#linuxcnc Logs
Jan 12 2020
#linuxcnc Calendar
12:00 AM nvz: same deal with cars.. you get that voltage too low.. you're gonna need some patience :P
12:05 AM nvz: I had also once tried to diagnose caps on a motherboard with an in-circuit esr meter and replace them cause this old guy didnt wanna change and his mobo was no longer made, and was propritary.. that didn't go well
12:05 AM nvz: no sooner had I replaced several, several more went bad
12:05 AM nvz: I was sitting here tonight debtating adding an ardunio or maybe one of thse USB hid relay things to my machine
12:07 AM nvz: should be able to finagle that to be rpm speed sensor or whatever
12:12 AM nvz: I'm also prob just gonna order this parallel port cnc controller with 3 relays on it for now
12:12 AM nvz: cause the only one I got now wont to much of shit but move the motors
12:12 AM nvz: I got plenty of amps to spare on my 12V psu to add lights and crap
12:56 AM _unreal_: Tom_L, shhh dont give away my secretes
12:56 AM _unreal_: wow I'm up late
12:56 AM _unreal_: nvz, What wwere you asking?
12:57 AM nvz: _unreal_: just if that computer had enough oompf to be a decent design machine for win8/10
12:57 AM _unreal_: What computer?
12:58 AM nvz: its a core2duo e8400 3GHZ w/ 4gb ram and integrated intel graphics I guess it is
12:58 AM nvz: dell opti 780 usff I have here
12:58 AM _unreal_: lol :) Intel(R) Pentium(R) CPU P6100 @ 2.00GHz
12:59 AM _unreal_: this laptop is a very low power but it has 8gb ram
12:59 AM nvz: I ordered the opti 780 in sff should be here monday.. that'll run the cnc.. it has a paralelle port and I bought a radeon hd 3470 dual-dp card for it
12:59 AM _unreal_: I can run fusion360 on it and othe rstuff just fine. GETS slow when I make complex stuff DONT get me wrong but it works
12:59 AM nvz: I figured I could just put both machines in the base of my cnc where I have space with a hdmi kvm switch and run the machine and design
12:59 AM _unreal_: My I5 is way better
01:00 AM _unreal_: ya you dont want to use the same computer for both CAD and driving LCCN
01:00 AM _unreal_: LCNC
01:00 AM nvz: yeah.. well I have an i5-4300U in this T440 I use.. and I can run a SATA ssd plus one in my WWAN port.. so.. if need be I can get dual-boot on this too
01:01 AM _unreal_: nvz, My goto for CAD is designspark
01:01 AM _unreal_: I own fusoin360 but DESIGNspark kills fusion when it comes to design speed
01:01 AM nvz: _unreal_: yeah well I already have one that couldn't easily run it, and ordered one for $50 that can.. they're both small.. I got 16 cavities in the base of this machine that are like 98cu inches of space.. 14x14x0.5in
01:02 AM nvz: I figure I get a cheap HDMI kvm and I can switch between the two one running linux the other running windows
01:02 AM _unreal_: one what that couldnt run what?
01:02 AM nvz: the one I have is the Opti 780 USFF (Ultra-small form factor) it has no parallel ports and no expansion slots..
01:03 AM nvz: the one I ordered is the Small Form Factor, it has a parallel port, a pci ,and a pcie 16x
01:03 AM nvz: both the same machine, but the one I ordered has a slightly slower cpu, and can go up to 8GB ram where the USFF is maxed out at 4GB
01:05 AM _unreal_: nvz, its funny the computer I found on fri. at work in the dumpster. I cant run untill I get the PSU swapped.
01:06 AM _unreal_: its got a 240v 50hz psu. its a EURO psu
01:06 AM nvz: with that radeon card I ordered for the SFF, I can hook a small touchscreen to the linuxcnc machine as well as the KVM.. so I can keep the machine running and have a small 2nd display to do things even when its switched over to the windows machine
01:06 AM _unreal_: nvz, have you ordered a display yet?
