#linuxcnc Logs

Feb 10 2019

01:48 AM XXCoder: https://www.youtube.com/watch?v=eFpQslTz1wA nice
01:52 AM XXCoder: restoration of 1930s drill machine
01:52 AM XXCoder: very big heavy one
01:52 AM XXCoder: he usually does one video each item but this ones so big hes doing a series./
02:26 AM Deejay: moin
02:27 AM XXCoder: heys
02:27 AM XXCoder: gloops: check out the video
02:28 AM XXCoder: https://www.youtube.com/watch?v=eFpQslTz1wA
02:29 AM gloops: hi, that will be a fine machine when restored i bet
02:31 AM XXCoder: yeah
02:32 AM gloops: i got an old walker turner for less than £50, said i would restore it one day - started using it the day i got it though and never touched anything lol
02:33 AM gloops: for the price theres no way you can buy a comparable new machine
02:36 AM XXCoder: walker turner?
02:37 AM jym: HVAC went out, blew a 50A fuse and when I went to replace it, for a 1/2 second, soemthing in the control box let out the magic smoke.
02:37 AM gloops: old american drill - became milwaukee later
02:38 AM jym: 34F outside, adn snow coming for the next two days
02:38 AM XXCoder: black 3.0 is insane. https://www.youtube.com/watch?v=4PSaGS5i1Yw
02:41 AM XXCoder: tomorrow will be sleet then snow then rain then snow again
02:43 AM CaptHindsight: XXCoder: been the same here
02:43 AM Deejay: morning guys
02:43 AM CaptHindsight: + ice storm
02:43 AM Deejay: just closed my milling pc. hdd was faulty
02:44 AM Deejay: but could copy all data without loss
02:44 AM CaptHindsight: old used drive?
02:44 AM CaptHindsight: or just old
02:44 AM Deejay: 250GB samsung... from 2006
02:44 AM XXCoder: i use 8 gb ssd for my linuxcnc pc lol
02:44 AM Deejay: the drive is in there for 10 years ;)
02:44 AM XXCoder: more than enough room
02:44 AM Deejay: now: 500 GB samsung
02:45 AM Deejay: used space: 2,8 GB
02:45 AM XXCoder: i think 4 gb is minium but i as well as double it for couple bucks more lol
02:45 AM CaptHindsight: I never had drives die until about 5-10 years ago
02:45 AM Deejay: but the drive was flying around, so why buy a new one ;)
02:45 AM CaptHindsight: 250MB - 2GB range were really poor
02:46 AM CaptHindsight: sorry 250GB - 2TB :)
02:46 AM Deejay: but i like linux. hot plug second sata drive, easy partitioning with gparted, copying all data with rsync, chrooting into the new device, installing grub. power off, change cables, booting new device -> works
02:46 AM Deejay: that easy
02:47 AM Deejay: for a second i thought about installing a SSD
02:47 AM CaptHindsight: mostly bad motors, would not spin up properly without warning
02:47 AM Deejay: but thats atom cpu with 2 gigs ram. so, really?
02:47 AM CaptHindsight: got lucky recovering most by running them in a dock without a cable
02:48 AM Deejay: hmm, the motor spinned up
02:48 AM Deejay: but it was not recognized any more
02:48 AM Deejay: only from time to time
02:48 AM Deejay: once it died away during run
02:48 AM CaptHindsight: what brand?
02:48 AM Deejay: all icons were broken and the filesystem gone
02:48 AM Deejay: reboot, worked again, long enough to copy all data
02:48 AM Deejay: samsung
02:49 AM Deejay: spinpoint
02:49 AM Deejay: SP2504C
02:49 AM Deejay: (the replacement is also samsung)
02:49 AM CaptHindsight: had worst time with Samsung and western Digital
02:49 AM Deejay: here is seagate the worst
02:49 AM Deejay: died away few weeks after buying
02:50 AM CaptHindsight: i stopped buying seagate in the 00's
02:50 AM Deejay: got decision!
