#garfield Logs
Jul 01 2020
#garfield Calendar
05:59 AM Tom_L: no
06:04 AM Tom_L: https://www.lakeshorecarbide.com/cornerroundingcutters.aspx
09:45 AM rue_mohr: oooh
09:59 AM aandrew: actually you guys are a bunch of resourceful people... where would I get a cheap source of N2? I was thinking welding gas but that's argon with liek 4-16% CO2 depending on the mix
10:00 AM aandrew: O2 is easy, it's available in 1lb containers for handheld propane torches
10:00 AM aandrew: CO2 might be possible with the tiny cartridges used for BB guns
10:00 AM aandrew: really anything NOT oxygen is fine. I was even thinking to just use MAPP or propane but that's dangerous but fine in a pinch
10:01 AM rue_mohr: you can get just N2 welding gas
10:01 AM aandrew: apparently N2 is used a lot in cooking for whip stuff but the cartridges apparently aren't threaded like CO2 is
10:01 AM rue_mohr: they do it
10:01 AM rue_mohr: right hand thread
10:02 AM rue_mohr: oh, not the small bottles
10:02 AM rue_mohr: you can get lots of things in welding bottles
10:02 AM aandrew: right, but I don't need wads of it and don't want to pay a lot
10:02 AM rue_mohr: you can also get co2 for beverage stuffs
10:02 AM aandrew: little O2 bottles for welding is like $13
10:02 AM aandrew: yeah, like sodastream type things
10:04 AM rue_mohr: well, realyl small amounts you can pull off bottles of sparkling water ;)
10:04 AM rue_mohr: $1.50
10:04 AM rue_mohr: not sure how much you get
10:05 AM rue_mohr: "Were out of co2!" "shake the bottle!!!"
10:08 AM aandrew: hahaha
10:08 AM polprog: isnt N2 used for these pressurized whipped cream thingies?
10:08 AM polprog: small green canisters junkies use to vent and get high
10:08 AM polprog: it was something with nitrogen iirc
10:08 AM rue_mohr: }:/ I dont know...
10:09 AM aandrew: I have a bunch of CO2 cartridges to clean out the mosquito magnet burner, was gonna get a $20 CO2 cartridge bike pump; it takes those cartridges and has a regular old presto/shrader valve adapter, and I can easily bring that ot regular 1/8" tubing
10:09 AM aandrew: polprog: it is, but apparently they're not threaded
10:09 AM polprog: thats N2O, my bad
10:09 AM aandrew: btw, this is so cool: https://www.youtube.com/watch?v=MdfUSNzc0Xk
10:10 AM polprog: haha, that is awesome
10:11 AM polprog: i was tu build a floating barge robot
10:11 AM aandrew: the way they used the magnets and low-friction tape to build a coupling is awesome
10:13 AM rue_mohr: wow cute
10:20 AM rue_mohr: hahah youtube wants user experience feedback
10:20 AM rue_mohr: sounds like their worried about people not liking them anymore
10:21 AM aandrew: youtube keeps tightening things and people are starting to jump ship
10:24 AM polprog: its been getting worse recently
10:24 AM aandrew: yep
10:25 AM polprog: the whole kids content is a trainwreck, the COPPA must have put some serious regulation on data collection, so anything that is marked as for children has all the functionality stripped down, cant save a video to a playlsit or Watch Later even
10:25 AM polprog: also aandrew im reading on https://en.wikipedia.org/wiki/Powerlet and they dont seem to be threaded either
10:26 AM aandrew: this UHMW plastic is intriguing
10:34 AM rue_mohr: ok, I can be awake
10:34 AM rue_mohr: overcast day
10:34 AM rue_mohr: want to do the shed trim
11:03 AM aandrew: hahaa https://youtu.be/6f52EUaRM1o
11:14 AM rue_shop1: huh, lots like what I was gonna do
12:01 PM rue_mohr: hmm I could tighten up this bearing holder block a lot
12:02 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1160506.jpg
12:02 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1160509.jpg
12:18 PM Tom_L: what's that for?
12:39 PM rue_mohr: bearing holder for the plasma cnc
12:40 PM Tom_L: off today?