01:06 AM _unreal_: IF NOT look into the RPI touch screens
01:06 AM _unreal_: they are amazing
01:07 AM nvz: I got several here.. but I haven't gotten a small one yet.. was thinking as you said.. like a 7in rpi touchscreen
01:07 AM nvz: I got several to use as the main display.. in the 17-24in range
01:07 AM _unreal_: I've had issues with drivers for the 7" displays FYI
01:07 AM _unreal_: I'd suggest the 10"
01:07 AM _unreal_: on linux
01:07 AM _unreal_: maybe you wont have any issues
01:08 AM nvz: yeah I could make anything work.. I'll just build like a 40-60deg box off the front of the machine
01:08 AM nvz: its about 6in tall.. the front panel..
01:08 AM nvz: just mount it right in that lil box where its at an angle whatever size it is..
01:09 AM _unreal_: What I'm saying is the 7" displays I forget the res. but a lot of distros dont support it
01:09 AM _unreal_: unless your using an RPI. or running windows
01:09 AM nvz: they're typically 1024x600
01:09 AM _unreal_: ya
01:09 AM nvz: or 800x600
01:09 AM _unreal_: 1024x600 sounds fermil
01:09 AM nvz: I'd just be using it as a 2nd display not primary
01:10 AM _unreal_: https://photos.google.com/share/AF1QipNjUL9VJW4BIh58ZOHM6jOWS10l43lfzL_nr7FMD-YXm_o6hG63BfTN2Rv6ch6C_Q?key=OVV0UTBXUmF0NXNSR2NKVzdoaFhxQzVTbDI5V3JB
01:10 AM nvz: just something to allow monitoring/controlling of the machine while the main linuxcnc on the big screen was switched over to the windows box on the kvm
01:10 AM _unreal_: that LCD
01:10 AM _unreal_: it works but unless I plug it into an RPI or run it on a windows system. I cant get the rigth res. to work
01:11 AM _unreal_: it works but only at 1024x768 which streaches shit
01:11 AM nvz: yeah well I'm saying this would probably only be running a custom designed kiosk app I'd write
01:12 AM nvz: just something to show sensor info, job time, etc..
01:12 AM nvz: basic controls
01:12 AM nvz: I wouldn't try squeeze the linuxcnc program onto a small display when I'm gonna have a larger one that I can toggle between two machines at the press of a button
01:13 AM nvz: the litte screen would just be a means to have my own controlboard with my own readouts that I can easily change
01:13 AM nvz: to do that with little led/lcd displays, buttons, and switches would be far more difficult
01:13 AM nvz: and more a pain to change as needed
01:14 AM _unreal_: I have a few of these
01:14 AM _unreal_: http://www.bgmicro.com/LCD1054.aspx
01:14 AM _unreal_: which I knew what controller it needs and the missing backlight driver
01:15 AM nvz: I was also thinking about getting a tablet for the design
01:16 AM _unreal_: What about a control pendent?
01:16 AM nvz: the usb/wireless drawing tablets with the dials and extra keys
01:16 AM _unreal_: I've never tried using one of those for cad work
01:17 AM nvz: _unreal_: I condemplated one of those for the main power and estop..
01:17 AM nvz: they have ones with key switches.. and ways to lockout the start button and such
01:18 AM nvz: but I was just gonna rip apart this ps3 controller for manual jogging
01:18 AM nvz: its already a hid device linuxcnc says it supports those.. I can mount those controls right into the frame of the machine
01:18 AM nvz: even along side the touchscreen
01:19 AM nvz: the tablet would stay plugged into the windows box, the ps3 controller and touchscreen to the linux box, only the keyboard/mouse/main screen would be toggled with the switch
01:19 AM _unreal_: I have a wireless one
01:20 AM nvz: and I'm probably going to add a camera or two to the linux box
01:20 AM nvz: though I may just put a seperate machine in for that and not try lag it down
01:20 AM nvz: I got an orangepi lite and a thin client :P
01:21 AM nvz: either could run usb cameras
01:22 AM nvz: even so, with the wireless keyboard/mouse/tablet, I'll probably want to get usb extensions and run their reciever nubs out near the front of the machine somewhere
01:22 AM nvz: maybe to where the belt attaches for the y axis
01:27 AM nvz: cause I'm gonna put all the electrnoics in the back
01:27 AM nvz: signal would not be good with 2 or more computers, 4 psus, 4 motor drivers..etc all back there
01:27 AM _unreal_: cameras are good but I would always suggest spending as little time away from the machine when its running a cut cycle
01:27 AM nvz: yeah I was just saying earlier I may at some point make the machine remotely accessible if someone wants to rent it.. and we can just man the shop and put the materials in, change bits as needed, etc.. and people can see whats going on and run a program
01:27 AM nvz: make money on machine time and delivery of materials in and out
01:27 AM _unreal_: ya THAT likely would work well
01:27 AM _unreal_: they give you the design. you deal with it. no liability
01:29 AM nvz: without the key in, the machine doesn't run..
