#linuxcnc Logs
Jul 03 2018
#linuxcnc Calendar
12:37 AM IchGucksLive: hi all
12:40 AM IchGucksLive: last hard summer day in row as weather gets thundry from tomorrow
12:40 AM IchGucksLive: so all hands on deck and keep the fuel level of the trucks in view ;-9
12:40 AM IchGucksLive: im off
01:56 AM Deejay: moin
02:45 AM -!- #linuxcnc mode set to +v by ChanServ
03:04 AM RyanS: does mesa 7i76e care if I use cat5, cat6, shielded or unshealded Ethernet cable?
03:27 AM Wolf__: probably doesn’t matter, but unshielded may work as a antenna
03:29 AM RyanS: yeah im reading this - - suggests using a ground rod http://www.randyray.com/TMC/rf_shielding.htm
03:29 AM Wolf__: … why does it always figure when I design something it ends up 1” bigger then the machine axis that I need ti build it on
03:30 AM Wolf__: for plasma yeah, and only one end of the shield gets earthed
03:30 AM gloops: not sure why you would want mesa for a stepper machine
03:31 AM RyanS: Ethernet
03:31 AM gloops: what advantage does that give?
03:31 AM Wolf__: because of the torch height controller and ethernet
03:32 AM rmu: gloops: step generation in the FPGA leads to much much less jitter and more uniform step pulses
03:32 AM Wolf__: ^ what he said
03:32 AM Wolf__: can use a cheaper mobo setup
03:32 AM rmu: and that amounts to higher achievable acceleration, speeds, less vibration etc...
03:32 AM gloops: will that make any practical difference for cutting shapes out of sheet/plate?
03:33 AM RyanS: USB is terrible as I discovered with my 3d printer
03:33 AM rmu: gloops: that depends ;-)
03:33 AM gloops: rmu theyre stepper motors, you wont be breaking any speed or resolution records anyway
03:33 AM Wolf__: I’m looking at doing a mesa/stepper setup as well
03:33 AM Wolf__: for my plasma machine anyways
03:35 AM RyanS: Ethernet is an industrial standard, usb or i would think parallel ports arn't
03:35 AM Wolf__: parallel ports sorta
03:35 AM gloops: im not saying ethernet isnt any better, i just dont see what practical difference it would make
03:35 AM gloops: given the rest of the machine
03:36 AM Wolf__: rs485 is more industrial standard
03:36 AM rmu: with ethernet, your PC is automatically isolated from the machine
03:36 AM rmu: that may be a factor
03:37 AM RyanS: plasma generate massive EMI I think
03:37 AM Wolf__: only on the HF start
03:38 AM RyanS: what about the arc itself?
03:38 AM Wolf__: depends on the plasma box
03:39 AM gloops: the PC is not often the componenet affected by noise
03:39 AM gloops: component
03:40 AM gloops: you still have drivers, psus, signal cables etc
03:40 AM RyanS: hmm I think hypertherm has pilot arc, you can see the 'flame' if you pull the trigger in the air
03:41 AM RyanS: I wonder if I have to shield the shed
03:41 AM Wolf__: copper mesh the whole thing
03:41 AM Wolf__: =P
03:42 AM gloops: i tried a sheet of lead between vfd and drivers - didnt make any difference
03:42 AM rmu: lead???
03:42 AM Wolf__: needs to be a box
03:42 AM RyanS: how about a giant Faraday cage
03:42 AM gloops: its in a metal box
03:42 AM Wolf__: no, the shield, sheet wont do anything
03:42 AM gloops: all the sheilding isnt worth a penny if you dont ground it right
03:42 AM rmu: gloops: use shielded cables from vfd to motor, and keep an eye on your ground connections
03:43 AM gloops: its all sheilded, cables everything, it took 2 months to get the grounds right
03:43 AM rmu: also shielded cables from stepper drives to steppers is no mistake
03:45 AM gloops: my original thoughts on it were to keep everything well apart - and i had no problems, put everything in a box - loads of problems
03:48 AM Wolf__: box of angry electrons
03:48 AM rmu: gloops: you should keep currents together, avoid situations where a current loop span a "big" area
03:50 AM rmu: gloops: do you still have problems?
