#linuxcnc Logs

Feb 09 2021

#linuxcnc Calendar

01:04 AM Deejay: moin
02:04 AM miss0r: waiting for my stepper controller. I wonder what time window the postage service will drop off an express package within
02:11 AM CaptHindsight: miss0r: how is the thumb? cast on or cast off?
02:11 AM miss0r: still on
02:12 AM miss0r: feels fine though
02:12 AM miss0r: its comming off the 19th, if the x-ray shows all clear
04:08 AM Loetmichel: Hmm, anybody seen an USB3 PCIE card that has TWO internal plugs (aka 4 ports)? I have only 1 pciex1 free in my PC but need two front panel connectors a 2 usb3 ports.
05:03 AM ar: Loetmichel: something like this? https://www.delock.com/produkt/90387/merkmale.html
05:22 AM JT-Cave: morning
05:23 AM XXCoder: yo
05:23 AM XXCoder: this is nuts large printer https://youtu.be/KhBdMpEGH0o
05:23 AM XXCoder: professionally built
05:25 AM ar: XXCoder: a huge bedflinger
05:26 AM XXCoder: yeah
05:26 AM XXCoder: guy have brilliant solution to leveling such a huge bed
05:26 AM XXCoder: simply don't lol
05:32 AM XXCoder: 30 dollar for design files. not bad
05:33 AM XXCoder: looks like most parts is within 180mm, except one 230mm which I think can be just printed in parts
05:35 AM Loetmichel: ar: yes
05:35 AM Loetmichel: thanks
05:37 AM ar: XXCoder: for some reason i get a feeling that his 3030(those are 3030, right?)
05:37 AM ar: XXCoder: extrusions are bent
05:37 AM XXCoder: most seem to be 2020
05:37 AM XXCoder: some 2030s and larger
05:38 AM XXCoder: gantry may be 4040
05:38 AM XXCoder: only way to know for sure is to buy bom
05:57 AM Tom_L: morning
06:12 AM XXCoder: hey
06:12 AM XXCoder: hmm snow day moved forward to thursday
06:47 AM JT-Cave: morning
08:40 AM unterhaus_: where do you get heating pads like that guy used on the giant 3d printer?
10:16 AM unterhaus_: the problem with testing a single axis machine is the gcode is so boring
10:59 AM miss0r: Annoying AF. It would seem my stepper controller is delayed
11:13 AM JT-Cave: the one at the repair shop?
11:17 AM Loetmichel: *HARHAR* Wife just said "welcome back. Look in the hallway on top the shoe cabinet. I found your BMW Convertible key! It was in one of my shoes!" THAT is a place i would have never searched. No idea how that got there! :D
11:27 AM CaptHindsight: unterhaus_: https://youtu.be/AS26azWte3k?t=124
11:48 AM unterhaus_: Cap'n, that's really nice. I really wanted something smaller than the guy used on the giant 3d printer though
11:49 AM unterhaus_: I would have gotten a vaccine except I had to take the dog to the vet and filling out the form is impossible on a phone
11:50 AM unterhaus_: you'd think a hospital would know not to use light grey text on a white background because most of their patients are old people
11:59 AM roycroft: i'm finding more and more websites that think that medium grey text on a black background is appropriate
12:04 PM roycroft: at this point i have no idea when i'll be able to get my vaccines
12:04 PM roycroft: i should be eligible before 1 april, but the queue is really full, so even when i'm eligible it may be weeks before i can get the first one
12:11 PM Roguish: good morning again....
12:40 PM JT-Shop: first part done...
01:29 PM miss0r: JT-Cave: nah. I figured they were too slow :D so I ordered a new one. I still haven't gotte a quote from the repair shop
01:33 PM JT-Shop: hmm I forgot how to get the thread pitch for a metric tap in inches...
