#linuxcnc Logs

Jul 21 2021

#linuxcnc Calendar

12:47 AM randy: morning
01:31 AM -!- #linuxcnc mode set to +v by ChanServ
02:01 AM Deejay: moin
05:34 AM JT-Mobile: morning
05:36 AM XXCoder: hey
05:36 AM XXCoder: hows trip so far
05:48 AM JT-Mobile: good the dolly stampede was a real good show
05:50 AM XXCoder: tenn?
05:51 AM -!- #linuxcnc mode set to +v by ChanServ
05:51 AM XXCoder: tenn?
05:52 AM JT-Mobile: yea
05:56 AM XXCoder: cool
05:59 AM JT-Mobile: back to linux, done checking the stores and stuff
06:02 AM -!- #linuxcnc mode set to +v by ChanServ
07:06 AM perry_j1987: morning
07:07 AM JT-Mobile: yo
07:19 AM perry_j1987: i found a pneumatic 5c chuck
07:19 AM perry_j1987: thinking of pulling the cord and buying it
07:24 AM XXCoder: same
07:24 AM XXCoder: (unrelated to you perry)
07:24 AM perry_j1987: heh
07:41 AM perry_j1987: *dreams of putting some barstock in the lathe and having it turn it all into parts on its own while drinking coffee
07:41 AM CloudEvil: Wouldn't coolant be better than coffee for the lathe?
07:41 AM XXCoder: get a turret lathe
07:42 AM perry_j1987: lol
07:43 AM perry_j1987: ya i've been eyeballing an emco compact 5 turret to throw on here too
07:43 AM perry_j1987: doing combo turret and gang tooling
07:44 AM perry_j1987: the turret would be better to get first but havnt found any for sale lately
08:52 AM solarwind: Is anyone here an expert on TIG welding? Sorry for OT. I tried to find other channels, but this is the closest I could find that has people who would be knowledgeable on such topics.
08:53 AM solarwind: I need to repair a small casting, specifically the jaw of a small vise that does not have replaceable jaws.
08:53 AM CloudEvil: What's the material?
08:54 AM solarwind: I made the mistake of machining a V groove in the jaws instead of tapping holes to mount steel jaws. I made a mistake machining one of the sides and cut the V groove at an angle
08:54 AM CloudEvil: If it's cast iron, that is unfortunately problematic.
08:54 AM XXCoder: saw guy use brass solder to fill space
08:54 AM XXCoder: after grinding off some of breaks
08:55 AM XXCoder: dunno how strong it is
08:55 AM solarwind: So I'd like to simply fill it in and do a another pass.
08:55 AM solarwind: It is exactly this vise: https://images-na.ssl-images-amazon.com/images/I/81zTPhN4EqL._AC_SL1500_.jpg
08:56 AM CloudEvil: This is before it's cracked?
08:56 AM solarwind: It didn't crack, I machined a V groove into the jaws to be able to hold pipes
08:56 AM CloudEvil: Is this cast iron, or cast steel, or ...
08:56 AM solarwind: cast iron: it's this vise exactly: https://images-na.ssl-images-amazon.com/images/I/81zTPhN4EqL._AC_SL1500_.jpg
08:56 AM XXCoder: ahh
08:57 AM XXCoder: well you can always flatten it again and add 2 tapped bores
08:57 AM solarwind: I just made a silly mistake while machining the groove on one side and cut it at an angle
08:57 AM CloudEvil: Brazing is probably the repair of choice.
08:57 AM XXCoder: then add removable jaws to it
08:57 AM solarwind: Yes in hindsight, tapping holes was the way to go. Brain isn't as sharp as it used to be
08:57 AM XXCoder: well its still possible
08:57 AM CloudEvil: Tig brazing is a thing
08:57 AM XXCoder: or like cloud said
08:58 AM solarwind: CloudEvil you may be onto something.
08:58 AM solarwind: Flattening is not an option since it would take away too much material
08:58 AM solarwind: But brazing sounds like an option to avoid the possibility of cracking
08:58 AM CloudEvil: Strip it, get it nice and hot and clean, tig brazing.
