#linuxcnc Logs
Jan 10 2018
#linuxcnc Calendar
12:16 AM CaptHindsight: http://www.intellidrives.com/ kepp getting their marketing emails
12:19 AM CaptHindsight: http://www.intellidrives.com/images/data/Small%20Animal%20PET.jpg
12:19 AM CaptHindsight: finally a small rotary table for machining rodents
12:22 AM `Wolf: thats handy I guess....
12:40 AM CaptHindsight: the sacles for my Bridgeport have been sitting in a box for 1.5 years
12:40 AM CaptHindsight: maybe longer
12:41 AM CaptHindsight: scales even
12:43 AM `Wolf: just have the Z to do on this Jet mill
12:44 AM `Wolf: just found the oddest thing, damn M5x0.8 tap that isn’t
12:45 AM `Wolf: package and the tap both marked m5x0.8, but its actually m6x0.8,,,
12:46 AM CaptHindsight: the job shop that made them marked them wrong
12:46 AM `Wolf: made by hertel
12:46 AM CaptHindsight: what brand wrapper are they in?
12:50 AM `Wolf: ^ Hertel
12:50 AM `Wolf: from enco/MSC
12:50 AM CaptHindsight: In 1993, Kennametal acquired Hertel AG, a tooling systems manufacturer headquartered in Fürth, Germany,
12:50 AM CaptHindsight: https://www.mscdirect.com/products/hertel-products?intcmp=Hertel_ExclusiveBrands_CTA_July2015_v1
12:50 AM CaptHindsight: did you buy them from MSC?
12:50 AM CaptHindsight: I bet they would be happy to know
12:50 AM `Wolf: oo shit, its a STI stap
12:51 AM CaptHindsight: was it a tap for a thread insert?
12:51 AM `Wolf: yeah
12:51 AM `Wolf: I doubt that I ordered it that way, $23 tap lol
12:51 AM CaptHindsight: so they marked it for the size of the insert
12:52 AM `Wolf: https://www.mscdirect.com/product/details/87151817
01:00 AM SpeedEvil: https://www.ebay.co.uk/itm/High-Pressure-Abrasive-Water-Jet-Cutter-Remote-CNC-Plasma-Hydro-Cutting-Steel/322429518277
01:01 AM SpeedEvil: I wish this was rather cheaper
01:06 AM ziper: a bomb?
01:31 AM CaptHindsight: mounted on a robot that walks
01:32 AM CaptHindsight: I bet people would rent it just to see it cut stuff
01:46 AM CaptHindsight: SpeedEvil: wasn't there some ME kid that developed a line of waterjets for less?
01:47 AM SpeedEvil: If you mean teh kickstarter one, it's basically just using really, really low pressure and massive amounts of abrasive
01:47 AM CaptHindsight: http://www.adamlibert.com/Waterjet/
01:48 AM SpeedEvil: It sort of cuts, but at the cost of many pounds of abrasive per inch, which means it very, very rapidly gets cheaper just to send it to someone with an actual waterjet
01:48 AM CaptHindsight: I recall doing a search for pressure amplifiers in China
01:53 AM CaptHindsight: intensifier pumps
01:55 AM SpeedEvil: yeah
01:55 AM CaptHindsight: 690bar operating pressure is in the one you posted
01:55 AM SpeedEvil: I think we discussed this at the initial kickstarter time
01:55 AM CaptHindsight: yeah sounds familiar
01:56 AM CaptHindsight: I must have saved the links
01:56 AM SpeedEvil: the above kickstarter one is way lower pressure and trades that
01:56 AM CaptHindsight: how long has it been 2-3 tears?
01:56 AM SpeedEvil: 'just good enough to get people to buy it and stick it in a corner after using the first bag of abrasive' seems to be the design goal
01:56 AM CaptHindsight: heh
01:57 AM CaptHindsight: wow, 4 years
01:57 AM CaptHindsight: jAN 2014
01:58 AM Wolf__: 690? that all
01:58 AM CaptHindsight: WHAT THE SPECS SAY
01:59 AM Wolf__: system we used in DC when I was working for Flow was 2413bar
01:59 AM CaptHindsight: so only 10K PSI
01:59 AM CaptHindsight: 35K psi
02:00 AM CaptHindsight: https://static.thefabricator.com/a/a-waterjet-pump-primer-4.jpg
02:01 AM CaptHindsight: a project for my air bearing lathe/grinder
02:01 AM Wolf__: iirc they had to replace the heads and pistons on the thing weekly
02:02 AM CaptHindsight: https://content.toolots.com/media/ves_vendors/wysiwyg/vendor73/image002.jpg
02:03 AM CaptHindsight: similar to high pressure diesel injectors
02:05 AM CaptHindsight: https://res.cloudinary.com/engineering-com/image/upload/w_640,h_640,c_limit/Hydraulic_Intensifier_hnirbw.jpg
02:06 AM Wolf__: hmm makes me wonder now how the system was setup there when we were working
02:06 AM Wolf__: pump system was on lowest level of the parking garage
02:07 AM CaptHindsight: hydraulic or electric motors and screw?