03:50 AM RyanS: i read that you connect stepper cable shield to the control cabinet but not to the motor housing
03:50 AM gloops: no i got it sorted finally, run without a snag for quite a few hours now
03:52 AM Wolf__: RyanS: thats how all shields on any wiring should be done, its earthed at one end only, so stepper you do the driver end
03:53 AM gloops: except for the spindle cables heh, some say
03:55 AM gloops: what you dont pick up from the control box tutorials is that every machine and box is slightly different, you might be taking this or that cable in from a different point, attaching grounds in different places, unique fields and poles develop in the box that you (or I anyway) cant really predict or control
03:56 AM gloops: or put another way - there is no page you can google that will tell you why your specific machine is acting strage
03:56 AM gloops: strange
03:57 AM RyanS: how do I determine which end to sheild? I guess the part that 'sends' the power, eg stepper driver?
03:58 AM Wolf__: the end that makes physical sense
03:58 AM gloops: the power cables are shielded to prevent emission, the signal cables are shielded to stop reception
03:58 AM gloops: i think thats right anyway
03:59 AM Wolf__: either way you are using the shield as a antenna and pulling the RFI to earth/ground
04:01 AM RyanS: so is using the ground from mains power enough, seeing as that goes to your house's earth rod?
04:02 AM rmu: that is a trick question ;)
04:02 AM gloops: i grounded the box to the domestic ground, and first grounded everything else to the box
04:02 AM RyanS: no im just guessing
04:03 AM RyanS: I don't know if the mains earth is enough
04:04 AM rmu: RyanS: do you have any other earth potentials available?
04:05 AM gloops: i suppose it depends on the house earth..lol
04:05 AM Wolf__: wouldnt be my first pick
04:06 AM RyanS: it's probably 15m from the shed so maybe not good
04:07 AM gloops: i found a 4 inch piece of ground wire solved all my problems - the trouble is, knowing what needs that ground
04:08 AM Wolf__: think of the shielding as a drain vs calling it a ground
04:08 AM RyanS: oooo https://www.hypertherm.com/Download?fileId=HYP103900&zip=False
04:09 AM RyanS: from the horses mouth
04:10 AM rmu: i would ground the shields of cables carrying power on both ends
04:10 AM Wolf__: yeah, rtfm =P
04:10 AM rmu: signal cable shielding only on one end (leave the other end open)
04:10 AM rmu: ;)
04:11 AM RyanS: driver to stepper is signal?
04:12 AM Wolf__: power
04:12 AM rmu: no, that also is power, in my case at least ;)
04:12 AM * Wolf__ can be wrong once in a while
04:17 AM RyanS: im most worried about inadvertently connecting the plasma earth clamp to the electronics
04:18 AM RyanS: or at least that feeding into the control cabinet
04:24 AM Wolf__: bolt it to the table and put a lead off that point to attach to the work piece
04:34 AM rmu: it will be difficult to keep plasma ground separate from earth ground
04:37 AM RyanS: "Unless noted, use only AWG #6 (16 mm2) welding cable (Hypertherm part no. 047040) for the EMI ground
04:37 AM RyanS: cables shown on the diagram" you what? 16mm2!
05:00 AM miss0r: Apparently the US seller cancelled my order 7 days after it should have been delievered, due to 'out of stock or damaged package'. I realy need to get my hands on one of these motors for a client: B3633-3Y+1000LD+TRIAD+25WAY D. Would any of you know where I can get one that isn't from the far east? (I realy need for it to work, once I get it)
05:01 AM miss0r: gloops, you are good at tracking things down:
05:01 AM miss0r: (12:00:16)<miss0r>Apparently the US seller cancelled my order 7 days after it should have been delievered, due to 'out of stock or damaged package'. I realy need to get my hands on one of these motors for a client: B3633-3Y+1000LD+TRIAD+25WAY D. Would any of you know where I can get one that isn't from the far east? (I realy need for it to work, once I get it)
05:01 AM gloops: miss0r only with google lol
05:01 AM miss0r: Yeah, that is the angle i'm working too at the moment.
