercial parts a day that might be questioned - but then if that was your status, you wouldnt mind paying
11:26 AM rmu: i dont like the subscription model, nothing prevents adesk to increase price 5-fold after locking in enough users
11:27 AM MarcelineVQ: That's not particularly worth their time gloops, a couple commercial users more than offset many small players doing what they want. it's in their interest to increase bug testers and word of mouth, that's why there's a free liscence
11:36 AM skunkworks: I hope buy the time fusion becomes unfree - freecad will be up to snuff :)
11:36 AM gloops: maybe MarcelineVQ but i think there is a line to be drawn with free use
11:37 AM weenerdog: if you have enough sense to do cnc, you have enough sense to adapt if autodick changes things on us :P
11:38 AM gregcnc: lol https://www.shutterstock.com/image-photo/engineer-using-drill-factory-290850938?src=GSMSB2IelUCQM580qK6rrQ-2-24
11:38 AM weenerdog: i'm giving freecad a whirl
11:39 AM rmu: even is adapting was no problem, losing a library of designs might be
11:39 AM mozmck: gregcnc: that should be renamed: "model posing with milling machine"
11:40 AM weenerdog: thats an important consideration, rmu
11:40 AM gregcnc: there are a bunch like that, when models pretend to be machinists
11:40 AM rmu: hehe
11:41 AM weenerdog: cnc stuntcock?
11:41 AM rmu: "if it smells like chicken, you are holding it [soldering iron] wrong"
11:41 AM weenerdog: lol
11:42 AM fragalot: related. https://imgur.com/gallery/Nw4Ye3C
11:43 AM gloops: i like freecad but its no good for wood really
11:43 AM gregcnc: fragalot https://imgur.com/gallery/vh5pBlX
11:44 AM fragalot: That cat has seen things
11:44 AM gloops: someone posted a photo of a frog just at the moment it made the leap to hyper-space earlier
11:44 AM gloops: lucky shot
11:57 AM skunkworks: http://electronicsam.com/images/greenmachine/20181112_115352.jpg
11:57 AM skunkworks: no real way to get in or out of it...
12:22 PM Lcvette: paging pcw_home pcw_mesa
12:23 PM Lcvette: quick question about mesa cards for an application beyond my knowledge (old school stuff
12:23 PM * Lcvette uploaded an image: rhino control.png (291KB) < https://matrix.org/_matrix/media/v1/download/matrix.org/JlZBbqhcSRJkMEzsOZhfLNFB >
12:23 PM Lcvette: trying to determine what i might need to retrofit this little machine
12:23 PM Lcvette: this is a description of its existing control
12:24 PM Lcvette: would like to see if i could reuse the existing servos/amplifiers or if not what i could replace as little as possible
12:24 PM Lcvette: if you have a card or cards to work with them
12:31 PM gregcnc: rhino? that little yellow lathe
12:35 PM Lcvette: yup
12:35 PM norias: oi
12:36 PM norias: soooo much reading
12:36 PM gregcnc: I asked about PWM drives a while back and was told it's no problem for Mesa
12:36 PM norias: gregcnc: that's my understanding, as well
12:44 PM * Lcvette uploaded an image: Rhino ST8 CNC Lathe 1.png (932KB) < https://matrix.org/_matrix/media/v1/download/matrix.org/vPBPlpzPCfAnqeHPxeaYSaYz >
12:44 PM Lcvette: thats good news
12:45 PM Lcvette: I am just trying to figure out if its just a 7i77 or something more specificly specialized i need to grab to do the retrofit to retain the existing amplifiers and what not
12:45 PM norias: i'm still working on my "mini-mill" design
12:45 PM norias: i think it will be a multi-year effort
12:45 PM norias: my key assumption is that new strategies like trochodial milling
12:46 PM norias: can enable better performance of small milling machines
12:46 PM norias: so, i'm starting at calculating average and max cutting forces in those scenarios
12:46 PM norias: so I can translate it to require machine / spindle stiffness
12:47 PM norias: and motor requirements
12:47 PM norias: etc
12:47 PM gregcnc: Where did you find that Rhino? there aren't very many
12:48 PM Lcvette: i set a notification on ebay
12:48 PM Lcvette: it dinged and i grabbed it..lol
12:48 PM Lcvette: always wanted one of these little machines
12:48 PM Lcvette: learned on one in college back in the early 90's
12:48 PM pcw_mesa: Lcvette:Probably a daughtercard like the 7I85S would do (4 PWM/DIR pairs, 4 encoder inputs)
12:48 PM TurBoss: nice!