02:07 AM Wolf__: 4 diesel pumps
02:08 AM Deejay: moin
02:09 AM CaptHindsight: https://wardjet.com/waterjet/university/pumps
02:09 AM CaptHindsight: Wolf__: maybe direct drive
02:10 AM Wolf__: I know the cutting nozzle was 1/8”
02:14 AM CaptHindsight: there is a waterjet shop a few minute walk from me
02:14 AM CaptHindsight: so I never really thought seriously about making them
02:15 AM Wolf__: after looking at a o-max machine at one of the dealers open house, I never thought about building one either lol
02:16 AM CaptHindsight: http://webcache.googleusercontent.com/search?q=cache:62rj6zFQD04J:www.esabna.com/us/en/education/blog/how-much-does-waterjet-cutting-cost.cfm+&cd=32&hl=en&ct=clnk&gl=us
02:17 AM CaptHindsight: cost of operation ^^
02:19 AM MarcelineVQ: huh, garnet recycling system would pay for itself pretty fast
02:19 AM CaptHindsight: but a waterjet head, plasma cutter, 24" circular saw mounted on a walking robot would be fun
02:20 AM gloops: anything thats finished would be fun
02:50 AM gloops: funny relationship between speed and market value with machining
02:50 AM gloops: an mdf panel ripped out in 20 minutes generates more revenue than intricate carvings that take 5 hours
02:51 AM gloops: people want junk it seems, years of programming to accept chinese junk as standard
02:51 AM archivist: price per unit start selling printer ink :)
02:52 AM gloops: the spped of the machine becomes everything
02:52 AM gloops: speed
02:53 AM gloops: 1 400ipm machine is worth 2 200ipm machines, did it really cost more to build - no
02:54 AM gloops: archivist its the same as any product, the little man has to find a niche or do stuff that is difficult on a large scale
02:54 AM archivist: faster machine needs sturdy legs to stop the wobble
02:54 AM gloops: like stuff that requires operator intelligence
02:55 AM gloops: mine wont wobble, it wont do 400 ipm though
02:55 AM archivist: just look at hass vids to see wobble
02:55 AM archivist: hoss
02:56 AM gloops: if the g code is well done, the gantry shouldnt be lurching from one end to the other building up momentum, once its cutting it should be taking away material in the local area
02:57 AM archivist: "done well" are you hand coding :)
02:57 AM Wolf__: takes too much time
02:57 AM gloops: my max speed will be 320ipm, im expecting more like 200-250
02:57 AM gloops: until i make some rotating nuts
02:58 AM gloops: you can usually specifiy the cutting approach in cam software
02:58 AM gloops: btw how many lines can linuxcnc run ?
02:58 AM Wolf__: all of them?
03:01 AM gloops: ive seen people with other software saying they cant get past x number of lines before it crashes, i think theyre mainly talking about intereference or noise
03:02 AM archivist: line limit is usually a memory limit of low quality hardware
03:03 AM gloops: like the computer?
03:04 AM archivist: some controls are junk in that respect, not linuxcnc though
03:06 AM archivist: if you are doing patterns on material, you should consider hand coding the loop, much smaller file sizes and more control
03:07 AM gloops: not really looked but vector orientated cam should use math much more, than when a mesh is sliced and plotted point by point
03:07 AM gloops: it wouldnt be practical to hand code for many wood things
03:08 AM archivist: well a shape repeated is sort of trivial
03:09 AM gloops: its as quick as draw the object, hit toolpath tab, choose tool, check a few boxes, save - run
03:09 AM archivist: most of the cam software cannot use the maths in linuxcnc gcode
03:09 AM gloops: minutes literally
03:10 AM gloops: i had a snag with circles with my first cuts with the old router - wasnt saving for emc2, it worked ok after that
03:13 AM gloops: the only looming snag i can see is getting 2 motors to work together
03:13 AM gloops: im pretty confident everything else is ok, or wont take much getting ok
03:15 AM gloops: also none of my electronics has been started up for 2 months been stood in unheated garage
03:15 AM gloops: i used to just run it and leave it on a while every couple of days to warm it up and chase the damp out, not been done because parts removed
03:50 AM Deejay: re
03:56 AM gloops: last bit of fettling done, just these brackets to paint
03:57 AM gloops: it will soon all be over!
04:10 AM gloops: https://www.thomsonlinear.com/website/com/eng/products/linear_guides/linear_specialty_bearings/roundway.php
04:12 AM archivist: dont think I will bother with that design
04:12 AM gloops: cant see the advantages
04:14 AM gloops: 30m/sec though...chain isnt usually associated with high speed, thats gonna be going round like hell
04:15 AM gloops: thats 360 times faster than a typical diy router, cant be for cutting applications
04:27 AM SpeedEvil: just fit a chisel
04:43 AM jthornton: morning
04:43 AM XXCoder: heys
04:44 AM XXCoder: gloops: crzy
04:49 AM nallar is now known as Ross
04:51 AM gloops: nearly 70 mph
04:51 AM jthornton: got a photo of the machine?
04:52 AM XXCoder: thts way behind 10000 ipm max on machine I run.
04:52 AM XXCoder: thats 9.47 mph
04:55 AM gloops: just the linear bearings in link above jthornton
04:57 AM gloops: thompson is a real firm, i cant see how the chain gets any traction on a bar, if the chain is touching the bar, cant see any rollers on it
04:57 AM XXCoder: probably heavily preloaded
04:58 AM XXCoder: if it can take that much abuse it can be heavily preloaded and not deform enough to can't move.
04:58 AM XXCoder: imange what would happen if one of those breaks tho lol at 70 mph mac
04:58 AM gloops: ahh the chain rollers are rounded and roll on the bar
04:59 AM XXCoder: yeah
04:59 AM XXCoder: probably made from very hard yet ductable metal
05:00 AM XXCoder: "unforgiving, contaminated environments." probably means it dont care if theres chips and stuff
05:00 AM XXCoder: though I would still protect em. also protect us from it in case it explodes
05:00 AM TurBoss: Hello
05:01 AM XXCoder: hey!
05:01 AM TurBoss: I'm searching for a "special" collect for my spindle
05:01 AM TurBoss: Suhner UAL 25RF
05:01 AM TurBoss: can't find anything...
05:02 AM XXCoder: heh I couldnt find any for my shit router. I decided to buy an er11 and it fit fine
05:02 AM XXCoder: though maybe risk of not cenetred
05:04 AM TurBoss: :|
05:05 AM XXCoder: yeah
05:18 AM TurBoss: I allready bought er11 but they doesn't fit...
