#linuxcnc Logs

Sep 25 2020

#linuxcnc Calendar

12:04 AM XXCoder: :(
12:10 AM XXCoder: hope you figure it
12:39 AM veegee: https://www.snipercountry.com/rifle-caliber-guide/ where do I even begin...
12:40 AM veegee: hillbilly white trash gun loving republican, full of freedumb units (lol "yard"), killing for sport, can't even get the dimensions right. I have to troll this fatass somehow
12:41 AM veegee: sorry wrong channel
12:41 AM XXCoder: i saw "snapiercountry" and didnt click it, as its olviously death loving gun owner
12:44 AM Deejay: moin
12:50 AM CaptHindsight: 500 steps per rev with 5mm pitch ball screw positioner, after several travels from end to end it's better than 0.0005"
12:50 AM CaptHindsight: ~6um
12:51 AM veegee: Thank you for the µm unit
12:51 AM veegee: I was about to scold you for the freedumb units
12:52 AM CaptHindsight: https://www.amazon.com/Stepper-Integrate-Position-Encoder-Control/dp/B01MFA87KI
12:52 AM veegee: CaptHindsight aliexpress is full of those
12:52 AM CaptHindsight: closed loop stepper with 1000 line internal encoder
12:52 AM veegee: Amazon sellers usually get them from aliexpress
12:53 AM CaptHindsight: delivered in <12 hours
12:53 AM veegee: ah right good point
12:53 AM CaptHindsight: was worried the specs were wrong or it would arrive damaged
12:53 AM CaptHindsight: but the motor shaft dia was right
12:53 AM veegee: if it's prime, easy return
12:53 AM CaptHindsight: business account
12:54 AM veegee: Do they make returns harder with a business account?
12:54 AM CaptHindsight: i got a bunch of $1800 projectors from Amamazon so they love me
12:55 AM veegee: Ah yeah I spent probably > $50,000 on amazon in the past few years and return half the things I get
12:55 AM CaptHindsight: they even give me discounts after they arrive if something is missing
12:55 AM veegee: Yeah same
12:55 AM CaptHindsight: I was too nice when I started
12:56 AM CaptHindsight: missing remote ah $50, but they offer me $300
12:56 AM CaptHindsight: so now when i get a support person in India I ask for 90% back to get started and bargain my way
12:57 AM CaptHindsight: veegee: dunno whats wrong with yer foerks
12:58 AM veegee: The fork positioner specifically
12:58 AM veegee: and yes, the chat support is the best
12:58 AM CaptHindsight: since yah kins feels it git springaye
12:58 AM CaptHindsight: sorry, speakin uhmerican
12:59 AM veegee: I'll have to remove the forks and work my way in that way
12:59 AM veegee: right after I get a new hose crimped
12:59 AM veegee: It also has these weird quick conenctors that are exactly like Pioneer connectors but the size is in between 1/4" and 3/8" models
01:06 AM CaptHindsight: asked for creme fraiche at the store the other day, I said in uhmerican it's "Creme Fresh"
01:06 AM CaptHindsight: Cream even
01:06 AM veegee: Those mechanical "farm jacks" are quite nice
01:06 AM veegee: Heavy, but nice
04:42 AM JT-Cave: morning
04:54 AM XXCoder: hey
04:59 AM gloops: a thought on something
04:59 AM gloops: if i cast some letters from resin, and cast a plaque for them to go on to make a sign
04:59 AM gloops: working through the process, you hit a bit of an issue
05:00 AM gloops: how do you know where to stick the letters accurately - for alignment, without doing a load of manual measurement and so on
05:01 AM gloops: possible solution - USB projector, type out the letters in a text app, project the image onto the plaque, stick the letters in place perfectly
05:01 AM gloops: yy..no?
05:16 AM rs[m]: gloops: why not cut the outlines of the cast letters into plywood or something like that
05:16 AM rs[m]: as a template
05:17 AM Tom_itx: morning
05:23 AM XXCoder: hey
05:31 AM gloops: rs[m], yeah i thought of that, cut out thin mdf templates for the letters to sit in, time consuming though
05:36 AM gloops: the cutting out is quick enough, but then you got the design process, generate code, basically setting up every time, change tool etc, its all minutes
05:37 AM Tom_itx: but what else you got to do but chat on here?
