#linuxcnc Logs

Jul 23 2019

#linuxcnc Calendar

12:27 AM ItsFlipp: okay, pullin' my hair out here. I'm getting continuous chip weld during helical ramping with 6061 :C
12:32 AM ItsFlipp: 1/4" end mill, 3 flute, HSS
12:32 AM ItsFlipp: 10k RPM, 20 in/min feed rate during ramp, 6 degree helix, helical ramp diameter of .2375
12:32 AM ItsFlipp: it's basically melting the aluminum as it goes in :C
03:21 AM Deejay: moin
05:08 AM Tom_L: morning
05:26 AM jthornton: morning
05:26 AM Tom_L: nice n cool out this morning
05:26 AM Tom_L: 64F
05:27 AM jthornton: 67°F
05:27 AM XXCoder: was 80f, now 59f
05:35 AM XXCoder: ahh vampire!! oh pink one nm
05:52 AM pink_vampire: hi XXCoder
05:52 AM XXCoder: whats up
05:53 AM pink_vampire: Working on some gcode
05:54 AM XXCoder: nice what ya making
05:55 AM pink_vampire: some wood stuff
05:56 AM XXCoder: cool :)
05:59 AM * Loetmichel is printing parts for industrial/military PCs on three printers in parallel. two do USB drive bays, one does brackets for LED light guides for the front lid ;) ;)
06:00 AM pink_vampire: hope it is not pla
06:00 AM Loetmichel: sure PLA
06:00 AM Loetmichel: why not?
06:02 AM pink_vampire: ‏because it's not heat resistant
06:02 AM XXCoder: doesnt it get even more brittle as it ages? even as printed object
06:03 AM Loetmichel: not a problem
06:03 AM Loetmichel: neitehr heat nor brittle
06:04 AM XXCoder: cool
06:04 AM Loetmichel: the PCs are only rated for +50° max
06:04 AM Loetmichel: so still some headroom
06:05 AM Loetmichel: and the usb ports have aluminium top/bottom, so thats not even a problem if it gets a bit squishy
06:06 AM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=10886
06:06 AM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=10883
06:06 AM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=10880
06:06 AM Loetmichel: made the plastic parts on the mill 'til now
06:07 AM Loetmichel: the alu stays the same, but 3dprinting the spacer and the drum is a LOT easier and less dirt ;)
06:07 AM pink_vampire: it is plastic and metal that come like that?
06:08 AM Loetmichel: hmm?
06:08 AM Loetmichel: can you rephrase that question?
06:08 AM XXCoder: too bad alum printer is so expensive
06:08 AM pink_vampire: you got the material like a sandwich of plastic and metal?
06:09 AM pink_vampire: XXCoder, to print aluminum??
06:09 AM XXCoder: yeah
06:09 AM XXCoder: theres few that can do it
06:09 AM XXCoder: like very expensive sls
06:09 AM pink_vampire: much simpler to print steel
06:09 AM XXCoder: titanium is more preffered tho
06:10 AM pink_vampire: also that
06:11 AM Loetmichel: pink_vampire: nope, that is stacked and then screwed together
06:11 AM pink_vampire: interesting
06:11 AM Loetmichel: https://www.worldofsweets.de/out/pictures/master/product/1/royal-dansk-danish-butter-cookies.jpg <- here made of 8mm Sheet PVC on the mill
06:11 AM Loetmichel: grrr
06:11 AM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=16432&g2_imageViewsIndex=1
06:12 AM Loetmichel: thats the correct link
06:12 AM pink_vampire: I have here somthing part that is metal / plastic sandwich
06:12 AM Loetmichel: i HATE the VNC clipboard handling
06:12 AM pink_vampire: VNC??
06:13 AM Loetmichel: ah, you mean Dibond(r)?
06:13 AM XXCoder: now thats healthy sgheet pvc cookies
06:13 AM Loetmichel: i am in IRC on my home machine, even when at company
06:13 AM Loetmichel: so i VNC home to IRC from here
06:13 AM pink_vampire: no idea, it was something I got years ago
06:14 AM Loetmichel: lets just say it dosent work THAT well when it comes to copying links over
06:14 AM Loetmichel: some times it sends the clipboard contents on its own, sometimes you have to tell it to "send all formats"
06:15 AM pink_vampire: wtf
06:15 AM Loetmichel: thats where the wrong link came from (the cookie one)
06:15 AM pink_vampire: I'm not using vnc
06:16 AM Loetmichel: pink_vampire: THATS dibond: https://de.wikipedia.org/wiki/Dibond
06:17 AM pink_vampire: can't understand
06:17 AM pink_vampire: let me
06:17 AM pink_vampire: let me take apic
06:18 AM pink_vampire: I hate my phone keyboard layout
06:19 AM pink_vampire: https://i.imgur.com/14J5Lax.jpg
06:21 AM Loetmichel: pink_vampire: that looks more like it is made as 2 steel plates milled and then molded the rubber? in between
06:21 AM Loetmichel: shock mount?
