#linuxcnc Logs

Jan 31 2021

#linuxcnc Calendar

01:29 PM Tom_L: finally
01:36 PM Vcoder: Hmm...
01:36 PM Tom_L: been kinda wonky last couple days
01:36 PM fogl81: is it possible to search through the logs based on keywords, this would be very useful
01:36 PM Tom_L: no
01:36 PM Tom_L: if you open them in your browser you can search the page
02:16 PM norias: huh
02:23 PM * JT-Shop2 ponders what finish to use on the workbench... polyurethane might be too slick
02:23 PM Tom_L: don't want an oil rub?
02:23 PM Tom_L: linseed or such
02:24 PM Tom_L: might attract too much dust...
02:24 PM JT-Shop2: dunno what to use
02:25 PM Tom_L: tung oil
02:25 PM Tom_L: it's food safe and FDA approved :)
02:26 PM JT-Shop2: I have cutting board oil
02:27 PM JT-Shop2: it's mineral oil
02:28 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Steel2.jpg
02:28 PM Tom_L: mine got various finished applied as i used it :)
02:29 PM JT-Shop2: lol
02:32 PM Tom_L: we sprayed some polyester finish and some of that is still stuck to the floor
02:43 PM roycroft: i use tried & true varnish oil on almost everything
02:45 PM roycroft: this is a woodworking bench, is it not?
03:02 PM JT-Shop: yes, a hybrid woodworking bench and the back wall will be a place to hang clamps, straight edges, levels and other long stuff but not my pipe clamps
03:05 PM JT-Shop2: roycroft: what is varnish oil?
03:08 PM roycroft: it's a mix of oil and natural resins
03:08 PM roycroft: google tried & true varnish oil
03:09 PM roycroft: and i would also comment that you should not sand the benchtop or any vise jaws beyond p80
03:09 PM roycroft: a lot of folks make their workbenches all slick and shiny
03:09 PM roycroft: that just makes it hard to work on them
03:09 PM roycroft: you can't set anything down without it sliding around
03:09 PM roycroft: p80 sanding and a non-film building finish are what you want
03:10 PM roycroft: no polyurethane
03:10 PM roycroft: no wax
03:10 PM roycroft: you want the surface to remain a little grippy
03:10 PM JT-Shop2: yep, don't want it slick
03:10 PM roycroft: i use shellac on a lot of stuff
03:11 PM roycroft: but never on a workbench would i use it
03:11 PM roycroft: tried & true takes a long time to dry
03:11 PM roycroft: that i the only drawback
03:11 PM roycroft: is
03:11 PM JT-Shop2: found it
03:11 PM roycroft: it's non-toxic, smells nice, and leaves a beautiful finish
03:11 PM JT-Shop2: cool
03:12 PM roycroft: you have to wipe it off until it's completely dry or it will never dry
03:12 PM roycroft: and i like to warm it up before applying it - i put some in a jar and put the jar in my hot glue pot
03:12 PM roycroft: so it warms up to 60 degrees
03:12 PM roycroft: it soaks in really nicely when i do that
03:22 PM JT-Shop2: 140f that's pretty warm
03:23 PM JT-Shop2: thanks for the info
04:46 PM -!- #linuxcnc mode set to +v by ChanServ
04:51 PM roycroft: you probably don't need to warm it that much, but that's what the glue pot is set at
04:51 PM roycroft: and it's hard to adjust, and only adjustable within a few degrees
04:54 PM JT-Shop: https://gnipsel.com/images/wood-working/workbench-mk1/
04:54 PM JT-Shop: got started on the back
04:56 PM Tom_L: you got absolutely too much workspace for one person :)
04:56 PM Tom_L: just a bit jealous
04:56 PM JT-Shop: the base of the workbench was a section of Bosch convayer at Briggs PB West plant
04:57 PM Tom_L: heh
04:57 PM Tom_L: you probably built that too at some point
04:57 PM JT-Shop: I used to make automatic assembly machines for them so I had to have it
04:57 PM Tom_L: yeah i knew you did stuff for them
04:57 PM JT-Shop: I used the section of convayer to mock up the automatic machine
04:58 PM JT-Shop: put a pallet with the engine at that point of assembly so everything worked at install
05:00 PM Tom_L: my kid got moved up to running zimmermans... ~25' aluminum blocks to rough out to next to nothing
05:00 PM JT-Shop: cool
05:00 PM JT-Shop: btw it's a lot of work to heat all this space with wood...
05:00 PM Tom_L: he was pretty excited since he worked with some pita ppl in the other area
05:01 PM Tom_L: large gantrys
05:02 PM Tom_L: i'm sure all the insul you put in helps a bunch
05:12 PM unterhaus_: I have been thinking about the person on here yesterday that had mesa firmware on their fpga development board
05:12 PM unterhaus_: I'm a bit curious how he ruled out slow network on the dev board side
05:12 PM unterhaus_: I trust pcw
05:13 PM Tom_L: pretty sure he's been doing FPGAs for a very long time
05:13 PM JT-Shop: yeah lots of insulation helps a lot
05:14 PM Tom_L: still smell smoky after the almost fiasco?
05:14 PM unterhaus_: Tom_L did his numbers look right? I haven't set up mine to test
05:15 PM Tom_L: unterhaus_, i wasn't following that
05:16 PM unterhaus_: I think with my system, the only thing 4khz sampling might do is excite a high order harmonic
05:16 PM JT-Shop: yeah still a bit like the inside of my smoker lol
07:06 PM TekniQue_ is now known as TekniQue
07:07 PM roycroft: i think i need an automatic drain for my compressor tank
07:08 PM roycroft: when the humidity is close to 100% for prolonged periods of time i get a lot of water in the tank
07:09 PM pcw_home: A 4 KHz servo thread with Mesa Ethernet cards is pretty picky about the host PC
07:09 PM skunkworks: I think my first 3 splices were successful... http://electronicsam.com/images/greenmachine/IMG_20210131_120834.jpg
07:10 PM pcw_home: an automatic drain might save an explosion later on...
07:10 PM skunkworks: pcw_home: I rarely run over 1 :) - I do have a 2khz machine - but it is pci..
07:11 PM pcw_home: not normally needed except for torque loops etc
07:14 PM skunkworks: This is voltage loop I guess...
07:14 PM skunkworks: I would have to look
07:16 PM skunkworks: (the drives take pwm directly and just pass it through.
07:19 PM pcw_home: Yeah voltage mode is closer to velocity mode than torque mode
08:31 PM -!- #linuxcnc mode set to +v by ChanServ
08:42 PM -!- #linuxcnc mode set to +v by ChanServ
09:22 PM norias: wee
09:22 PM norias: i had a little fun tonight
09:22 PM norias: got linuxcnc running in sim mode in a vm
09:22 PM norias: then sent the UI to a web browser
10:14 PM unterhaus: the 4khz loop was on a linear motor gantry.
10:20 PM pcw_home: I only have a couple PCs that can do a 4 KHz loop
10:21 PM Tom_L: brand?
10:29 PM skunkworks: pcw_home: how fast have you run on pci/pcie?
10:29 PM pcw_home: I think about 8 KHz
10:34 PM pcw_home: I have done 4 KHz on Ethernet on a HP 8300 a Asus H97 with a G3258 CPU
10:34 PM skunkworks: 8300's are amazing
10:34 PM skunkworks: (8200 are a close second)
10:36 PM pcw_home: I have on step newer than a 8300 here (a EliteDesk-800) and its much worse Ethernet latency wise
10:38 PM pcw_home: one step newer