05:38 AM Tom_itx is now known as Tom_L
05:42 AM gloops: not a lot atm as back still healing lol
05:42 AM gloops: apart from dreaming up jobs for when its right
05:42 AM gloops: those little set up process sound like nothing - but get very tedious when youre repeating them through the day
05:42 AM Tom_L: mold a pin on the back of the letters and a corresponding hole on the plaque (small hole)
05:42 AM gloops: different letters on different plaque every time though
05:42 AM gloops: that projecting idea would work if you could focus right on the plaque at the right size
05:42 AM Tom_L: that's why custom work costs more :)
05:42 AM gloops: and could see it clearly enough
05:42 AM gloops: it does cost more, but if you can do it cheaper theres an opening
08:34 AM Loetmichel: *wheeeze*... just carried 600lb OSB to the company... in my BMW convertible... good thing it hasnt rained... the boards stood up higher than my head on the back seat ;)
09:51 AM jymmmm: morning
09:51 AM Tom_L: yup it is
09:55 AM Tom_L: whassup today Mr jymmmm ?
09:56 AM jymmmm: Tom_L: not much, just learned how to add menu bar graphs like 30 seconds ago
09:58 AM roycroft: it is friday!
09:58 AM jymmmm: Tom_L: right click menu bar, select system monitor, then click on ADD
10:00 AM Tom_L: for what program, os etc?
10:00 AM jymmmm: Tom_L: Ubuntu
10:00 AM Tom_L: oh
10:00 AM Tom_L: took me a sec or so to figure that out on the rpi
10:01 AM jymmmm: Tom_L: on the left side... https://i.imgur.com/Qpgoa08.png
10:03 AM norias: Tom_L, damn you, btw
10:03 AM Tom_L: haha
10:04 AM norias: aren't you the one that suggested i look in to programming fpga's?
10:04 AM Tom_L: that board i linked, i found one for $19 afterward
10:04 AM Tom_L: whoooo meee?
10:04 AM norias: what a fucking rabbit hole
10:04 AM Tom_L: that's a good board to get if you can find one
10:04 AM Tom_L: uber cheap and good examples
10:04 AM norias: well, so now i'm like...
10:05 AM norias: oh are dsp's programmable?
10:05 AM norias: yes.
10:05 AM Tom_L: well of course
10:05 AM jymmmm: Looks like my flashlight arrived yesterday, woohoo!!!
10:05 AM norias: so, it turns out...
10:06 AM Tom_L: jymmmm, bright?
10:06 AM norias: the Arm Cortext M4 has a dsp
10:06 AM norias: oh, can I get those to play with?
10:06 AM Tom_L: what's the battery life on it?
10:06 AM norias: yup
10:06 AM norias: $14
10:06 AM norias: so, basically, i just have a list of stuff to buy and learn to program
10:06 AM norias: thanks to you
10:06 AM Tom_L: glad to help :)
10:07 AM Tom_L: have you played with bitfiles on the mesa cards yet?
10:07 AM norias: no, i don't have access to one anymore
10:07 AM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/emc/xilinx/xilinx14_install_index.php
10:08 AM jymmmm: Tom_L: I've had it for over 5 years, just ordered a backup if ever lost. Great balance between beam and flood, good battery life as I did NOT go for the brightness one, single 18650, ad I like that I can hold it between my teeth... https://www.fasttech.com/p/1826602
10:08 AM Tom_L: i think i got that headlamp you posted a long time back
10:09 AM jymmmm: Tom_L: the Fenix one?
10:09 AM Tom_L: single AA, not so wild about the battery life on it
10:09 AM Tom_L: iirc yes
10:09 AM Tom_L: other than that it's great
10:09 AM jymmmm: Tom_L: On high, it doens't last long
10:10 AM jymmmm: low/med it's pretty good
10:10 AM Tom_L: i generally go for medium
10:10 AM Tom_L: sometimes i wish i had a brighter one
10:11 AM jymmmm: Tom_L: at the time, it was the only waterprrof and single cell headlamp, not even blackdiamond was waterproof
10:11 AM jymmmm: Tom_L: There is brighter, but more heavy
10:12 AM Tom_L: i probably just need stronger glasses
10:13 AM jymmmm: Tom_L: you would be pleased with the one I just linked to. I carry it on my keychain every day
10:13 AM Tom_L: single led?
