#linuxcnc Logs

Dec 26 2017

#linuxcnc Calendar

01:23 AM gloops: hostilities will resume at 9 am today
01:25 AM XXCoder: yay!!
01:30 AM gloops: kinetic wood art, $100 per plan http://www.derekhugger.com/
01:32 AM XXCoder: not 100 each
01:32 AM XXCoder: one is 19 bucks. cheap.
01:33 AM XXCoder: other is 49 bucks
01:36 AM gloops: i only looked at the bird
01:45 AM Contract_Pilot-A: Geting kid ne PC for Christmas he is thien going to give me his Laptop thing has 32gb ram
01:46 AM XXCoder: you sure its not 32 gb hard drive? ;)
01:47 AM gloops: 32 ram? thats a whopping amount of memory
01:48 AM Contract_Pilot-A: nope gis GPU has 8gb ram
01:48 AM Contract_Pilot-A: or 6Gb
01:48 AM Contract_Pilot-A: Should be planty ro run Fusion 360
01:49 AM enleth: gloops: not in 2017, no
01:50 AM gloops: its not? man im behind the times
01:50 AM enleth: in fact, consumer motherboards have been capable of 32GB for about 6-7 years now
01:50 AM enleth: and 64GB is now possible on consumer hardware
01:50 AM enleth: the 16GB modules are a wee bit expensive
01:51 AM gloops: i havent bought a new PC for 10 years so that would explain it
01:51 AM enleth: but a regular middle tier motherboard will happily take them
01:52 AM gloops: i think it will run fusion 360 very well Contract
01:55 AM enleth: AFAIK the two 16GB DDR4 modules I have cost me about $420 and I didn't go for the very cheapest ones to get a slightly higher clocked version
01:55 AM enleth: *AFAIR
01:56 AM enleth: for the same price you can get a very good motherboard with a mid-to-high-end CPU
01:57 AM enleth: throw in another $300 for a good GPU and you're getting a PC for about $1500 that will last another 10 years and still be relevant at the end of that period
01:58 AM gloops: well, no need for what i do, i dont play games or anything like that, actually i have had a couple of laptops and notebooks, but they didnt have that much memory, all the 3D CAD apps work ok with 2-4 gig ram and a 3d graphic card
02:00 AM enleth: in which case you might consider getting some second-hand 8GB SO-DIMM modules for those laptops that see highest workloads, used memory is pretty much universally cheap
02:01 AM enleth: and safe to buy, though you can run an overnight memtest just to be sure as soon as you get them
02:02 AM enleth: there's no such thing as too much RAM
02:05 AM gloops: i agree re too much ram, generating g code for complicated or big 3d models does sometimes freeze the old box up, ill have to upgrade..one day heh
02:05 AM enleth: really look up those $10 used modules on ebay
02:20 AM Deejay: moin
03:01 AM gloops: todays job, motor mountings for X, mount motors
03:05 AM Contract_Pilot-A: I am lookign for replacement Encoder
03:23 AM sync: enleth: the ram situation kinda sucks today
03:23 AM sync: you can easily get 64G, but if you want more one needs to buy server hardware
03:23 AM sync: gloops: my laptop has 32G ram, I would like to have moar
03:24 AM Wolf__: Contract_Pilot: https://www.usdigital.com
03:26 AM Contract_Pilot-A: Current Encoder Setup http://www.stevenrhine.com/wp-content/uploads/2017/12/DDFB0253-B3AC-48D9-A5C5-27E0595DFCFD-1024x768.jpeg
03:26 AM Wolf__: they might have something that will work
03:27 AM enleth: sync: did it not suck ever? it's always been the case that consumer chipsets are limited in the amount of memory they can handle and there are genuine technical reasons for this
03:28 AM sync: "genuine"
03:28 AM sync: more like being cheap
03:29 AM enleth: sync: I mainly don't get the "today" part
03:29 AM enleth: you say it as if it was better in the past
03:29 AM sync: well, in the past you could not get reasonable amounts of ram in consumer hardware
03:31 AM sync: and I'm thinking of upgrading but all the consumer hardware tops out at 64G which is no upgrade at all
03:31 AM sync: (as I have 64G in my machine already)
03:32 AM Contract_Pilot-A: Found a few on ali that ay work just fine nearly direct replacemnt
03:38 AM enleth: sync: supposedly i7-6800K can handle 128GB
03:39 AM enleth: my understanding is, however, that a memory controller capable of handling more than 64GB actually does need to be more complex and bigger, taking more space on the silicon and being more expensive to manufacture
03:39 AM sync: yeah, but 128G is only double of what I have now, I'm looking at 256+
03:39 AM enleth: so it kind of makes sense they don't usually include them on consumer hardware as a huge majority of customers would be paying for something they never used
03:40 AM sync: they are already paying for what they will never use, mostly
03:40 AM archivist: average crappy web app is pushing customers into swap these days
03:41 AM sync: haha, no
03:41 AM sync: not even on 10 year old hardware
03:41 AM enleth: sync: besides, last-gen server hardware isn't that much more expensive than current-gen consumer high-end
03:42 AM sync: yes, but it is last gen
03:42 AM enleth: and will mop the floor with the current-gen pro gamer stuff
03:43 AM enleth: if nothing else, thanks to cache sizes
03:43 AM sync: looking at a dual socket epyc setup currently
03:46 AM enleth: at the moment, I don't really need more than 64GB in a box that's physically next to me, but some of my friends who do use more powerful hardware at home have gone the used server hardware route
03:47 AM enleth: mind you, they're sysadmin, devops and networking people, they had no qualms about putting a 19" rack in the closet
03:48 AM sync: yeah, I would do that as well, but I'd like something in a workstation format
03:48 AM enleth: or getting one of those old school Chieftec Dragon big tower cases that can fit Epyc and Supermicro motherboards
03:51 AM sync: there are plenty of cases that take eatx
03:51 AM sync: but that is the plan
03:52 AM enleth: oh, there's also the guy who decided to sidestep the problem and rents a server with a powerful GPU whenerver he needs it
03:53 AM sync: Yeah, no
03:54 AM enleth: if you're close to the DC and have a fiber connection at home, a remote desktop on such a box is more or less indistinguishable from a local PC
03:55 AM enleth: OVH offers computer farm boxes with gaming GPUs in them, billed per day
03:57 AM enleth: can't recall the prices but I've seen Skyrim streamed from a Xeon/GTX 1080 box at 4k
03:59 AM enleth: I'm sure a Quake veteran would scoff at the horrible 10ms lag, but I couldn't care less and would probably use their service if I ever needed it
05:06 AM gloops: cunningly fashioned some 2 way adjustment plates for my x motors, cant be doing with slack belts on a machine
05:07 AM gloops: but didnt get any bolts for them in..