08:58 AM solarwind: However I'm not afraid to preheat. And I have an oxy-acetylene torch
08:59 AM solarwind: CloudEvil ok, so TIG braze or oxy-acetylene braze?
08:59 AM CloudEvil: Or you could skip the tig and just do it oxy-ac.
08:59 AM CloudEvil: I have no particular thoughts on that.
09:00 AM CloudEvil: Other altenrative may be to make a matching machined bit out of cast iron or even mild steel and then treat it like a silver soldered joint, but with braze.
09:00 AM solarwind: Since the forces on the jaw are entirely compression, and relatively small since it's a bench clamp vise, sounds like anything would work
09:01 AM CloudEvil: This will use lots less braze, but flux would be more critical
09:01 AM solarwind: I will look into cast iron brazing then. I have the materials required for that already, but didn't know it was possible. Thank you everyone!
09:01 AM CloudEvil: Good luck.
09:01 AM CloudEvil: Brazing is one of the two commonly used repair techniques for CI.
09:02 AM CloudEvil: Nickel based electrodes and stick, with lots of heat is another.
09:02 AM solarwind: All the videos I've come across use nickel electrodes/filler and preheat. For some reason, brazing didn't seem to be as popular
09:03 AM solarwind: I may just experiment with TIG brazing to avoid the flux
09:03 AM CloudEvil: https://www.youtube.com/results?search_query=keith+rucker+braze
09:04 AM XXCoder: id suggest test it on scraps
09:04 AM XXCoder: see how it reacts etc if youre not experenced
09:04 AM CloudEvil: https://youtu.be/YWaF_QhcxA0?t=377 basically this exact case
09:04 AM XXCoder: even make groove on scrap to test filling it in etc
09:05 AM CloudEvil: Broken Gear Repair: Brazing Up and Machining New Teeth
09:14 AM XXCoder: nice video
09:38 AM solarwind: CloudEvil, is that a cast iron gear?
09:39 AM CloudEvil: yes
09:39 AM solarwind: That's a beautiful casting
09:39 AM CloudEvil: 1880? machine IIRC
09:41 AM solarwind: Yup, looks like brazing is the way to go for a nice steady temperature ramp up. And my application is the least critical in terms of strength requirements. Just filling in a V groove and tapping holes in it.
09:42 AM solarwind: It's a $15 vise, so even if it blows up, doesn't matter. I consider this practice anyway.
09:46 AM * JT-Mobile automates late 1800's machines
09:56 AM CloudEvil: https://youtu.be/NHRtlXDOqOU?t=77 found JT-Mobile
12:26 PM andypugh: JT-Mobile: I used the mallet closest to hand. I had a rubber dead-blow available too, but wanted a sharper strike.
12:26 PM andypugh: Now I have a cute little copper-faced one that I would have used.
01:30 PM JT-Mobile: I watched Roy Underhill make a 3 handled jointers mallet
01:36 PM roycroft: i've seen that episode
01:36 PM roycroft: one thing about roy
01:36 PM roycroft: it's not a day in the woodwright's shop if blood is not spilled
01:45 PM JT-Mobile: lol
01:45 PM JT-Mobile: or an opps moment
01:47 PM unterhaus: /msg NickServ IDENTIFY unterhaus ek2dos
01:52 PM CaptHindsight[m]: https://www.youtube.com/watch?v=Pq0wfU4ZaKk Cast Iron Crack repair LOCK-N-STITCH
01:52 PM CaptHindsight[m]: unterhaus: change your password
01:53 PM unterhaus: yeah :)
01:54 PM unterhaus: seems like a leading space shouldn't cause that behavior, but here we are
01:54 PM JT-Mobile: lol
01:54 PM CaptHindsight[m]: I've been bitten by the leading space as well :)
02:04 PM CaptHindsight[m]: https://vp.nyt.com/video/2021/07/20/94852_1_smoke-map-video-promo_wg_720p.mp4
02:05 PM unterhaus: it's well hidden, I must say. Have to notice there is a down arrow on your profile
02:11 PM andypugh: The forum is problematic in a number of ways that we can’t easily fix.