01:36 PM JT-Shop: for a moment or three
01:42 PM unterhaus_: don't feel bad, I used to go hoarse in vibration lab reminding students how to do unit conversions
01:43 PM unterhaus_: at some point, engineering schools gave up on english units and so the students aren't used to conversions
01:47 PM JT-Shop: no conversion issue that is burned in deep just a bit of confusion about tpi and pitch then it hit me that metric IS pitch already
01:48 PM unterhaus_: true
01:48 PM unterhaus_: my heating pad search reminded me of the time I bought a pad from McMaster Carr and it wasn't quite as flexible as I needed
01:48 PM unterhaus_: there were sparks
01:49 PM JT-Shop: lol
01:49 PM unterhaus_: melty goodness
01:49 PM JT-Shop: if I was using the knee mill my conversational I wrote would do all the thinking for me
01:59 PM unterhaus_: I'm looking at how to use a servo encoder input for an mpg and i should be downstairs fidgeting with my mill
02:00 PM unterhaus_: have to load the 7i48 firmware into the 7i93
02:25 PM Tom_L: unterhaus_, barrel heater for a large 3d printer heat pad
02:46 PM bjorkintosh: JT-Shop, conversational? as in mazatrol?
03:00 PM JT-Shop: conversational as in JT Control
03:01 PM CaptHindsight: unterhaus_: would you like some conductive carbon in a bucket that you can paint on?
03:01 PM bjorkintosh: ah. created by JT-Shop (as himself)?
03:02 PM bjorkintosh: sorry, JT-*
03:03 PM Tom_L: is the whole of mazatrol conventional?
03:03 PM Tom_L: or just one mode of it?
03:03 PM Tom_L: conversational*
03:04 PM bjorkintosh: it's defined as such.
03:04 PM bjorkintosh: you can use G-code as well.
03:04 PM Tom_L: i knew they were an oddball
03:04 PM Tom_L: but i've never used one
03:04 PM bjorkintosh: it's a PITA because the source file is a hex file.
03:04 PM Tom_L: oh crap
03:04 PM JT-Shop: https://github.com/jethornton/mill_touch_v6
03:06 PM bjorkintosh: this is what mazatrol looks like on the machine: https://www.practicalmachinist.com/vb/attachments/f36/124109d1418193579-mazatrol-cam-t-2-face-grooving-photo1187.jpg
03:06 PM bjorkintosh: very readable.
03:06 PM Tom_L: still an odball
03:06 PM bjorkintosh: outside of the machine, it's just one large text file with nothing but hex.
03:07 PM Tom_L: so it would be difficult to create a post for it
03:07 PM bjorkintosh: you either create it from scratch on the machine or you pay mazak to use their software.
03:08 PM Tom_L: odd enough i just looked an i've got at least one post for mazak
03:08 PM bjorkintosh: their machines read g-code, don't get me wrong.
03:08 PM Tom_L: oh
03:09 PM bjorkintosh: however, if you choose to use mazatrol, you can't just print out the myniftypart.ctm and expect to read it like g-code.
03:09 PM Tom_L: i dunno if it's for lathe or mill but it looks very basic
03:09 PM Tom_L: mazak cam m2 control it says
03:12 PM bjorkintosh: that's what mazatrol (cmt file) looks like: http://pastebin.ubuntu.com/p/JZcbK5qj8h/
03:14 PM bjorkintosh: the image looks nothing like what's generated. and that's exactly how they likes it.
03:17 PM drandlebut: fairly amazinghttps://www.youtube.com/watch?v=EdOrqqWZvLY
03:17 PM bjorkintosh: holy hell.
03:17 PM bjorkintosh: drandlebut, is that your machine?
03:17 PM drandlebut: no!
03:18 PM unterhaus_: CaptHindsight, that floor heating element would work well for me but I only need a very small bit of it
03:18 PM bjorkintosh: damn. that's cool as hell.
03:18 PM unterhaus_: last I priced to floor heater element it was quite expensive
03:18 PM bjorkintosh: but why is the tail rotor so complex?
03:19 PM drandlebut: not sure maybe just availability or for redundancy
03:20 PM bjorkintosh: co-ax contra rotating helicopters don't need tail feathers at all.
03:21 PM bjorkintosh: and are more efficient
03:21 PM bjorkintosh: but that's still pretty damned cool.