10:14 AM jymmmm: Yeah
10:15 AM jymmmm: When I bought it years ago, I didn't think I would like it, but now love it. Been great during blackouts, working on stuff, etc
10:15 AM jymmmm: catching critters a long ways off, etc.
10:18 AM jymmmm: Tom_L: you could drive with it
10:19 AM jymmmm: Tom_L: and you can lockout the annoying sos/strobe modes =)
10:20 AM Tom_L: how many mode groups does it have?
10:21 AM Tom_L: strobes and brightness?
10:22 AM jymmmm: 2 groups: group one is loe/med/high, group two is lo/med/hi/sos/strobe
10:22 AM jymmmm: 860lumen
10:24 AM Tom_L: k
10:24 AM jymmmm: Tom_L: FWIW, I've had this for over 5 years, and I just bought it again just in case if I ever lose it. I use and like it that much.
10:25 AM jymmmm: I depend upon it that much.
10:28 AM jymmmm: Tom_L: Well, I suppose you could use this on the side of your head instead of on your forehead... https://www.fasttech.com/products/1630/10003473/1258004-headlight-mounting-strap-for-18650-flashlight
10:29 AM jymmmm: Eh, maybe not, can't aim up and down
10:30 AM roycroft: jymmmm: does that flashlight work with rechargeable batteries?
10:31 AM roycroft: i have a couple small flashlights that are similar, but only 600 lumens
10:31 AM roycroft: i should say "only" :)
10:32 AM roycroft: they work fine with rechargeables, but i've had some cheap led flashlights that will not work with them
10:33 AM jymmmm: roycroft: 18650 rechargable
10:34 AM jymmmm: roycroft: Takes ONE 18650 lithium battery
10:37 AM jymmmm: It's brighter than my friend's 6cell maglight, brighter than my 3 cell LED maglight
10:38 AM jymmmm: I can see the mailbox 300ft away
10:40 AM roycroft: oh, i'd rather not use those batteries
10:40 AM roycroft: i use aa/aaa eneloops exclusively
10:40 AM roycroft: but that would account for its high lumen output
10:40 AM jymmmm: I wouldn't use anything but lithium batteries now.
10:40 AM roycroft: eneloops are nice because they hold 85% of their charge in storage for a year
10:41 AM jymmmm: I didn't want to use lithium for the longest time due to availability, but I just keep spares on hand fully charged
10:42 AM jymmmm: I write the date on my cells, these are over 5 years old now, and still working great.
10:42 AM roycroft: i write the date on mine as well, and i have some going back to 2010/2011 that still work fine
10:43 AM roycroft: but i don't cycle through them really fast - i have about 25 aa cells on standby at any given time
10:43 AM roycroft: not as many aaa, but i don't use aaa for much
10:43 AM roycroft: mostly remote controls
10:46 AM jymmmm: I only have one remote, so dollar store for 8 cells works for me
10:48 AM roycroft: i have several remotes, and not just for electronics gear
10:48 AM roycroft: the dust filter in my shop has one, as do the primary dust collector and one of my shop vacs
10:48 AM jymmmm: lol, it's sad... I like that $14 flashlight way batter than the $60 one I have
10:50 AM roycroft: i guess i could get an 18650 recharger
10:50 AM roycroft: a lot of high lumen flashlights use those batteries, and i've avoided getting them for that reason
10:50 AM Tom_L: would be trick if the light came with one built in and you just plugged it in
10:51 AM roycroft: in fact, i should see if my chargers can handle them
10:51 AM roycroft: i've never checked
10:52 AM roycroft: https://www.lacrossetechnology.com/products/bc9009https://www.lacrossetechnology.com/products/bc9009
10:52 AM roycroft: those are the chargers i use - i have two of them
10:52 AM roycroft: and they don't do 18650
10:53 AM jymmmm: 404
10:53 AM roycroft: oh, sorry
10:53 AM Tom_L: jymmmm, 2 links stuffed together
10:53 AM roycroft: that was a double paste
10:53 AM roycroft: i got over zealous with my clicking
10:53 AM roycroft: https://www.lacrossetechnology.com/products/bc9009
10:53 AM roycroft: try that :)
10:54 AM jymmmm: got it, yeah that charger isn't design for Lipo/LiFe
10:55 AM roycroft: https://www.amazon.com/Battery-Keenstone-Universal-Rechargeable-Batteries/dp/B07JD77LVD/ref=sr_1_5?dchild=1&keywords=18650%2Bbattery%2Bcharger&qid=1601049010&sr=8-5&th=1
10:55 AM roycroft: that one looks potentially useful
10:56 AM jymmmm: https://www.amazon.com/dp/B07428G1G2/
10:56 AM jymmmm: it will also tell you the capacity of your cells
10:56 AM jymmmm: and internal resistance
10:57 AM roycroft: aah, that's the type i was looking for
10:57 AM roycroft: with the capacity/discharge capability
10:57 AM roycroft: like my la crosse ones have
10:57 AM Tom_L: haven't seen pcw here in a bit
10:57 AM Tom_L: wonder how he's doing
10:58 AM roycroft: i'll put it on a list
10:58 AM roycroft: how long do the 18650s hold their charge in storage?