05:02 AM Wolf__: what size is that thing
05:02 AM miss0r: hmm.. about 300mm long ish
05:02 AM Wolf__: and exact match or same ish
05:02 AM miss0r: exact match
05:02 AM gloops: https://www.ebay.com/itm/Rockwell-Automation-Motor-Model-B3633-3Y-1000LD-TRIAD-25WAY-D-/221434742899
05:03 AM gloops: ahh no, bangkok
05:03 AM miss0r: gloops: Yeah, that one is in thailand
05:03 AM miss0r: I wrote them, and asked for a quote on an express shipment
05:03 AM RyanS: maybe it's waiting for tarrifs to be applied :P
05:04 AM miss0r: RyanS: I doubt the seller would refund me and cancel if that was the case :)
05:06 AM gloops: Delivery:
05:06 AM gloops: Estimated between Mon. 16 Jul. and Fri. 3 Aug
05:06 AM gloops: thats actually not bad delivery time from there
05:06 AM Wolf__: looks like that is the only one on the web
05:07 AM miss0r: on my one it says mon. 16th to aug. 31th
05:07 AM miss0r: its for a client of mines surface grinder. It went tits up. motor failed and killed the servo driver in the fall. I have repaired the servo driver, but the motor is still bad.
05:08 AM miss0r: and without it, the surface grinder will never grind again .-/
05:08 AM miss0r: sadly, it is massively integrated with their proprietary controller, so I have to find an exact match
05:08 AM Wolf__: 97 date code?
05:08 AM miss0r: yeah. The one I am replacing is from 01
05:09 AM RyanS: every time I hear Rockwell automation I think of the turbo encabulator video
05:09 AM Wolf__: just need to match the motor size and the encoder count
05:09 AM miss0r: But that doesn't matter, as long as it works :D
05:09 AM gloops: well, looks like the thai seller has 3 - might be an idea to get them all, might never see one again
05:09 AM miss0r: Wolf__: Indeed, but the hard part about this would be the encoder. it is quite special on these models
05:10 AM miss0r: maybe, just maybe, one of them will work - or I can make one functional one from the three: shaft from one, primary windings from another & the encoder for the last one
05:10 AM Wolf__: just need to know the count and what the output is
05:10 AM miss0r: wolf__: I guess. I haven't read into all the details, but I've been told its not that straight forward with these.
05:11 AM miss0r: something about the signal from the encoder not being regular
05:11 AM RyanS: I hope that motor suppresses sinusoidal depleneration :-)
05:12 AM Wolf__: well, you have access to the encoder so at least you have clues to whats needed
05:12 AM miss0r: heh. if all of them works, I could use one for my cnc lathe :D
05:13 AM miss0r: Yeah, I'll have to go to the factory and remove the motor again. I left it all installed after last visit. (I'm on a three week vacation at the moment), and I would like to have the parts once I get back
05:13 AM Wolf__: where are you located?
05:13 AM miss0r: I hope the encoder on here is not as horrible to work with as the linear scales on my cnc mill.
05:13 AM miss0r: Wolf__: Denmark
05:14 AM Wolf__: not local to me lol
05:14 AM miss0r: not local to most of you :]
05:15 AM Wolf__: lol
05:15 AM miss0r: looking at that chinesium picture there, it looks like it has some nasty dings in the label. I wonder if those have actualy damaged the housing
05:15 AM miss0r: The triangular one in particular
05:15 AM RyanS: could be worse, Iceland
05:16 AM miss0r: Atleast iceland has cheap power
05:16 AM Wolf__: https://www.usdigital.com has a compatibility guide
05:17 AM RyanS: I feel cold even watching a Nordic tv show, don't think I would survive
05:17 AM miss0r: nice
05:17 AM miss0r: RyanS: I think I would melt in about 2.3uS where you are
05:18 AM Wolf__: all the ebay special servo motors I have have their E3 on them
05:19 AM RyanS: Icelandic IT professional to colleague "open the doors, the servers are overheating"
05:19 AM miss0r: hehe
05:20 AM miss0r: Denmark has a pretty nice climate. But theres an issue in summer. We don't get your temperatures, but the humidity here in summer makes it feel much worse