05:18 AM XXCoder: it did work on mine lol it sucked worse with er11 so I said fuck it and got chineseium spindle.
05:18 AM TurBoss: and another one or a similar model "UAC 25RF" doesn't fit too
05:18 AM TurBoss: :((
05:19 AM TurBoss: :D
05:19 AM TurBoss: spindle + huangyang vfd?
05:20 AM XXCoder: my machine is too small :)
05:20 AM XXCoder: pwm and 52mm diameter spindle
05:20 AM TurBoss: DC
05:20 AM TurBoss: ohh
05:21 AM XXCoder: its not fancy and all but reasonable.
05:21 AM jthornton: man these linux themes with ridiculous small borders are so stupid I wonder what the idiot was thinking that designed them and the stupid mouse pointers they use
05:21 AM XXCoder: I haven't finished sensor for rpm so it could use pid to hold rpm even under load.
05:22 AM XXCoder: jthornton: I guess it was designed under smaller resolution
05:22 AM XXCoder: I made few themes that used 3 pixel frame. :) yeah good luck with that now.
05:22 AM XXCoder: windowsblinds not linux theme
07:54 AM Deejay: re
07:58 AM Jymmm: er
09:10 AM IchGucksLive: hi
09:10 AM IchGucksLive: XXCoder: did you send all this rain to calafornia as i tolds you
09:29 AM Jymmm: XXCoder: Fuck You! Yes, yes he did and I'm sending it your way! Have a miserable day =)
09:33 AM IchGucksLive: 12 seath reported here
09:46 AM gloops: car went straiht through MOT, that means a free day tommorrow, the project triumphs! fortune favours the brave!
09:50 AM archivist: winter MOTs are silly, too cold out there to fix
09:50 AM Roguish: MOT ?
09:51 AM archivist: annual car examination for safety etc
09:52 AM sync: it is not too cold in the heated shop tho
09:53 AM Roguish: ah. ok. California had those decades ago. no more. just smog equipment checks.
09:53 AM Jymmm: Roguish: We did?
09:53 AM archivist: shop has the machines no more space for cars
09:53 AM Roguish: 60's and 70's
09:54 AM Jymmm: Roguish: ah
09:54 AM Roguish: CHP roadside check points.
09:54 AM Roguish: brakes, lights, etc..... before smog junk.
09:55 AM Roguish: now we should have CHP roadside driver qualification checks.
09:55 AM Jymmm: Sounds like a safety check to bring a vehicle out of "SALVAGE" status.
09:55 AM Roguish: get a lot of drivers off the road....
09:55 AM archivist: brakes, lights emissions, bodywork rust etc
09:57 AM Jymmm: archivist: your car would fail if you had body rust?
09:58 AM archivist: they poke at it to see if it is unsafe
10:02 AM nallar is now known as Ross
10:04 AM Loetmichel: if they poke thru: failed.
10:04 AM Loetmichel: at least in germany ;)
10:05 AM gregcnc: an honest ebay listing? https://www.ebay.com/itm/162843675701
10:07 AM archivist: hehe "You can search for more expensive products in my shop ，The quality of cheap products is low."
10:10 AM archivist: I use sandvik parting off inserts
10:12 AM gregcnc: do you see non sandvik compatible inserts? I don't think i've seen generic Iscar type
10:14 AM gloops: sandvik make decent hand saws
10:14 AM archivist: trouble with parting inserts, you need matching holder
10:15 AM gloops: probably the best of the throwaway saws
10:15 AM archivist: I use the parting insert for normal turning too
10:16 AM gregcnc: Just part of the game with inserts
10:18 AM archivist: a uk firm got a sandvik part and cut it down for the average myford user
10:18 AM gloops: reminds me, some day soon i need to try melting some butyl rubber in the oven, 300C i think it needs
10:18 AM jdh: sounds odiferous
10:19 AM archivist: http://www.greenwood-tools.co.uk/shop/boring-and-parting-tools/kit-q-cut-parting-tool-66276.html
10:19 AM gloops: i dont want it liquid, just enough for a rubber bandage to bond together
10:19 AM gloops: thats how they re-rubber rollers
10:20 AM archivist: note the real sandvik numbers http://www.greenwood-tools.co.uk/shop/indexable-inserts/insert-type-11-66292.html
10:20 AM archivist: then spot a better price https://www.ebay.co.uk/itm/Sandvik-R151-2-200-20-5F-2145-Carbide-2mm-Parting-Off-Inserts-Box-Of-10/222786353459
10:21 AM gregcnc: they make heads that screw on, but it's probably cheaper to cut up a double ended blade to make two.
10:21 AM gregcnc: second hand ebay stuff is often luck
10:22 AM archivist: that seller has 100%
10:22 AM gregcnc: i mean finding what you need
10:23 AM archivist: I still have 8 or 9 in the box I got
10:24 AM gregcnc: I buy most stuff from ebay, recently got two new thinbit holders for 67USD vs ~250USD new
10:25 AM gloops: ill keep an eye out on the boot sale for inserts if people use them, seen loads for pennies, i dont use them
10:25 AM archivist: I get a holder then google for inserts to fit
10:26 AM gregcnc: i google inserts first to make sure they aren't ancient
10:26 AM gloops: i might have a couple of bigger tool holders, sold what i had, my lathe only takes 3/8ths tool max, a few bits of hss do most jobs i want
10:27 AM gloops: sold most of what i had
10:28 AM archivist: you can make a new tool post to fit
10:28 AM gloops: very awkward with this lathe
10:29 AM gloops: it has britannias ingenious tool height adjustmment post
10:36 AM gloops: lathe in derby https://www.ebay.co.uk/itm/Lathe/162834422049?