06:22 AM pink_vampire|2: no, this is very hard plastic
06:22 AM pink_vampire|2: and the plastic is not milled all the way
06:23 AM XXCoder: interesting. looks metal
06:40 AM Loetmichel: pink_vampire: yes. looks like milled/stamped metal plates that are then injection modled with some sort of plastic
06:40 AM Loetmichel: usually rubber to create a shock mount
06:40 AM Loetmichel: but if you say its hard it may be electric insulation?
06:40 AM pink_vampire|2: it was years ago
06:40 AM pink_vampire|2: so no idea
07:54 AM -!- #linuxcnc mode set to +v by ChanServ
08:15 AM pink_vampire|2: first cut is done
09:20 AM perry_j1987: morning
09:44 AM perry_j1987: who has access to edit this image http://linuxcnc.org/docs/2.7/html/user/user-concepts.html#_when_you_are_lost. am i mistaken or shouldnt the table direction lables be - Y and - X ?
09:45 AM methods_: you are mistaken
09:45 AM perry_j1987: wait yes i see that hah
09:46 AM methods_: the machine is labled correctly
09:46 AM perry_j1987: i havnt finished my coffee this morning yet got turned around
09:47 AM methods_: i won't tell anyone
09:47 AM perry_j1987: too late its logged
09:47 AM methods_: :)
11:23 AM jthornton: yep it's correct and it's my drawing...
11:24 AM roycroft: x and y directions can be whatever you want them to be, as long as you are consistent, however that page shows the directions that most people use, and would be strongly recommended, especially for the novice and easily confused :)
11:25 AM jthornton: but I do see a typo...
11:26 AM roycroft: z limits?
11:32 AM jthornton: Rotary Table Rotaion
01:29 PM ItsFlipp: Okay, I'm out of ideas. Any thoughts on why I'm consistently getting chip welding during helical ramping on 6061?
01:33 PM gloops: sounds like heat to me
01:33 PM ItsFlipp: Yeah, but having trouble nailing down the cause
01:33 PM ItsFlipp: I'm using airblast/durakut mist cooling
01:33 PM ItsFlipp: can hog all day long after ramp is done
01:34 PM gloops: cutting with end of tool as opposed to side?
01:35 PM ItsFlipp: 1/4", ramping at 5 degrees, both 20 and 40 IPM (neither worked), ramp diameter .235"
01:35 PM ItsFlipp: kind of have to use the end when doing a helical ramp...?
01:35 PM gloops: yes, that is one difference between the operations
01:44 PM ItsFlipp: yup. and it's technically a full WoC/slot
01:44 PM ItsFlipp: I've triple-checked that the end mills are all center-cutting
02:15 PM beachbumpete1: 1/4" tool or 1/4" DOC
02:15 PM ItsFlipp: 1/4" tool
02:17 PM beachbumpete1: That seems pretty gentle actually and your diameter is almost tool width so it should work I think...
02:17 PM ItsFlipp: right? I'm kind of at a loss as to what's happening...
02:18 PM ItsFlipp: I mean, the bandaid fix is to drill out an entry hole first, but I gotta imagine it's possible to do...
02:19 PM beachbumpete1: whats your RPM?
02:19 PM ItsFlipp: I mean it's only a Tormach - no Matsuura - but it should be able to do it O.o
02:19 PM ItsFlipp: 10k
02:19 PM ItsFlipp: which is ~630-ish SFM
02:20 PM beachbumpete1: 2 or 3 or 4 flute?
02:20 PM Loetmichel: hihi, remote access is a fine thing... just watched the second Ender3 finish its print from home... left work 4 hours ago ;) ... i only hope the coworker that stayed a bit longer switched the Anet A8 off after IT finished its print... dont want to come back to the company on friday to only find some smoldering ruins ;)
02:21 PM ItsFlipp: 3 flute
02:26 PM methods_: you can't drill a hole so you can skip the ramp?