05:20 AM miss0r: My cousin had an australian girlfriend some time ago who made this point
05:21 AM miss0r: I've discovered that the perfect ambient temperature for me is 16c. That is the weather suited for long pants and t-shirt, if you can just sit down and do nothing
05:21 AM Wolf__: same problem here near Washington DC, crazy humid
05:22 AM jthornton-: morning
05:22 AM Tom_L: morning
05:23 AM miss0r: Wolf__: I've visited some friends in louisiana a few times. that place is hot and humid as well - with all the swamps'n stuff. But the thing that makes it worse, is all the airconditioning everywhere. So every time you go outside the door you're hit with a wall of heat :D
05:23 AM miss0r: mornin'
05:23 AM Wolf__: heat index is oddly worse in Maryland vs Louisiana
05:24 AM miss0r: odd :]
05:24 AM Tom_L: 78F
05:24 AM RyanS: there was talk in the past of Iceland's economy focusing on IT due to cheap power and passive cooling, instead they focused on unregulated financial services and went bankrupt
05:24 AM jthornton-: I used to live in Louisiana in LaPlace
05:24 AM RyanS: i think it's fishing and tourism now
05:24 AM Wolf__: heat index here yesterday was 40c/105F
05:25 AM Wolf__: 6am and its 77f/25c w/ 90% humidity lol
05:25 AM miss0r: heat index? is that like the temperature?
05:26 AM Wolf__: temp + humidity
05:26 AM miss0r: its not too bad here at the moment: 27c/34%
05:26 AM miss0r: But we haven't seen a drop of rain for over a month now
05:26 AM miss0r: (with is completely out of character for Denmark)
05:26 AM jthornton-: https://www.weather.gov/ama/heatindex
05:27 AM jthornton- is now known as jthornton
05:27 AM RyanS: what's 'wet bulb' maybe it's a humidity index
05:27 AM Wolf__: jt, you have a plasma table right
05:27 AM jthornton: aye
05:27 AM miss0r: RyanS: Where do you see that ?
05:28 AM Wolf__: whats the bob setup you are running on it?
05:28 AM jthornton: 5i25 7i76
05:28 AM jthornton: THCAD-10
05:29 AM RyanS: apparantly "The wet-bulb temperature is the temperature read by a thermometer covered in water-soaked cloth over which air is passed"
05:30 AM Wolf__: cool, sounds like both RyanS and I are looking at doing 7i76E + THCAD setups
05:30 AM RyanS: linear, unregulated or switching PSU?
05:31 AM miss0r: RyanS: That sounds like something that would have the oposite effect... You know about wrapping you beer in wet cloth and leaving it in the sun to cool? :)
05:32 AM RyanS: I have had the cards on my desk for months
05:32 AM RyanS: beer is horrible
05:32 AM Wolf__: I haven’t ordered yet lol
05:33 AM Wolf__: need to double check which THCAD I need for the hypertherm 1000
05:41 AM miss0r: Bah. It realy seems that the only one I can find on the interwebz is the thailand one. I hope they can ship faster than that
05:44 AM Wolf__: oh wow, hypertherm has the service manual for download, thats nice
05:56 AM Wolf__: jthornton: “resistor can be selected to work with high-frequency start” is there a further explanation of this somewhere?
05:59 AM jthornton: hmmm maybe pcw_home can expand on that
06:01 AM Wolf__: seems my plasma has a direct torch feed 300v max, but its HF start
06:07 AM jthornton: mine is 300v too dunno what start it is
06:08 AM Wolf__: heh, what make is it
06:08 AM jthornton: my THCAD-10 is one of the prototypes so I had to add resistors to it
06:08 AM jthornton: hypertherm 850
06:14 AM Wolf__: weird, cant find any info on the 850
06:56 AM Beachbumpete1: Good Morning LinuxCNC
07:04 AM skunkworks: good morning
07:05 AM skunkworks: you would think i would learn to stop arguing on the internet
07:06 AM skunkworks: (but i am right!)
07:08 AM skunkworks: https://www.cnczone.com/forums/general-cnc-machine-related-electronics/362804-cnc.html
07:09 AM jthornton: oh well looks like CRS hit me again it's a Hypertherm powermax 1250
07:10 AM skunkworks: crs?
07:13 AM rmu: "Cruft Requisition Syndrome"?