02:12 PM unterhaus: it's fine, just had to find it
02:31 PM CaptHindsight[m]: https://www.kunena.org/ is responsible for how the forum works, you get to choose it but unless you want to modify its source you're stuck with what the devs gave you for function
02:42 PM CaptHindsight[m]: websites and email have been down for 24+ hours, time to change web hosts
02:43 PM CaptHindsight[m]: they say that the server is NOT on fire
03:03 PM roycroft: who are you using for hosting, capthindsight?
03:12 PM unterhaus: the fact that the forum isn't always overrun by spam says it's not too bad
03:23 PM JT-Mobile: it's a bit of a chore to ban spammers, several of us work on it every day
03:25 PM glguy: unterhaus: If you're using weechat, that bug can be fixed with a /trigger
03:26 PM glguy: re: the space before your / leaking your command to chat
03:26 PM unterhaus: hexchat
03:27 PM unterhaus: JT-Mobile I guess I'm not on often enough to see
03:27 PM XXCoder: can aways add script to kill leading spaces
03:27 PM unterhaus: I moderate at a site owned by the people that sell vBullitin and we still get spammers
03:27 PM JT-Mobile: we are pretty quick to delete the post and ban the user :)
03:28 PM unterhaus: have to post 10 posts before links or pics and can only post 5 times a day on the first 2 days
03:28 PM unterhaus: But most spammers don't get an account due to their filters
03:28 PM JT-Mobile: AFAIK Kunena does not have that choice, but it's a good idea and I'll look
03:29 PM unterhaus: yes, only the most motivated spammers get through that
03:41 PM roycroft: most spammers are both highly motivated and lazy at the same time
03:45 PM unterhaus: it's pretty clear that there are at least 3 people behind every spam
03:45 PM unterhaus: I recently banned an account that had been set up over 10 years
03:47 PM unterhaus: so if I want to set up a simple step-dir system, is the 7i92 the cheapest option?
03:47 PM roycroft: two russians and a russian operative?
03:47 PM JT-Mobile: 7i96
03:57 PM * Tom_L wonders where JT-Mobile is mobile from today
03:59 PM JT-Mobile: still mobile
04:00 PM JT-Mobile: heading home tomorrow
04:01 PM Tom_L: how's the weather been?
04:09 PM JT-Mobile: pretty nice over here a bit of rain but not hot
05:08 PM roycroft: my kumiko mitering jigs are coming along nicely
05:09 PM roycroft: the next step is to install some threaded inserts in the bases of them, and a delivery from McMaster is arriving presently with those very inserts
05:09 PM * roycroft likes it when timing works out like that
05:13 PM CloudEvil: :)
05:24 PM CaptHindsight[m]: I tried Dreamhost for a month and didn't like the mailserver
05:24 PM CaptHindsight[m]: anyone have a good webhost?
05:25 PM CaptHindsight[m]: don't need a VPS but maybe that is the only way to have things runs smoothly thsese days
05:30 PM CloudEvil: I note this instance is run on google cloud server, on the 'always free' tier due to the free trial running out.
05:31 PM CloudEvil: Most websites however would exceed this pretty meager bandwidth allowance.