05:44 AM IchGucksLive: hi
05:46 AM IchGucksLive: hi srk
05:50 AM gloops: howdy
05:53 AM IchGucksLive: gloops: just got the freecud CRC mode working
05:53 AM IchGucksLive: uploading a first light vid
05:54 AM gloops: what is CRC?
05:54 AM IchGucksLive: Cutter Radius Compensation
05:55 AM gloops: ahh
05:56 AM gloops: i will have to get back in to freecad
05:57 AM gloops: anyway bbiab
06:00 AM IchGucksLive: S7YADapFduk
06:00 AM IchGucksLive: https://youtu.be/S7YADapFduk
06:04 AM Deejay: cyclic redudancy checksum
06:04 AM IchGucksLive: later ;-)
06:31 AM uwe_ is now known as uwe
06:32 AM uwe is now known as uwe_
07:08 AM Tom_L: 16°F
07:15 AM jthornton: 3f
07:15 AM jthornton: 30f
07:15 AM Tom_L: it's a bit nippy out this morning
07:59 AM gloops: well, a bit more steel cut, the depressing thing thought now is that its all got to be stripped down completely again if i want to paint it...
08:17 AM archivist: machine with it first to iron out the bugs
08:18 AM gloops: could do yeah - i know it will never get painted though once i start using it lol
08:19 AM gloops: shoul paint woodwork machine it will get the wood grubby
09:45 AM DurvalHenke: IchGucksLive: are you there?
09:58 AM IchGucksLive: hi
09:59 AM IchGucksLive: DurvalHenke: yes
10:00 AM DurvalHenke: hi friend... i would thank you.. but my knowledge of G-code is almost zero.. i got the script working but the machine goes in to a loop .. redoing the job..
10:01 AM DurvalHenke: Thank you again for all your work trying to teach me.. :-)
10:03 AM IchGucksLive: ok you need to hnow THAT you can start youir job on all points
10:03 AM IchGucksLive: as klicking the command with Right mouse
10:03 AM IchGucksLive: saying start from here
10:03 AM IchGucksLive: or as i did in the VIDEO
10:04 AM IchGucksLive: do all on Mcode hack to the CAM
10:04 AM IchGucksLive: so it triggers a Mcode on Toolchange
10:04 AM DurvalHenke: man i will see the video once more.. :-)
10:04 AM IchGucksLive: that moves Z Clear
10:04 AM IchGucksLive: then to Toolchange pos
10:04 AM IchGucksLive: triggers tool off M5
10:05 AM IchGucksLive: and M00
10:05 AM IchGucksLive: now toolchange
10:05 AM IchGucksLive: and with P on key it goes on searching for tool length
10:07 AM DurvalHenke: ok
10:08 AM IchGucksLive: BEST practis is to start on a Z safe command
10:10 AM DurvalHenke: so is possible to put in znullen.ngc all necessary commands and call it on G-code without much hacking.. i use FreeCad and heekscad so i can hack the G-code parser to put znullen.ngc call after the tool change line
10:10 AM DurvalHenke: ?
10:11 AM IchGucksLive: yes
10:12 AM IchGucksLive: or you only do a m0
10:12 AM IchGucksLive: and do a manuell toolchange and rtestart at this point
10:12 AM IchGucksLive: restart
10:12 AM DurvalHenke: thats it.. thank you ..
10:12 AM IchGucksLive: and toolzero with a button on sidepanel
10:15 AM DurvalHenke: i could not join ProbeScreen and toolchange remap on same config.. some problems with glade been called twice .. ..
10:15 AM IchGucksLive: did you start the gladengcgui SIM mashine first to get all the featurers setup
10:16 AM DurvalHenke: for a solution will use your approach as is in your video in youtube
10:16 AM DurvalHenke: Yes..
10:46 AM DurvalHenke: to all .. my config machines with remap and probe are in www.ciclone.com.br/temp
10:46 AM DurvalHenke: http://www.ciclone.com.br/temp
10:46 AM IchGucksLive: what does it what others do not
10:48 AM DurvalHenke: nothing more or less.. but for a newbie as I'm is a good start .
10:48 AM IchGucksLive: so better to get it to the wiki page PROBE
10:51 AM DurvalHenke: Some people learn doing things, with trying before learn (me) . others learn before try (you and almost the population).
10:51 AM gloops: excellent thank you Durval, i might need it someday
10:53 AM gloops: i am building a machine of great expectations atm
10:54 AM jym: gloops: Does it serve beer when you THINK about it?
10:55 AM skunkworks: that will be ver2
10:55 AM gloops: jym interesting idea ill make a note of that for the next one
10:55 AM jym: Better be V0.00001 or it's not worth doing.
10:58 AM IchGucksLive: beer
10:58 AM the_wench: I am not your waitress!
11:01 AM jym: sudo beer
11:23 AM Connor: Trying to figure out if I can somehow add a sensor or switch to detect if the BP is in back-gear or not.. If so, swap the fwd/rev controls... So that fwd is always fwd.
11:25 AM Deejay: re
11:26 AM skunkworks: is this in hal?
12:18 PM Contract_Pilot-A: Encoder Q my Max Spindle Speed is 2,500rpm what is a good resolution for an encoder?
12:18 PM Contract_Pilot-A: Currently have a 2000PPR single ended encoder...
12:19 PM gregcnc_: that's probably plenty
12:29 PM Contract_Pilot-A: Seen 3,500rpm machine have 1,200 figure since i ahve to replace it may as well size it right.
12:30 PM Contract_Pilot-A: I need to replace mine so thinking maybe 1,000?
12:30 PM Contract_Pilot-A: or 1024 or ?
12:43 PM skunkworks: why do you have to replace it?
12:49 PM srk: Contract_Pilot-A: is that for RPM sensing or more complex control like rigid taping?
12:51 PM enleth: Connor: absolutely. a hall effect proximity sensor pointing at the moving gear's face (the one with the dog clutch on top) would probably be the most reliable solution
12:51 PM enleth: if your BP is built like mine, there's a sheet metal cover on top of the backgear compartment, under the varispeed brake
12:51 PM miss0r: goodevening
12:51 PM enleth: puttin a sensor in a small hole in that cover should do the trick
12:52 PM enleth: or even completely underneath it, I think there's enough space between the cover and the gear in up position
01:00 PM Connor: I was thinking something like a micro-switch at the top so that when the clutch lever is engaged it actuates it. Would rather avoid a hall-effect sensor, as that would require additional components..
01:00 PM Connor: Was thinking of using a relay to swap the rev/fwd lines connected to the rotary switch..