12:44 PM rue_mohr: yes
12:44 PM rue_mohr: its a holiday
12:44 PM Tom_L: oh
12:45 PM Tom_L: oh wait... that's not a print. you cnc'd the holes
12:46 PM Tom_L: for a sec i was gonna say damn that's a good print
01:48 PM aandrew: polprog: "cat isn't done eating, please stand by" ?
01:49 PM aandrew: rue_mohr: nice block; why milled instead of printed? just tolerance or the block of plastic will be stronger or?
02:44 PM polprog: lol, what cat?
02:44 PM polprog: also, tuned up the video monitor a little
02:45 PM polprog: i cant seem to get rid of overscan though
03:04 PM rue_shop1: printed is kinda brittle
05:56 PM polprog: rue, you have to pump up your key matrix game: https://twitter.com/polprogpl/status/1278446609257435138
05:56 PM polprog: courtesy of victor company of japan ltd
06:15 PM rue_mohr: yea 3 bits
06:16 PM Tom_L: rue_mohr, what do you use for the cad for your mill?
06:17 PM Tom_L: you've probably told me before..
06:34 PM rue_mohr: librecad
06:36 PM Tom_L: you draw the dxf in something else or that?
06:42 PM rue_shop2: thats what I draw the dxf in
06:42 PM rue_shop2: I'm another 10 years I'll have probably written my own
06:43 PM * Tom_L marks this date
06:43 PM rue_shop2: librecads bug list takes a hefty jump every time they have to upgrade to the next QT version
06:44 PM Tom_L: yeah i see that
06:47 PM Tom_L: i'd sure like to tweak a post to work with grbl
06:47 PM Tom_L: so you don't have issues with my gcode files
06:47 PM rue_shop2: it does
06:47 PM rue_shop2: it just doesn't work with the handshaking on my spooler
06:48 PM Tom_L: you said it burps om something
06:48 PM rue_shop2: which I wrote
06:48 PM Tom_L: oh
06:48 PM Tom_L: any way to fix that in the gcode?
06:48 PM rue_shop2: *something* generates 2 "ok" in one line
06:48 PM rue_shop2: my program assumes 1 ok per line sent
06:48 PM Tom_L: maybe a G and M code on the same line?
06:48 PM rue_shop2: when it hears an OK, it sends another line
06:49 PM rue_shop2: so the extra ok causes it to overflow the grbl buffer
06:49 PM Tom_L: i do that because it's legal but i can put them on separate lines
06:49 PM rue_shop2: not usre
06:49 PM Tom_L: how hard is it to test a file?
06:49 PM rue_shop2: :) I'm sitting here trying my best to not fall asleep
06:49 PM rue_shop2: using the machine to run off a bunch more of those bearing blocks
06:50 PM Tom_L: are those roller skate bearings?
06:51 PM rue_shop2: 10 mins each, 24 blanks left
06:51 PM rue_shop2: "608"
06:51 PM rue_shop2: yep
06:52 PM rue_shop2: i happen to have a narrow peice of scrap material I can use to make them
06:52 PM rue_shop2: so I'm using up a peice
06:52 PM Tom_L: https://www.youtube.com/watch?v=gtnDg_UzcPE&feature=youtu.be
06:55 PM Tom_L: how fast will your spindle turn?
06:56 PM rue_shop2: 12k3
06:56 PM Tom_L: 4k rpm?