05:35 PM perry_j1987: hows it going guys
05:39 PM CloudEvil: (also, the free trial periods allowance is veryconsiderably more generous)
05:40 PM CloudEvil: (one year) and you can then move onto the amazon/microsoft comparable offerings trial
05:42 PM perry_j1987: scored something nice today
05:43 PM CloudEvil: :)
05:43 PM perry_j1987: office building nearby gave me 6 sitting/standing desk arm units
05:43 PM perry_j1987: originally were about 600 they said each heh
05:43 PM perry_j1987: got one setup for my cnc lathe station now heh
05:47 PM roycroft: i've been fairly happy with interserver
05:47 PM roycroft: i have vps' at various providers
05:48 PM roycroft: vultr.com are also pretty good
05:48 PM roycroft: and you can petition them to allow you to operate a mail server
05:48 PM roycroft: they approved my petition
05:48 PM roycroft: i would stay as far away from hostwinds and hostgator as possible
05:50 PM CaptHindsight[m]: looked at those a few years ago
05:51 PM CaptHindsight[m]: 200GB/mo for traffic is plenty
05:51 PM CaptHindsight[m]: I just want it to be up and not be too slow
05:52 PM CaptHindsight[m]: used to have Liquid Web
05:52 PM CaptHindsight[m]: down was faster than our ISP
05:52 PM roycroft: my boss wanted web hosting providers when we shut down our own data center
05:52 PM roycroft: i argued with him until i was blue in the face about it
05:52 PM CaptHindsight[m]: but they dropped all the shared plans
05:52 PM roycroft: finally i gave in and let him move some websites to a web hosting provider
05:53 PM roycroft: a week or so later i started buying various vpses and building webservers on them
05:53 PM CaptHindsight[m]: and never spent more than a few minutes waiting for a down site after a phone call
05:53 PM roycroft: and moved the sites off the web hosting providers to the vpses
05:53 PM roycroft: of course, he pre-paid for a year of hosting with the webhost providers, who do not offer refunds
05:54 PM roycroft: because that's how you test something
05:54 PM roycroft: anyway, of the ones i've tried, i'm happiest with interserver and vultr.com
05:55 PM roycroft: hostwinds just suck as far as performance and stability go
05:55 PM CaptHindsight[m]: "but prepay was such a deal" :)
05:55 PM roycroft: hostgator, well this is all i can say
05:55 PM roycroft: the seemed a decent outfit
05:55 PM roycroft: so i signed up for a vps
05:55 PM roycroft: and it was cheap - like $6/month
05:56 PM roycroft: i went to their portal to set it up, verified the certificate (as i always do when i'm about to disclose sensitive information), then typed in my credit card number
05:56 PM roycroft: less than 30 seconds later i got a fraud alert from my cc company on a large purchase attempt in hong kong, and they had frozen my card
05:56 PM CaptHindsight[m]: handy
05:57 PM roycroft: i reported this to hostgator, wanting to be a nice person and letting them know that they may been compromised and they should probably have their security folks take a look
05:57 PM CaptHindsight[m]: well they just wanted to be secure enough to get your payment, after that it's your problem
05:58 PM CaptHindsight[m]: what security folks?
05:58 PM roycroft: their response was to accuse me of trying to extort money from them, and demanding proof that i had suffered a financial loss, and evidence that it was they who caused it
05:58 PM CaptHindsight[m]: oh nice
05:58 PM roycroft: i replied that fortunately my cc issuer had blocked the bogus charge
05:58 PM roycroft: and their resonse to that was "then why are you contacting us at all?"
05:59 PM CaptHindsight[m]: go away
05:59 PM roycroft: so i would advise staying as far away from them as possible
05:59 PM CaptHindsight[m]: Dijupayus?
05:59 PM roycroft: no, i do not have any proof that the compromise was at their site
05:59 PM roycroft: but i've had that card for years, and i've always been very careful about how i use it
05:59 PM CaptHindsight[m]: I would be happy to come and inspect your servers
06:00 PM CaptHindsight[m]: please provide me with all your passwords
06:00 PM roycroft: while correlation is not causation, in this case it seems likely enough that if i were them i'd investigate my servers
06:00 PM CaptHindsight[m]: current host said " we should get back to you in 24 - 48 hours"
06:01 PM roycroft: i never accused them of anything - i just told them what happened, and that i'm careful with my card, and the way things unfolded, it might be prudent to at least check on things to see if there's a problem
06:01 PM CaptHindsight[m]: for site and email being down
06:01 PM roycroft: i had a minor issue with interserver yesterday
06:01 PM CaptHindsight[m]: I asked if the servers are on FIRE
06:01 PM roycroft: i reported it, and told them it was urgent
06:01 PM CaptHindsight[m]: are all the admins dead?