01:29 AM _unreal_: its not a good idea to let someone run a machine that does not own it
01:29 AM _unreal_: period
01:29 AM XXCoder: yeah might have bad gcode
01:30 AM XXCoder: once had programmer at work misplace a . in gcode
01:30 AM _unreal_: or force it into the limits or have Z heights set wrong
01:30 AM _unreal_: etc...
01:30 AM XXCoder: unfortunately it was feed. tool thats inch thick broke and smashed into bulletproof glass
01:31 AM XXCoder: guy turned something like 10 ipm to 100
01:31 AM _unreal_: hehe
01:31 AM XXCoder: forgot what number it was, but it was 10 times
01:31 AM XXCoder: good thing glass was bulletproof, it was going towards guy who was running it
01:33 AM _unreal_: 2:30am I'm going to bed
01:34 AM XXCoder: nvz: if you want to do it, do it in very limited setup and xyz is always same place
01:34 AM XXCoder: ie sheet fixture so persob can cut any shape out of sheet
01:35 AM nvz: this would be down the road a good ways, after lots of things were added and modified
01:36 AM XXCoder: have strong terms on fee for damaging something
01:36 AM XXCoder: like if one guy destroys the fixture, breaks a tool, or while machine
01:36 AM XXCoder: *whole
01:37 AM nvz: they'd have to submit a plan and deposit first anyhow, cause we'd need to know what material and tools were required and how to mount it and such
01:38 AM nvz: there are a ton of little things I've thought of adding that we're not going to have when this is running soon
01:39 AM nvz: laser diodes to line things up, lights, cameras, vac setup, a shroud to contain flying crap.. etc..
01:39 AM nvz: not even to mention we'd have to change the whole network and electrical system first, update this stuff to work on a more recent codebase..etc
01:40 AM nvz: by then we'll probably have built another machine and have a 3d printer and scanner
02:29 AM Deejay: moin
03:08 AM Jymmm: Deejay: morning
04:00 AM Loetmichel: _unreal_: just a dirt cheap "hobby freight" compressor.
04:09 AM SpeedEvil: https://imgur.com/gallery/czjkpaI 'Damascus steel is a lost art' - explaining how it wasn't
04:14 AM p0g0: SpeedEvil, wasn't lost, wasn't an art, or is Damascus "watered" steel a hoax?
04:55 AM XXCoder: the winter is coming lol
04:55 AM XXCoder: tomorrow is last day with no snow looks like
04:55 AM XXCoder: looks like will snow more often than last year too (2 times)
04:56 AM p0g0: eh, 64F today. This might be the first winter in 50 years that I don't get icicles on the cliff faces.
04:57 AM XXCoder: here climate prevents nearly all snow
04:58 AM p0g0: East Kentucky: snow has been slowly fading from the winter scene here. I ski , so I keep score
04:58 AM XXCoder: sucks :(
04:58 AM XXCoder: au is having really serious fire issues there
04:59 AM XXCoder: over billion animals died so far
04:59 AM p0g0: But the cliffs here normally freeze and acquire huge icicles. That seems unlikely this year.
05:00 AM XXCoder: never will have perfect locked room murder mysteries here.
05:00 AM XXCoder: icicles simply never form
05:05 AM SpeedEvil: A billion notable animals
07:27 AM tiwake: https://www.youtube.com/watch?v=wopmEyZKnYo
09:07 AM Elmo40: tiwake, the comments about this vid are also super helpful.
09:08 AM Elmo40: more tips on making the circuit suitable for different voltage ranges.
09:16 AM jymmmm: good morning folksssss
09:25 AM Elmo40: moo?