07:14 AM skunkworks: ooh good one
07:27 AM jthornton: Can't Remember Shit
07:39 AM Beachbumpete1: skunkie jeez man that guy mactec is a piece of work huh
07:58 AM skunkworks: what do i know.. hih?
08:00 AM skunkworks: huh..
08:05 AM Beachbumpete1: LOL
08:09 AM Beachbumpete1: but but you only have a 500 count encoder hehehe
09:45 AM gloops: Rare Mercedes that took months to lovingly restore is written off in two seconds
09:45 AM gloops: 2 months doesnt seem a long time to restore an old car actually
09:45 AM Loetmichel: ?
09:45 AM SpeedEvil: Depends how much time, labour and restoration.
09:45 AM Loetmichel: did you had an accident?
09:46 AM Loetmichel: have
09:46 AM SpeedEvil: I mean, if it's lightly rusted, and just requires a respray and new tyres, ...
09:46 AM gloops: http://www.dailymail.co.uk/news/article-5912677/Rare-Mercedes-crushed-lamppost-repaired.html?ito=social-twitter_dailymailUK
09:47 AM gloops: pillarless coupe i think, not many of those around now
09:47 AM * Loetmichel BMW convertible has to get complete suspension anew, the ABS controller acts up (tons of stored errors) and its missing a bunch of lamps in the dash... and all that before october when the next technical check by the government is due
09:48 AM SpeedEvil: At some point 'would you 3d print a car' becomes the easier route.
09:48 AM Loetmichel: indeed ;)
09:48 AM Loetmichel: and yes, if i could: i totally would :-)
09:50 AM * Loetmichel is contemplating for a while now to buy two 80kW (peak, 45kw cont.) brushless motors, timing-belt them to the original gearbox of the 318, put a few batteries and electric peripherials ind and a 20kw petrol geneset...
09:50 AM Loetmichel: and make my own "hybrid" ;)
09:51 AM skunkworks: would you need 20kw?
09:57 AM gloops: the car industry is currently dominated by handful of giant manufacturers, with new technology could it ever be the case that small scale companies or individuals could produce cars?
09:57 AM Loetmichel: skunkworks: about 15 for cruise at 120kmh
09:57 AM Loetmichel: kw
09:58 AM Loetmichel: so on average 5 remaining for charging the battery for acceleration
09:59 AM Loetmichel: the idea is that a serial hybrid (as opposed to a parallel one) only needs to have average power+ a bit to provide a good driving impression, becasue rapid acceleration is coming from the batteries
10:00 AM Loetmichel: also a genset that either runs at full throttle or is off is way more efficient than a car engine thats trimmed to be "elastic" over a wide range of throttle positions and RPM
10:01 AM Loetmichel: in conlunction with the recurperative braking it will make for a pretty fuel efficient vehicle that is still fun to drive... also it would get subsidized by the government
10:02 AM Loetmichel: in terms of "no car tax" and "very low insurance"
10:02 AM Loetmichel: conjunction
10:07 AM ziper: that doesnt look like a rare mercedes lmao
10:11 AM gloops: 99% of 'news' stories are sensationalised BS, theyre just trying to sell newspapers
10:11 AM SpeedEvil: I'd much rather they stick to sensationalised car stories tbh.
10:14 AM skunkworks: neat!
10:20 AM IchGucksLive: hi all
10:20 AM IchGucksLive: jthornton, are you going to bild shipjard
10:21 AM IchGucksLive: i got 6 45A plasmas and they do up to 12mm
10:22 AM JT-Shopp: what do you mean IchGucksLive ?
10:22 AM IchGucksLive: 1250 hyper
10:22 AM IchGucksLive: going big like tooltime
10:22 AM gloops: sweden finally score...