01:03 PM enleth: Connor: should work, just make sure the relay is appropriate for the task and won't short circuit the phases when it gets stupid inputs
01:03 PM Connor: Not doing this on the mains, doing this on the VFD REV/FWD inputs. :)
01:03 PM enleth: ah, right
01:05 PM enleth: well, actually, check if you VFD supports more than one reverse input
01:06 PM enleth: I think mine had a control scheme that could handle swapping motor direction on a separate input
01:10 PM Connor: okay.. This doesn't sound right "Contactor at the I/O terminal of the AC Drive. When a contactor is installed between the input side of the AC drive and the power supply, the AC drive must not be started or stopped by switch the contactor on or off. If the AC drive has to operated by the contactor, ensure that the time interval between switching is a least one hour since frequent charge and discharge will shorten the service life of
01:11 PM Connor: Looking to put a lockout switch on the system. Apparently using a contactor isn't a good idea...
01:16 PM roycroft: i'm a big dubious about the minimum cycle time of an hour
01:16 PM roycroft: bit
01:17 PM Connor: Straight out of the manual.. :(
01:17 PM roycroft: contactors are mechanical devices and will fail over time - most often the points will become corroded and will either fail to engage or will fuse
01:18 PM Connor: Yea, but the manual is saying, don't power cycle the VFD more than once a hour, or you damage the large cap's inside of it.
01:18 PM Connor: or shorten their life..
01:18 PM roycroft: but contactors should have an mtbf in terms of thousands of cycles, not hundreds
01:19 PM roycroft: oh, yes, that is true
01:20 PM roycroft: you definitely want to switch the load with the vfd, not with something in between the vfd and the load
01:20 PM roycroft: put the lockout switch before the vfd, not after
01:22 PM roycroft: i'm building a router table at the moment, and the spindle will be controlled by a vfd
01:22 PM enleth: roycroft: this is not what the quoted manual page is about
01:22 PM roycroft: i have a main power switch that will feed a momentary action switch that will engage a latching contactor
01:22 PM enleth: roycroft: the way I understand the quote, it recommends to not put a contactor *before* the VFD either
01:22 PM roycroft: that contactor is what will power the vfd
01:23 PM roycroft: i don't get that, enleth
01:23 PM enleth: I don't either
01:23 PM enleth: but it says that
01:23 PM roycroft: it makes no sense
01:23 PM roycroft: and is unrelated to the real world :)
01:23 PM JT-Shopp: makes no sense to me either, same as pulling the one arm bandit
01:23 PM enleth: well, it basically says "do not cycle the input more often than every hour"
01:23 PM Connor: This is what I have planned. A REV/OFF/FWD switch, E-Stop, Lockout Switch with Key, a Jog REV and JOG FWD and Freq knob.
01:23 PM enleth: which is, kinda, excessive
01:23 PM JT-Shopp: ah that is different
01:23 PM roycroft: on the output side that makes complete sense
01:24 PM Rab: What's their approved procedure for power-cycling the VFD? Maybe it's supposed to be off before you cut master power.
01:24 PM roycroft: what happens if the mains go out?
01:24 PM Rab: If you pull the plug while it's driving a load, I can see how that might be bad.
01:25 PM enleth: looks like their procedure is to have it on at all times during the work shift and use the inhibit input as cutoff
01:25 PM roycroft: what if something goes wrong and you have to push the e-stop?
01:25 PM Connor: Depends on how the E-Stop is wired. Not all estops cut mains power..
01:25 PM enleth: roycroft: I think what the chinese meant, and what might have gotten lost in translation, is "do not put this on a contactor that is activated by machine-on/machine-off signal because it might actuate very often"
01:26 PM Connor: The VFD does have a fault and E-STOP input either of which can be used..
01:26 PM roycroft: there should always be an e-stop that kills power
01:26 PM enleth: roycroft: that sort of makes sense, as it could be excessive - some controls toggle the machine-on signal very frequently
01:27 PM roycroft: yes, i can understand that
01:27 PM roycroft: on my brewery control panel, for example, i have a couple pid controllers that regulate temperature
01:27 PM roycroft: they sometimes cycle dozens of times/minute
01:27 PM enleth: but it got translated to English by another person who probably had no idea *why* the engineer specified that and what are the implications
01:27 PM roycroft: on that system i have contactors that are controlled by actuators on the front panel
01:27 PM enleth: and what kinds of circuits are used in such a machine
01:28 PM roycroft: they pass current to ssds that are controlled by the pid controllers
01:28 PM roycroft: ssds fail closed, so it's unsafe to install them with the load unswitched by anything else
01:28 PM roycroft: but if i relied just on the contactors, at that cycle rate i'd be lucky to get through a single brew day without the contactors fusing
01:30 PM roycroft: on my router table, my intent is to power up the mains, engage the latching contactor, and then control the spindle with the vfd throughout a work session, killing the mains at the end of the day
01:30 PM Connor: I can put the lockout on the common side of the fwd/rev switch but, I'm not sure that would prevent jog
01:30 PM roycroft: but the mains switch is a big paddle switch that i'll use as an e-stop
01:31 PM enleth: BTW, there are e-stop schemes that do not cut VFD power at all, using active braking to stop moving parts, but I have no idea if a typical off-brand VFD comes with enough paperwork to make whatever safety inspection happy about it
01:31 PM roycroft: my intent is to rarely, if ever, engage that while the spindle is running
01:31 PM Connor: Oh.. Well.. I guess I could cut the common to those as well..
01:31 PM pcw_mesa: sort of sounds like the VFD has poor/nonexistant soft-start circuitry on its input
01:31 PM roycroft: but i want to be able to do so
01:32 PM enleth: Connor: one of the general purpose inputs on the VFD might be configurable as "inhibit" or "fast stop"
01:32 PM roycroft: it still should damage the vfd to kill power on the input side, as long as the load stays connected
01:32 PM Connor: http://www.soyan-tech.com/variable-frequency-drive-vfd/high-performance-vfd/variable-frequency-driver-of-cnc-milling.html
01:32 PM roycroft: should not, rather
01:32 PM Connor: that's the VFD, only 1.5KW
01:33 PM enleth: Connor: holding that signal would make it ignore all FWD/REV/jog/whatever inputs altogether
01:34 PM roycroft: my concern would be that if you wire an e-stop to the vfd itself, and the vfd is what fails, you could still have current running to the load after engaging the e-stop
01:34 PM roycroft: which would be pretty dangerous
01:34 PM roycroft: i should think that safety regulators would require an e-stop that kills power to the entire machine
01:35 PM enleth: roycroft: the proper way to do that would probably be to have e-stop pull the inhibit input on the VFD immediately to engage active braking and cut power with an on-delay of 1-2s or whatever the VFD needs to brake to a full stop if it's working correctly
01:36 PM Connor: I'm not going to do all that for a manual mill :)
01:36 PM roycroft: yes, that would be a good, fairly elegant way to do it
01:37 PM roycroft: in lieu of that, an e-stop wired to the vfd to engage braking/shut down cleanly as well as an e-stop that kills power to the whole machine would work
01:37 PM roycroft: that would be simpler to implement, but kind of a hack
01:38 PM enleth: roycroft: I am absolutely sure I've read about safety regulations *requiring* the use of active braking in some cases, at least in Germany (stumbled upon an article referring to e-stop schemes on an EU-centric industrial site, it mentioned German regulations)
01:38 PM roycroft: you start by pressing the "stop the machine" button, and if that does not work you can push the "stop it NOW - i MEAN it" button
01:38 PM enleth: roycroft: and what you just said explains *why* would they require it
01:38 PM roycroft: it would certainly be safer to enage active braking if possible
01:38 PM enleth: cutting power to the VFD will not stop it NOW
01:38 PM enleth: it will coast
01:39 PM roycroft: but should active braking fails, there needs to be another way to shut it down
01:39 PM enleth: unless of course the VFD has emergency automatic braking as a feature
01:39 PM roycroft: without having to run over to the breaker panel and swithc off a breaker
01:39 PM enleth: but that would be clearly stated in the docs
01:40 PM jym: 10ft crowbar == insta BRAKE =)
01:40 PM jym: ...or BREAK
01:40 PM enleth: with machines that have lots of inertia, you either brake on e-stop and trust it to work (or at least, trust the VFD vendor's supplied paperwork to cover your ass in court if it fails), or someone dies/something breaks
01:40 PM enleth: whether you cut the power or not
01:41 PM roycroft: but safety aside, for the moment
01:41 PM roycroft: i still don't understand why killing the input power to the vfd would result in damaging the vfd if done more than once/hour
01:42 PM Connor: The VFD has a E-STop input.. It's a Normal open input.. and when it goes HIGH it stops the drive in the shortest time.