02:50 AM Deejay: good
02:50 AM CaptHindsight: Toshiba has been fine
02:51 AM CaptHindsight: Intel for SSD
02:51 AM Deejay: for me samsung and WD is actually best
02:52 AM Deejay: my server has WD red drives. working fine. my normal computer has WD blue. working fine
02:52 AM Deejay: and other stuff is samsung
02:52 AM Deejay: working fine for loooong time
02:52 AM Deejay: i think a drive from 2006 is allowed to fail in 2019 ;)
02:55 AM Deejay: might be interesting to see when the SSDs will fail
02:55 AM Deejay: also samsung ssds here
02:56 AM CaptHindsight: finding good PC cases has been more of an issue
02:56 AM CaptHindsight: room for giant GPU cards and HD's
02:56 AM CaptHindsight: oftenn they are in the way of each other
02:57 AM Deejay: hmm, i use tower size cases and my experience is that the cases got better in the last 10 years
02:57 AM XXCoder: cnc router?
02:57 AM XXCoder: Deejay: try 90s ones lol my latest it was easy compared to 90s
02:57 AM Deejay: yep
02:57 AM CaptHindsight: or RAM and HD fight for space
02:58 AM Deejay: easy hdd installing stuff, noise canceling stuff (?)
02:58 AM Deejay: removable mainboard tray and so on
02:58 AM * Deejay uses a big tower
02:58 AM CaptHindsight: lately it's been bad power supplies
02:58 AM Deejay: there is plenty of space
02:58 AM CaptHindsight: 1-2 years and they crap out
02:58 AM Deejay: up to 6 oder 8 hdds
02:59 AM XXCoder: capt I didnt bother buying tower with psu
02:59 AM Deejay: *or
02:59 AM XXCoder: psu always gets the shit end of cheap stick
02:59 AM XXCoder: I bought decent psu seperately from case
02:59 AM Deejay: me too
02:59 AM Deejay: oh wait, its #metoo
03:00 AM XXCoder: that isnt good subject to joke aboit.
03:00 AM Deejay: hmm, i agree. sry
03:02 AM XXCoder: np
03:02 AM CaptHindsight: blasting out the dust every 2-3 months tends to make PC's last much longer
03:03 AM CaptHindsight: and you can never have too many fans
03:03 AM XXCoder: I just do it annually, to outside, each early summer
03:03 AM XXCoder: my room has true hepa filtering so yeah
03:04 AM CaptHindsight: we get leaves in here :)
03:04 AM Deejay: XXCoder, allergical problems?
03:05 AM XXCoder: nah just like clean air.
03:05 AM Deejay: ah
03:05 AM XXCoder: and summers I really need it due to fire smokes
03:05 AM * Deejay has :/
03:05 AM CaptHindsight: pc fans tend to collect hair and lint
03:05 AM XXCoder: it seems to have become annual thing now
03:05 AM CaptHindsight: the dust particles tend to blow right through
03:05 AM CaptHindsight: stick to oils
03:06 AM XXCoder: last summer forest fires was so bad
03:06 AM Wolfmetalfab is now known as Wolf__
03:34 AM gloops: right, tidy the garage up for the 1000th very final time
03:35 AM gloops: this week is mainly going to be about boxes and dovetails
03:36 AM XXCoder: fun
03:36 AM XXCoder: making drawers?
03:37 AM gloops: just small boxes, and boxes with drawers that kind of stuff
03:38 AM XXCoder: cool
03:39 AM gloops: most of the stuff for sale is lightning quick made, mdf and glue stuff, with a bit of thinking the cnc can make traditional joints - quality stuff
03:40 AM gloops: i made one vertical table for the machine - that worked well but i made an improved version and moved its location - hence garage upside down again lol
03:40 AM XXCoder: :)
03:41 AM gloops: just been snatching an hour here and there while working, so nothing gets put away, ive got some time now for a few weeks
03:41 AM Deejay: huh, so mdf is also in english mdf?
03:41 AM gloops: thats what we call it yeah Deejay
03:42 AM Deejay: this wood stuff, right? ;)
03:42 AM Deejay: in german: mittel-dichte faserplatte
03:42 AM gloops: small particle board
03:42 AM Deejay: in english? medium density ...?