09:41 AM skunkworks: https://youtu.be/RDKaFJmB254
10:14 AM dirty_d: mesa board holes are 0.125", my ocd has me stuck between using 4-40 or M3
10:21 AM Tom_L: use half and half
10:32 AM Rab: dirty_d, that's a looser fit on 4-40 than M3. So if your OCD doesn't compel you to place the mounting holes with complete exactitude, maybe 4-40 is the safer choice.
10:33 AM jymmmm: or duct tape
10:33 AM Tom_L: jymmmm, no
10:34 AM Tom_L: double back tape
10:34 AM jymmmm: jbweld
10:34 AM Rab: Hot glue?
10:36 AM dirty_d: *ocd intensity intensifies*
10:37 AM jymmmm: silly putty
10:44 AM skunkworks: blue tac
12:04 PM Elmo40: i like the hot glue option
12:05 PM Elmo40: no holes required!
12:16 PM Elmo40: skunkworks, raspi4 running lcnc?
01:25 PM Jymmm: GITD hot glue gun!!!
02:45 PM enleth: when an old part spec for a bolt lists "strength" of the material for the part without specifying if it's yield or tensile, which do you think is more likely?
02:50 PM enleth: those are safety bolts on a link arm between the gearbox and the blade carriage on a paper cutting press
02:50 PM enleth: can't be too strong as they're supposed to snap and protect the rest of the machine, can't be too weak or they'll snap during normal operation
02:50 PM enleth: (the exact wording in German is just "Festigkeit", which is just "strength", there are separate compound words for yield and tensile)
02:50 PM andypugh: enleth: What number do they specify?
02:50 PM andypugh: Is it not the grade (8.8 etc)
02:50 PM SpeedEvil: i would for that purpose assume it is failure strength
02:50 PM andypugh: Metric grades are 4.6, 4.8, 5.8, 8.8, 9.8, 10.9, 12.9
02:51 PM enleth: 50-60 kp/mm2, an old-fashioned unit that equals 490-590 MPa
02:52 PM andypugh: https://www.engineeringtoolbox.com/steel-bolts-metric-grades-d_1428.html
02:52 PM andypugh: No real help on _which_ strength, though.
02:53 PM andypugh: But I would assume UTS
02:53 PM enleth: those bolts are pretty much what carries the full cutting force, exclusively in axial direction
02:54 PM andypugh: So start with some grade 5.8 bolts (good luck finding them though….) and see if they break?
02:54 PM SpeedEvil: Can you get an existing bolt, rig up a shear fixture, and compare?
02:55 PM enleth: andypugh: I was of the impression that 5.8 is the most common hardware store grade
02:55 PM andypugh: Possibly. I never use anything less than 8,8.
02:55 PM SpeedEvil: 4.6 threaded rod is widely available
02:57 PM enleth: SpeedEvil: I'll probably go with 5.8 now
02:58 PM enleth: TS is spot on
02:59 PM enleth: and I'll be sure to check for any stretch after a day or so of normal operation
02:59 PM SpeedEvil: Seems reasonable.
02:59 PM enleth: it's a bit of a PITA to get to those bolts, with the work table being in the way of the sheet metal cover, but I broke it so I fix it
03:02 PM enleth: pretty sure I have some 5.8 bolts of the right size, now I need to throw them on the lathe to turn the middle section down to a smaller diameter specified by the drawing
03:15 PM andypugh: Interesting. It would be better to drill down the middle. (not saying you should do that, I am saying that they should have done that)
03:15 PM andypugh: Drilling down the middle weakens the bolts in tension, but not nearly as much in torsion, so you can still tighten it.
03:30 PM Mr0rris0 is now known as Mr0rris01
03:58 PM skunkworks: Elmo40: yes - rpi4
03:59 PM Tom_L: skunkworks, workin better with the new image?
04:00 PM skunkworks: the new image is very nice. Jepler did a great job. The main thing that fixed it was switch to ntp..
04:00 PM skunkworks: it seems so far ;)
04:00 PM Tom_L: what is ntp?
04:01 PM skunkworks: it is a way to sync time with the internet. newer version of linux (as I understand) use timesyncd instead which seems to bang bang the time change instead.
04:01 PM Deejay: gn8
04:01 PM skunkworks: ntp seems to change the time with more finess...
04:02 PM Tom_L: network time protocol
04:02 PM Tom_L: wonder how that would affect performance
04:06 PM Elmo40: i have never seen 5.8 bolt. 4.8 and 8.8 are most common here (and with chinese imported products...)