12:48 PM norias: Lcvette: what do you like about it?
12:49 PM gregcnc: cool, there was a small dynamite lathe recently too 500USD BIN, needed spindle motor
12:49 PM Lcvette: i know i missed that one last saturday it was also on my radar
12:49 PM Lcvette: was kicking myself!
12:49 PM Lcvette: pcw_mesa, thats awesome!
12:49 PM gregcnc: If this was closer I'd consider it. https://www.ebay.com/itm/192717042463
12:51 PM pcw_mesa: you would still need something else for GPIO (either a sserial card line a 7I84 or a cheap parallel port BOB)
12:51 PM Lcvette: 7i84 and 7i85S
12:54 PM Lcvette: out of stock 😞 7i85s
12:54 PM pcw_mesa: they are being built as we should have them within a week or so
12:55 PM Lcvette: sweet!
12:56 PM Lcvette: so 5i25, 7i84, 7i85s?
12:58 PM pcw_mesa: or 7i92 7i85S 7I84
01:00 PM gloops: these always fetch a surprising amount - would be easy to make https://www.ebay.co.uk/itm/Lathe-Grinding-Attachment-Toolpost-Grinder-240V-Motor/283252594146?
01:01 PM gregcnc: starting making them>>>> profit
01:02 PM gloops: yeah i think you could make profit on something like that
01:03 PM Tom_L: don't tell china or they'll cut your throat on it
01:04 PM gregcnc: that's why people pay money
01:05 PM gregcnc: Thea smallest toolpost grinder Dumore makes is 1150USD, next one up is 2k.
01:05 PM gloops: be ok till someone grinds his thumb off then sues you
01:06 PM gloops: ive seen some ingenious home made ones, with slides and tilt etc
01:07 PM gloops: my own is more primitive https://www.youtube.com/watch?v=PeicWgTGCLU
01:09 PM Lcvette: how is the latency on the 7i92 with a nuc?
01:09 PM Lcvette: is that an option?
01:31 PM fragalot: miss0r: fun fact: the stop button on the schaublin can fail in such a way that it doesn't actually stop the machine.. good job they've got another, and there are like 5 other ways to stop it, but guess what i'm doing tomorrow? :D
01:34 PM MarcelineVQ: having a pizza party?
01:34 PM fragalot: no that was today
01:34 PM MarcelineVQ: Be sure to save some for after your fun times tomorrow :O
01:34 PM fragalot: always
01:34 PM fragalot: it's the breakfast of men.
01:35 PM gloops: i know someone on a challenge to eat only pizza for 1 month
01:35 PM MarcelineVQ: cold? right out of the fridge?
01:35 PM gloops: he doesnt look very well
01:35 PM fragalot: MarcelineVQ: that is an option; however if you've got a grill, why not fire that thing up?