03:42 AM Deejay: jup
03:42 AM gloops: medium density fibre board
03:42 AM Deejay: ah!
03:42 AM Deejay: okay
03:43 AM gloops: its ok for some things but i dont like it really
03:43 AM Deejay: hehe, same here
03:43 AM Deejay: its more crap than wood ;)
03:43 AM Deejay: mdf does not like water ;)
03:43 AM gloops: yeah it soaks moisture up like a sponge
03:43 AM Deejay: jup
03:44 AM Deejay: but i have MDF on my mill
03:44 AM gloops: i have an mdf spoilboard, in fact its time to change it i think
03:45 AM gloops: i was looking at some little boxes with drawers in IKEA, from mdf, theyre sheer rubbish
03:45 AM Deejay: yeah, spoilboard is the word i was looking for
03:45 AM gloops: one karate chop would flatten it
03:45 AM gloops: i dont want to make crap like that
03:45 AM Deejay: hihi
03:46 AM * Deejay likes multiplex
03:47 AM Deejay: dont know what it is called in english
03:48 AM Deejay: several layers of plywood glued together
03:48 AM gloops: plywood?
03:48 AM Deejay: not really plywood
03:48 AM Deejay: better ;)
03:48 AM Deejay: stronger
03:48 AM gloops: plywood is a superior material
03:49 AM Deejay: veneer plywood?
03:49 AM gloops: http://www.cypers.be/uploads/pics/Drager_Multiplex_Plaat-diversen_02.jpg
03:49 AM Deejay: yeah, thats it!
03:50 AM gloops: we mainly just call it plywood, there are different grades though, marine ply being more durable, birch ply is often finer
03:51 AM Deejay: ah okay
03:51 AM Deejay: i think birch is the better one
03:51 AM Deejay: sometimes there is poplar plywood
03:51 AM Deejay: thats crap ;)
03:51 AM Deejay: poplar or aspen?
03:53 AM gloops: probably for temporary outdoor work, shuttering for concrete etc
03:53 AM gloops: generally called shuttering ply
03:53 AM gloops: (here)
03:54 AM gloops: Ichs or some associate of his has been back - uploaded some of his old vids ttps://www.youtube.com/channel/UCGuJsIoXW-exBAwdn38dXow/videos
03:54 AM XXCoder: he said hes student in one of classes set by ich or formerly anyway
03:56 AM gloops: shame about the vids - 400, wealth of info there
03:56 AM XXCoder: yeah
03:57 AM gloops: shame about ichs too, he got me up and running
04:08 AM CaptHindsight: kind of wierd
04:08 AM CaptHindsight: take it all down like it was an emergency
04:08 AM CaptHindsight: back up 6 months later
04:09 AM CaptHindsight: scrubbed for secret words or?
04:15 AM gloops: who knows
04:15 AM XXCoder: you think hes... disappeared?
04:15 AM XXCoder: if so i thought germany have moved on way past that kinda crap
04:16 AM gloops: i got a few private messages from said person shortly before he went, asking about the screws and stuff id used with my machine, if i had any issues - he was having trouble with a batch of machines he'd made - had complaints
04:17 AM XXCoder: honestly i doubt its disappear or anything like that
04:19 AM gloops: funny archivist left not long before - also removed a lifetime of vids and photos
04:20 AM XXCoder: he removed videos also?
04:20 AM XXCoder: wow weirfd
04:20 AM XXCoder: its been over a year since he left actually
04:20 AM gloops: there are drawbacks doing tutorials, someone might get hurt and blame you, not saying that has happened
04:20 AM fragalot: even if this were even remotely true or likely.. why on earth would they bother putting things back
04:20 AM gloops: archivists server went down, 2 i think, he left all other channels
04:21 AM XXCoder: i liked him, hes very good and mostly nice
04:21 AM XXCoder: wish I knew why he left
04:21 AM gloops: fragalot maybe just got spooked over something
04:21 AM gloops: threat of legal case maybe, or hacked
04:22 AM XXCoder: if hacked I'd get on using anither nick
04:22 AM gloops: ive known people do that before online, something happens - get all those pics and stuff off the net NOW
04:23 AM gloops: then a few months later realise they panicked for nothing
04:23 AM XXCoder: it it was thing that happened to archivist id be surpised he's quite calm
04:23 AM XXCoder: but who knows
04:23 AM XXCoder: hes way due on reconize and return
04:24 AM XXCoder: *past
04:25 AM gloops: supposed to have started a new business, no idea what
04:26 AM XXCoder: well hope he hits it off, seems so if hes not back. business takes a LOT hours.