10:58 AM roycroft: are they similar to standard lithium ion cells?
10:58 AM jymmmm: I havne't been around very much, so haven't notice who is/insssss't around, Tom_L how long as he been awol?
10:58 AM Tom_L: i'm not sure
10:59 AM jymmmm: roycroft: 85% after one year on averge
10:59 AM roycroft: oh, so similar to eneloops
10:59 AM roycroft: cool
10:59 AM roycroft: then i don't mind getting them
10:59 AM jymmmm: roycroft: Li-Ion and Li-Poly are pretty much the same. It's LiFe that are different
11:00 AM roycroft: that charger you linked to does have an interesting feature
11:00 AM roycroft: it can be used as a usb power bank
11:01 AM roycroft: and since it has a car adapter, getting a couple and keeping one in my car would be a good idea
11:01 AM jymmmm: roycroft: But you are talking 3-5 year life for LiPo, versus 10 years for LiFe
11:01 AM jymmmm: and after 10 years, it's still at 80% of it's original capacity.
11:01 AM roycroft: yeah, i guess i should check the cost of the batteries as well since consumables are the most important part of the equation
11:02 AM jymmmm: You DO pay a premium for LiFe, but after 10 years it comes our cheaper than LiPo
11:02 AM roycroft: and they are more expensive than the lithium ion cells
11:03 AM jymmmm: It's a long term investment, after 10 years, they are cheaper
11:03 AM roycroft: sure
11:03 AM roycroft: keep in mind that i have eneloops that are 10+ years old and still work fine
11:03 AM roycroft: i'm comparing to what i have
11:03 AM jymmmm: sure
11:04 AM roycroft: not comparing the two lithium technologies to each other
11:04 AM roycroft: and if lipo have a short life term i'm not even interested in them
11:04 AM jymmmm: Oh yeah I forgot... blackout starting Saturday thru monday... again
11:05 AM roycroft: fun
11:06 AM jymmmm: I got it down to 8 minutes to get up on generator sadly
11:07 AM Tom_L: question is though, what battery tech will they have in 10 yrs?
11:07 AM jymmmm: Tom_L: LiFe (Edison batteries) have been around since the 1800's
11:09 AM roycroft: that's a really good question, tom_l
11:10 AM roycroft: there's been a lot of research in battery technology, especially in the past couple decades, but the "big breakthrough" has not happened and does not seem to be on the horizon
11:10 AM jymmmm: Edison patented in 1901, but was develeped in other countries before then... https://en.wikipedia.org/wiki/Nickel%E2%80%93iron_battery
11:10 AM roycroft: it's the single biggest reason that electric cars have not become widely desired/acceptable
11:11 AM roycroft: there have been batteries since the 18th century
11:11 AM jymmmm: LiFe batteries
11:11 AM jymmmm: I'm only talking about LiFe "Iron" batteries
11:11 AM roycroft: it appears that amazon is not a place to go for li-fes2 18650 cells
11:12 AM jymmmm: I wouldn't really do LiFe in a flashlight
11:12 AM jymmmm: theres a chance a bettery flashlight would come out before 10 years I'd suspect
11:12 AM roycroft: why not?