06:01 PM roycroft: 20 minutes later not only was the problem fixed, they told me exactly what happened
06:02 PM roycroft: i guess it really wan't "minor" if it was urgent
06:02 PM roycroft: our websites could not send emails
06:02 PM CaptHindsight[m]: host doesn't even update the status page of the network
06:02 PM roycroft: and it turned out to be an acl problem on their end
06:02 PM CaptHindsight[m]: "no current network issues"
06:02 PM roycroft: "head firmly planted in sand - no ticket penetration"
06:02 PM _unreal_: Tom_L, I think t4nk_freenode has lost his mind... if you dont mind a PM bomb. i'LL pm YA
06:02 PM CaptHindsight[m]: they muck with our severs all the time, usually get some permission wrong
06:03 PM CaptHindsight[m]: so no images load or similar
06:03 PM * roycroft does not give up root
06:03 PM Tom_L: a short one would be ok
06:04 PM _unreal_: lol
06:04 PM roycroft: i don't know what your needs are, but you can get a decent vps at interserve for like $24/month that would probably handle everything a medium-size website would need
06:04 PM _unreal_: SELL YA short
06:05 PM roycroft: so i'm making some iron juice to rub on woods with lots of tannic acid, like walnut
06:05 PM roycroft: i took steel wool pad, washed the oils out of it with soapy water, rinsed it, then dunked it in lacquer thinner to clean any other residue off
06:06 PM roycroft: i let it dry completely, then dunked it in a jar of distilled vinegar
06:06 PM roycroft: it just sat there and sat there
06:06 PM roycroft: for days it did nothing, or seemed not to
06:06 PM roycroft: i was beginning to wonder of something went wrong
06:07 PM roycroft: then today, in a matter of a couple hours, the steel wool almost completely dissolved, and the vinegar turned from crystal clear to deep grey
06:07 PM perry_j1987: boy wish i knew about this trick earlier... just for giggles i gave it a try in tool touchoff on my lathe to get radius i can input diameter / 2 and it calculates it haha
06:07 PM roycroft: and yeah, i put a drop of the stuff on a little piece of walnut, and it turned jet black instantly
06:11 PM _unreal_: so I did an interview the other day at a machining company the other day. they said I made there current CAD guy look like an armature... hehe
06:11 PM _unreal_: I was like "TO MY SELF" I'm self taught..
06:15 PM Tom_L: getting out of the boat repair business?
06:15 PM _unreal_: more like a latteral move
06:15 PM _unreal_: boats are everything in south FL
06:16 PM _unreal_: I have several companyies making offers
06:16 PM _unreal_: my "parent company" that I have been with the last several years has ahh... under grown me...
06:16 PM _unreal_: time to move on
06:17 PM _unreal_: that andI'm tired of being the smartest one ther and being told..... your going to do it wrong and like it
06:17 PM XXCoder: roy interesting. what properies does that import
06:17 PM _unreal_: only to have it to my way days/weeks later at there loss
06:18 PM CaptHindsight[m]: https://www.interserver.net/
06:19 PM Tom_L: _unreal_, so you're getting paid twice to do the same job and complaining about it????
06:19 PM Tom_L: :)
06:20 PM _unreal_: no
06:20 PM Tom_L: sense a little sarchasm there
06:20 PM _unreal_: I'm dealig with BS in the ear over the loss on a quoted job..... that I told them to follow my lead
06:20 PM roycroft: florida seems to be shunning the big boats though
06:20 PM XXCoder: why?
06:20 PM _unreal_: My name is VERY well known
06:20 PM XXCoder: isnt it 99.99% harbor heh
06:20 PM CaptHindsight[m]: roycroft: the $6 or $12/mo plan looks good enough
06:21 PM _unreal_: hell 2019 I was in a reality TV series
06:21 PM _unreal_: on luxury yachts
06:21 PM roycroft: xxcoder: the iron reacts with the tannic acid and dyes the wood black
06:21 PM roycroft: capthindsight: if they look interesting to you do you mind if i send you a referral code?