04:29 AM gloops: yeah, he never really seemed like someone who was interested in making a lot of money though
04:30 AM XXCoder: i would love to have more money, and something i love more doing but dunno what it would be.
04:31 AM SpeedEvil: My dream job would be designing space hardware for a launch cost of $50/kg or so.
04:32 AM XXCoder: isnt spacex dream getting it to $5 per kg?
04:32 AM SpeedEvil: Their long-term goal is $10/kg (for the passenger class)
04:33 AM CaptHindsight: space escalator
04:33 AM CaptHindsight: it's a fair compromise
04:33 AM SpeedEvil: But NASA basically is institutionally incapable of making anything that costs less than its weight in gold.
04:33 AM SpeedEvil: Which raises questions as to how much of the things they've learned would apply to a massive paradigm shift.
04:34 AM XXCoder: contracts all way down
04:34 AM XXCoder: its like miliary-industry connection, only worse
04:34 AM SpeedEvil: For examle, for $1M or so, you can buy a perfectly servicable ISS module sized vacuum rated insulated vessel.
04:35 AM SpeedEvil: It just weighs 60 tons or so, and is a cryogenic tank.
05:23 AM XXCoder: fancy
05:29 AM sensille: did anybody built his own 3d touch probe?
05:34 AM XXCoder: not me sadly
05:34 AM XXCoder: want to try.
05:35 AM sensille: it looks like such a great tool
05:35 AM XXCoder: new clickspring video
05:35 AM XXCoder: posted 17 minutes ago!
05:39 AM sensille: XXCoder: do you use one at work?
05:40 AM XXCoder: there is some probes at work yeah but never used em
06:46 AM JT-Mobile: morning
06:52 AM Tom_L: morning
06:55 AM XXCoder: morning
06:55 AM XXCoder: JT-Mobile: snow is REALLLY shiny here now lol
06:55 AM XXCoder: forming ice
06:57 AM JT-Mobile: looks pretty
06:58 AM XXCoder: indeed
06:58 AM XXCoder: wanted to get retromini from my car but nah
06:58 AM XXCoder: still too hard
06:59 AM JT-Mobile: how long will it last
06:59 AM XXCoder: monday wll be sleet all day then night snow
06:59 AM XXCoder: tues heavy rain in morning then sunny
06:59 AM XXCoder: night is cold so maybe heavy ice by rain
06:59 AM XXCoder: after that it starts ramping up to normal winter 30s f
07:02 AM XXCoder: i may not be able to go to work on monday
07:02 AM XXCoder: my cars still trapped in snow bank i got it in when i arrived home from work
07:04 AM JT-Mobile: that has to be an odd sight to see your car stuck in a snow bank
07:04 AM XXCoder: thankfully its parked kinda normally lol
07:04 AM XXCoder: but snow there is 8 inches or so i couldnt bck out nor forward out
07:09 AM JT-Mobile: we are getting some freezing rain this morning at the house but should be gone by the time we get back
07:09 AM XXCoder: nice
08:32 AM sensille: are the coordinate systems G55-G59.3 used regularly? i have a hard time to imagine a use case
08:39 AM gloops: i need to look at them, i want to run the same cut over and over, just a simple cut, on many pieces, so i want to hit run, cut one piece, stop - but not return to global home position, just go back to the beginning of the cut
08:40 AM gloops: change the wood, run again, back to start, change wood, run again
08:41 AM gloops: i wont need to touch off after the first one because ill use stops to locate the wood
08:43 AM gloops: i also need to make a jig for angled mortising
08:47 AM gloops: i have a mild headache today though, must be something i ate or drank last night
09:25 AM pcw_home: sensille I think they are commonly use when you have multiple identical workpieces say in vises that all have the same program but different offsets (perhaps set by probing)
09:30 AM sensille: i was now thinking to store the position of the tool length probe in one of them, so i can reference it as X0Y0 from the probing gcode
09:33 AM Tom_L: sensille i always use G54..59
09:34 AM Tom_L: you can set up multiple programs each having a different offset for example
09:35 AM Tom_L: you don't think about it but G54 is used by default
09:38 AM Tom_L: var 5220 determines the default
09:40 AM Tom_L: the work pieces can but don't have to be the same
09:52 AM sensille: so you have multiple workpieces set up, touch each one off in its own coordinate system, and the run programs on them in arbitrary order?