11:12 AM jymmmm: theres a chance a bettery flashlight would come out before 10 years I'd suspect
11:14 AM jymmmm: The flashlight I just ordered is 5 years old, but I REALLY like it. But they have an even better LED die now, that's SO much better than what I have.
11:14 AM roycroft: i'm not one to upgrade for the sake of upgrading
11:14 AM jymmmm: Like it can be seen over a mile away
11:15 AM roycroft: if i buy a flashlight today that i like i would not replace it in 10 years just because there's something newer/shinier
11:15 AM roycroft: if it still works and i'm still happy with it i'd keep it
11:15 AM jymmmm: and that's why I kept mine, and bought a backup one
11:15 AM roycroft: and, 18650 batteries have been around for a long time
11:16 AM roycroft: even if there's a better flashlight in 10 years, it might still use the same batteries
11:16 AM jymmmm: I wouldn't trust ANY battery after 10 years
11:17 AM Loetmichel: hehe, just got sent for a grocery run by my wife. came home with half a dozen roses on top... they were at the exit of the grocery store, couldnt pass. Now wife is suspicious that i have something to apologize for ?!?
11:17 AM jymmmm: Loetmichel: HAHA, SUCKER!!!
11:17 AM roycroft: the problem, though, from what i am seeing right now, is that it's difficult to ascertain exactly what one is getting with an 18650 battery - the ones i'm finding online mostly don't stipulate the technology they use
11:17 AM roycroft: they say li-ion
11:17 AM roycroft: but not what iion
11:17 AM jymmmm: Loetmichel: Ok, take the roses back and put on your desk
11:17 AM roycroft: ion
11:18 AM roycroft: loetmichel: if she's convinced that you did something wrong and cannot be dissuaded, it sounds like you should go do something wrong now, since you've already been convicted
11:19 AM roycroft: if you've done the time, you might as well do the crime
11:28 AM Loetmichel: roycroft: i think it was in jest.
11:28 AM * roycroft was also joking
11:28 AM Loetmichel: we lvoe each other, and like to banter sometimes
11:29 AM roycroft: i don't really know you, and know nothing about your wife, but what little i do know of you makes me doubt that she would be serious about something like that
11:31 AM Loetmichel: she wouldnt
11:31 AM roycroft: i think i'll put any possible purchase of 18650-based devices aside fro now
11:31 AM roycroft: for
11:31 AM Loetmichel: roycroft: why?
11:31 AM roycroft: i'm really not happy that the chemistry is so obfuscated on the websites that sell them
11:31 AM FinboySlick: roycroft: Remember they're German though. Parking the car 5cm to the left of the usual spot might be considered gross misconduct.
11:31 AM Loetmichel: are there new batteries on the market?
11:32 AM roycroft: and most of them don't even stipulate if they are protected or not
11:32 AM Loetmichel: ah
11:32 AM Loetmichel: so assume they arent
11:32 AM roycroft: yes
11:32 AM roycroft: and i don't want to buy any that aren't
11:32 AM roycroft: if i can't get good technical data on them i don't want them
11:33 AM Loetmichel: see, i wouldnt buy any protected ones. waste of capacity (space) and i like to do my own protective circuits so i know they dont fail when it counts
11:33 AM roycroft: i probably can get those data, but it's not like other technologies where all the interesting specifications are easily found
11:33 AM roycroft: yeah, but i'm talking about putting them in flashlights
11:33 AM roycroft: i don't want to design anything
11:33 AM roycroft: or build anything
11:33 AM roycroft: i want to buy a flashlight and stuff batteries in it
11:34 AM roycroft: so for my use, protected batteries is the right thing
11:34 AM roycroft: i'd really prefer lithium metal batteries to lithium ion anyway, because they're so much safer
11:34 AM FinboySlick: removable batteries. That's so 2010. If the battery is dead, you throw away the entire device, as is prescribed by the modern world.
11:34 AM roycroft: but for some reason they're not being deployed
11:35 AM roycroft: i avoid disposable products whenever possible
11:35 AM jymmmm: roycroft: no toilet paper for you
11:35 AM roycroft: which is why i have so much stuff - i've been accumulating stuff for decades, and i get stuff that doesn't have to be replaced whenever possible
11:36 AM roycroft: i said 'whenever possible'
11:36 AM roycroft: toilet rolls are inherently disposable
11:36 AM FinboySlick: Well... it's *possible* to use your hand.
