#linuxcnc Logs

Dec 07 2018

#linuxcnc Calendar

02:06 AM Deejay: moin
04:48 AM jthornton: morning
04:49 AM XXCoder: hey
04:49 AM XXCoder: wii u arrived today, come with 3 games as specified... and another game in wii u itself lol
04:53 AM jthornton: what is a wii?
04:53 AM XXCoder: wii u is a game console
04:53 AM XXCoder: by ninendo
04:53 AM jthornton: ah
04:53 AM jthornton: last game I played was Doom lol
05:02 AM Tom_L: the wii is the one that makes you look stupid while playing it
05:03 AM XXCoder: wii was one of better consoles though they went brilliant and sold so many of em
05:03 AM Tom_L: i wonder how many screens have been broken by the controller from ppl throwing it
05:04 AM XXCoder: not that many but yeah probably hundred?
05:05 AM weenerdog: good mernin
05:08 AM Tom_L: 25F Hi 36
05:09 AM jthornton: a tad warmer over here
08:35 AM weenerdog: i be learn more smarter solidworks dain bramage lol
08:36 AM gregcnc: SW causes me to try to rotate screen shots of CAD on websites or in videos
08:36 AM weenerdog: lol
08:37 AM gregcnc: been driving CAD since '98 though
08:39 AM weenerdog: i been doing autocad since 11 for dos. its like the overweight girl that puts out easily. sw is more like the beautiful complex european girl who keeps you in the friendzone forever.
08:40 AM weenerdog: "you will never learn my secrets. only sven really knows me"
08:40 AM gregcnc: I took R12 maybe at the local college
08:41 AM gregcnc: a bit on Microstation which I preferred, then SW 98+ at a job
09:00 AM huibuuh: hey
09:00 AM weenerdog: howdy
09:00 AM huibuuh: I have an issue with rehome, it seems to not work at all. someone knows what my issue could be?
09:01 AM huibuuh: I have to close the entire program and then the first time it works
09:45 AM rmu: huibuuh: what is rehome
09:48 AM huibuuh: press home when I pressed it once already
09:49 AM gregcnc: what is the problem?
09:50 AM huibuuh: when i press "Home Axis" it wont go to zero
09:50 AM huibuuh: it will go to something like -1.2894
09:50 AM gregcnc: you have a work offset active
09:51 AM gregcnc: looka t the gcode list and read about G28
09:51 AM huibuuh: what is that?
09:51 AM gregcnc: did you touch off a work offset?
09:51 AM huibuuh: there is no G28 in my gcode
09:52 AM gregcnc: what are you trying to achieve with "home axis"
09:52 AM rmu: huibuuh: does the machine make the usual homing moves when you press home or is it just sitting there
09:53 AM gregcnc: I suspect he thinks home axis sends it to X 0.0, but that's not it's purpose
09:53 AM huibuuh: I want to set the machine to the start point with "home axis"
09:53 AM gregcnc: define start point
09:54 AM huibuuh: the 0,0,0 from the CAD
09:54 AM rmu: so is it moving or is it not
09:54 AM gregcnc: issue G0 X0. Y0. Z0.
09:55 AM huibuuh: yes it will go there
09:55 AM gregcnc: home axis is not for that
09:55 AM huibuuh: but I need to redefine it because I have to flip the part over to get the top done after the bottom
09:55 AM gregcnc: http://linuxcnc.org/docs/2.7/html/gcode/coordinates.html
09:55 AM huibuuh: and the wood has different thickness so I have to measure and adjust the Z after I flatten the surface
09:56 AM rmu: what has home to do with that
09:56 AM gregcnc: you need to set another work offset, not rehome the machine
09:57 AM gregcnc: homing calibrates the mechanics of the machine to the control software, so the control knows the machine's position
09:57 AM huibuuh: hmmm
09:58 AM gregcnc: after that everything is done by work offsets (coordinates systems)
09:58 AM huibuuh: so the work offsets are the diff between the machine home and the part home?
09:58 AM huibuuh: part 0,0,0
09:58 AM gregcnc: the only time you need to re home is if you power down the machine, crash, or stall steppers