09:53 AM pcw_home: yes
09:54 AM sensille: let one sit there for a few days, because you broke the tool and wait for a replacement, meanwhile work on other pieces, like that?
09:57 AM sensille: only starts to make sense if you have very good home switches, though, or leave the maschine running all the time
09:57 AM SpeedEvil: sensille: I think more just imagine needing five tools to complete the work, it might end up faster to only do five toolchanges, not 5*n
09:58 AM sensille: ah, i see, there are no good provisions for that in gcode otherwise
09:59 AM sensille: thanks, i see the sense in that now :)
09:59 AM SpeedEvil: or just give up, and make first part of the project an auto-tool-changer.
10:02 AM pcw_home: Also if you probe to determine offsets, homing accuracy is dont-care
10:03 AM sensille: sure. i mean if you let a workpiece just sit in place for a few days
10:04 AM pcw_home: Not sure what you mean, If you probe your workpiece, the next step would be to start machining
10:04 AM sensille: in the example above with the broken endmill. nevermind :)
10:26 AM sensille: damn, for electical probing i'd need to mount my vise isolated
10:58 AM SpeedEvil: Clickspring is awesome
12:47 PM jthornton: yea back from Tunica
03:44 PM Deejay: gn8
05:42 PM jthornton: the one morning I'm out of town and the damn chicken door does not open all the way... more error checking to do on the code I guess
05:42 PM XXCoder: you sure its not just strunkage by coldness
05:43 PM jthornton: yea, my buddy flipped the manual open switch and it came up
05:43 PM XXCoder: interesting
05:43 PM Tom_L: figures
05:43 PM jthornton: I thought I had the damn interference sorted tou
05:44 PM jthornton: out
05:44 PM XXCoder: isnt electricity easier to flow in cold envorments in general?
05:44 PM XXCoder: might have caused more emf
05:46 PM jthornton: I think I'm getting some static on the door switches from the motor
05:46 PM Tom_L: put a couple small caps across each motor lead to GND
05:46 PM jthornton: the door for the new coop has never failed to fully open and close but the one in the present coop is a problem
05:46 PM jthornton: did that
05:48 PM jthornton: I'm thinking I need to check to see that the door is actually open every cycle
06:07 PM jthornton: oh well time to relax
07:08 PM skunkworks: did I show this? https://www.youtube.com/watch?v=i76UB1whgjA
07:08 PM skunkworks: I don't remember
07:08 PM skunkworks: at the end of the video you can see the shavings coming out the end of the hole
07:08 PM Tom_L: you showed drilling
07:08 PM Tom_L: afik
07:08 PM Tom_L: i wish i had the HP to rigid tap
07:08 PM Tom_L: but if i did much i could single point ok
07:08 PM Tom_L: takes a bit to get the fit just right
07:09 PM Tom_L: Elmo40 what do you mean?
07:09 PM Elmo40: what prevents X from moving when I am milling in Y ?
07:09 PM Tom_L: they have holding torque
07:10 PM Elmo40: other than number of steps and such, would getting a longer frame motor of same NEMA be a simple swap?
07:10 PM skunkworks: steppers have the most torque when not rotating...