03:23 PM drandlebut: Amazing for what looks like completely home-made
03:23 PM CaptHindsight: unterhaus_: https://www.tglobaltechnology.com/product/t69-100-graphite-sheets/
03:24 PM bjorkintosh: it's pretty cool.
03:27 PM JT-Shop: freaking deep freeze here for a week or more
03:28 PM unterhaus_: CaptHindsight how do you heat things with graphite?
03:29 PM CaptHindsight: unterhaus_: if it's also electrically conductive you pass current through it
03:32 PM bjorkintosh: you're building an EDM?
03:35 PM CaptHindsight: just heat not sparks
03:43 PM CaptHindsight: A lawyer using Zoom had to let a judge know that he wasn’t a cat after inadvertently activating a face filter https://twitter.com/MikaelThalen/status/1359209202292428800?s=20
03:47 PM JT-Shop: well hell the profile of the part came out wrong... last pass cut way too much material...
04:09 PM perry_j1987: that was hillarious CaptHindsight
04:10 PM perry_j1987: my old office was in a predominately legal building and it had paper-thin walls
04:10 PM perry_j1987: always was something interesting to hear there heh
04:47 PM roycroft: so i somehow made the drawer for my bandsaw stand a couple mm too wide
04:47 PM roycroft: now it's going to be rather fiddly installing it
04:48 PM Tom_L: JT-Shop, the chill affecting your programming?
04:50 PM JT-Shop: I have no clue what happened, last pass it just cut more off the profile like something moved dunno
04:52 PM JT-Shop: nice it just changed to red ice storm warning
04:52 PM JT-Shop: gotta put some bracing under the carport
04:55 PM Tom_L: we had snow/ice yesterday
04:55 PM Tom_L: not alot
04:58 PM roycroft: our snow is now delayed until saturdsy
04:58 PM roycroft: saturday
04:58 PM roycroft: actually, it's gone now
04:58 PM roycroft: it's just going to rain
04:58 PM roycroft: unless it doesn't
05:11 PM perry_j1987: someone didnt pay the bill roycroft ? :P
05:28 PM roycroft: we get snow teases quite often during the winter, but it very rarely actually snows here
05:28 PM roycroft: often it does minutes from here, but rarely right where i live
05:32 PM perry_j1987: *noses out the curtain at the snow higher than his truck
05:32 PM perry_j1987: i miss it back home in the pacific northwest lol
05:32 PM perry_j1987: way too cold here
05:33 PM flyback: https://www.youtube.com/watch?v=pZmWS1ER-z0
05:34 PM XXCoder: unterhaus: dunno on heated pads too
05:53 PM JT-Cave: making sure the generator batteries are topped off before the ice storm arrives
05:55 PM JT-Cave: ouch Saturday and Sunday night low of 4°F
05:55 PM XXCoder: smart to check up yeah
05:55 PM CaptHindsight: JT-Cave: how are you using your position logger?
05:56 PM roycroft: it looks like we'll stay above freezing all week
05:56 PM JT-Cave: I don't really use it, it was a programming exercise for me to improve the one EMC had
05:56 PM CaptHindsight: we have been below 0F at night for a week now
05:57 PM JT-Cave: yeah but you're a bit north of me...
05:57 PM CaptHindsight: JT-Cave: do you recall a "learning mode" for LCNC? It would store the motions commanded by a gamepad or similar?
05:58 PM JT-Cave: don't recall that
05:58 PM JT-Cave: just a position logger
05:58 PM CaptHindsight: http://linuxcnc.org/docs/2.7/html/config/python-interface.html#_the_tt_linuxcnc_positionlogger_tt_type
05:59 PM JT-Cave: I think it was called teach in or something
05:59 PM CaptHindsight: i seem to recall a thread about how there is some already built in method for recording movements
05:59 PM CaptHindsight: now I can't find it
05:59 PM CaptHindsight: and I recall trying it maybe 12 years ago
06:01 PM CaptHindsight: https://forum.linuxcnc.org/24-hal-components/15846-learn-path-or-teach-motion-any-ideas a discussion you had 10 years ago :)
06:01 PM JT-Cave: you can use the python interface to record positions every x seconds
06:02 PM CaptHindsight: https://forum.linuxcnc.org/10-advanced-configuration/30984-teach-in-for-5-dof-manipulator
06:03 PM JT-Cave: yeah, IIRC I took a look at teach-in.py and improved it a lot
06:03 PM CaptHindsight: my use will be using a joy/gamepad to jog the machine and store the paths
06:04 PM JT-Cave: you will want to use the python position logger with a time value
06:04 PM CaptHindsight: just thinking about this...
