#linuxcnc Logs

May 03 2019

#linuxcnc Calendar

01:09 AM Loetmichel: mornin'
01:25 AM Deejay: moin
01:33 AM Loetmichel: soo, PC running again. Free advice fo all that still have win7 and a nearly full c:\ : Delete §WINDOWS\Logs\CBS My system spawned 100s of "makecab.exe" trying to compress that 23mb logs. Writing $temp full in the process. Deleted \CBS and now system is running fast again and 70GB free on c:\ instead of 12MB. :-)
02:24 AM * Loetmichel ordered a couple used 512gb micron SSDs a few days ago and is eager to see how the "refurbishment" worked... i wonder how much hours they have on them ;) ... hopefuly they arrive today.
02:26 AM Loetmichel: on ebay of course
03:13 AM miss0r: 'ello
03:15 AM SpeedEvil: https://xkcd.com/691/
03:17 AM SpeedEvil: At that time, maximum capacity was a pedestrian 16gb. Now 512
04:05 AM SpeedEvil: OHSA intensifies. https://imgur.com/gallery/TpyGySe
04:17 AM Loetmichel: SpeedEvil: nice...
04:17 AM XXCoder: now thats hot
04:17 AM Loetmichel: seen that one?
04:18 AM Loetmichel: https://www.youtube.com/watch?v=KFBx4fIteIA&t=2s
04:18 AM Loetmichel: (yes, i have confidence in my CNC programming :-)
04:19 AM SpeedEvil: :)
04:20 AM XXCoder: lol
04:23 AM Loetmichel: "what i do to save my bosses ass" ;)
04:28 AM rmu: this is really dangerous. i cut myself doing something similar for a loudspeaker case
04:54 AM Tom_L: morning
04:58 AM Tom_L: Loetmichel, nice clamps
04:58 AM Tom_L: hope you don't misplace them
04:59 AM XXCoder: only 10 and irreplacable
05:27 AM XXCoder: woot new clickspring patreon video
05:57 AM * jthornton has no electricity
06:00 AM Loetmichel: rmu: i once drilled a 3mm hole thru my thumb nail AND bone and out in a similar setup, i KNOW its dangerous first hand ;)
06:00 AM Loetmichel: (note to self: stop the spindle before changing the workpiece, especially if its long and cantilevered in the vice!)
06:06 AM jthornton: chickens are all standing tall and looking around trying figure out what that noise is from the generator
06:21 AM Loetmichel: jthornton: power grid failure?
06:22 AM jthornton: something failed for sure dunno what
06:22 AM jthornton: maybe a tree broke the line somewhere
06:25 AM Loetmichel: and internet is still working?
06:26 AM Loetmichel: <- surprised pikachu
06:26 AM Loetmichel: over here they slowly but surely deleted all the UPSes in the exchanges
06:26 AM Loetmichel: so power failure: instant internet AND telephone loss
06:29 AM jthornton: I have a 3 phase diesel generator
06:30 AM jthornton: big enough to power the whole house
06:37 AM jthornton: I see power has been restored so as soon as the wife is out of the bathroom I'll switch back to the mains
06:39 AM hightower3: Hey folks can you recommend some good and not too complex and compatible cnc kits that are available? Ideally I'd get a 1.5x1 meters table with enough mounting flexibility and sturdiness to mount various tools on it later
06:40 AM Loetmichel: jthornton: no automatic failover/uninterrupted switchback?
06:41 AM jthornton: no, I'm the switch lol as it's an older generator I have to start it up then switch out the mains then switch on the generator
06:43 AM jthornton: I wonder if there is a backup of the wiki somewhere
06:47 AM * Loetmichel has seen an old "UPS" system a while back that userd a 600hp marine diesel and a biiig flywheel on a generator/electric motor. flywheel is turning all the time, engine is preheated electrically and oil pump running electrically... the moment the power fails the flywheel provides short time energy and the magnetic clutch falls off, ripping the engine to nominal rpm in less than 1/2
06:47 AM * Loetmichel second... grute force approach but worked for decades ;)
06:47 AM Loetmichel: brute
06:48 AM Loetmichel: was an old hospital btw
06:48 AM Loetmichel: nice thing: no batteries needed at all
06:59 AM jthornton: and I'm back on the grid now
08:05 AM Elmo40: Loetmichel, that is a very good, and fast system!
08:05 AM Elmo40: must be one hell of a flywheel to start a 600Hp diesel that quickly!