07:10 PM XXCoder: stepper holding tend to be highest torque for stepper
07:12 PM Elmo40: if i currently have a 6-wire stepper and upgrade to a physically longer body 6-wire stepper, would there be any settings that i would need to figure out?
07:13 PM Elmo40: they are both 1.8degree motors
07:14 PM skunkworks: current...
07:14 PM Elmo40: well, going from 64oz to 84oz shouldnt overload the driver.
07:14 PM Elmo40: 1.7a to 2a motor ;-)
07:14 PM skunkworks: heh
07:15 PM Elmo40: they are free and will give me an idea if that is the cause of the drifting problem i'm having
07:18 PM Tom_L: is the drift in one axis or both?
07:19 PM Tom_L: if one, swap drivers or motors or both one at a time
07:21 PM XXCoder: skunkworks: does it use schyrozation with axis or just speed match spindle and motion inwards?
07:21 PM XXCoder: I know sychrozation requires some gearing
07:22 PM Tom_L: sync
07:22 PM skunkworks: spindle synced motion
07:22 PM skunkworks: XXCoder:
07:22 PM Tom_L: using G33.1
07:22 PM XXCoder: maybe im using wrong terms
07:22 PM skunkworks: yes
07:22 PM XXCoder: lock spindle to axis, so spindle rotates by moving Z for example
07:23 PM Tom_L: Z and spindle rotation are locked together
07:23 PM skunkworks: there is an encoder on the spindle - that linuxcnc uses to sync the z axis to the exact rate for the pitch of the tap
07:28 PM Elmo40: for rigid tapping?
07:28 PM skunkworks: spindle encoder (we added..) https://www.youtube.com/watch?v=5vvP4L_hr90
07:28 PM Tom_L: Elmo40 yes
07:28 PM XXCoder: nice
07:28 PM XXCoder: I have added 2 magnets to my spindle for spindle rpm detection but didnt finish it yet
07:29 PM skunkworks: Elmo40: https://www.youtube.com/watch?v=i76UB1whgjA
07:29 PM Tom_L: even the little sherline can do it to an extent: https://www.youtube.com/watch?v=g99lUtjLfMU
07:29 PM skunkworks: XXCoder: on the matsurra we used gear teeth sensors..
07:30 PM XXCoder: nice :)
07:30 PM XXCoder: funny thing first steept it didnt work
07:30 PM XXCoder: turns out sensor has 100 hz limit
07:30 PM XXCoder: I needed 600hz. i have 1 khz sensor
07:30 PM XXCoder: (new sensor)
07:31 PM skunkworks: http://electronicsam.com/images/matsuura/sensors1.jpg
07:31 PM XXCoder: it detects by changing light?
07:31 PM XXCoder: or magnetism (or hall effect)
07:32 PM Elmo40: skunkworks, that Z movement after it stops spinning CCW is kinda odd. Is your initial-Z different than your retraction-Z value?
07:33 PM skunkworks: Elmo40: it is a linuxcnc thing.. the reverse/stop overshoots - then goes back to initial z hight
07:33 PM Elmo40: no ribbing on the inside of that tombstone?
07:37 PM skunkworks: it was factory made - local company. got it at an auction.
07:37 PM skunkworks: for most stuff we do it will be fine
07:50 PM skunkworks: hal effect
08:00 PM Tom_L: skunkworks do you clean up the hall sensor signal with a schmitt trigger or anything?
08:07 PM ziper: CaptHindsight, do you mind some more questions
08:25 PM skunkworks: Tom_L: i thnk it is hooked into a line drivr
08:26 PM skunkworks: used the tech sheet circuit. needed pullups iiirc
08:26 PM Tom_L: likely open collector output then
08:27 PM skunkworks: right..
08:27 PM Tom_L: just curious, never used hall sensors but i know they're commonly used
08:29 PM skunkworks: https://www.digikey.com/products/en?keywords=620-1328-1-nd
08:30 PM Tom_L: i may have some here somewhere
08:30 PM skunkworks: it is a bit more than a hal sensr.. has lots of smarts in it
08:30 PM Tom_L: not sure what kind
08:30 PM Tom_L: yeah
08:30 PM Tom_L: makes it alot easier
08:30 PM Tom_L: get some automotive crank or wheel sensor
08:30 PM Tom_L: weather proof etc..