06:04 PM JT-Cave: http://linuxcnc.org/docs/2.8/html/config/python-interface.html#_the_tt_linuxcnc_positionlogger_tt_type
06:05 PM CaptHindsight: if i slowly jog around and capture positions say every second, how to now move through the same paths at maybe 10X or 50x the speed?
06:05 PM CaptHindsight: using the recorded positions
06:05 PM JT-Cave: it only captures positions not velocity
06:06 PM CaptHindsight: convert position to G-code, add speeds
06:08 PM CaptHindsight: https://forum.linuxcnc.org/forum/20-g-code/18846-generating-g-code-from-mdi-history-log?limitstart=0
06:13 PM JT-Cave: wow you're digging up some old history lol
06:16 PM * JT-Cave goes out to see if the generator batteries are charged up
06:42 PM perry_j1987: well that came in handy having an mt3 er32 adapter
06:42 PM perry_j1987: always fun when you just happen to have the right tool inhouse already and dont have to wait for it to arrive UPS heh
07:16 PM _unreal_: did it, done it FINALLY...
07:16 PM _unreal_: finally finally finally. got around to building/replacing the Y drive nut on my cnc
07:17 PM _unreal_: been getting really loose as of late and I cant finish the last two parts for the laser etcher with out it because they require fine precision
07:17 PM _unreal_: sigh... NEXT step. clean the work bed up prep it and get the board for milling put into place
07:17 PM _unreal_: sigh
08:37 PM unterhaus: we were supposed to have 8 inches of snow from tomorrow to thursday and now nothing
08:37 PM XXCoder: here snow prediction delayed till thursda
08:37 PM unterhaus: where you at?
08:37 PM XXCoder: tacoma
08:38 PM unterhaus: we might see that in 4-5 days
08:38 PM XXCoder: its far more often predicted snow dont come than it does come
08:39 PM unterhaus: our weather is somewhat more predictable, sometimes it goes south or north of us though
08:39 PM unterhaus: I'm not sure where the storm went that was supposed to snow on us, unless it got here early
08:40 PM unterhaus: makes dinner planning easier
08:40 PM XXCoder: lol here its almost predictable that snow coming in news is wrong
08:48 PM CaptHindsight: $44,050 https://www.shopbottools.com/products/5axis
08:50 PM CaptHindsight: 34” x 34” x 24”, not rigid enough for metals or hardwoods
08:50 PM unterhaus: how much is the adult size version?
08:50 PM XXCoder: great for making casts for metal
08:51 PM unterhaus: I always wonder about websites that have little tiny pictures
08:51 PM unterhaus: do they charge by the bit nowadays?
08:52 PM CaptHindsight: https://www.youtube.com/watch?v=Q9y0Ceq6Edk
08:52 PM CaptHindsight: video of it in action
08:52 PM CaptHindsight: typical t-slot machine
08:54 PM CaptHindsight: unterhaus: lots of pixel bandits from what I figure, they resell stolen pixels
08:55 PM CaptHindsight: i see it on imgur all the time
08:55 PM unterhaus: it's why we can't have nice pictures, I guess
08:56 PM unterhaus: I sat through a workshop on 5 axis calibration, didn't understand a thing
08:57 PM unterhaus: I'm sure the shopbot calibration is pretty far off though, from what little I did learn
08:59 PM XXCoder: isnt sphere better for calbration of 5axis?