08:07 AM hightower3: http://wiki.linuxcnc.org/cgi-bin/wiki.pl --> Software error: Can't locate object method "startform" via package "CGI" at wiki.pl line 1501.
08:09 AM jthornton: yea we know
08:09 AM jthornton: https://web.archive.org/web/20181128123513/http://wiki.linuxcnc.org/cgi-bin/wiki.pl
08:10 AM jthornton: you can view it there
08:13 AM Loetmichel: Elmo40: was pretty loud, too
08:13 AM Loetmichel: PffiiuBROMBEL
08:13 AM Loetmichel: :-)
08:58 AM pcw_home: That FB post with the exploded fly cutter suggests adding a max RPM field to the tool table might not be a bad idea...
08:58 AM syyl: saw that too, a moment ago
08:59 AM syyl: the part going trough the whole shop doesnt shock me as much
08:59 AM syyl: more the vice that has torn off the table and the jaw snapped in two
09:05 AM pcw_home: my rough calculations say ~5000G at the end of the flycutter
09:06 AM tiwake: you have a linky?
09:07 AM pcw_home: <Rab> https://www.facebook.com/DnJPrecisionMachine/videos/2294066584184740/
09:08 AM tiwake: holy snot
09:08 AM tiwake: also, thats a large fly cutter
09:08 AM tiwake: yeah, I could see that happening
09:11 AM tiwake: can't say I've had things fly apart from spinning too fast
09:12 AM rmu: 50000m/s²?
09:14 AM pcw_home: I guessed about 1 foot circumference
09:15 AM pcw_home: 12000 RPM = 200 RPS so 200 FPS (and 400 FPS velocity change in 2.5 ms) = ~5000G
09:21 AM rmu: hmm
09:22 AM rmu: \omega^2 times r
09:33 AM flyback: Elmo40,
09:33 AM flyback: BMCC
09:33 AM flyback: BITE MY "CANUCK"..................................................................CANUCK!
09:33 AM flyback: EH?_HOLE
09:33 AM flyback: BUT seriously
09:33 AM flyback: have you ever seen pony engines?
09:33 AM flyback: * Loetmichel has seen an old "UPS" system a while back that userd a 600hp marine diesel and a biiig flywheel on a generator/electric motor. flywheel is turning all the time, engine is preheated electrically and oil pump running electrically... the moment the power fails the flywheel provides short time energy and the magnetic clutch falls off, ripping the engine to nominal rpm in less than 1/2
09:33 AM flyback: that's still done today
09:34 AM flyback: they have flywheel ups's and flywheel ups that also have a diesel on them
09:34 AM flyback: this one cisco made for a college
09:35 AM flyback: they had a double clutch on it
09:35 AM flyback: if some reason the diesel didn't start the normal way
09:35 AM flyback: they could dump all the flywheel energy into the diesel instead forcing it to start
09:35 AM flyback: START DAMN YOU!
09:35 AM * flyback cranks the whip
09:36 AM flyback: it's neat they use a sandy like material for the flywheel on some of them
09:36 AM flyback: so if it shits itself there's less carnage and dead people
09:40 AM methods_: https://www.businessinsider.com/man-swallows-apple-airpod-while-sleeping-still-worked-2019-5
09:40 AM methods_: apple, their shit just works
09:40 AM methods_: even when it's in your shit
10:08 AM Loetmichel: flyback: its soudn starting the diesel from the flywheel was scary for sure
10:09 AM Loetmichel: you could hear the clutch slip for half a second and then the engine was up to 1500 RPM
10:09 AM Loetmichel: not a small feat for a biiig 600hp ship diesel
10:09 AM Loetmichel: and you could feel the concrete floor shudder
10:48 AM mtpocketscnc: hello all
11:03 AM mtpocketscnc: I'm wondering if anyone can help me with some gcode... https://pasteboard.co/Id0tNOE.png Can I modify something like arcspiral.ngc to start at outside of center hub and spiral outward to meet inside of we'll call it "wheel edge" while dropping Z? so something like cone
11:06 AM mtpocketscnc: I have tried the 3d pocket feature on freecad with no luck.... Pycam would do it ,but I can't restrict it to just the cone shape. I could do the whole thing but it would take forever
11:10 AM flyback: Loetmichel, nice
11:15 AM Loetmichel: flyback: the flywheel was a massive disk of steel though
11:15 AM Loetmichel: about 2,5m in diameter and about 20cm thick
11:16 AM Loetmichel: not sand
11:16 AM Loetmichel: and it was right on the 3 phase motor/generator shaft
11:17 AM Loetmichel: and the diesel was ALWAYS started with the flywheel, not "just in case the starter dosent work"
11:27 AM flyback: ah neat
11:27 AM flyback: some flywheel ups's use composite wheels
11:28 AM flyback: so if it breaks there less deadly mass
11:28 AM flyback: it tends to shred
11:46 AM Loetmichel: flyback: looked like they just took a HUGE disk of stell, bored the shaft diameter, turned the outside a bit, then balanced it and threw it on the generator
11:46 AM Loetmichel: steel
11:46 AM Loetmichel: didnt look like cast iron at all
11:46 AM Loetmichel: so no danger of it fragmenting at all
12:15 PM Valduare: wiki still down eh
12:16 PM jthornton: yea, you can view a snapshot of it if you like
01:40 PM * Loetmichel is kind of a glutton... just ate a, 850g can of "pichelsteiner" stew, a complete pack of 125g salami on 8 slices of whole grain bread AND 500g of gouda cheese... and then washed it down with 2 liters of cola ;) no wonder i am 120kg heavy ;)
01:44 PM jthornton: that will surely do it...