06:56 PM rue_shop2: 12300
06:56 PM rue_shop2: on my custom machine
06:56 PM Tom_L: when i edited the tool for that undersize part it jumped the rpm up
06:56 PM rue_shop2: the sherline probably only goes up to 4k
06:56 PM Tom_L: yeah i can run mine there
06:57 PM Tom_L: iirc 5500 was about tops
06:57 PM rue_shop2: oh yea
06:57 PM rue_shop2: the lock
06:57 PM rue_shop2: I dispise lock systems that run the strike thru the outside interface
06:58 PM rue_shop2: but its helped out a lot of times on the enter systems I need to fix in the appartments
06:58 PM rue_shop2: I was building a keypad/card reader that would keep everyting on the inside of the building
06:58 PM rue_shop2: cause those are only pro stuff for $$$$$
06:59 PM rue_shop2: dont get why
06:59 PM rue_shop2: super easy
06:59 PM Tom_L: cause it says 'pro'
06:59 PM rue_shop2: heh no
06:59 PM rue_shop2: I mean like commercial stuff
07:00 PM Tom_L: i really don't see anything in the gcode that would cause a command issue
07:00 PM rue_shop2: $1800 controllers
07:00 PM rue_shop2: yea I'm not sure yet
07:00 PM rue_shop2: I'm jigged up for this at the moment
07:00 PM Tom_L: search for the G53 lines and move the M5 to a line below it and try that
07:00 PM rue_shop2: and the other machine is doing more sprayer head blanks
07:00 PM Tom_L: G53 G00 Z0 M5
07:01 PM rue_shop2: but the programs I use have 4 G commands in one line
07:01 PM Tom_L: G53 G00 Z0 M05
07:01 PM Tom_L: i could remove line numbers
07:01 PM Tom_L: that's about all i can think of off hand
07:01 PM rue_shop2: https://paste.debian.net/1154694/
07:02 PM rue_shop2: thats the block I'm doing now
07:02 PM Tom_L: nothing has more than one command per line
07:02 PM Tom_L: maybe 3-4 axis
07:03 PM Tom_L: X Y Z I J K
07:03 PM Tom_L: circles require 4 i believe
07:03 PM Tom_L: the xy for the end point and IJ for the arc center
07:03 PM rue_shop2: I wonder if its the continue character from the pause...
07:04 PM * rue_shop2 feeds the machine another blank
07:04 PM rue_shop2: I'd like to take a nap but I'm not the right kinda tired
07:04 PM Tom_L: should have array'd them and slapped the sheet down
07:04 PM rue_shop2: shaking this drowsyness would be awesome
07:05 PM rue_shop2: the material I had was a long thin strip
07:05 PM rue_shop2: its inefficient, but its using up awkward stock
07:05 PM Tom_L: brb, dogs want out
07:06 PM rue_shop2: I wonder if the bit would overheat if I doubled the feed rate and rpm
07:13 PM Tom_L: keep the chip load the same and it will be fine
07:13 PM Tom_L: just clear the chips
07:13 PM Tom_L: and cool it with air or such
07:20 PM Tom_L: notepad ++ does it have a 'column' select mode?
07:20 PM rue_shop2: yes and no
07:20 PM rue_shop2: the more work the bit is doing, the more it heats up
07:21 PM rue_shop2: and that affects plastic badly
07:21 PM Tom_L: yes
07:21 PM Tom_L: colored plastic more
07:21 PM Tom_L: black is worst
07:21 PM rue_shop2: ?
07:21 PM rue_shop2: ok
07:23 PM aandrew: polprog: your twitter image with the test pattern with the half eaten can of cat food in the middle of it
07:27 PM Tom_L: rue_shop2, http://tom-itx.no-ip.biz:81/~webpage/rue/coupler/coupler1a_no_lines.txt
07:28 PM Tom_L: same as coupler1a (the undercut one by .006")
08:16 PM rue_mohr: ok, wont be able to test for a bit
08:21 PM Tom_L: np, but we can start to eliminate things maybe
08:24 PM rue_mohr: yep
08:24 PM rue_mohr: see whats causing the double ok
08:32 PM Tom_L: you're cutting those in 2 passes?
08:32 PM rue_shop1: the bearing blocks?
08:32 PM Tom_L: yeah
08:32 PM rue_shop1: its 4 operations
08:32 PM Tom_L: oh?
08:32 PM rue_shop1: two holes, and 3 profiles
08:32 PM rue_shop1: same bit
08:32 PM rue_shop1: 10 mins
08:33 PM Tom_L: code looks a bit long for that part
08:33 PM rue_shop1: :)
08:34 PM Tom_L: what size cutter?
08:34 PM rue_shop1: the cam program breaks it up oddly
08:34 PM rue_shop1: 3mm
08:34 PM Tom_L: so i'll try it with .125
08:34 PM Tom_L: can you give me inch dimensions?
08:34 PM rue_shop2: I think the bit is 2.98 or so...