04:06 PM Elmo40: enleth, what is the diameter of the bolt?
04:06 PM gregcnc: 4.8? is that like a hard cheese?
04:06 PM Tom_L: 3, 5 & 8 are more common here
04:06 PM Elmo40: skunkworks, why use a raspi4?
04:07 PM Tom_L: cheap
04:07 PM Tom_L: and compact
04:07 PM Elmo40: so is an i5 PC.
04:07 PM Elmo40: ok, not so compact as a raspi... but as inexpensive
04:07 PM pcw_home: skunkworks: want a SPI (7C80 or 7C81) card to muck about with?
04:10 PM skunkworks: pcw_home: always :)
04:11 PM skunkworks: Elmo40: yah - rpi4 seems finally powerful enought so the experince is plesent..
04:11 PM Elmo40: minus the little odd movement issues in the vid?
04:11 PM Elmo40: or did you actually resolve them?
04:18 PM Elmo40: skunkworks, i am interesting in this raspi4+lcnc mix. any hardware mods to do? what is your connection from raspi to machine? which boards? you have a blog somewhere i can read?
04:21 PM Tom_L: probably using a 7i92 ethernet card
04:22 PM Elmo40: what kind of latency does that have?
04:25 PM Elmo40: i guess that would allow almost any computer to be a controller for lcnc?
04:27 PM skunkworks: well - you still need decent realtime performance.. Into the 100us latency range
04:27 PM skunkworks: I am running a 2khz servo thread instead of the normal 1ms.. The pi seems to handle that better
04:29 PM skunkworks: (and mesa hardware - I am using ethernet. spi is also supported)
04:30 PM Elmo40: skunkworks, you have a list of harware you can post?
04:30 PM Elmo40: what is your latency like ?
04:30 PM skunkworks: if you don't run youtube it seems to stay under 100us
04:31 PM skunkworks: don't play youtube
04:32 PM pcw_home: skunkworks: does the RPI4 ethernet have a IRQ coalescing option
04:33 PM skunkworks: I don't know.
04:33 PM skunkworks: I don't even know the chipset off the top of my head.
04:33 PM pcw_home: I think you can ask via ethtool
04:36 PM Elmo40: skunkworks, yeah, it will be a CNC machine, not multimedia centre ;-)
04:36 PM pcw_home: ethtool -c [device_name]
04:39 PM skunkworks: ok
04:40 PM pcw_home: the option may not be there and may not help but worth a try
04:45 PM _unreal_: OMG.... make it end....
04:45 PM _unreal_: I have two items I NEEEEEED NOW for my daughters project
04:46 PM _unreal_: and they are not here yet
04:46 PM _unreal_: amazon claims they'll arrive by 9pm
05:03 PM enleth: Elmo40: M10, with an undercut to 7mm between the threads and the smooth part of the shank (obviously, to bring the cross section down where the resultant strength is right for the job)
05:04 PM Tom_L: _unreal_, they won't
05:05 PM CaptHindsight: skunkworks: https://www.raspberrypi.org/forums/viewtopic.php?p=1589280#p1589280 hardware acceleration for youtube on the pi4
05:05 PM enleth: Elmo40: they're supposed to snap when the cutting force is too high and snap they did
05:05 PM CaptHindsight: haven't tried it yet
05:06 PM enleth: Elmo40: also, literally the first two bolts I grabbed off the junk pile were 5.8
05:07 PM enleth: and most of the ones that are even marked at all are 5.8
05:08 PM enleth: that pair of 5.8 is probably long enough, so I'll just undercut them and be done with it
05:10 PM enleth: andypugh: this is a soviet-era Czechoslovakian design (with a manual in German, so probably got exported to East Germany at some point), not sure if they gave a shit about something like this
05:10 PM enleth: although I'd have preferred drilling the bolt, and come to think of it, I just might
05:11 PM enleth: way easier to chuck it on the lathe for drilling than turning the middle part
05:11 PM dirty_d: progress https://i.imgur.com/2PWybTM.jpg
05:15 PM andypugh: enleth: If you end up with the same cross sectional area as the necked bolt I think it’s a better way to do it.