11:36 AM roycroft: but the ones i buy are made of recycled paper
11:36 AM roycroft: and are unbleached
11:36 AM FinboySlick: But I'm just helping jymmmm troll at this point.
11:37 AM roycroft: so their environmental footprint is low compared to the standard fare
11:37 AM roycroft: sure
11:37 AM roycroft: and your kind of trolling is fine
11:37 AM jymmmm: dried out corn cobs for you, just rinse off (optional) and reuse
11:37 AM roycroft: i can deal with it :)
11:37 AM roycroft: I AM CORNHOLIO
11:38 AM FinboySlick: Thank you for that reference :)
11:38 AM roycroft: i hear those guys are back, btw
11:38 AM Loetmichel: roycroft: you mean the kind of toilet papper that invoked signs at the german military with "DONT use the toilet paper for grinding paint off vehicles!"
11:38 AM roycroft: my recycled paper toilet rolls are still 100x softer than anything i used while in europe
11:39 AM roycroft: and i can tell you from experience, it's not just the german stuff that's like sandpaper
11:39 AM FinboySlick: roycroft: Everything Mike Judge is pretty awesome. You seen Silicon Valley?
11:39 AM roycroft: no, i haven't
11:39 AM FinboySlick: I adored it. Highly recommended.
11:39 AM beachbumpete1: Just FYI do not ever buy a supermax wire brush sander....jeez man what a piece of shit this things been.
11:39 AM roycroft: so i've put that charger on a wish list
11:39 AM skunkworks: wow - I have a working access97 install in windows 10...
11:40 AM roycroft: that will remind me to investigate further at some point
11:40 AM roycroft: i really would like to get a higher lumen output flashlight, but have avoided doing so because of the battery issue
11:41 AM roycroft: and now that i'm getting older and my eyes are getting cloudier, a brighter flashlight is even more useful/desirable than before
11:43 AM jymmmm: roycroft: This is the charger and batteries I bought years ago and still use... https://www.frys.com/product/7222093
11:43 AM roycroft: and now i'm reading that li-ion does not refer to the lithium iron batteries at all
11:44 AM jymmmm: LiPo and LiIon and the basically the same, LiFe are different, yes.
11:44 AM roycroft: it refers to lithium cobalt oxide or lithium manganese oxide
11:44 AM jymmmm: LiFe, LMO are different
11:44 AM roycroft: lipo are actually LiFePO4
11:44 AM jymmmm: No
11:44 AM roycroft: what youc all life are LiFeS2
11:44 AM roycroft: from what i'm reading
11:44 AM jymmmm: Lipo are NOT LiFePO4
11:45 AM jymmmm: Lipo/LiIon are NOT LiFePO4
11:45 AM jymmmm: LiFePO4 are Iron/Edison/Tesla batteries
11:46 AM roycroft: well i can't find any reference to a lithium battery with phosphorous other than LiFePO4
11:47 AM roycroft: oh, Po does not stand for Phosphorous Oxide in that context
11:47 AM roycroft: it's lithium polymer
11:47 AM roycroft: ok
11:47 AM roycroft: that's something completely different to everything i've been reading about
11:48 AM roycroft: so now things are even more complicated
12:18 PM Tom_L: poor roycroft
12:27 PM roycroft: ?
12:39 PM Tom_L: <roycroft> so now things are even more complicated
12:39 PM roycroft: oh
12:39 PM roycroft: that's not a big deal
12:40 PM roycroft: it just means that until i'm actually interested in using the technology i probably won't make the time to do much more research
12:40 PM roycroft: we might have viable metal-air batteries by that time anyway :)
12:41 PM roycroft: if there are any significant breakthroughs in battery technology over the next decade, i think that perfecting one of the metal-air batteries would be it
12:46 PM Tom_L: solar arrays with supercaps
02:46 PM Tom_L: pcw_home, on an encoder input, if i'm not using the index channel can i use that for GPIO?
02:47 PM Tom_L: on an MPG
02:51 PM pcw_home: Yes
02:51 PM Tom_L: i don't need to remove it from the bit file?