10:37 AM archivist: old drummon...yuk
10:38 AM archivist: hehe they have painted the working surfaces !
10:39 AM gloops: soon get that off
10:40 AM archivist: I made a new bearing for someones Drummond, horrid thing
10:41 AM gloops: you can cnc those, ballscrew down the middle, stays clean
10:41 AM gloops: i think thats the same paint im using lol
10:41 AM archivist: lidl grey
10:42 AM archivist: http://www.collection.archivist.info/thumbs/archive/DJCPD/PD/2015/2015_09_04_filing_machine/IMG_1973_T.JPG
10:42 AM gloops: someone who works on pylons gave me this, strange paint
10:43 AM gloops: thats lidl grey? nice colour
10:43 AM archivist: those pylon painters are strange people
10:44 AM archivist: there was a documentary some years ago on them
10:44 AM gloops: yes, he came into the club one night 'anyone want a job £1200 a week' all the heads shot up
10:44 AM gloops: what doing ? painting pylons - groans heads down
10:44 AM archivist: wrecks knees, not afraid of heights
10:45 AM gloops: mad
10:45 AM archivist: I have forgotton how many per day they do
10:45 AM gloops: and live wire as well
10:46 AM archivist: they are earthed hanging on the metal :)
10:46 AM gloops: can really fall off if using 2 clips
10:47 AM gloops: cant
10:50 AM archivist: I found a pic of me as a kid a few months ago, Im sitting on top of a garden swing using it as a climbing frame
10:52 AM gloops: too much cotton wool these days
11:11 AM hazzy: Do you all put lighter weight oil in your compressor in the winter? Mine does not like to start when its cold
11:11 AM hazzy: Maybe I just need a new compressor :)
11:12 AM roycroft: i just live where it doesn't get that cold :)
11:13 AM archivist: never changed the oil in my compressor!
11:13 AM archivist: I expect it to wear out before the oil does
11:13 AM roycroft: i change it every year or so, when i remember
11:13 AM roycroft: probably more than is necessary
11:13 AM roycroft: it always drains out nice and clean
11:14 AM roycroft: but i'm on my third pump on that compressor, and paid a premium for a good, us-made pump
11:14 AM archivist: I have one of the real cheap ones
11:14 AM roycroft: i'm not inclined to replace it again
11:15 AM roycroft: i'm on my second motor for it too, and the current motor is a us-made leeson
11:15 AM roycroft: the motor is at least 10 years old
11:16 AM roycroft: i can't seem to get a decent unloader for the thing though
11:17 AM hazzy: Mine does not have a unloader, I bet that would help a LOT
11:17 AM roycroft: i've gone through a half dozen of them, and they all leak down more than their rating
11:18 AM roycroft: i still can hold 130psi though, which is plenty of pressure for the stuff that i do
11:19 AM roycroft: some day it would be nice to get a rotary screw compressor
11:19 AM roycroft: piston compressors are so inefficient and noisy
11:28 AM ziper: are roots blowers suitable for that
11:29 AM archivist: roots tend to be large volume at a lower pressure, not impossible though
11:34 AM gregcnc: Hazzy there are synthetic compressor oils
11:36 AM Rab: Re: Drummond, never seen a round column...lathe before. Is there a keyway in the body to keep everything aligned?
11:36 AM archivist: yes underneath
11:37 AM archivist: the leadscrew is in the tube nut is in the slot
11:37 AM Rab: Wall mounting really enhances the weird aspect.
11:38 AM archivist: http://www.lathes.co.uk/drummondroundbed/
11:45 AM archivist: watch that fleabay lathe and see it go for too much considering its age and crude methods
11:56 AM IchGucksLive: hi
12:06 PM miss0r: So yesterday when I closed the door to the shop, Apparently a glass bottle filled with concentrated coolaid liquid dropped from a shelf and exploded all over the following: The cold saw, compressor, tool grinder, tig welder & weldinghelmets x 3 plus alot of cables. All of which are now covered in a sticky sugar sirup with glass mixed in it. Its a hellova mess! :-/
12:15 PM Todd_Z: At least you didn't drink the koolaid"
12:16 PM miss0r: I just wrote koolaid... It was actualy some homemade stuff from my wifes aunt.. That just seemed a little exsessive to write ;)
12:22 PM gloops: someone selling quite a bit of stock bar in the UK https://www.ebay.co.uk/itm/35Kg-Brass-Bronze-Bar-Rod-Model-Rod-Engineer-Live-Steam-Lathe-Milling/312040471227?
12:23 PM gloops: https://www.ebay.co.uk/itm/50kg-Bright-Mild-Steel-Round-Hex-Bar-Rod-Model-Engineer-Live-Steam-Lathe-Milling/312040453986?_
12:23 PM gloops: a few lots
12:56 PM hazzy: Anybody know about RTEMS? Just saw it mentioned in a job posting at a national lab. If it is good enough for nuclear weapons it should be good enough for CNC :D https://www.rtems.org/
12:57 PM IchGucksLive: hazzy: brings in all the hackers
12:59 PM IchGucksLive: late Gn8
01:02 PM CaptHindsight: hazzy: never used it for x86
01:03 PM Rab: CaptHindsight, ever used it for non-x86?
01:04 PM Rab: Apparently it's running this thing: http://www.motioncontrol.org/la2000gen2.html
01:04 PM CaptHindsight: looked at using it on the Embedded Controllers (EC) in laptops and servers
01:05 PM miss0r: What a godawfull mess ! I think I have got it under control now thou !
01:05 PM hazzy: Hah, I knew that if anybody knew about it it would be CaptHindsight!