05:16 PM enleth: definitely faster to machine if you start with a pre-made bolt
05:17 PM andypugh: I would drill from the head end, and only as far as the far end of the neck in the drawing.
05:19 PM enleth: ah, there's one more thing - the drawing actually specifies one more feature, a groove in the middle of the neck that brings the minimum diameter down even more, it's supposed to be made with a radius tool - but the bolts that were installed didn't have it
05:19 PM enleth: I know they're not original, so either someone couldn't be bothered to make them as specified, or actually knew they're using a weaker material and don't need that groove
05:19 PM enleth: which I presume is a designated snap point
05:20 PM enleth: actually, let me go downstairs and make a photo of that drawing
05:23 PM skunkworks: CaptHindsight: ooh - thank you - I will try that
05:28 PM enleth: andypugh: https://imgur.com/a/U8h8PCO
05:33 PM enleth: the broken bolt is just necked down with no groove and the neck is 7.65mm
05:33 PM enleth: come to think of it, there's probably a reason it snapped on the threads instead of the neck
05:38 PM X704 is now known as tiwake
05:39 PM enleth: andypugh: what I'm thinking is I'd drill the bolts and do a very slight rounded groove close to the head to encourage it to snap right there when it does
05:40 PM enleth: maybe even right where the head meets the shank
05:41 PM jthornton: is that grove right at the shear point?
05:42 PM enleth: it's not shearing those bolts, they
05:42 PM enleth: they're acting in tension only
05:42 PM enleth: they join two parts of a link arm that pulls down on a blade carrier
05:43 PM jthornton: ah ok, the drawing even has flats to remove the threaded part
05:43 PM enleth: the parts are aligned with a hardened dowel that's free to slide out of one of them when the bolts fail, but does a pretty good job of taking any radial force off of the bolts
05:45 PM enleth: what this groove's location might be is the interface between two link arm parts, but that's probably just to have it snap flush with the parts so they slide apart freely
05:45 PM enleth: irrelevant really, as the dowel needs to slide out anyway
05:47 PM jthornton: looks simple enough to turn on a cnc lathe
05:47 PM enleth: anyway, I *think* it should be safe to just get it down to the same cross section by drilling and put a slight groove on the outside just to discourage it from snapping at the threads
05:47 PM jthornton: except for the flats...
05:47 PM enleth: jthornton: I have a manual lathe only, and I definitely can't be bothered milling a hex head, so I'm in favor of drilling a pre-made bolt
05:48 PM skunkworks: Elmo40: well - With the pi I am using currently a 7i92... but I have used a lot of different mesa hardware
05:48 PM jthornton: I was thinking of just grabbing a M10 bolt and turning the reduced area and the groove
05:49 PM jthornton: even with a manual lathe not too hard to do
05:49 PM enleth: jthornton: it's hardred to chuck a relatively short bolt to turn it in the middle than to drill it
05:49 PM enleth: I'd have something like 20mm of thread to grab on in the former case
05:49 PM enleth: or all of the bolt right up to the head in the latter
05:49 PM jthornton: I just take a bit of round stock and thread it then split it in half
05:50 PM enleth: without the rest flapping about
05:50 PM enleth: eh, effort
05:50 PM jthornton: yea
05:51 PM enleth: I'm just wondering if there's more to that groove than simple cross-section reduction and placement of snap point
05:51 PM enleth: there shouldn't be, with the bolts acting in tension only
05:52 PM DaViruz: probably limits elongation
05:54 PM enleth: DaViruz: making it more likely to snap if it's past yield strength even if still not up to tensile strength, right?
05:54 PM DaViruz: something like that
05:59 PM gregcnc: it reduces the total amount the fastener stretches before it fails, streching over ~0.5mm vs 10mm
06:02 PM enleth: makes sense
06:02 PM gregcnc: so it should give a quick break when overloaded, vs stretching not breaking, and then leaving a loose joint
06:02 PM enleth: drilling and grooving close to the head should do then
06:03 PM enleth: with a slightly shallower groove to account for the larger cross section it takes up at a larger diameter
06:03 PM enleth: no, wait
06:04 PM enleth: same groove and smaller hole will be more reliable
06:04 PM gregcnc: you are just avoindg making one per print?
06:05 PM enleth: what
06:05 PM gregcnc: you have a print, why not make that?