09:59 AM gregcnc: correct
09:59 AM huibuuh: do I enter the work offsets in the MDI tab?
10:00 AM gregcnc: you can, otherwise touch off
10:01 AM huibuuh: okey, thank you very much
10:01 AM huibuuh: imma read that link you gave me and have another try
10:01 AM gregcnc: also http://linuxcnc.org/docs/2.7/html/gcode/g-code.html
10:02 AM huibuuh: yeah, rtfm :D
10:02 AM gregcnc: yeah sometimes it helps
10:03 AM huibuuh: aight, imma go and redo my model (fucked that one up too :D) and then read the manual.
10:03 AM huibuuh: thank you
10:03 AM huibuuh: cya
10:05 AM rmu: rtfm is more efficient than guessing around, trial and error can be expensive with ruined stock and bits
10:11 AM sensille: hm, i'm trying to find a good homing speed. based on possible overshoot and acceleration i can calculate a value, but even on much lower values the gantry audibly hits the side
10:17 AM gregcnc: without numbers, it's not possible to say if the distance is adequate
10:18 AM sensille: 0.5mm, 400mm/s^2, 400mm/s
10:18 AM gregcnc: unless you expect to need every last micron of travel just move the switches away from the end stops
10:19 AM sensille: currently they're glued on, but still i'd like to understand why it doesn't work
10:19 AM sensille: maybe there are some latencies in the switch detection
10:20 AM sensille: or the switch itself behaves differently at higher speeds
10:20 AM sensille: or my calculation is off
10:21 AM sensille: oh
10:22 AM sensille: i _meant_ to say 400mm/min
10:22 AM sensille: but that value is actually mm/s
10:22 AM sensille: that explains it
10:22 AM gregcnc: numbers don't lie
10:22 AM jdh: liers number.
10:24 AM sensille: even for velocity the speed is configured in mm/s. i don't know why i thought it would be mm/min for homing
10:25 AM sensille: perfect :)
10:25 AM sensille: so 20mm/s now for homing
10:26 AM gregcnc: great
10:27 AM sensille: i'm a big fan of calculating instead of testing, so i was a bit disturbed ;)
12:16 PM jdh: I'm a big fan of hitting start and hoping.
12:50 PM sensille: Loetmichel: re runout: with the sorotec collet it's much much better. 0.02mm now
01:06 PM weenerdog: nice
02:54 PM Sabotend_ is now known as Sabotender
03:31 PM Deejay: gn8
05:27 PM weenerdog: howdy
05:31 PM jthornton: hey
05:33 PM Roguish: jthornton: hey, what's up?
05:34 PM jthornton: not much winding down the day and trying to quess the proper syntax for pyqt aboutToQuit.connect() lol
05:35 PM skunkworks: jthornton: sounds like you're having fun :)
05:36 PM jthornton: yea programming a touch screen for the chicken coop lol
05:36 PM Roguish: has anyone machined Nitronic 60?
05:37 PM skunkworks: heh - that seems like overkill... But when you have a hammer...
05:37 PM jthornton: well it's more fun to have a 7" touch screen than a tiny little oled screen and if you can have the manual override buttons it's a plus
05:38 PM jthornton: never heard of that material
05:38 PM Roguish: fancy stainless.
05:38 PM Roguish: how about 4340?
05:39 PM jthornton: never messed with any of that either
05:39 PM Roguish: I just turned down some work to modify a couple of small parts. too risky.
05:40 PM Roguish: adding a couple of 1.5mm dowel holes, and some 2.3mm dowel holes.
05:41 PM Roguish: they only had 1 set of parts. no room for mess ups.
05:41 PM jthornton: bad plan lol to mess up the only parts
05:42 PM Roguish: my thoughts. parts bound for Disney Imagineering
05:42 PM Roguish: cool project....
05:45 PM Roguish: not as cool as chicken coops though.\
05:45 PM jthornton: lol
05:45 PM jthornton: well time to put on my sous chef hat and get the fish prepped for dinner
06:20 PM diginet_ is now known as diginet
10:06 PM Tom_itx is now known as Tom_L