01:35 PM MarcelineVQ: just means he ate shitty pizza, you can get a complete meal into a pizza pretty easily :>
01:36 PM fragalot: gloops: but pizza counts as a vegetable
01:36 PM fragalot: according to US congress
01:38 PM gloops: probably more vegetable matter than animal
01:43 PM fragalot: holy crap
01:43 PM fragalot: the 3 in 1 sheet metal machine thing I got.. they just emailed me the perfectly translated dutch manual as a PDF
01:44 PM fragalot: I think that this is a first where there's a manual that hasn't been translated by someone's cousin that knows a guy that speaks the language
01:51 PM SpeedEvil: :)
01:53 PM gloops: only thing is, its for a toaster lol
01:57 PM cnomad: quick question -- I'm trying to use a limit switch as a home switch, linuxcnc appears to support it and I want to verify my config before testing it
01:57 PM cnomad: so:
01:57 PM cnomad: net limit-x-min => axis.0.home-sw-in
01:57 PM CaptHindsight: https://i.imgur.com/etyfb3z.mp4 hazards of poor g-code
01:58 PM cnomad: ^ should assign the limit-x-min switch to a virtual "home switch" -- is that correct?
01:58 PM gloops: i see Stan Lee has died
01:58 PM fragalot: I literally just watched the burp baby one, CaptHindsight
01:58 PM fragalot: https://imgur.com/gallery/LzcAsX5
01:58 PM cnomad: the something like this in the INI:
01:58 PM cnomad: HOME = 1.00
01:58 PM CaptHindsight: yeah fun stuff
01:58 PM cnomad: HOME_OFFSET = 0.00
01:58 PM cnomad: HOME_IGNORE_LIMITS = YES
01:58 PM cnomad: HOME_USE_INDEX = NO
01:58 PM cnomad: HOME_SEQUENCE = 0
01:59 PM cnomad: and HOME_SEARCH_VEL + HOME_LATCH_VEL set to 0.5 (so axis can assume there IS a home switch, simultaneously ignore the limit switch signal while homing to avoid tripping the 'emergency off' while homing)
02:00 PM gloops: you want this switch to be both home and limit?
02:00 PM cnomad: don't have much of a choice, but yes
02:01 PM cnomad: This is for a Z, so home would be bottom + 1mm
02:01 PM fragalot: just to know.. why are you homing Z down?
02:02 PM cnomad: is there a convention to home it up? to be specific, this is a Z stage for microscopy, so I can arbitrarily set the focus on the microscope head as well
02:03 PM fragalot: convention is to home up as that's an "always safe" direction
02:03 PM fragalot: homing down could crash into whatever is on the table.. not sure if that applies to microscopes
02:03 PM cnomad: It'll crash upwards due to the body / design on the stage
02:03 PM cnomad: *of
02:03 PM fragalot: if in your case homing down is safer, then carry on :)
02:04 PM cnomad: maybe, there might be something I'm missing, too. The Z stage has a manual knob, if I turn it all the way up -- it stops hard
02:05 PM cnomad: the knob appears directly attached to the stepper shaft
02:05 PM gloops: i havent done a home/limit switch tbh, but it is an option in the stepconfig wizard, if you ran a sample config and checked home/limit for a switch youll get the ini and hal code
02:06 PM cnomad: (looking more, there's a spring attached to the top of the Z stage. maybe the mode of failure while crashing up is preferable to crashing down...)
02:06 PM cnomad: ah, ok, I'll run the config then and get a sample output
02:07 PM cnomad: thanks! I've been fiddling with the INI / hal directly so far
02:09 PM gloops: just remember if you run stepcofig on your machine file, it will overwrite any changes you have painstakingly made
02:09 PM cnomad: yep, just generated one with a different name :)
02:09 PM cnomad: also -- backups. yay
02:16 PM cnomad: OK, seems like my config matches the homing paramters generated by stepconf when I set an input to "homing+ min limit". time to test
02:16 PM cnomad: I slowed down my search / latch vel for what it's worth
02:16 PM fragalot: always good when testing :)
02:17 PM gloops: yeah, youll probably play with that a bit when its running
02:19 PM cnomad: huh. it homes up and passes the limit switch. good thing i slowed it down!