06:21 PM XXCoder: yea though do it add resistance to anything? or is it looks thing
06:21 PM roycroft: that would help me out, but it's not why i mentioned them
06:21 PM roycroft: i really am happy with them
06:22 PM roycroft: xxcoder: it's just a dye
06:22 PM XXCoder: cool :)
06:22 PM CaptHindsight[m]: no problem
06:22 PM XXCoder: i wonder if sand down a little, would it expose grains but mostly dark
06:24 PM roycroft: they offer substantial discounts the first month
06:24 PM roycroft: xxcoder: it's a dye, not a pigment stain
06:24 PM XXCoder: whats difference between those
06:24 PM roycroft: you can't sand too deeply, but you can sand lightly without the color fading
06:25 PM XXCoder: so dye dont go too deep, while stains do
06:25 PM roycroft: a dye reacts chemically with the wood fibers and permanently colors them
06:25 PM roycroft: actually a dye goes a lot deeper than a stain
06:25 PM XXCoder: ohh
06:25 PM CloudEvil: 'they sanded too greedily and too deep'
06:25 PM roycroft: think of a stain like wiping mud on it
06:25 PM CloudEvil: Sometimes actual mud.
06:25 PM roycroft: yes
06:26 PM roycroft: with a stain you're putting particulate matter on the wood
06:26 PM roycroft: and it fills in the cracks and crevices
06:26 PM roycroft: but it doesn't go very deep
06:26 PM roycroft: if you buy some stain, you have to stir it up before you use it
06:26 PM XXCoder: thats nice way of putting ut. thanks :D
06:26 PM roycroft: because the pigment settles to the bottom
06:27 PM roycroft: if you buy some dye, you don't have to stir
06:28 PM XXCoder: wonder if usable for effects on wood stuff, though i bet it would spread out anyway so cant have sharp borders
06:28 PM roycroft: i like dyes a lot because they penetrate deeply, and because i can control them so well
06:28 PM CloudEvil: Stains - pigment tends not to migrate much.
06:28 PM roycroft: and because i can sand on them
06:29 PM roycroft: i can take some dye, thin it out, and then when i wipe it on the color is muted
06:29 PM roycroft: stains don't work out so well like that
06:29 PM roycroft: they tend to get blotchy if you thin them too much
06:29 PM roycroft: and i can apply multiple coats of dye, of different colors, to get effects i want
06:30 PM roycroft: those drawer pulls i just made, for example
06:30 PM roycroft: i died the mahogany a color called "merlot red"
06:30 PM roycroft: and it does look a lot like a merlot - an intense, deep red color
06:31 PM roycroft: then i put some brown dye over that, and got the shade i wanted
06:31 PM CloudEvil: https://en.wikipedia.org/wiki/Thermally_modified_wood Inote, for those not familiar with.
06:31 PM roycroft: well, it was a bit more brown than i wanted at that state, but that was fine
06:31 PM CaptHindsight[m]: engine block is soaking in electrolytic derust tank for a few days, 90% came off after 24 hours
06:31 PM roycroft: i sealed the dye with some shellac, so nothing would modify it further
06:31 PM CloudEvil: If you want darker wood, and you are OK with much less flexibility and somewhat higher rigidity.
06:32 PM roycroft: then i used some grain filler, to which i added some coal black and van dyke brown artist's pigments, and leveled out the pores with that
06:32 PM CloudEvil: Softwood acts much like it's a hundred years old.
06:32 PM CaptHindsight[m]: https://i.imgur.com/hXOXTJ5.jpg camshaft pits are only a few microns at most
06:33 PM roycroft: when all that was done i used varnish oil for the finish, which yellows the wood a bit, and toned down the brown somewhat, giving me almost exactly what i wanted
06:33 PM CloudEvil: Could polish up well, though I question if that'd be useful.