08:34 PM rue_shop2: somewhere there is a switch
08:35 PM rue_shop2: did you want to make one up
08:35 PM rue_shop2: the material is 9.5mm
08:35 PM Tom_L: i'd like to compare the code
08:35 PM rue_shop2: hdpe
08:35 PM Tom_L: that's all
08:35 PM rue_shop2: hmm
08:35 PM Tom_L: since i'm not doing anything right now
08:35 PM rue_shop2: I had a time tuning it up to metric
08:35 PM Tom_L: should take about 5 min to draw
08:36 PM Tom_L: are those 22mm?
08:36 PM Tom_L: bearings
08:37 PM Tom_L: what are the bolt hole centers?
08:37 PM Tom_L: and hole diameter
08:39 PM rue_shop2: I cant see where to change it
08:39 PM rue_shop2: yes 22ID
08:39 PM Tom_L: just gimme the numbers, it's not that complicated
08:39 PM rue_shop2: the bolt holes are 4mm cause I'm trying to use up metiic hardware
08:39 PM rue_shop2: 1 sec
08:39 PM Tom_L: distance between centers?
08:40 PM rue_shop2: bolt holes are 48mm
08:40 PM rue_shop2: c-c
08:40 PM rue_shop2: the bearing pocket is 22m dia, 6.9mm deep
08:40 PM Tom_L: ok, outter end radius? around the bolts
08:41 PM rue_shop2: the matericl is 9.5mm deep, I overcut to 10
08:41 PM Tom_L: i don't care about the depth, the code will be the same
08:41 PM rue_shop2: the left and right radii are 7mm c on the bolt hole
08:41 PM Tom_L: this is an imaginary code experiment
08:41 PM rue_shop2: the body radius is 32mm
08:41 PM Tom_L: on the OD of the part?
08:41 PM Tom_L: ok
08:42 PM rue_shop2: sorry body dia
08:42 PM Tom_L: radius on the ends and dia on the body?
08:42 PM rue_shop2: heh 1 sec
08:46 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1160513.jpg
08:46 PM rue_mohr: heh missed to arrowheads
08:47 PM rue_mohr: you got it tho there eh?
08:47 PM rue_mohr: I could send you the dxf :)
08:47 PM Tom_L: you forgot the OD of the center
08:47 PM Tom_L: oh 16mm
08:47 PM Tom_L: radius on all?
08:47 PM rue_mohr: no, its a tangent-tangent
08:49 PM Tom_L: well i've got a part anyway
08:49 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/Untitled.png
09:03 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/coupler/bearing_block.txt
09:04 PM Tom_L: 62 lines
09:05 PM Tom_L: 2 passes on the OD, the holes, the inner hole and a single pass on the ID step
09:05 PM Tom_L: nothing fancy...
09:06 PM Tom_L: i did one of those bearings as a fit test the other day
09:10 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Cube/Hole_test2.jpg
09:11 PM aandrew: I got some downright tiny bearings in from china the other day
09:11 PM aandrew: 3x8x3mm
09:14 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/coupler/bearing_block1.jpg
09:14 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/coupler/bearing_block2.jpg
09:14 PM Tom_L: purple is the cutter path
09:15 PM Tom_L: aandrew, i used to do slot cars. those are rather tiny too
09:22 PM Tom_L: rue_mohr, it looks like your cam posts the arcs in quadrants
09:47 PM rue_mohr: it might
09:48 PM rue_mohr: Tom_L, how was the fit on the bearing?
09:48 PM rue_mohr: snug? loose?
09:50 PM rue_mohr: Tom_L, 2mm was an experimentally heavy cut
09:50 PM rue_mohr: can you view my NC in 3d paths?
09:51 PM rue_mohr: MoonyMoon, I cant find my box of 12V inverters :/
09:52 PM rue_mohr: I think I ahve one in the truck tho
09:52 PM rue_mohr: I have a bunch of ups' but I'd need to trick one into *just* running
09:53 PM rue_mohr: they have interlocks that would be annoying to try to bypass
10:08 PM Tom_L: no way to view the gcode here
10:08 PM Tom_L: i could push the bearing in
10:08 PM Tom_L: and it wouldn't fall out
10:09 PM Tom_L: realistically if i were gonna cut that part i'd do another depth pass to lessen the load a bit
10:22 PM rue_mohr: well, the lamps I got for the shed dont support that horrid square sine approximation from cheap inverters
10:23 PM Tom_L: my bud had a bridgeport boss5 that required the arcs to be programmed in quadrants
10:23 PM Tom_L: you don't see it much anymore
10:24 PM rue_mohr: I supect its a safer-than-sorry thing
10:24 PM Tom_L: they do a figure 8 otherwise
10:25 PM rue_mohr: heh
10:25 PM Tom_L: not the desired effect
10:25 PM rue_mohr: I wonder how the internals of that error work
10:25 PM Tom_L: your downloader?