02:19 PM gloops: im pretty careful where i park the gantry when im done - gets very tedious waiting it for it to crawl from the far end to home the next day
02:19 PM fragalot: cnomad: invert the homing direction
02:20 PM fragalot: and you DID tell it to "ignore limits"
02:20 PM gloops: you mean it just sails past the switch, or passes it while homing?
02:20 PM cnomad: fragalot: yep
02:20 PM cnomad: gloops: yeah this seems to be a matter of homing direction and ignore the limit switch, but that top limit switch isn't assigned as a home switch, so....
02:21 PM gloops: it needs to back off the other way
02:21 PM cnomad: you mean the overshoot part of the homing routine?
02:24 PM gloops: well it finds the switch then backs off to come in slowly for an accurate latch
02:24 PM gloops: how do you change the direction now, latch velocity maybe
02:24 PM gloops: i cant remember - not got linuxcnc here with me
02:24 PM cnomad: according to a forum post, the homing direction is just a matter of negating the home search velocity.is it possible to home up, then down, if the bottom limit switch is already hit?
02:25 PM cnomad: so say limit switch triggered, and that's the switch assigned as a home switch as well
02:25 PM cnomad: when i tell axis to home, it should ignore the limit switch in-as-far as not shutting down... but it should also know not to continue in that direction
02:26 PM cnomad: ah, so perhaps that's what the latch vel is for?
02:27 PM gloops: latch velocity is the final search for the switch speed
02:28 PM cnomad: ok
02:28 PM cnomad: ok, seems like http://linuxcnc.org/docs/html/config/ini-homing.html is pretty clear
02:29 PM cnomad: "If HOME_SEARCH_VEL is non-zero, then LinuxCNC assumes that there is a home switch. It begins by checking whether the home switch is already tripped. If tripped it backs off the switch at HOME_SEARCH_VEL. The direction of the back-off is opposite the sign of HOME_SEARCH_VEL. Then it searches for the home switch by moving in the direction specified by the sign of HOME_SEARCH_VEL, at a speed determined by its
02:29 PM cnomad: absolute value. When the home switch is detected, the joint will stop as fast as possible, but there will always be some overshoot. The amount of overshoot depends on the speed. If it is too high, the joint might overshoot enough to hit a limit switch or crash into the end of travel. On the other hand, if HOME_SEARCH_VEL is too low, homing can take a long time."
02:29 PM cnomad: then for home_latch_val: "Specifies the speed and direction that LinuxCNC uses when it makes its final accurate determination of the home switch (if present) and index pulse location (if present). It will usually be slower than the search velocity to maximize accuracy. If HOME_SEARCH_VEL and HOME_LATCH_VEL have the same sign, then the latch phase is done while moving in the same direction as the search
02:29 PM cnomad: phase. (In that case, LinuxCNC first backs off the switch, before moving towards it again at the latch velocity.) If HOME_SEARCH_VEL and HOME_LATCH_VEL have opposite signs, the latch phase is done while moving in the opposite direction from the search phase. That means LinuxCNC will latch the first pulse after it moves off the switch. If HOME_SEARCH_VEL is zero (meaning there is no home switch), and this
02:29 PM cnomad: parameter is nonzero, LinuxCNC goes ahead to the index pulse search. If HOME_SEARCH_VEL is non-zero and this parameter is zero, it is an error and the homing operation will fail. The default value is zero."
02:29 PM gloops: you probably found this already http://linuxcnc.org/docs/html/config/ini-homing.html
02:29 PM cnomad: :P
02:29 PM cnomad: yeha had to re-read it
02:32 PM gloops: If HOME_SEARCH_VEL and HOME_LATCH_VEL have the same sign, then the latch phase is done while moving in the same direction as the search phase. (In that case, LinuxCNC first backs off the switch, before moving towards it again at the latch velocity.) If HOME_SEARCH_VEL and HOME_LATCH_VEL have opposite signs, the latch phase is done while moving in the opposite direction from the search phase. That means LinuxCNC will latch the first pulse
02:32 PM gloops: after it moves off the switch.