06:33 PM Tom_L: CaptHindsight[m], are the tops of the lobes pitted?
06:33 PM roycroft: then i mixed some artist's pigments in some furniture wax, and applied a couple coats of wax, and they turned out really nice
06:33 PM CaptHindsight[m]: nope, just the bottoms and it's roller lifters
06:34 PM roycroft: getting a good finish on wood is usually not a matter of just wiping something on - you have to build the finish
06:34 PM CaptHindsight[m]: https://i.imgur.com/fUpRPD3.jpg first fright
06:35 PM Tom_L: gawd, was that sitting in a lake?
06:35 PM Tom_L: or is that oil
06:36 PM XXCoder: some rust some 500 year old oil
06:36 PM CaptHindsight[m]: I think it sat for a year outside in the snow and rain
06:36 PM CaptHindsight[m]: the oil spout was not on so rain and snow could enter one valve cover
06:37 PM Tom_L: i took one apart once that looked like somebody poured tar inside the oil was that gunked up
06:37 PM CaptHindsight[m]: not much gunk inside, that was all rust
06:38 PM CaptHindsight[m]: a 25 cent plastic bag would have saved me the trouble
06:38 PM CaptHindsight[m]: and now that it's all torn down and alomost clean I see a brand new one on CL for $750
06:39 PM Tom_L: hah
06:39 PM CaptHindsight[m]: https://racine.craigslist.org/pts/d/racine-new-35-gm-engine-fits-impala/7342417551.html
06:40 PM CaptHindsight[m]: mine was $300 with the trans
06:40 PM Tom_L: what year is the one you're working on?
06:40 PM CaptHindsight[m]: the engine is a '07
06:41 PM CaptHindsight[m]: car is an '85 Fiero
06:42 PM CaptHindsight[m]: should be ~260hp at the crank with open source ECU tune, headers and some other small tweaks
06:43 PM CaptHindsight[m]: i could change cams at this point and get ~300hp and give up some idle smoothness and mpg's
06:44 PM CaptHindsight[m]: iron block with alu heads, they are near polished from the factory
06:45 PM CaptHindsight[m]: roller lifter, roller rockers from the factory, we used to pay way extra for that way back when
06:46 PM CaptHindsight[m]: stock cam is .270 lift with 1.7 rockers = 0.459" valve lift with VVT
06:47 PM CaptHindsight[m]: the earlier 60deg engine cams fit with spacers but then you loose the VVT
06:48 PM CaptHindsight[m]: 9.6:1 compression stock and it's easy to go .620 lift with the factory parts
06:48 PM Tom_L: does that start getting close to the piston?
06:48 PM CaptHindsight[m]: maybe just thicker valve springs
06:49 PM CaptHindsight[m]: over .620 lift with enough duration
06:50 PM CaptHindsight[m]: pistons actually have a small valley at 9.6:1 https://i.imgur.com/KrR1Y36.jpg
06:51 PM Tom_L: i saw that pocket
06:51 PM Tom_L: that journal looks like shit
06:51 PM CaptHindsight[m]: https://i.imgur.com/MnjrZTE.jpg GM put the biggest valves in they could fit
06:51 PM CaptHindsight[m]: crank cleaned up well
06:51 PM CaptHindsight[m]: soaked for 2 days in tank
06:53 PM CaptHindsight[m]: not bad for an old style pushrod engine
06:53 PM Tom_L: i haven't been inside one in several years now
06:54 PM CaptHindsight[m]: 2400 lb car
06:54 PM Tom_L: i recall once somebody brought a nascar head to my bud's shop to measure it on the cmm
06:55 PM Tom_L: i dunno who or what it was for
06:56 PM CaptHindsight[m]: do they have to warm Nascar engines up before they start them like F1?