02:51 PM pcw_home: (as long as you do-not set index-enable the index input is unused)
02:52 PM Tom_L: ok
02:52 PM pcw_home: no, you can use the GPIO input but you can also use the input-index (which also works for muxed encoders)
02:52 PM Deejay: gn8
02:55 PM CaptHindsight: the closed loop stepper I'm testing is quieter than the AC servos
02:57 PM CaptHindsight: wish the docs were clear, they say 50uS internal clock for the loop cycle
02:57 PM CaptHindsight: but supports up to 200kHz stepping
03:00 PM CaptHindsight: ran it with 5000 steps per rev on a 5mm pitch ballscrew and it stayed <6um for repeatability
03:00 PM CaptHindsight: 20kHz stepping
05:51 PM robotustra: evening
05:52 PM robotustra: how is everything?
05:52 PM Tom_L: super
05:53 PM robotustra: nice, I got sine plate now derusting it.
05:54 PM robotustra: what are you usually use to preserve from rusting your tools? I mean is there any special protection except usual industrial oil?
05:55 PM Tom_L: not that i'm aware of
05:55 PM Tom_L: just oils etc
06:00 PM Tom_L: skunkworks, have a chance to try out that rpi4 file?
06:00 PM Tom_L: the blacklist file
06:02 PM robotustra: tested today a boring head the first time
06:02 PM Tom_L: and?
06:02 PM robotustra: kind of interesting experience
06:03 PM robotustra: https://i.imgur.com/zh2etwd.jpg
06:03 PM robotustra: didn't brake anything
06:05 PM robotustra: learned how to do precise finish size by Stefen technique
06:06 PM robotustra: even if I don't need an exact size, did it just for training purpose.
06:07 PM robotustra: it's a mount plate for spindle motor
06:07 PM Tom_L: i've done a few 'training' exercises
06:11 PM robotustra: the only thing I'm not sure if the cutter should have a grove on the insert
06:11 PM robotustra: for chip breaking
06:11 PM robotustra: don't have such experience
06:16 PM Tom_L: get the rake angle right
06:18 PM robotustra: I tried right angle and small negative angle
06:19 PM robotustra: on a flat cutting tool
06:19 PM robotustra: both works, but right angle squicking more
06:19 PM Tom_L: https://www.harveyperformance.com/in-the-loupe/how-boring-bar-geometries-impact-cutting-operations/
06:21 PM robotustra: in here the top of the cutter is flat
06:21 PM robotustra: I'm curious if it can have a chip braker
06:22 PM robotustra: or it's not necessary
06:23 PM Tom_L: i don't think you need it
06:23 PM veegee: Got my poly strapping kit. I went for the thickest, strongest strap
06:23 PM veegee: It's very hard to work with
06:23 PM veegee: I should have gone for the normal stuff, way easier
06:25 PM robotustra: Tom_L, probably, because in theory boring head is mainly used for small material removal
06:30 PM skunkworks: CaptHindsight: that blacklist file seems weird..
06:31 PM skunkworks: https://pastebin.pl/view/2f57585f
06:32 PM robotustra: preparing for gear cutting https://i.imgur.com/6JcVU2w.jpg
08:39 PM robotustra: not bad https://users.encs.concordia.ca/~nrskumar/Index_files/Mech311/Lectures/lecture8.pdf
09:44 PM veegee: 5,000 kW, 1,800 RPM, solve for torque
09:44 PM veegee: I wish wolfram alpha did that so I don't have to do it by hand
09:44 PM veegee: 5,000W, not kW
09:47 PM veegee: Oh it does work!
09:47 PM veegee: `5000W/(1800/min) to N•m`
09:47 PM veegee: I just had to be a bit more explicit with the units
09:54 PM robotustra: damn, there is a shaper but it does not fit my room :) https://montreal.craigslist.org/tls/d/terrebonne-tour-shaper-scie-ruban/7200515241.html?lang=en&cc=us
09:55 PM Tom_L: move a wall
09:58 PM robotustra: and door ways also
09:58 PM SpeedEvil is now known as Guest36321
09:59 PM robotustra: easier to move to a house :)
10:05 PM veegee: or get out of montreal
10:05 PM veegee: overpriced, crowded, french
10:06 PM veegee: come to Toronto, you can use my workshop