02:32 PM gloops: dunno if that is related to your problem
02:32 PM cnomad: beautiful. i got it to work as intended
02:33 PM cnomad: yeah I left the latch vel positive and search vel negative
02:34 PM cnomad: thank you kindly for your guidance. I will reconsider the homing direction as well, in case the damage caused by crashing is more repairable in the other case
02:37 PM gloops: well im not much of a guide lol, but i have gone through this myself
03:40 PM beanbag-: https://www.newegg.com/Product/Product.aspx?item=N82E16820331047
03:44 PM Deejay: gn8
04:27 PM Lcvette: anyone running a 7i92 or 7i76e with a nuc?
05:21 PM SpeedEvil: https://youtu.be/YP_UBNwEoGs?t=261 - you won't believe what happens next!
05:22 PM SpeedEvil: How Much Weight Can a Soda Can Hold? Hydraulic Press Test
05:22 PM SpeedEvil:
05:22 PM SpeedEvil: Really interesting fail when full
05:31 PM andypugh: The corrugated can is really pretty
05:33 PM CaptHindsight: love the accent
05:34 PM CaptHindsight: Smashin with Stash
05:35 PM SpeedEvil: andypugh: I'd never have predicted that, it's beautiful
05:38 PM CaptHindsight: that guy should have a kids science show
05:38 PM SpeedEvil: He pretty much does.
05:38 PM CaptHindsight: Today kidnicks we are to have many bubbles in moms and dads hot tub
05:39 PM sync: SpeedEvil: it is one of the properties Al and carbon fiber exhibits when you squeeze them
05:41 PM CaptHindsight: CCCPTV Kids Sciences
05:41 PM SpeedEvil: sync: Carbon fibre does not fail like that at all.
05:42 PM SpeedEvil: It is a failure specific to pressurised thinwall pipes I think.
05:42 PM andypugh: The corrugutaions stop growing, at a guess, when the work-hardening effect overcomes the geometric effect.
05:43 PM sync: SpeedEvil: it fails very similarily
05:43 PM CaptHindsight: how much does fluids in the cans has effects on the crushingneses?
05:43 PM sync: crushing from one end tho, which also happens with Al tubes
05:43 PM SpeedEvil: CaptHindsight: lots. It just crumples without it
05:44 PM sync: the interesting thing about Al and cfrp is that they take the same energy throughout the crushing
05:44 PM SpeedEvil: they show an empty can just before - which fails as expected, at ~70kg, compared to the 340 of the full one
05:44 PM CaptHindsight: how much does air pocket have on can vs full can
05:45 PM SpeedEvil: It stats out likely at ~30PSI or so, and will rapidly rise as you crush it.
05:45 PM CaptHindsight: when I'm no longer surrounded by those accents I find it charming
05:46 PM SpeedEvil: andypugh: I guess it's designed for impact-forming, and needs a ridiculous ductile range - but that eventually runs out when the corrugation stops growing
05:49 PM SpeedEvil: Inpact forming is ridiculously awesome
05:53 PM sync: the can? they are formed through dies
05:53 PM sync: but yeah the alloy has to be very ductile
06:11 PM CaptHindsight: have you noticed how easily the cans burst when you drop them on an edge?
06:14 PM CaptHindsight: https://www.antiquesnavigator.com/archive/2011/11/16/300621090340.jpg they used to have rolled lips on each end
06:15 PM sync: yes, but that is more expensive to make
06:16 PM CaptHindsight: cap with bottle cap https://img.buzzfeed.com/buzzfeed-static/static/2014-05/enhanced/webdr08/21/12/original-16854-1400690730-17.jpg?downsize=700:*&output-format=auto&output-quality=auto
06:17 PM CaptHindsight: can with
06:27 PM Sawdust83: hello
06:28 PM Sawdust83: is there a good websight to get the setup for chinese cnc 2030?