01:42 PM roycroft: or even why it would damage the vfd if it were feeding the load at the time
01:42 PM enleth: roycroft: that's two separate failure modes, actually
01:42 PM Connor: I do not see a inhibit input..
01:42 PM roycroft: i can easily understand how removing the load suddenly could damage the vfd
01:43 PM enleth: Connor: if holding that e-stop input active makes it ignore any start commands, this is inhibit at the same time
01:43 PM roycroft: yes, those are two separate failure modes
01:43 PM roycroft: which is why i stipulated them individually
01:44 PM Connor: Yea, but.. I would prefer a NC circuit and inhibit or E-STOP when Open.
01:44 PM roycroft: fail while idle and fail while operational
01:44 PM roycroft: but again, the mains could fail while in the middle of an operation
01:44 PM roycroft: something beyond the control of the operator
01:44 PM roycroft: i'd be unhappy if my expensive vfd blew up because of that
01:45 PM enleth: roycroft: if the VFD is shitty and only powers the control board from the AC input side, with a power supply independent of the DC bus, it will lose any switching control and the load will cause a voltage spike, I guess
01:45 PM roycroft: or even my cheap one :)
01:45 PM enleth: as the IGBTs close and basically disconnect the moving load
01:45 PM Connor: okay, so they talk about something called Three-line mode.. D1 Forward, D2 Reverse, D3 RUN enabled
01:45 PM Connor: but, what's not clear is if RUN enabled also works with JOG
01:45 PM roycroft: ok, i can see that
01:46 PM enleth: Connor: it should, but you can check it
01:46 PM roycroft: what you're saying is that if the vfd is designed to fail, it will :)
01:46 PM enleth: roycroft: they could have designed it like that to make it cheaper and covered their asses by stating it in the docs
01:46 PM roycroft: in case of power fail, it should have somewhere to dump the load current
01:47 PM roycroft: but it may not
01:47 PM enleth: actually come to think of it, one of my VFDs, a small Toshiba unit, has auto-braking on power loss and it works
01:47 PM enleth: it powers itself off of the back-EMF until the motor stops, then actually shuts off
01:47 PM roycroft: i have spent very little time with my cheap vfds and have not been able to engage any kind of braking on them
01:47 PM `Wolf: npn ftw...
01:48 PM roycroft: when this router table is powered up, which should be fairly soon, i'm going to spend more time working on that
01:48 PM roycroft: mine are huanyang, which from what i can tell are the better quality of the cheap vfds
01:49 PM enleth: roycroft: an INVT unit on my Bridgeport brakes very well, it's configured to stop the spindle in 1.5s and it works
01:49 PM roycroft: good enough that there is a big market in counterfeit huanyangs
01:49 PM enleth: I suppose I'll be able to cut that down further after I install new pulleys
01:49 PM enleth: as the varispeed pulleys contribute a lot of intertia
01:50 PM roycroft: i have a resistor pack for the one i bought for my grinder (which is still, as many of my projects, unfinished)
01:50 PM roycroft: but the grinder vfd does not have the current dumping circuitry
01:50 PM roycroft: i'm not sure if the router table vfd does or not
01:50 PM roycroft: i know it's easy to add to those vfds
01:50 PM enleth: the Toshiba is still better, stopping the lathe in 0.3s from 2000rpm
01:50 PM roycroft: i'm not sure i want or need it for the router table though
01:51 PM enleth: it's kind of surreal to watch the chuck pretty much stop dead right there before you even feel the button click back out
01:51 PM roycroft: that would be nice for some things
01:51 PM roycroft: a lathe especially
01:51 PM enleth: it's a Denford ORAC, small and light spindle, so it's not a huge feat
01:51 PM roycroft: it would be nice to be able to instant-reverse on a lathe or mill, too
01:51 PM roycroft: very useful for tapping
01:52 PM enleth: well, it reverses in 0.6s
01:52 PM enleth: 2000 to 2000
01:52 PM roycroft: the lathes at the school where i got my training had instant reverse
01:52 PM roycroft: no vfds, but 3 phase motors
01:52 PM roycroft: i'm sure "instant" really wasn't "instant"
01:52 PM roycroft: but it was damn fast
01:53 PM enleth: after I first configured it, I spent a while just playing with it, flipping the direction at full speed and watching it stop and go
01:53 PM enleth: looks damn weird, but cool
01:54 PM enleth: and that's without an external braking resistor
01:55 PM roycroft: the huanyang is supposed to do dc braking, but i'll be running my spindle at up to 24,000 rpm
01:55 PM roycroft: and i don't think it will engage dc braking until the spindle is almost stopped
01:55 PM enleth: why wouldn't it?
01:56 PM roycroft: so if i want to stop it in a reasonable amount of time i might need to use the braking resistor
01:56 PM enleth: it's probably configurable too
01:56 PM roycroft: yes, but iirc it's only progrmmable up to 10 or 15Hz
01:56 PM enleth: ah, interesting
01:56 PM enleth: I don't rememer such a limitation in the INVT
01:56 PM roycroft: the intent, i believe, is to do dynamic braking until the spindle is almost stopped, and then switch to dc braking
01:57 PM roycroft: perhaps to protect the spindle motor?