01:05 PM CaptHindsight: but then AMD and Intel stopped supporting open source for BIOS
01:06 PM CaptHindsight: looking back it was due to all the backdoor stuff needing to be in UEFI
01:07 PM CaptHindsight: hazzy: long ago I used to work with RTOSes like QNX, Psos and similar
01:17 PM Deejay: re
01:22 PM CaptHindsight: hazzy: have to run, but one could port the RT stuff from LCNC
01:23 PM CaptHindsight: but keep it headless since you'll never see accel GPU support in RTEMS
01:24 PM Cromaglious_: hola
01:34 PM gloops: 3 wheel bandsaw for parts only near me, perfect
01:34 PM gloops: bring on the stumps
01:34 PM miss0r: nice
01:36 PM miss0r: Once you get it fixed up nice'n clean - you can send to me free of charge ;)
01:37 PM gloops: its only a little one lol, but the parts will make one with a wide cut
01:38 PM miss0r: hmm. I could realy use a proper band saw
01:38 PM miss0r: I'm getting tired of the limitations of my round cold saw
01:38 PM gloops: doesnt need much power or anything to slice a log nice and steady, ive got a bigger one but that only cuts about 8 inch deep
01:39 PM miss0r: ahh, wood saw, eh?
01:40 PM gloops: yeah for wood not metal, surprised you have got a bandsaw for metal
01:40 PM gloops: havent
01:41 PM miss0r: I've been on the market for a while. I'm having issue finding one with a footprint as small as my coldsaw
01:42 PM gloops: i doubt you will?
01:42 PM miss0r: yeah. I'm a 'little' flexible, but I realy realy do not have any more space to give
01:44 PM gloops: well, bandsaw can run outside, if there is outside space, quiet enough, also easier to handle steel outside
01:44 PM miss0r: gloops: this is the size my saw is: https://imgur.com/a/jbf46
01:44 PM miss0r: it uses a 350x3.0mm HSS blade.
01:45 PM miss0r: and they cost allmost 250eur a pop, so I realy would like to get another saw :)
01:45 PM gloops: seems a good setup as it is
01:45 PM miss0r: Sure, but roundbladed coldsaws are notoriously poor at cutting massive material
01:46 PM miss0r: which is 99% of what that saw does
01:46 PM gloops: power hacksaw maybe
01:46 PM gloops: can lift the arm up out of the way when not in use
01:46 PM miss0r: I'm not saying accuracy is an issue, hehe.. but a power hacksaw ? :D
01:46 PM gloops: yeah very popular
01:47 PM miss0r: realy... ? :o
01:47 PM MarcelineVQ: surprisingly, always seemed like it'd rub the blade dull to me though
01:47 PM gloops: like this https://www.ebay.co.uk/itm/Qualters-and-Smith-Type-6H-Power-Hacksaw-Donkey-Saw-3-Phase/282782286649?
01:48 PM gloops: its another saw you just set cutting and leave
01:49 PM miss0r: ahh... That is what you are talking about ;) I've always referred to thoes as linear coldsaws
01:49 PM miss0r: I have one of thoes outside
01:49 PM gloops: not used?
01:52 PM miss0r: sure, sometimes. but i would much rather have a saw for it all inside in the nice warm shop ;)
01:54 PM gloops: well, a vertical bandsaw works the same, would need some kind of spring loading or something though, unless you want to push it through heh
01:55 PM miss0r: hehe yeah
01:55 PM miss0r: but then again - the saw I have inside here needs me to run it
01:55 PM gloops: quicker than a bandsaw though
01:58 PM miss0r: well, as I said - this kind of saw has some issues. Unless I want a blade with only four teeth around the OD(exaggerated), it bogs down in thicker materials
02:05 PM gloops: thermic lance
02:20 PM gloops: https://www.youtube.com/watch?v=K2wLdhZjKBM
02:21 PM MarcelineVQ: sucks that reminds me I need to do repairs on the mill here :< darn you gloops
02:22 PM MarcelineVQ: *shucks
02:28 PM gloops: big saw Marcel?
02:33 PM MarcelineVQ: pretty big, don't recall the dimensions off-hand
02:34 PM MarcelineVQ: thinking 2 1/2' x 16' cutting area
02:37 PM gloops: fair size then
02:37 PM MarcelineVQ: bigger than we need considering it sees use probably once a year or two
02:40 PM gloops: they have got a big stenner at the local pallet company, donkeys years old, even though the shop has slowly gone automated for many things, the old stenner still sits in the centre, and still gets used all day
02:50 PM miss0r: that wooden saw is actualy doing a pretty good job. lol
02:51 PM gloops: yeah like slicing through butter
02:51 PM fragalot: wooden saw?
02:51 PM fragalot: ebony?
02:51 PM miss0r: <gloops> https://www.youtube.com/watch?v=K2wLdhZjKBM
02:52 PM gloops: slice of beech or cherry that width = ££s
02:52 PM fragalot: oh, a wooden bandsaw
02:52 PM fragalot: they can actually be a lot more rigid than a cheap cast iron one
02:52 PM fragalot: look up matthias wandel's series on them
02:53 PM gloops: i doubt ill make one from wood
02:53 PM miss0r: fragalot I'm actualy somewhat occupied feeding the CNC with material & cleaning up a nasty lemonade concentrate spill....
02:54 PM fragalot: miss0r: oh dear
02:55 PM miss0r: it hit the following stuff quite alot: air compressor, tool grinder, chain hoist, tig welder + 3 helmets & all the cables. two extention cords and my round saw.... !!!
02:56 PM fragalot: how on earth did you manage that
02:56 PM gloops: and before you say anything fragalot, it was definitely lemonade, not lager
02:56 PM MarcelineVQ: "Not sure, I was opening the can with the press, just like anyone else would do"
02:56 PM miss0r: Making a picture...