09:03 PM CaptHindsight: crazy accuracy specs for a machine that wiggles if you cut jello
09:05 PM * roycroft is making pizza tonight, because it is national pizza day
09:06 PM roycroft: i'm trying to find the downside to making pizza twice in a week instead of just once, and i can't
09:08 PM _unreal_: good lord what a difference installing a new drive nut on Y axis
09:08 PM _unreal_: looks like the drive nut is good for about 800 hours of run time
09:09 PM CaptHindsight: made pizza bread earlier
09:10 PM roycroft: i made the dough from scratch today
09:11 PM _unreal_: yep my accuracy is back
09:11 PM _unreal_: working on etching FINE print
09:11 PM roycroft: i usually don't, because it takes a while
09:11 PM roycroft: but i had to honor national pizza day properly
09:11 PM roycroft: i made a whole wheet crust with olive oil, black pepper, and rosemary
09:12 PM perry_j1987: i havnt had pizza in a while
09:12 PM perry_j1987: can i pick up a slice when i stop by for those allen wrenches?
09:12 PM CaptHindsight: I made bread from scratch yesterday after not doing so for 10 years.. Was almost perfect
09:12 PM roycroft: the pizza will have a red sauce with fresh basil, anchovies, asparagus, black olives, and caramelized onions as the toppings
09:13 PM perry_j1987: ya thats fine sounds tasty :)
09:13 PM roycroft: a mix of mozzarella, feta, and parmigiano-reggiano cheeses
09:14 PM roycroft: i'm almost ready to assemble the pizza - just waiting for the onions to finish
09:15 PM roycroft: it takes about 90 minutes to caramelize them properly
09:32 PM roycroft: and it's in the oven
11:39 PM bjorkintosh: so the famous first ash tray made on a CNC machine at MIT was meant to be a rocker arm cam!
11:39 PM bjorkintosh: https://youtu.be/ob9NV8mmm20
11:40 PM bjorkintosh: http://museum.mit.edu/150/86
11:40 PM bjorkintosh: they used APT II, not G-code. I don't think G-Code even existed at the time.
11:45 PM CaptHindsight: started at the same time
11:46 PM XXCoder: I wonder what they'd think if they saw fancy adder-sibtracter machine
11:46 PM XXCoder: or any high end 5 axis
11:47 PM bjorkintosh: I think they understood that it was possible. I mean, they had 5 axis machines.
11:48 PM XXCoder: https://youtu.be/ob9NV8mmm20?t=1504 micky mouse heh
11:48 PM CaptHindsight: https://medium.com/cnc-life/history-of-cnc-machining-part-2-the-evolution-from-nc-to-cnc-4b9fe1653536
11:49 PM CaptHindsight: http://www.steptools.com/docs/stepnc_api/AptStepMaker.html
11:50 PM CaptHindsight: Electronic Drafting Machine (EDM)
11:51 PM bjorkintosh: right so John Parsons and Frank Stulen invented NC, and all the boys at MIT did was to prefix it with a tiny little C...
11:51 PM bjorkintosh: they just added the C. nothing else!
11:52 PM CaptHindsight: propeller heads
11:52 PM bjorkintosh: quite literally.
11:53 PM CaptHindsight: Steve Jobs did most everything, he took the GUI from Xerox and made it his and invented the iphone
11:53 PM CaptHindsight: or we would still be using command line everywhere
11:53 PM bjorkintosh: let's not forget that he invented telephony and glass
11:53 PM bjorkintosh: and batteries along the way.
11:54 PM CaptHindsight: yes, all good things
11:54 PM bjorkintosh: yes, thank you steve.
11:54 PM bjorkintosh: NO thank you, Douglas Englebart or Ivan Sutherland or Alan Kay.
11:54 PM CaptHindsight: did they all work for Jobs? :)
11:55 PM bjorkintosh: it's in his name ... 'jobs'.
11:55 PM bjorkintosh: he *invented* working.
11:55 PM CaptHindsight: of course!
11:55 PM CaptHindsight: forest for the trees there
11:56 PM bjorkintosh: Why else would he be called Jobs if he didn't invent the very notion of Just. Over. Broke.
11:56 PM bjorkintosh: all you have to do is buy his latest products. you'll know.
11:59 PM bjorkintosh: I don't know about Englebart or Sutherland, but Alan Kay definitely worked at apple at one point.
11:59 PM bjorkintosh: this was a while after Jobs had stolen all his Xerox Parc work.