06:28 PM Sawdust83: first time using linxcnc
06:30 PM renesis: check 1
06:30 PM renesis: nickserv is annoying i cant believe i gotta use this crap now
06:30 PM renesis: also hi
06:48 PM rmu: UFOs over ireland!
06:50 PM CaptHindsight: already quit
06:50 PM CaptHindsight: I'll take answer my question in under 20 minutes for $200
07:44 PM weenerdog: howdy howdy
08:24 PM andypugh: Goodnight all
08:25 PM Tom_itx: later andy
08:28 PM Tom_itx: https://www.youtube.com/watch?v=CMWF7vWaGAY
08:35 PM sadpone: anyone here have experience or know how good a taig cnc mill is?
08:35 PM sadpone: im thinking of getting one because for the cost it seems quite capable
08:41 PM renesis: ive had one 12 years, works better now than new
08:42 PM renesis: https://www.deepgroove1.com/cnc-mill
08:42 PM renesis: i got it from this guy, hes on ebay
08:42 PM renesis: make sure you get the ER16 spindle
08:43 PM renesis: also if you are machining taller parts, interference with the z screw and ways can eat up your evelope
08:43 PM renesis: *envelope
08:44 PM renesis: itll do 6061 and circuit boards like whatever, had good experience engraving w/o a spring-loaded tool
08:44 PM renesis: def a score versus some aluminum extrusion frame gantry shit, or converted china mills
08:48 PM sadpone: ooh neat
08:49 PM sadpone: whats the difference between deepgroove1's one and one i get from taig?
08:49 PM sadpone: im in australia you see
08:50 PM sadpone: ive heard deepgroove mentioned before
08:53 PM renesis: im not sure taig offers the machine with motors and drivers
08:54 PM renesis: he sells it pretty much turnkey, you just need a pc with a parport
08:55 PM sadpone: over here they do but i feel like its super marked up and only a mediocre setup
08:55 PM sadpone: im just gonna buy a manual one and upgrade later once ive saved the money and really need/want cnc
08:56 PM sadpone: which raises the question, should i get stepper or servos?
08:56 PM renesis: deepgroove has steppers as big as you would want, and a gecko driver
08:56 PM renesis: stepper is a lot easier i think but servo might be fine now
08:56 PM sadpone: fine now?
08:57 PM renesis: yeah like, cheap, easy to drive
08:57 PM sadpone: ah
08:59 PM renesis: deepgroove will sell you the motor and drive setup
09:00 PM sadpone: deepgroove is in usd and in the us
09:00 PM renesis: would email him and let him know your plan
09:00 PM renesis: yes
09:01 PM sadpone: the cost in usd matches the cost here in aud
09:01 PM renesis: but he will deal off ebay, i purchased through paypal direct after a few emails
09:01 PM sadpone: and aud-> usd is 1:0.6
09:01 PM renesis: with gecko drives, motors, power supply, and nice box?
09:01 PM sadpone: currency exchange is not my friend here
09:01 PM renesis: ooh
09:01 PM renesis: well, all that aside, great machine however you end up getting it
09:02 PM sadpone: yeah with postage itle probably cost me nearly twice as much
09:02 PM sadpone: ill keep an eye out for the name though
09:07 PM sadpone: oh look https://www.ebay.com.au/itm/taig-2019-cnc-ready-milling-machine/162608841465?hash=item25dc3e02f9:g:PEUAAOSwoBtW6cam:rk:17:pf:0
09:07 PM sadpone: deepgroove
09:07 PM sadpone: no controller or anything tho (
09:07 PM sadpone: or motors
09:09 PM sadpone: so, about PCB milling
09:09 PM sadpone: what is 6061?
09:10 PM sadpone: or is that just a type of alu used in alu backed PCBs?
10:05 PM Tom_itx: 6061 is an aluminum alloy used in all sorts of things
10:06 PM Tom_itx: but you left
10:06 PM Tom_itx is now known as Tom_L