08:31 PM skunkworks: yes. seems to just work. up to 6krpm with 48 teeth iirc
08:31 PM skunkworks: 68?
08:31 PM skunkworks: dont remember
08:32 PM Tom_L: separate index mark?
08:32 PM CaptHindsight: ziper: whats up?
08:32 PM ziper: CaptHindsight, how thick of a part can you infuse? is it a function of any other geometery, or just resin viscosity?
08:33 PM CaptHindsight: viscosity and what you use to push or pull it through
08:33 PM CaptHindsight: e.g. vacuum
08:34 PM CaptHindsight: and pore size
08:34 PM CaptHindsight: loose vs tightly woven
08:34 PM skunkworks: Tom_L: yes... using 3 sensors
08:35 PM ziper: CaptHindsight, what are the benefits of curing at an elevated temperature vs a post-cure?
08:36 PM CaptHindsight: you want it warm enough to cure
08:36 PM ziper: of course
08:36 PM CaptHindsight: below a certain temp polymerization will be very slow
08:36 PM ziper: is there no benefit above that?
08:37 PM CaptHindsight: only if the formulation calls for elevated temps
08:37 PM CaptHindsight: post cure doesn't really apply to 2K epoxy
08:38 PM CaptHindsight: 2k epoxy should just be cured at above the recommended temp
08:38 PM CaptHindsight: warmer temps will accelerate polymerization
08:39 PM CaptHindsight: the % of polymerization will be effected more by how well you mix and the proper proportions of the 2 parts
08:41 PM ziper: what epoxy does benefit from a post cure?
08:41 PM CaptHindsight: I have crosslinkers that won't do much of anything until they hit ~50C
08:41 PM CaptHindsight: then they trigger
08:41 PM CaptHindsight: photopolymers may be post cured
08:42 PM CaptHindsight: you might just pin them to get them solid, then blast them later for full cure
08:45 PM CaptHindsight: for example one might cure at 17hrs @ 70C, 13 min @ 100C and 4 min @ 150C
08:46 PM ziper: so besides mixing properly and getting ideal resin/fiber ratio, is there anything else I can do to make the best part possible?
08:46 PM CaptHindsight: define best part
08:46 PM CaptHindsight: you match the epoxy to the application
08:47 PM CaptHindsight: then you follow the recommended mix and cure time and temps
08:49 PM ziper: which properties? elongation just needs to be higher than the fiber, but modulus and HDT should be as high as possible right?
08:49 PM CaptHindsight: if that is what you want or trying to achieve
08:51 PM CaptHindsight: you modify all those properties to fit the application
08:51 PM CaptHindsight: anyway will be back later
08:57 PM XXCoder: dang
08:57 PM XXCoder: snow is back and very heavy snowing here now
08:57 PM XXCoder: looks like added a inch already
09:00 PM skunkworks: XXCoder: WI?
09:00 PM Tom_L: Wa
09:00 PM XXCoder: tacoma, wa
09:00 PM XXCoder: where snow usually dont go
09:01 PM XXCoder: where snow rarely visit but never stays
09:01 PM skunkworks: sounds like we are getting 10+ inches over the next day or so
09:01 PM XXCoder: really?
09:02 PM XXCoder: supposed to have stopped by yesrrday
09:04 PM Tom_L: feel free to keep it
09:05 PM XXCoder: lol
09:05 PM skunkworks: wouldnt be so bad if i actually got out skiing
09:06 PM Tom_L: i forgot where you were
09:06 PM skunkworks: western WI
09:07 PM Tom_L: ahh up where you're _supposed_ to get lots of snow..
09:07 PM jdh: I was in madison last week. frozen lakes...weird.
09:08 PM skunkworks: where are you normally?
09:08 PM jdh: Wilmington, NC
09:08 PM jdh: it was 75-80f here last week.
09:09 PM skunkworks: heh.. my neice lives in charlett
09:09 PM skunkworks: (sp)
09:10 PM skunkworks: jdh: what ya doing in madison?