02:29 PM Deejay: gn8
02:52 PM serp: what is the role of the fpga is in a mesa card?
03:00 PM Tom_L: offload the work from the pc to the fpga
03:01 PM Tom_L: ie stepgen, pwmgen, encoder etc
03:06 PM JT-Shop: Tom_L: rain ever end at your place?
03:07 PM Tom_L: yeah
03:07 PM Tom_L: was still misting a bit this morning but it's tapered off
03:09 PM JT-Shop: been pretty quite around here today, overcast but that is it so far
03:11 PM Tom_L: why did your power go out?
03:33 PM JT-Shop: I guess a line broke somewhere last night, wife got up at 2am and it was out till 6:30am or so
03:36 PM jym: no generator?
03:37 PM JT-Shop: got 3 generators
03:37 PM * jym imagining Papa Gen, Mamma gen, and Babby Gen
03:38 PM jym: I am loving this gas/propane gen, now have it setup to be able to tap into the 250 gal tank easily
03:41 PM jym: JT-Shop: IS one of those a PTO generator?
03:41 PM JT-Shop: my favorite is a 2 cylinder Deutz diesel with a 15Kv 3 phase generator and electric start
03:42 PM jym: JT-Shop: I wish, just 4500, but it does nicely and fairly quiet
03:43 PM jym: and no having to fill it up just attach hose and done =)
03:44 PM jym: serp: I believe it's to offload some of the load from the PC to the FPGA
03:44 PM serp: does that mean the pc doesn't need real time kernel?
03:45 PM jym: serp: As I understand it, you still need that aspect, and still need to have good latency
03:46 PM jym: serp: pcw_home would know more for sure
03:47 PM JT-Shop: yea you need the real time kernel but the latency can be up to 100k
03:47 PM JT-Shop: for ethernet cards you need rt preempt kernel
03:48 PM JT-Shop: http://gnipsel.com/linuxcnc/uspace/index.html
03:48 PM JT-Shop: serp: ^^
03:52 PM serp: Thank you
03:54 PM JT-Shop: I use Debian 9 now
03:56 PM serp: I see.. I had wondered about the install iso having wheezy
04:04 PM * JT-Shop thinks the water dripping out of the plasma pc case is not going to be a good thing
04:41 PM jym: JT-Shop: how old in the pc?
04:45 PM ve7it: Still running rtai ubuntu 10.04 on a PIII 800Mhz parallel port stepping on my mill/lathe combo... it actually ran a little better on ubuntu 8.04... no more updates for that box!
04:48 PM jthornton: you can still get updates for 10.04
06:58 PM tiwake: I got a box mailed to me from OSG from the manufacturing trade show houstex
06:58 PM tiwake: had all the OSG catalogs :3
07:30 PM net|: https://i.imgur.com/Wff3Kh1.png my first globoid gear design. was easy with tutorial
07:59 PM jym: net|: Are you abe to export from blender to soem CAM program?
08:00 PM jym: net|: nice job
10:37 PM skunkworks: https://www.youtube.com/watch?v=OMreIgsMnW8&feature=youtu.be
11:10 PM Jymmm: skunkworks: What do you mean you dont want to runt he spindle into the table, SMH
11:18 PM justan0theruser is now known as justanotheruser