02:26 PM methods_: oh oops just read up
02:29 PM methods_: might try going with a higher or lower ramp angle until you don't get build up
02:30 PM methods_: i'm usually pretty conservative on my ramp angle 1.5-2 unless the tooling suggests something else
02:45 PM ItsFlipp: methods_: what kinda chip load do you usually use? if I use a 2 degree with those settings, I get some gnarly squealing that makes me think I'm burnishing vs cutting
02:47 PM methods_: when you're ramping like that you'll never load correctly
02:48 PM methods_: your situation may call for a higher ramp
02:48 PM methods_: or increased feedrate
02:49 PM methods_: when i'm proving out a part i'll generally start with a conservative ramp and speed it up once it's proven out and i'm trying to trim time out
03:01 PM ItsFlipp: I'm with ya there; just a small prototyping setup for now, so don't need to minimize time since there's no money coming in :)
03:33 PM Deejay: gn8
04:32 PM JT-Shop: got the kitchen door into the opening... time to quit being a carpenter for the day... fit up and finish tomorrow
06:53 PM _unreal_: questoin. When I finish building my new limit switch wire run adapters. Is any one interested in my old one's? they are a matched pair that take a telephone cable and turn it into the cable for limit switches? 4 wires so one wire as +v or ground. and 3 signal wires. I am building a new 6 wire version.
06:53 PM _unreal_: any one in the USA
06:55 PM bjorkintosh: what are you building?
06:57 PM _unreal_: just new adapters
06:57 PM _unreal_: only gaining more signal lines
06:58 PM _unreal_: my motion control board wants seperated limit switches +/-. it knows if its a positive or neg. limit switch
06:58 PM _unreal_: and the "single" wire limit switch software feature does not work right
06:58 PM _unreal_: so I'm just going to build new adapters
06:58 PM _unreal_: redesign the board a tiny bit
06:59 PM _unreal_: and gap it out so I can mill it
06:59 PM _unreal_: I can post photos if needed but its mroe or less just a pro. designed home FAB phone jack to multi JST connectors
07:00 PM bjorkintosh: yeah but it's for a bigger project isn't it?
07:00 PM _unreal_: designed for parallel designed limit switches
07:00 PM _unreal_: huh?
07:00 PM bjorkintosh: a cnc machine?
07:00 PM bjorkintosh: or just switches?
07:02 PM _unreal_: I'm building a new interface
07:03 PM _unreal_: its a set of boards I designed in kicad, and etched. gives 3 banks of parallel outputs JST connector with 2.52mm spacing outputs and uses the phone cable as the wire.
07:03 PM _unreal_: again a photo would prob help more
07:09 PM bjorkintosh: ah. did you etch it yourself?
07:16 PM _unreal_: yes
07:17 PM _unreal_: I'm uploading 2 photos
07:18 PM _unreal_: ! shit I just relized something
07:19 PM _unreal_: the 6 wire does not help me because I have 6 signals BUT no common +v or -v
07:19 PM _unreal_: damn...
07:19 PM _unreal_: I purchased parts and everything
07:20 PM _unreal_: sigh. I'll hve to just run a sister common wire
07:20 PM _unreal_: https://drive.google.com/open?id=1D4pFacS-CBu3sBmif_J_OaBT7bAMrgq0 https://drive.google.com/open?id=1D4qgmK54-nVOesCu0KRGHkiwC5CsdVsP
07:35 PM _unreal_: any one see fdarling?
07:55 PM perry_j1987: heh this harbor freight #30 drill bit unwound the flutes..... haha
08:22 PM Tom_L: perry_j1987 when you gonna learn?
08:24 PM perry_j1987: I have 118 more drill bits to go through :P
08:24 PM jdh: did you get any cuts out of it?
08:25 PM perry_j1987: actually only reason i got them was just to be able to have the random sizes just in case but mainly for the nice metal case that holds them with good markings etc
08:25 PM perry_j1987: ya got quite a bit and then did something stupid with feeds
08:25 PM Tom_L: sounds like you did get the random sizes you wanted :)
08:26 PM perry_j1987: heh
08:26 PM perry_j1987: oh ya the other day one of the drillbits was real wonky
08:26 PM perry_j1987: started drilling hole and noticed whole flute was not touching sidewall heh
08:26 PM perry_j1987: by mm maybe
08:26 PM perry_j1987: i've been replacing them with bits from Ace as needed
08:27 PM Tom_L: i got a decent set several years ago
08:27 PM Tom_L: not the most expensive but a good set
09:01 PM Valen: I normally get a large cheap set of tools then when I break or wear individuals out I get good ones of those
09:01 PM Valen: means I have everything and if I break it I must be using it ;-)
09:06 PM perry_j1987: aye
09:06 PM perry_j1987: one day though it'd be nice to have enough money to just have the tool vendors come to me heh
09:25 PM jdh: to your sourcing agent
09:35 PM Tom_L: my bud used to have several tool reps come by probably once a month