01:57 PM enleth: makes sense I guess
01:57 PM roycroft: if you engage dc braking at 24,000rpm the motor might get pretty hot
01:57 PM roycroft: whereas with dynamic braking it's your external resistor that feels the heat
01:59 PM enleth: you might want to figure out the moment of inertia of the rotor and spindle assembly
01:59 PM gregcnc_: regen braking is much more effective then DC braking at high speeds, according to Lenze manuals
01:59 PM enleth: knowing exactly how much kinetic energy is stored will help configuring it
02:00 PM roycroft: on my vfds dc braking can be set to engage between 0.1Hz and 10.0Hz
02:00 PM enleth: I did the math like this for the servo DC bus capacitance in the Bridgeport, no chance I'd have guessed the correct number
02:01 PM enleth: I did know how heavy each part of the machine is, calculated the moment of inertia for the screws and pulleys, then the energy stored in those and the kinetic energy in the cast iron parts when moving at full speed
02:02 PM enleth: it was actually surprisingly low in absolute terms, but the capacitance required to store the excess energy during active braking was still quite significant
02:03 PM roycroft: the moment of inertia on my router spindle should be fairly low
02:03 PM roycroft: i won't be using large diameter cutters on it
02:04 PM roycroft: there won't be a whole lot of mass, period, and it will all be concentred close to the spindle axis
02:05 PM roycroft: the grinder will be a different story though
02:05 PM roycroft: and it's the thing i want to be able to stop fast
02:05 PM enleth: motorcycle caliper brake?
02:06 PM roycroft: i hope to get dynamic braking working on the vfd
02:07 PM enleth: ah, there's a VFD on that too
02:07 PM enleth: should work, why wouldn't it?
02:07 PM roycroft: iirc on those huanyangs if the circuitry is not present it's about $5 in parts to do it
02:07 PM roycroft: the parts aren't on the vfd
02:07 PM enleth: oh, and BTW, there's a trick for the braking resistor if you don't have one
02:08 PM roycroft: it's just a couple mosfets and a few other components - i think folks say it usually costs them about $5 for the parts if they don't have them
02:09 PM enleth: a small portable kettle (and I mean really small, like 0.5-0.7l, 600-700W at 230VAC, the tourist ones) has just about the right resistance for most motors in the 1-4kW range
02:09 PM roycroft: when i got the parts i hooked up the braking resistor, enabled dynamic braking on the vfd, and it had zero effect
02:09 PM enleth: fill it with water as a buffer and there you go
02:09 PM roycroft: then i read forum posts about it, and opened the vfd up an d found the part of the pcb that was missing the necessary components
02:09 PM enleth: heh, optimization
02:10 PM enleth: but it's interesting that it didn't have that part of the config disabled
02:10 PM roycroft: it would cost money to maintain two versions of firmware
02:10 PM enleth: INVTs come in scalar and vector versions and the scalar version does have the vector drive settings disabled
02:11 PM enleth: they're there, you can even see the factory defaults, but you can't edit them
02:11 PM roycroft: interesting idea about the kettle as a resistor pack
02:12 PM roycroft: one could argue that when you shut down the machine it's time for a nice cup of tea
02:12 PM roycroft: and you could have your spindle heat the water for you
02:12 PM enleth: I think andypugh once admitted to having used one as a braking resistor too
02:12 PM roycroft: and he's british
02:12 PM enleth: or seen one used somewhere?
02:12 PM roycroft: they're always scheming ways to make more tea :)
02:12 PM roycroft: so i believe it
02:14 PM gloops: Merry Brexmas! UK exports at record high as world clamours for British food, whisky and TV
02:14 PM gloops: BRITAIN’S Christmas food and drinks exports are booming thanks to Brexit with global demand for UK goods at an all-time high.
02:14 PM roycroft: anyway, i've been using router tables for decades, and have never had nor never needed any kind of instantaneous braking
02:14 PM gloops: just reading that, tea is a British invention of course
02:14 PM roycroft: so i'm not going to worry about it too much for that project
02:14 PM miss0r: absolutly :P
02:14 PM roycroft: but a belt grinder is a much more scary thing
02:15 PM gregcnc_: about tea https://www.instagram.com/p/BbiQn54jc6U/?hl=en
02:15 PM miss0r: gregcnc_: How is your cnc running?
02:16 PM roycroft: one of the reasons most scots want to stay in the eu is becasue they fear their distillerys will suffer if they lose that market, or it is subject to high tariffs
02:16 PM gregcnc_: I got a programmer for the Lenze drive in the lathe, but haven't poked around the setting yet to see why it coasts to a stop yet.
02:16 PM gloops: roycroft the issue with braking on cnc routers is often about time, tool changing etc
02:16 PM gregcnc_: I'm making a small run of parts today.
02:16 PM gloops: these big router people are obsessed with losing minutes
02:16 PM miss0r: gregcnc_: fingers crossed
02:17 PM roycroft: sure, i get that, gloops
02:17 PM roycroft: my router table is manual though - not cnc
02:17 PM enleth: roycroft: I just imagined a SawStop-esque emergency brake for a belt grinder that slams a braking block into the belt, just ripping it and throwing it off the guides and under the machine. wouln't really make sense, but would be cool
02:17 PM roycroft: so that does not apply to me
02:17 PM gloops: i cant think of too many scenarios where it would be vital to stop a router for safety reasons
02:17 PM roycroft: no
02:18 PM miss0r: sadly, what my workshop realy lacks, is a manual mill. Like a small deckel or something like that. I would love to have that in here
02:18 PM roycroft: but a belt grinder, absolutely
02:18 PM roycroft: i don't know if it's just me, but a belt grinder to me is about the scaries machine in a shop
02:18 PM gloops: maybe if you got your sleeve caught in it, but at 20k rpm you wouldnt have time to react anyway
02:18 PM gregcnc_: a guillotine that just snips the belt
02:18 PM miss0r: roycroft: More scary than a lathe ? :o
02:18 PM roycroft: one does not operate machinery while wearing long sleeves
02:18 PM roycroft: actually, yes, miss0r
02:18 PM roycroft: and i have a healthy respecdt for my lathes
02:19 PM miss0r: roycroft: if you were to look at it from a danger perspective: The lathe has alot more way to realy get a good grab on you, and it has ALOT more torque to follow through once it gets a hold
02:19 PM roycroft: i guess one reason the belt grinder seems scarier is that it generally runs a lot faster than a lathe, and has the same hp as a lathe
02:19 PM miss0r: HUGE grinder or small lathe?
02:19 PM roycroft: also, most parts are hand fed to the belt grinder, while the lathe is usually not so
02:20 PM roycroft: medium grinder and medium lathe?