02:56 PM gloops: lol Marcel
02:56 PM fragalot: haha
02:57 PM gloops: ive had lemonade on the keyboard a few times, terrible stuff
02:58 PM fragalot: put it outside on an ants nest
02:58 PM miss0r: started in the red circle (fell when I closed the door) made impact at the first arrow, then fell in between where the second arrow points: https://imgur.com/a/LXSlu
02:58 PM fragalot: they'll take care of it
02:58 PM miss0r: Between the tool grinder and the saw sits a pile of chains & the compressor
02:58 PM miss0r: *sigh*
02:58 PM fragalot: that's a nifty little frame you're building there on the left
02:59 PM miss0r: hehe. Its an old photo (setup is the same thou). That frame is now installed at a buddy of mines house, retracting and lowering the video projector into the seiling & hiding it out of sight)
03:01 PM fragalot: anyway i'm off - bye guys :-)
03:01 PM miss0r: I hope the graphic helps you understand what a nasty spill we are talking about. It was a glass bottle containing 0.5L of sugary sirup
03:02 PM miss0r: Also: it has been sitting for over 24 hours curing
03:03 PM miss0r: fragalot: I don't recall if you were around - Did you see the successful cut I made with the EDM ?
03:04 PM gloops: 8 minutes left on the round bed https://www.ebay.co.uk/itm/Lathe/162834422049?
03:05 PM miss0r: lol
03:06 PM miss0r: its cute... but what would you want it for?
03:06 PM gloops: i cant believe they even sprayed over the name plate
03:06 PM gloops: they can be cnc'd, ballscrew down the middle
03:06 PM gloops: doesnt get mucky
03:07 PM miss0r: meh :]
03:12 PM gloops: i reckon archivist is sniping that
03:15 PM miss0r: I think he will actualy ;)
03:20 PM miss0r: See you around
03:34 PM CaptHindsight: hazzy: back, the RTEMS guys are very easy to work with
03:54 PM Deejay: gn8
05:22 PM JimPanski: Hi there. I am struggeling with rapid movements on stepper system with 7i76e. anyone there who can help?
05:22 PM JT-Shop: just ask your question
05:23 PM Tom_L: JT-Shop, what's the weather like?
05:23 PM JT-Shop: no one knows if they can help till the question is asked
05:23 PM JT-Shop: wet tom
05:23 PM JT-Shop: Henry is still in the property lol
05:23 PM Tom_L: trying to escape?
05:24 PM JT-Shop: no, just keeping some distance... I brought him a food bowl and water
05:24 PM pfred1: JimPanski you ever setup the current for your motors?
05:24 PM JimPanski: if i jog axis with max velo the stepper makes weired noises after short amount of accelerating
05:24 PM JT-Shop: we might work out an agreement yet lol
05:24 PM Tom_L: hah
05:25 PM pfred1: JimPanski do your motors get hot?
05:25 PM Tom_L: just show him the soup pot
05:25 PM Tom_L: step timing may be off or too fast
05:25 PM JimPanski: the current was set because this machine is a retrofit
05:25 PM pfred1: yeah we're not that far along yet
05:25 PM Tom_L: you may expect more than they can deliver
05:25 PM JT-Shop: or acceleration too high
05:26 PM JimPanski: it was a siemens fm nc
05:26 PM JT-Shop: JimPanski: did you do a stepper test as outlined in the documents?
05:26 PM pfred1: yeah is your step timing right?
05:26 PM JimPanski: i have the machine data...there was set an max accel of 0.8m/s2
05:26 PM pfred1: tht's not step timing
05:27 PM pfred1: you need a certain length of pulse
05:27 PM Tom_L: we're talking about how big the pulse is
05:27 PM * JT-Shop wanders inside to cook some chow
05:27 PM pfred1: varies from driver to driver
05:27 PM JimPanski: i have set the max accel at the moment at 200mm/s2
05:27 PM Tom_L: JT-Shop, sit next to henry sharpening your axe if he refuses to cooperate
05:27 PM pfred1: I think the default is pretty long isn't it?
05:28 PM JimPanski: the step length and space are 3000
05:28 PM pfred1: tat's actually pretty short
05:28 PM JimPanski: the drives will need at least 2500
05:28 PM CaptHindsight: JimPanski: did the machine ever work properly with LCNC or is this the setup for first runs?
05:28 PM pfred1: then you're good
05:30 PM JimPanski: its the first setup with lcnc
05:30 PM JimPanski: got this machine with missing parts of the simens controller
05:31 PM pcw_mesa: if they are Chinese drives try 5000 ns step length
05:32 PM JimPanski: the drivers are berger lahr.. i have document with it, so i set those timings
05:32 PM pfred1: you might want to try just increasing your timings anyways
05:32 PM pfred1: regardless of what the documentation claims
05:32 PM JimPanski: i also tried timings with greater values..just before i joined the chat :D
05:33 PM pfred1: and you're sure the current is right for the motors?
05:33 PM pfred1: too high makes machines run like crap
05:34 PM JimPanski: actual scale is 1000..also tried other micro stepping with smaller scale..
05:34 PM JimPanski: only with accel very slow accel this doesnt accure
05:36 PM JimPanski: is it possible that my step frequency is to high? those drivers should have a max stepfrequecy of 200khz
05:39 PM pcw_mesa: 1000 steps per mm?
05:39 PM JimPanski: yes
05:40 PM pcw_mesa: maximum velocity?
05:40 PM JimPanski: actually i tried with 300mm/s2
05:41 PM CaptHindsight: looks like you've reached your 200mm/s2 max step velocity in 1 sec
05:41 PM pcw_mesa: 300mm/sec?
05:41 PM pcw_mesa: thats 300 KHz...
05:41 PM CaptHindsight: if his max step freq is 200KHz at 1000 steps per mm then...