10:26 PM rue_mohr: no, the figure 8
10:26 PM Tom_L: just the way the control processed it
10:26 PM rue_mohr: yea, thats an eloborate error
10:27 PM Tom_L: i used to have the manual for it but i finally got rid of it
10:29 PM rue_mohr: wonder if I should build or buy an inverter
10:30 PM rue_mohr: I need a solar charge controller for it too
10:30 PM rue_mohr: arg
10:30 PM Tom_L: talk to jymmmm in #linuxcnc, he's been looking at that stuff for a while
10:31 PM rue_mohr: its more about do I buy and wait or build
10:31 PM Tom_L: found a mains switch on ali the other day cheap
10:31 PM rue_mohr: I acn build now
10:31 PM rue_mohr: if I buy it, I pay money and wait up to 7 months
10:31 PM Tom_L: frees you up to finish something though
10:32 PM Tom_L: i didn't really have a project for those cutters but i wanted to have a couple on hand
10:33 PM rue_mohr: looks handy, what radii?
10:33 PM Tom_L: 1/16, 3/32, 1/8
10:34 PM Tom_L: .063, .093, .125
10:34 PM rue_mohr: k
10:34 PM rue_mohr: how many tool holders do youhave?
10:36 PM rue_mohr: their all modified sine wave
10:36 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Cube/Tool_Holder1.jpg
10:36 PM Tom_L: those aluminum ones were ones i did as a test
10:37 PM rue_mohr: ah right
10:37 PM rue_mohr: I remember that now
10:37 PM Tom_L: i did some from steel too
10:37 PM Tom_L: never could get them centered like i wanted
10:38 PM Tom_L: the smaller block of holders is the one i set the tools up on for a part and label them by tool number
10:42 PM rue_mohr: they dont make small true-sine inverters
10:42 PM rue_mohr: 1kwa nd up
10:42 PM rue_mohr: I need 68w
10:42 PM Tom_L: you can't make one from a motor can you?
10:42 PM rue_mohr: oooooh
10:42 PM rue_mohr: hmm
10:42 PM Tom_L: they use those for phase inverters
10:43 PM rue_mohr: hmmmmmm
10:43 PM rue_mohr: you have an interesting point
10:43 PM Tom_L: i don't know enough about that to say
10:43 PM rue_mohr: the question is, could I live with myself if I did it
10:44 PM rue_mohr: I'v been told if you spin up an alternator hard enough, it can output 120
10:44 PM Tom_L: doesn't that have to do with the windings?
10:45 PM rue_mohr: but a universal might do it too
10:46 PM rue_mohr: to do solid state, I'd need +-84V
10:46 PM rue_mohr: from 12V, pulling about 8A
10:47 PM rue_mohr: and pulling about 0.6A from the 84V lines
10:47 PM rue_mohr: hmmm 600mA
10:47 PM rue_mohr: 1:7
10:48 PM rue_mohr: flyback maybe?
10:51 PM Tom_L: i'll let you work that all out :)
10:52 PM rue_mohr: it almost seems eash
10:52 PM rue_mohr: easy
10:52 PM rue_mohr: a crap computer core is 150w
11:55 PM rue_mohr: I need more cnc machines
11:55 PM rue_mohr: I should finish converting the old one to grbl
11:55 PM rue_mohr: I think I have to replace 1 more motor
11:56 PM rue_mohr: but there is a snag
11:56 PM rue_mohr: there is a program I'v not used in like 18 years that only it can do
11:56 PM rue_mohr: it takes images and translates them to height maps for profile work
11:57 PM rue_mohr: dunno if I have the source