02:20 PM roycroft: i guess i'm comparing the grinder i'm building, which has a 2hp motor, with my 12x36 lathe, which has a 2hp motor
02:20 PM miss0r: Alright :) I haven't looked at the rating on my belt grinder, but the motor is only about 1/3 of the size of my lathe
02:20 PM enleth: roycroft: I recall an article on machine shop accidents and incidents that had an interestin conclusion: the most dangerous machine tool is a big drill press, because workers have much less respect for it than for a lathe , but it's still perfectly capable of winding a human onto the spindle like spaghetti if it grabs clothing
02:20 PM roycroft: a belt grinder is not very useful with a tiny motor
02:21 PM miss0r: that is the truth :)
02:21 PM roycroft: i think that in industry in general, the most dangerous tool is the box cutter
02:21 PM gloops: hard to say really, a lot of wood machines are potentially lethal, anything with a circular saw blade, planers, cutting blocks
02:21 PM roycroft: for that same reason
02:21 PM miss0r: But you realy need to go all in for you to get caught up in the belt. You can get some nasty grindmarks on your hands/fingers, sure. But the lathe will rip your arm right out'a the socket
02:21 PM roycroft: yes, but with all those tools, the work is generally held or fed by some kind of jig or other device
02:22 PM roycroft: with a belt grinder most commonly it's the operator's hands holding the part, and holding it very close to the belt
02:22 PM gloops: mine wont because the flat belt would slip (touch wood)
02:22 PM enleth: gloops: the circular saw removes limbs with ease but I'd think it rarely kills, you'd have to trip and fall right onto the blade with your chest or face
02:22 PM roycroft: i keep my arms away from the moving parts of the lathe
02:23 PM miss0r: yeah. I guess that is true: lathe vs grinder: lathe: your hands are not near the workpeice very often, but should it grap you, your arm is gone. grinder: your hands are close to the belt at all times, but it will 'only' scratch you.
02:23 PM gloops: enleth easy to plough through your wrist though, main artery
02:23 PM miss0r: I still find the lathe more dangerous :]
02:23 PM gloops: or chop all your fingers and not be able to dial the ambulance
02:23 PM roycroft: the only time i get near the chuck is when i'm filing or sanding, and i have it running really slowly then and take reat care
02:24 PM roycroft: but yes, if a lathe grabs you, the consequences would be rather dire
02:24 PM roycroft: same thing with a table saw
02:24 PM roycroft: stick your fingers in the blade and you will be sad
02:24 PM enleth: gloops: still pretty survivable with a tourniquet, unless you work alone and there's no one around to apply it
02:24 PM miss0r: What is the most dangerous for me on the lathe, is when I cut stuff I am, for whatever reason, unalbe to do a chip break on. I always run it too far
02:24 PM roycroft: but i don't get my fingers near the blade of my table saw for that reason
02:25 PM roycroft: router table - fences, feather boards, push sticks
02:25 PM miss0r: as long as one remembers to NEVER wear jewlery, long sleves, gloves & keep long hair/beard away from moving parts, you are along way on staying alive
02:25 PM roycroft: fingers stay far away from the fast spinning part
02:25 PM roycroft: yes, i keep my hair tied up when i'm operating machinery
02:26 PM roycroft: i rarely wear long sleeves in the shop - only when it's really cold
02:26 PM gloops: theres always that lapse of concentration though, the mind wanders, you reach out to brush some swarf off - too late
02:26 PM `Wolf: and not using rags/towels on spinning things...
02:26 PM roycroft: and even then i always wrap the cuffs of the sleeves tightly around my wrists with masking tape
02:26 PM miss0r: long hair: not realy a concern for me hehe. I'm seriously bald. But I do sport a rather sizeable beard
02:26 PM roycroft: and even then i'll remove the long sleeve shirt when doing certain operations
02:26 PM roycroft: if my beard gets caught in a machine then my face was way way way too close to the machine
02:27 PM roycroft: i don't worry about that
02:27 PM miss0r: the list I wrote coupled with respect for heavy machenery & common sense - there you go. You get to die old
02:27 PM enleth: oh, there's one more thing that will happily kill anyone who trips forward trying to use it - a power hammer
02:27 PM * roycroft is old and he's not dead yet!
02:27 PM enleth: and it's foot pedal controlled too
02:28 PM roycroft: i started work on my router table this weekend
02:28 PM enleth: so you have to lift one foot off the ground and put it on the pedal assembly every time you approach the machine
02:28 PM `Wolf: lol, power hammers are cool, and scary. especially the one in my friends shop
02:28 PM roycroft: and i discovered a benefit that i didn't anticipate
02:28 PM miss0r: roycroft: picture or it didn't happen ;)
02:28 PM gloops: there were some photos posted in a local history group, kids running about in the old mill workings in dresses and loose shirts, mortifying to anyone who works with machines
02:28 PM roycroft: now that i'm building a new router table with a dedicated spindle, my 3hp router that i've been using for decades as my router table router is now available for hand-held use
02:29 PM gloops: they had to get the fluff off the workings
02:29 PM roycroft: i'll get some soon, miss0r
02:29 PM miss0r: 3hp handheld router :o
02:29 PM miss0r: Sounds like something that can run off with you in a hurry
02:29 PM roycroft: it was really nice using the 3hp router with a big pattern bit
02:29 PM roycroft: it's actually the wimpy little routers that are more dangerious when doing big cuts
02:30 PM roycroft: they tend to bog down and bounce around
02:30 PM roycroft: while the big one just kept going
02:30 PM roycroft: i was trimming 3/4" mdf with a 1-1/8" diameter pattern bit
02:30 PM roycroft: removing quite a bit of material
02:30 PM miss0r: Sounds like something that makes a pretty mess
02:31 PM miss0r: Which is why I hardly ever bring wood into the shop
02:31 PM roycroft: that's why i waited until a not rainy day and took the work outside :)
02:31 PM miss0r: Indeed :]
02:31 PM enleth: as for long hair - the safety equipment rack at the Hackerspace shop here contains safety goggles, gloves, ear muffs, dust masks - and hair ties
02:31 PM roycroft: mdf is a great material to use
02:31 PM roycroft: but it makes a tremendous amount of very fine dust
02:31 PM roycroft: i hate working with it in the shop
02:31 PM miss0r: I have this somewhat modified x-carve router here. I've done some wood on it. I've decided not to use it any further until I get around to make a vacuum setup for it
02:31 PM enleth: which reminds me that they probably ran out and have to be topped up
02:32 PM roycroft: i'm an old hippie - the farthest thing from a hipster
02:32 PM roycroft: but i do sport a man bun when working in the shop
02:32 PM roycroft: unless i'm wearing a hat, in which case i tuck my hair into the hat
02:32 PM miss0r: Pardon my lack of english terms... 'man bun' ?