05:42 PM CaptHindsight: 200mm/sec is his max velocity
05:42 PM pfred1: pcw_mesa math wizard :)
05:42 PM pfred1: JimPanski what microstepping are you using?
05:43 PM pcw_mesa: 200 mm/s is not reachable with 3000/3000 steplength/stepspace timing
05:43 PM JimPanski: okay...but even if i set the stepping lower with 400scale this happens
05:43 PM CaptHindsight: JimPanski: and what screw pitch if screw driven and no pulleys or other gears involved
05:44 PM pfred1: 400 microsteps?
05:44 PM JimPanski: 1/10 stepping with scale 400
05:44 PM pfred1: ah OK tenth isn't too off the wall
05:45 PM JimPanski: i have 40x10mm spindle which is geared 2:1
05:46 PM pcw_mesa: 10 mm pitch screw at 1/2 stepper speed?
05:47 PM JimPanski: double
05:47 PM CaptHindsight: also try accel at 20mm/s^2, see if the motor moves for up to 10X longer before it stalls
05:48 PM pcw_mesa: sounds like your scale is way off
05:48 PM JimPanski: yes it definitely does..tried for the beginning very slow settings
05:49 PM pcw_mesa: how many steps/ motor turn
05:49 PM JimPanski: if the scale were of wouldnt those axis travel wrong ways?
05:49 PM pfred1: + - determines direction
05:49 PM pfred1: scale off your moves are just wrong lengths
05:49 PM CaptHindsight: will travel by a different amount than expected
05:49 PM JimPanski: no i ment wrong distances sry
05:50 PM CaptHindsight: 200 step per rev motor?
05:50 PM JimPanski: yes checked this also
05:50 PM pcw_mesa: how many step per motor rev?
05:50 PM JimPanski: and i think it was about 18nm
05:51 PM CaptHindsight: 200 step/rev geared 2X so the screw turns twice every rev of the motor...
05:51 PM JimPanski: 5000 steps per rev is set on the drivers..the axis travel with this setting also the right distance
05:52 PM pcw_mesa: 5000 steps/20 mm so scale is 250
05:52 PM JimPanski: its the other way round
05:52 PM JimPanski: stepper makes the double way
05:52 PM pfred1: twofiddy
05:53 PM JimPanski: with the scale 1000 and 5000steps per turn on the drivers the axis travel the right distance
05:54 PM pcw_mesa: ok so 1000 looks right meaning 166 mm/s is fast as you can go assuming 3000/3000 timing
05:54 PM pcw_mesa: probable closer to 120/150 mm/s realisticaly
05:55 PM pcw_mesa: maybe less depending on torque curve
05:55 PM CaptHindsight: do you want it to move that fast?
05:55 PM JimPanski: yeah that would be the amount which i read for rapid movements in the manual of the machine
05:56 PM JimPanski: there i could read 10m/min eilgang
05:56 PM JimPanski: sry rapid
05:57 PM JimPanski: in the plc printout i got the settings for max rapid which were set at 6000mm/min (with the siemens fm-nc)
05:57 PM CaptHindsight: can you try 2500/2500 for pulse
05:58 PM pcw_mesa: that would get you to 200 KHz (and a real 166 mm/sec maxvel)
06:00 PM CaptHindsight: or maybe 2600/2600 first just to be sure we don;t get a different problem of too short a step pulse...
06:00 PM CaptHindsight: then try 2500/2500 if 2600/2600 works
06:02 PM pcw_mesa: OK so 6000 mm/m is a maxvel of 100mm/sec = 1200RPM = pretty fast for a stepmotor
06:04 PM pfred1: yeah my leads get pretty spooky at 1,000 RPM
06:05 PM JimPanski: @CaptHindsigh with 2500/2500 its not better
06:05 PM pfred1: needs more main bearing surface area
06:05 PM CaptHindsight: <JimPanski> and i think it was about 18nm 18newton meters?
06:07 PM CaptHindsight: how big are these motors? have a pic of the machine?
06:07 PM JimPanski: vrdm 31122 50
06:07 PM JimPanski: https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjwzP_lzs7YAhVSJ-wKHaYhDoYQFggsMAA&url=http%3A%2F%2Fwww.hit-karlsruhe.de%2Fhit-mic%2Fprojekte%2FWS_07_Mr_Invitation%2FVRDM311x-DE.pdf&usg=AOvVaw2jO89sLqeEMqDl22i6Rl_h
06:08 PM CaptHindsight: http://file.yizimg.com/146168/2008020101461181.pdf
06:10 PM CaptHindsight: should handle 2K rpm
06:11 PM MarcelineVQ: how do you compute that?
06:12 PM CaptHindsight: MarcelineVQ: torque curves in the data sheet ^^ .pdf
06:13 PM JimPanski_: 2k rpm but with no power :D
06:14 PM MarcelineVQ: thank you. does JimPanski_'s model have the 3:1 gearbox?
06:14 PM CaptHindsight: oh sorry, I was zoomed out
06:15 PM CaptHindsight: read Hz as rpm
06:15 PM JimPanski_: no gearbox from sig...those steppers are attached with belt
06:16 PM CaptHindsight: torque starts to drop off >2000 Hz
06:16 PM JimPanski_: and clutches for overload
06:17 PM CaptHindsight: heh, should have been obvious when the curve reached 50K :)
06:17 PM CaptHindsight: but I'm used to looking at servos
06:17 PM JimPanski_: why i now have a _ attached?! lol
06:17 PM MarcelineVQ: tends to happen after reconnecting too fast after being dropped by the server
06:18 PM MarcelineVQ: Or I should say without being dropped by the server, irc is weird
06:18 PM pcw_mesa: those must be full step Hz
06:19 PM CaptHindsight: try the motor not under load
06:19 PM pcw_mesa: anyway 1/4 torque at 1500 RPM
06:19 PM CaptHindsight: remove the coupler
06:20 PM pcw_mesa: so if you have LinuxCNC's maxvel set too high (> 100 mm/s or so) it will easily stall
06:20 PM JimPanski_: that makes sense
06:22 PM JimPanski_: so now i dont understand why those settings from the former fm-nc had the accel set to 800mm/s2
06:23 PM CaptHindsight: http://forum.strojirenstvi.cz/download/file.php?id=4395 different dta sheet for the same motor
06:27 PM JimPanski_: i read $MA_MAX_AX_ACCEL[AX2]=0.8
06:31 PM JimPanski_: so what should i better do now.. set down max vel that i can handle more accel?