10:22 AM IchGucksLive: more power
10:23 AM JT-Shopp: lol I normally cut 11ga or thinner material but sometimes cut up to 1/2"
10:23 AM IchGucksLive: Loetmichel, we gone get hit tomorrow
10:23 AM IchGucksLive: that is 12mm so 60A shoudt do overpower
10:24 AM IchGucksLive: 80A is for 4hr constand 12mm cut
10:24 AM IchGucksLive: all over 125 is shipyard business
10:26 AM IchGucksLive: CubicleNate, now the Great lake area is online here
10:50 AM gloops: switzerland are going home
10:52 AM IchGucksLive: gloops, wear WM in Russia
10:52 AM IchGucksLive: no more african
10:52 AM IchGucksLive: most Old WM are gine
10:52 AM IchGucksLive: england plays next
10:52 AM gloops: england v colombia
10:53 AM gloops: the winner plays sweden - this is the easier way to the final
10:58 AM IchGucksLive: im off till later
11:50 AM IchGucksLive: hi all
11:59 AM IchGucksLive: gloops, one hr to go
12:00 PM gloops: yes Ichs
12:00 PM gloops: destiny is about to smile on England
12:13 PM IchGucksLive: im off a school does not like my design they got no mashine to build but wants to have a Mercedes CNC
12:14 PM IchGucksLive: i told them then the mnoey is going to a other school and now the gov is angry about me v
12:14 PM IchGucksLive: its like the big politics you cand do what you like
12:15 PM IchGucksLive: OH i think here all lights going out in futhere as trump anounces Ramstein to close
12:15 PM IchGucksLive: IRONIC 95% did elekt him here
12:15 PM IchGucksLive: the world is mad
12:16 PM IchGucksLive: gloops, keep pressing thumb
12:18 PM IchGucksLive: gloops, can you see this video
12:19 PM IchGucksLive: https://youtu.be/cqRosVWz-jg
12:19 PM gloops: Ichs if trump does tariff your cars, its the end you know that
12:20 PM IchGucksLive: its a 1080 euro mill all included low cost with bosch 500Watt and tb6600 but 4Nm Direct drive
12:20 PM IchGucksLive: gloops, the end is always at the next stair
12:20 PM gloops: is that what you made for the school?
12:20 PM IchGucksLive: yes
12:21 PM gloops: whats the problem with it?
12:21 PM IchGucksLive: the look
12:21 PM IchGucksLive: im on the mashine tomorrow i will makle a image or even let it run
12:21 PM IchGucksLive: the alu 4A
12:21 PM gloops: looks like a strong design
12:21 PM IchGucksLive: if i can drill the last holes
12:22 PM IchGucksLive: it is ao heavy
12:22 PM IchGucksLive: 4people cand lift it
12:22 PM IchGucksLive: atr full mount
12:22 PM IchGucksLive: lets see i need to load the video cam
12:22 PM IchGucksLive: charge
12:23 PM IchGucksLive: ok im off Gn8
01:25 PM CaptHindsight: https://www.amazon.com/dp/B009EMKMBM/ref=psdc_553402_t1_B00BWYJ9U0 are these tools bad or are the nuts and bolts just the wrong type for this set?
01:27 PM gloops: stanley arent the brand they used to be, but generally ok
01:28 PM Rab: Stanley isn't my idea of a "real" name brand, but I'd be surprised if they didn't fit the named fasteners.
01:28 PM CaptHindsight: so the fasteners are poor not the tools :)
01:29 PM Rab: What's happening?
01:29 PM CaptHindsight: an analogy
01:29 PM CaptHindsight: people buy shit tools and complain about the materials not working well with them
01:30 PM CaptHindsight: idiots or just arrogant?
01:30 PM gloops: you cant put any pressure on chinese nuts
01:30 PM gloops: any tool will slip
01:31 PM CaptHindsight: or both
01:32 PM gloops: ive had a stanley socket set for years, only cracked one socket, on a wheel nut
01:33 PM gloops: i had to drill the stud out, the garage snapped a snap on wheel bar on it
01:56 PM gloops: England comfortably contain Columbia in this important World Cup tie
01:56 PM gloops: half time 0-0
02:13 PM Loetmichel: gloops: i once broke 4 "Tire crosses" on a lorry tire once... then loosened the nuts with a hazet torque wrench and 4 meters of heavvy pipe as an extension with 4 friends hanging from it and rocking...
02:13 PM Loetmichel: it survived without damage at all... was a 1" square drive though
02:19 PM gloops: KANE!
02:29 PM L29Ah: how do i ask linuxcnc to remember the position it is in so it will set it at the next start instead of the one that got saved at the last exit in case i `kill -9` it?