06:06 PM enleth: to make workholding easier
06:07 PM gregcnc: the original was a modified stock fastener or machined?
06:07 PM DaViruz: i find a long nut and a normal nut makes holding screws simple
06:08 PM enleth: gregcnc: blued all over including the neck, so hard to say; I know it was ordered from a job shop a few years ago when the previous set snapped
06:08 PM enleth: and *that* wasn't original either
06:08 PM DaViruz: if concentricity isn't critical
06:10 PM enleth: I still have time to think anyway, I'll get to mashining when another guy comes in the morning who knows how to move the gearbox unpowered and we get the link arm parts to meet - so I can verify with absolute certainity what the bolt length should be. the broken one I have now is longer now, *after* it snapped, than the drawing indicates the whole thing should be
06:11 PM enleth: but the drawing label matches the machine model number
06:11 PM enleth: so either the drawing is wrong anyway, or something else is modified in there
06:25 PM andypugh: This is a super-cool kinematics: https://youtu.be/gMyvfx-qML0
06:29 PM enleth: https://www.researchgate.net/figure/A-5-axis-milling-machine-based-on-a-pentapod-developed-by-Metrom-Mechatronische_fig1_224200663
06:29 PM enleth: here's one without the top covers
06:29 PM gregcnc: I worked for a company who was trying to license something like that for the US market. I forget what it was called
06:29 PM enleth: looks like it's powered by hollow shaft servos integrated with ballnuts
06:31 PM gregcnc: ah it was exechon, not quite like the metron
06:31 PM gregcnc: metrom
06:31 PM enleth: cool design but they must have gone through hell and back to bring resonance and other shit like that down to an acceptable level
06:40 PM CaptHindsight: https://imgur.com/gallery/X5CYmOL surprised it works
06:42 PM gregcnc: now I want crepes
06:43 PM CaptHindsight: insect gears https://youtu.be/xQk-lP2R04Y?t=38
06:43 PM enleth: this is the Mad Max of kitchen appliances
07:36 PM Elmo40: https://www.youtube.com/watch?v=vMSJzm8GLNs
09:07 PM _unreal_: and suprise suprise. non of my items I ordered and said they would arrive today have arrived
09:07 PM _unreal_: all NOW say running late
09:14 PM infornography: but it's Sunday
09:16 PM _unreal_: amazon
09:16 PM _unreal_: and I dont mean woman
09:17 PM Tom_L: 'what they say' <> 'what they do'
09:22 PM enleth: in other news, I ordered new Bridgeport spindle bearings, supposedly a matched pair of NSK 7207 angular contact bearings for $108 from China
09:22 PM enleth: NSK does indeed have a manufacturing plant in the same area the seller is from
09:24 PM enleth: the part number and designation matches NSK naming schemes and almost matches the bearings that H&W uses for their BP rebuilds, other than indicating a different cage material
09:25 PM XXCoder: _unreal_: better that than have item go to wrong washington heh
09:25 PM enleth: I'm not 100% sure this is a genuine NSK product, but if not, someone did a pretty decent job making the offer look like it is
09:26 PM XXCoder: it turned around. its at billings, mt now
09:26 PM XXCoder: it was at ohio, traveled from calfornia lol
09:53 PM Rab: enleth, fake NSK bearings is a thing. E.g.: https://www.machinedesign.com/mechanical-motion-systems/article/21835371/the-dangers-of-fake-bearings http://www.stopfakebearings.com/
09:56 PM Rab: I haven't tried the WBA app at from stopfakebearings.com, but it might be worth a shot once yours arrive.
10:18 PM _unreal_: nvz, you live?
10:18 PM _unreal_: nvz, google "dc7600/pd
10:18 PM _unreal_: decent spected pc WITH par port
10:18 PM _unreal_: just needs an expansion port GPU
10:21 PM _unreal_: hay Rab remember that "fake welder" ebay thing?
10:25 PM fjungclaus1 is now known as fjungclaus
11:17 PM Elmo40: anyone use an online g-code simulator tool?
11:17 PM Elmo40: http://chilipeppr.com/tinyg
11:19 PM XXCoder: site dont seem to load. just whiote page
11:20 PM Elmo40: takes a little while
11:20 PM XXCoder: ok