06:32 PM pcw_mesa: thats the tradeoff with stepmotors
06:34 PM JimPanski_: i think with 7000rpm max spindle speed its okay with the about 5500mm velo and a quick accel
06:35 PM pcw_mesa: note that LinuxCNC units are in mm/s
06:37 PM JimPanski_: yes of course..i will now set the velo to 83.3mm and leave the accel
06:38 PM JimPanski_: how much more rate need the stepgen values?
06:39 PM JimPanski_: 20 or 25%?
06:55 PM pcw_mesa: they should not be critical, just somewhat larger than minimums (though polarity needs to be right)
06:57 PM JimPanski_: ok..will test this tomorrow have to leave now...its quite late! thanks at all for your help
07:16 PM Crom: just spent $1300 at home depot
07:16 PM `Wolf: thats all?
07:17 PM MarcelineVQ: got your air miles?
07:17 PM CaptHindsight: Crom: are you near the CA mud slides?
07:17 PM Crom: SDS Plus Rotary Hammer 3 mode, Super Sawzall 15amp, all the SDS bits from 1/4" to 3/4"
07:18 PM Crom: Capt" At least 2 hours
07:18 PM CaptHindsight: wow do you use an SDS that much?
07:19 PM Crom: Between me, my brother, and my dad -- yes
07:19 PM CaptHindsight: https://www.amazon.com/Core-Bit-Set-Diamond-Coring/dp/B00NPEW5YC only $450 for the set
07:20 PM CaptHindsight: https://www.amazon.com/DRILL-CONCRETE-CORING-BLUEROCK-TOOLS/dp/B001024SNC/ref=pd_lpo_vtph_469_bs_t_1 $240 for the drill
07:21 PM CaptHindsight: I always end up with rebar so I just bore everything with these now
07:22 PM CaptHindsight: I usually find 1 source on Amazon with a deal on one diamond bit
07:23 PM CaptHindsight: I made the mistake of renting and it cost me 1/2 as much
07:24 PM sync: I have a hilti core drill, so far it has not let me down
07:27 PM Crom: I paid $270 for the SDS Plus, $180 for the Super Sawzall
07:28 PM Crom: also got 2 LED 4' shop lights 4000 Lumens 4000K color, whole bunch of wifi Leviton outlets, switches, dimmers
08:31 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/Z_Motormount3.jpg
08:31 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/Z_Motormount2.jpg
08:40 PM Contract_Pilot: Sup...
09:54 PM pfred1: it sure takes a long time to install Gentoo
11:24 PM Crom: UGH... waiting waiting for my wifi range extenders, waiting for my NEMA24's, waiting for my CNCfusion kit. waiting for the 33686 paulCNC kit, waiting for my Sheldon steady rest
11:32 PM * roycroft is waiting on stuff too
11:33 PM MarcelineVQ: but wait.. there's more!
11:33 PM roycroft: the aliexpress seller says he's waiting for his shipper to get him tracking info
11:33 PM Crom: waiting for my 22" touch screen with HDMI input.
11:33 PM roycroft: i'm assuming what these guys do is give their stuff to a shipper, and when the shipper has a full container it all goes out at once
11:34 PM MarcelineVQ: that sounds likely, the timing for when things leave china has been quite varied in my orders
11:38 PM roycroft: i'm thinking about building some krenov style sawhorses while waiting for parts
11:38 PM roycroft: they would be useful during the rest of the assembly
11:39 PM roycroft: and would keep me busy
11:40 PM roycroft: i'm going to a concert on the coast saturday, so i won't gt much shop time this weekend anyway
11:41 PM MarcelineVQ: neat looking things, if those feet swiveled in they could store nicely
11:41 PM roycroft: they nest pretty well as is
11:42 PM MarcelineVQ: could hang 'em on a wall with swivel, neat things though, less footprint than the ones I have
11:42 PM roycroft: and the bases could always be made with wedged tenons if one really wanted to conserve space when storing
11:44 PM roycroft: i like that they're light weight and tall
11:54 PM MarcelineVQ: yeah tall is good
11:55 PM MarcelineVQ: pretty hard to screw up under something bent right over
11:55 PM roycroft: i'm building my router table the same height as my table saw
11:55 PM roycroft: so it can be used as an outfeed table
11:55 PM MarcelineVQ: right on
11:55 PM roycroft: also, the fence will be removable
11:55 PM roycroft: so i can use it as an assembly table as well
11:56 PM roycroft: ideally i'd have a much bigger shop so i don't have to double up on things like that
11:56 PM roycroft: it takes time to move things around set them back up
11:56 PM roycroft: but i have what i have
11:57 PM MarcelineVQ: if you can find those feet that have a footpedal on them that drop or lift a wheel it's pretty great for making equipment moveable but stable
11:58 PM roycroft: yeah
11:58 PM roycroft: i use double locking casters, and they work out pretty well
11:59 PM roycroft: https://www.amazon.com/gp/product/B00YNIFWNK/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
11:59 PM roycroft: that's what i usually get