09:11 PM jdh: vendor there is building us a machine
09:11 PM skunkworks: nice
09:12 PM skunkworks: was it below zero?
09:12 PM jdh: no, they thanked us for bringing good weather. it was above freezing for a few hours
09:13 PM jdh: -8 right after we left
09:13 PM jdh: where are you?
09:13 PM skunkworks: trempealeau
09:14 PM skunkworks: north of lacrosee
09:14 PM jdh: never heard of that one!
09:15 PM skunkworks: west of madison... :)
09:16 PM jdh: East minnesota?
09:17 PM skunkworks: just.. i see minnisota from my window...
09:24 PM skunkworks: http://electronicsam.com/images/house/view1.JPG
09:54 PM norias: looking california, feeling minnesotta
10:35 PM Tom_L: https://sct-usa.com/thread-mill-code-generator/
10:35 PM Tom_L: interesting
10:35 PM XXCoder: yeah
10:35 PM XXCoder: isnt there lower bound limit?
10:36 PM Tom_L: "C" ?
10:37 PM XXCoder: yeah
10:37 PM XXCoder: theres pictyure showing what it is
10:37 PM XXCoder: https://sct-usa.com/wp-content/plugins/sct-thread-mill-code-generator/tmu/images/UNthread-internal.gif
10:38 PM XXCoder: c must be shorter than hole depth
10:38 PM Tom_L: it switches to external as well
10:38 PM Tom_L: right
10:38 PM Tom_L: unless it's thru
10:38 PM XXCoder: yeah though you want it to stop somewhere :)
10:38 PM Tom_L: you want it to be more than the distance from the tool tip to the point
10:39 PM Tom_L: clearance
10:39 PM XXCoder: external is interesting
10:39 PM XXCoder: custom bolts I guess
10:39 PM XXCoder: left hand bolts ;)
10:40 PM Tom_L: one tool would do all 4
10:41 PM XXCoder: that generator is pretty cool, saved link
10:41 PM Tom_L: so did i
10:41 PM Tom_L: i was sitting here contemplating writing a macro to do that on my cad cam
10:41 PM XXCoder: thread milling is great alternate when machine cant tap worth crap
10:42 PM Tom_L: like my sherline..
10:42 PM Tom_L: still learning about it
10:43 PM Tom_L: it's slower but if your spindle can't do it it's an alternative
10:44 PM XXCoder: yeah
10:44 PM XXCoder: wood nut and bolt :)
10:44 PM XXCoder: why not
10:45 PM Tom_L: https://www.youtube.com/watch?v=92D6QqRzGAM&t=50s
10:46 PM Tom_L: one of my first attempts
10:46 PM Tom_L: i ran it slow on purpose
10:46 PM Tom_L: later found out i should start from the bottom and go up
10:46 PM Tom_L: err i guess i fixed the code there
10:47 PM Tom_L: can't really tell..
10:47 PM Tom_L: need to make multiple passes
10:48 PM XXCoder: interesting
10:54 PM Elmo40: thread milling is great. you can make custom everything. pitch and diameter. great for special products.
11:00 PM XXCoder: and making sure only you get parts order? lol
11:00 PM Elmo40: ;-)
11:01 PM Elmo40: so many avenues for money to leave me, I need to find ways for it to join me.
11:03 PM Elmo40: when you connect an encoder or some other form of feedback while using a stepper, what does the software do when numbers dont completely align? fail out and stop? Or try to get to the value before the next line?
11:03 PM XXCoder: im sure thats settable?
11:03 PM Elmo40: i'm sure it is... Being Linux and all ;-)
11:03 PM XXCoder: some can adjust to match, and some fail out if excessive (like tool broke and its jamming against part)
11:04 PM XXCoder: joint following error
11:05 PM Elmo40: i just dont recall seeing that option
11:05 PM XXCoder: never set something like that either, never had encoders lol
11:06 PM Elmo40: i'm looking into it. trying to be prepared (old boy scout here.)
11:06 PM XXCoder: used to be scout myself