02:32 PM roycroft: that hipster hairdo
02:32 PM miss0r: so.. you're a hipster? :P
02:32 PM roycroft: where they tie their hair up in the back
02:33 PM roycroft: no
02:33 PM Rab: https://www.google.com/search?q=man+bun&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiJva3zwqjYAhUk24MKHTBHD3MQ_AUICigB&biw=1089&bih=1310
02:33 PM miss0r: I'm just messing with you ;)
02:33 PM roycroft: i just stated clearly that i'm a hippie
02:33 PM miss0r: I didn't know one ruled out the other
02:33 PM roycroft: i think that rednecks are more like hipsters than hippies are
02:33 PM roycroft: absolutely they do
02:33 PM miss0r: I guess i'm a little fuzzy on what the term hipster realy covers
02:34 PM roycroft: i define a hipster a someone who is conspicuously inconspicuous
02:34 PM miss0r: lol
02:34 PM roycroft: they reject fashion by developing a hipster fashion that is understated
02:35 PM roycroft: they reject "artisan" products by consuming very particular non-artisan products
02:35 PM Rab: Self-awareness. It means you want to be "hip", aware of esoteric knowledge, placing importance on taste and style.
02:35 PM miss0r: Then I am defenetly no hipster. 'round here its just some dude sporting a beard, wearing thick rimmed black glasses(preferable with no glasses in'em) & wearing a woodland jacket
02:36 PM roycroft: yes, and don't forget the tight jeans
02:36 PM miss0r: I mean... I don't use glasses
02:36 PM miss0r: yeah, I don't use thoes either
02:36 PM roycroft: and the only permissable refreshing beverage is pabst blue ribbon
02:36 PM Rab: I don't think there's much overlap between rednecks and hipsters.
02:36 PM roycroft: coffee is fine, but it had better not have any fancy names or come from starbuck's
02:36 PM roycroft: no, there's not much, rab
02:36 PM miss0r: But I had some issues finding pants a while back. With the fashion stating 'skinny jeans' was the sh*t. Even with thoes 'loose fit' pants, I couldn't get my thighs in'em.
02:37 PM roycroft: my point is not that they're similar
02:37 PM roycroft: but that hippies and hipsters are more dissimilar than rednecks and hipsters
02:37 PM * roycroft wears comfortable, durable clothing
02:37 PM miss0r: I've always used jeans.
02:38 PM roycroft: i wear jeans or duck pants for every day wear
02:38 PM miss0r: But I've always had issues finding pants that fit. I have very strong thighs. usualy my size thighs are coupled with a rather large waste. so if I find a pair I can get my legs into, they are floating around my waste
02:39 PM Rab: Overalls!
02:39 PM roycroft: lunch time
02:39 PM miss0r: Which my wife find more than a little amusing. since I HATE shopping for clothes and this fact dictates I need to go alot of places to find something that fits
02:40 PM miss0r: Rab: I do use overalls alot of the time in the shop. But on occasions I am forced to socialise, and the misses finds it more befitting if I am not wearing thoes on said occasions
02:41 PM miss0r: Also: my jeans do not last too long, since I have a nasty habbit of just going into the shop when I get home wearing my 'social' clothing.
02:42 PM gloops: lol
02:42 PM miss0r: you know: I just go into the shop to do a 3D drawing of something for a project, and end up finding myself shoveling chips out from under the lathe lol
02:43 PM miss0r: There you go: another pair ruined
02:43 PM Rab: miss0r, I wear a leather welder's apron for shop tasks. Quicker than changing.
02:44 PM miss0r: I use a machinist grade lab coat. But it doesn't always safe the lower parts of the pants :)
02:44 PM Rab: Fair point.
02:44 PM gloops: a good fitting smock is probably the best, you can just put it on whenever you walk in the workshop
02:45 PM gloops: some people just have a natural inclination to get oiled up though whatever steps are considered to avoid it
02:45 PM miss0r: Any europeans in here who need a 7.5kw 3phase 400v VFD ? I have two left I'm not gonna need
02:46 PM miss0r: gloops: Yeah, But that is alot of fabric to get caught up in machenery
02:47 PM gloops: i think we're talking about the same thing miss0r - lab type coat
02:48 PM miss0r: ahh. I was thinking you were talking about thoes 'use once' coveralls
02:50 PM miss0r: Have any of you guys ever build your own thead cutting dial for the lathe? (for engaging and disengaging the half-nut)
02:50 PM `Wolf: i’m working on one
02:51 PM miss0r: `Wolf: Where to begin? :)
02:51 PM `Wolf: figuring the gear out
02:51 PM miss0r: Do you have some material you read up on, to get an idea? :)
02:52 PM `Wolf: google lol
02:52 PM miss0r: yeah :)
02:53 PM `Wolf: most of the information is for south bend lathes
02:53 PM `Wolf: but the gear math kinda works for most everything
02:53 PM miss0r: I can hardly find anything for this old Zelenda Zn150. I can hardly find a picture of the model online
02:54 PM miss0r: I will look at 'gear math' for this
02:55 PM `Wolf: just comes down to the thread pitch of you lead screw and dial gear #
02:56 PM miss0r: assuming I would NEVER want to do anything but a single thread operation, this should be quite simple?
02:57 PM `Wolf: the lead tpi + the thread dial tooth count make a difference to what numbers you can start on
02:58 PM `Wolf: depending on the thread TPI you are cutting
02:59 PM miss0r: `wolf: Yeah. I'm having a hard time finding good material on the subject in metric
02:59 PM `Wolf: lucky for me https://i.imgur.com/I2mZPFu.jpg https://i.imgur.com/cJR8hSX.jpg my manual has almost a 1:1 drawing in the parts diagram
02:59 PM `Wolf: yeah, I haven’t looked in to that yet
02:59 PM miss0r: wow, lucky you :)
03:00 PM miss0r: My lathe has a M32x6 acme leadscrew
03:00 PM `Wolf: I think stock this machine had a 16 tooth gear, and a 8tpi lead
03:01 PM `Wolf: 16t dial gear, I printed out a 32 tooth one
03:01 PM miss0r: My lathe looks like this: https://i.machinio.com/medium/1rvunog/422.jpg The picture is of a shorter model thou
03:02 PM `Wolf: ugly ;p
03:02 PM miss0r: also, mine is alot prettyer in the paint :]
03:02 PM `Wolf: give you the answer everyone gave me in here about thread dials and lead screws, just cnc it lol
03:03 PM miss0r: hehe, yeah.
03:03 PM miss0r: I would love to have a cnc lathe, no doubt. But I could never live without a manual one
03:03 PM miss0r: sadly I have no more room in here. If I had I would add a manual mill as well
03:04 PM `Wolf: https://i.imgur.com/LHerrrR.jpg https://i.imgur.com/4H3K4ov.jpg was last nights project
03:04 PM `Wolf: adding the spindle tach
03:04 PM `Wolf: seeing my speed dial is totally off
03:04 PM miss0r: Is that thing fast enough?