02:46 PM phipli: Hum. Trying to run an AP on a NanoPi Neo2 running Armbian and the AP option from armbian-config (and a couple of different USB wifi dongles). Anyone got any experience with it? It seems to run ok, and I get an ip address for the interface... but I can't see an access point called "ARMBIAN" (the default ssid) on any other devices...
02:57 PM rmu: L29Ah: don't kill -9
02:58 PM L29Ah: i can't say that to my power grid
02:59 PM DaViruz: a ups would probably be simpler
02:59 PM L29Ah: than telling it to save the position not only at exit?
03:00 PM DaViruz: it would be for me as i have no idea how to do that.. :)
03:00 PM rmu: L29Ah: that is not a kill -9, all bets are off what writes will make it to storage
03:02 PM Rab: L29Ah, maybe you're looking for something like this? https://forum.linuxcnc.org/21-axis/30986-axis-position-logger
03:02 PM KimK is now known as kibitzer
03:03 PM L29Ah: rmu: sure, but most of the time my device is stopped so a timely record of its position would make a huge difference wrt usability
03:04 PM kibitzer is now known as KimK
03:04 PM rmu: L29Ah: i would not trust such a value in any case
03:05 PM rmu: stepper systems may loose about 2 steps i think and servo systems don't have brakes engaged without power, so may also move a tiny bit
03:06 PM L29Ah: right, i should bring an ups
03:07 PM rmu: a home-ing operation shouldn take that long or otherwise be inconvenient
03:08 PM L29Ah: it's a 3d printer, so i can't really home unless i install a special device on the table that measures the tool length
03:08 PM rmu: i c
03:09 PM L29Ah: and the homing procedure will be complex enough i don't understand how to integrate it well into linuxcnc
03:09 PM L29Ah: since i can't really "home" from g-code afaiu
03:10 PM rmu: the 3d printers i know don't need that much power, they would run for ours on a simple car battery
03:10 PM L29Ah: yeah
03:11 PM rmu: so perhaps a battery of sufficient voltage and a p-fet as low-drop diode would be sufficient as UPS
03:16 PM rmu: oh you probably have a PC to control the printer, not something self-contained. forget what i said.
03:29 PM Rab: World's ugliest lathe for sale: https://austin.craigslist.org/tls/d/sheldon-metal-lathe-10x24/6631238857.html
03:32 PM Rab: Price is good for this region if it's not completely trashed, but everything in the photos indicates it might have gotten hands-on use by people without much machining experience...not encouraging.
03:38 PM gloops: extra time of extra time!
03:39 PM rmu: boring game
03:40 PM gloops: england do not have a great record on penalty shootouts
03:43 PM gloops: england have won 1 out 7 world cup penalty shootouts
03:44 PM L29Ah: gloops: what do you think of the lee sedol vs alphago game?
03:52 PM gloops: england!
03:53 PM rmu: hehe... 2:7
03:53 PM gloops: i dont remember seeing that game specifically L29Ah
03:53 PM gloops: korea played well though
03:57 PM XXCoder: I read about japan losing game, they left locker room very clean and note thanking russia for game
03:58 PM gloops: yes excellent play by japan i enjoyed watching them
03:58 PM XXCoder: time to work. ugh
03:58 PM XXCoder: later
03:59 PM gloops: enjoy
04:13 PM gloops: Rab dont know what made him paint those bits grey
04:15 PM Deejay: gn8
04:42 PM tjb1: so my teensy has a cycle time of ~1280 microseconds while measuring voltage, setting outputs, and printing to LCD
04:42 PM tjb1: or ~8 microseconds with LCD prints turned off
04:43 PM tjb1: is it worth turning LCD off?
05:17 PM Tom_L: is it?
05:44 PM tjb1: guess ill find out when I test it
11:19 PM tjb1: got it now to only a 3-4 microsecond difference between LCD on and off
11:20 PM tjb1: guess I was printing the output status of height control too often
11:20 PM tjb1: have now changed it to only print if it's different than it was
11:26 PM tjb1: AVG 6.34 with no LCD printing, AVG 7.95 with LCD printing...no need for bypass now