03:05 PM `Wolf: spins over 2k in high
03:06 PM `Wolf: 2009 rpm lol
03:06 PM miss0r: As you can see, I have no more room in here: http://picpaste.com/IMG_1313-LgR1Vvpx.JPG http://picpaste.com/IMG_1317-BlWnv4EP.JPG
03:07 PM miss0r: I was thinking about your tach indicator
03:08 PM `Wolf: its a halls effect sensor
03:08 PM `Wolf: just a magnet on the spindle
03:09 PM miss0r: ahh. For whatever reason I saw it as an inductive switch... lol
03:09 PM `Wolf: http://a.co/agQ46rV
03:10 PM `Wolf: yeah same 10mm housing as most of the inductive switches
03:10 PM miss0r: I just added a DRO on the lathe. That will have to do for now. I have decided to trust the speed setting on my lathe :]
03:11 PM `Wolf: I’m waiting on my DROs to ship
03:11 PM `Wolf: can’t wait
03:12 PM `Wolf: because the hand dials are off on that lathe
03:12 PM miss0r: I got a chance to use it yesterday. man was that nice :D
03:12 PM miss0r: I just tested it with the handdials yesterday. It was spot on. well, within 0.005mm(which is the resolution of the linear scales)
03:13 PM miss0r: IRC kills work spirit. I need to get a move on. See you around
03:14 PM `Wolf: I got a cheap 3 axis SNS-3V with 5um/1um scales =)
03:14 PM miss0r: nice
03:14 PM miss0r: This is only a 2 axis. So I need to lock up the top slide when using it
03:14 PM `Wolf: ES-12B w/ 5um scales for the mill as well
03:15 PM miss0r: Luckily, my cnc mill is equipped with 0.5um scales
03:15 PM `Wolf: sounds like much number jitter lol
03:15 PM miss0r: so I get the precision I need from there, should it be nessesary
03:16 PM miss0r: it only reads out in 0.001 increments
03:16 PM miss0r: with surprisingly little jitter actualy
03:16 PM `Wolf: nice
03:16 PM miss0r: good german engineering
03:16 PM miss0r: I need to get going. see you around
03:17 PM `Wolf: I kept going back and forth w/ getting 1um scales for my mill, but I finally decided I don’t really need that much resolution
03:55 PM Contract_Pilot-A: Nap time
04:53 PM Contract_Pilot-A: My hand me down laptop will have Intel Core i7 4700MQ, 32gb ram, and a GTX 770M or 780M 3 or 4gb hope it works ok on fusion 360
04:55 PM gloops: https://knowledge.autodesk.com/support/fusion-360/learn-explore/caas/sfdcarticles/sfdcarticles/System-requirements-for-Autodesk-Fusion-360.html
04:56 PM gloops: it will run it like lightning Contract
04:59 PM Contract_Pilot-A: Fricken laggs on my laptop
05:00 PM Contract_Pilot-A: My little intel 45 onboard graphx sucks
05:03 PM Contract_Pilot-A: 45 Express Chipset I belive is 256 on memory
05:03 PM Contract_Pilot-A: Shared
05:04 PM Contract_Pilot-A: I have 8gb total
05:04 PM Contract_Pilot-A: + it has a 256gb SSD
05:04 PM Contract_Pilot-A: PCIE
05:08 PM Deejay: gn8
05:15 PM duhenke: Hello all .. about latency-test.. my machine sometimes goes to 50000 ns but runs normally on 8000 ns .. if i open a Firefox and move the firefox window around the screen i will got 50000 ns latency
05:15 PM duhenke: I was wondering. if is allowed to use linuxcnc throu
05:16 PM duhenke: trough remote X-Client like X-Quartz or even Xming on Windows..
05:17 PM duhenke: so that the linuxcnc machine will start only in text mode without X-Manager .. when i do that .. the latency test (through remote client ) is always bellow 7000
05:42 PM Tom_L: 17°F low 8°F
06:26 PM skunkworks: -1f
07:33 PM roycroft: this may be common knowledge, but i'm uncommon so that doesn't necessarily apply to me :)
07:33 PM roycroft: i have a love-hate relationship with chip brushes
07:34 PM roycroft: i love that they are cheap and do a good job
07:34 PM roycroft: i hate that they shed all over the place when using them t=o paint
07:34 PM roycroft: but having a small shop, i tend to do a lot of little painting jobs, instead of fewer big ones, and hate cleaning brushes all the time
07:35 PM roycroft: i was advised today to apply a few drops of cynoacrylate adhesive at the base of the ferrule, where the bristles enter, five minutes before using the brush
07:35 PM roycroft: yesterday i put on a coat of sealer/primer and there were brush hairs everywhere - it took me a long time to get them all out
07:35 PM roycroft: today i used the glue before applying the finish coat, and not one hair shed
07:36 PM roycroft: so the hate part of the relationship is gone
07:37 PM MarcelineVQ: oh? very neat, I would have tried syringing silicone into the base myself, haven't had to worry about it yet. I'll try your solution next time it comes up though
07:39 PM roycroft: silicone contamination causes fisheye in paint jobs
07:39 PM roycroft: so if it's not fully cured and especially if you're using an alkyld paint that could cause problems
07:39 PM roycroft: plus, it takes a while to cure
07:40 PM roycroft: the cyanoacrylate is good to go in a couple minutes
07:40 PM roycroft: i've always pulled on the bristles of chip brushes and whacked the brush around for a while before painting with it
07:40 PM MarcelineVQ: I meant as a preventative so it'd be something done ahead of time, haven't had a change to experiment though. painting and I are on unfriendly terms
07:41 PM roycroft: and i usually pull out a lot of hairs
07:41 PM MarcelineVQ: *chance to experiment
07:41 PM roycroft: well i never know what i'm going to use the brush for ahead of time
07:41 PM roycroft: i use them more often when machining than when painting
07:42 PM roycroft: and i don't care if a swarf brush sheds a wee bit
07:42 PM roycroft: when i was told this it seemed so obvious i wondered why i didn't know it 30 years agbo
07:42 PM roycroft: ago
07:42 PM MarcelineVQ: there's something satisfying about the word swarf
07:42 PM roycroft: but oh well, it just goes to show that no matter how old you are there are still new things to learn
07:43 PM roycroft: it's a kind of woody word
07:43 PM roycroft: swarf
07:43 PM MarcelineVQ: er swarf, sworf is appearantly not a good thing
07:43 PM roycroft: not at all tinny
07:43 PM roycroft: chip sounds rather tinny
07:43 PM roycroft: chip chip chip
07:44 PM roycroft: but swarf has a rich, woody tone
09:34 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/Y_Axis_Mockup.jpg
09:35 PM XXCoder: slowly building up :)
09:36 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/All_Axis_Mockup.jpg
09:36 PM Tom_L: just for show
09:37 PM XXCoder: so it will be higher with ballscrew assembly under it?
09:37 PM Tom_L: yes
09:37 PM Tom_L: that's just the plate
09:37 PM XXCoder: awesome allright
10:18 PM XXCoder: https://www.youtube.com/watch?v=HmQG5Et68Bc
11:33 PM C_P-Away is now known as Contract_Pilot-A
11:34 PM Contract_Pilot-A: Week and 1 day almost sinished feeling better