06:57 PM Tom_L: i'm sure they probably do
06:57 PM Tom_L: at least the oil
06:57 PM CaptHindsight[m]: F1 is an interference engine below 80C or so
06:58 PM Tom_L: closest i ever got to one of those was a little 4 cyl lotus
06:59 PM Tom_L: kinda like flying the SR71
06:59 PM CaptHindsight[m]: this one the factory rev limits to 6400rpm
07:00 PM CaptHindsight[m]: with ARP rid bolts people reach 7K, but not for long
07:00 PM Tom_L: must be worried about valves floating
07:00 PM CaptHindsight[m]: rid/rod
07:01 PM Tom_L: iirc they're getting 9 or more from those nascar engines
07:01 PM Tom_L: F1 sound like bumble bees
07:01 PM CaptHindsight[m]: factory rod bolts have held up to 600HP reliably, but <6500 rpm
07:02 PM CaptHindsight[m]: yeah 15,000 rpm
07:02 PM perry_j1987: i got a question guys
07:03 PM CaptHindsight[m]: i remember motorcycles in the 80's only reached 10K rpm with lots of work
07:03 PM Tom_L: i wonder what the bore size is on those
07:03 PM perry_j1987: i have these dc servos on this lathe that i setup a number of months ago with geko g320x drivers
07:03 PM Tom_L: small bore more pistons?
07:03 PM CaptHindsight[m]: https://www.caranddriver.com/features/a15150520/technical-secrets-of-an-f1-engine-learned-in-toledo/
07:04 PM CaptHindsight[m]: ~3.8" with short stroke
07:04 PM perry_j1987: the scale is 1609.839 on Z and 1606.166 on X
07:04 PM perry_j1987: im now trying to figure out why they have diff scales same servos same ballscrews
07:04 PM perry_j1987: and also trying to figure out how i came up with these nubmers in the first place...
07:05 PM CaptHindsight[m]: small math error?
07:05 PM perry_j1987: i believe the encoders on them are 1000ppr so 4000
07:05 PM perry_j1987: wouldnt these geko g320x drivers just use the encoder number alone?
07:05 PM CaptHindsight[m]: what screw pitch?
07:05 PM perry_j1987: there's something im forgetting here
07:06 PM Tom_L: so they likely don't have an awful lot of torque
07:06 PM Tom_L: rely on high revs
07:06 PM CaptHindsight[m]: yeah
07:07 PM CaptHindsight[m]: not like supefuel drag :)
07:08 PM perry_j1987: looking back through my notes now
07:08 PM Tom_L: perry_j1987, lack of notes will haunt you eventually :)
07:09 PM CaptHindsight[m]: how far does the screw turn in one turn and 4000 counts per turn
07:11 PM CaptHindsight[m]: what you need to know to set the scale
07:12 PM CaptHindsight[m]: maybe you didn't know the pitch so you measured
07:12 PM CaptHindsight[m]: and got close
07:12 PM perry_j1987: appears maybe 2mm from peek to peek
07:13 PM perry_j1987: i think what i may have done is gotten close and then tried to do math to dial it in closer
07:13 PM Tom_L: i based my scale on the acutal max voltage going to my vfd not 10v so my numbers for that look a little odd too
07:16 PM CaptHindsight[m]: unknown screws?
07:17 PM CaptHindsight[m]: 10 TPI = 2.54mm
07:17 PM perry_j1987: came with the machine
07:17 PM perry_j1987: its that techno isel 9x20 lathe
07:17 PM CaptHindsight[m]: 2mm screws should be pretty darn close to 2mm
07:18 PM perry_j1987: it deff looks like 2mm
07:18 PM perry_j1987: if i set calipers to 2mm and put them up it lines right up peak to peak
07:18 PM perry_j1987: 2.54 matches nothing lol
07:20 PM CaptHindsight[m]: any pulley or gears involved?
07:20 PM perry_j1987: direct drive
07:27 PM perry_j1987: not sure if i disconnected (testing) im on cellphone hotspot out here
07:52 PM * JT-Mobile feels like a tick ready to drop off a deer
07:53 PM perry_j1987: it deff seems like its around 2.5mm pitch though
07:53 PM perry_j1987: if put the scale at 1600 (4000 / 2.5 )
07:54 PM perry_j1987: and put calipers on there and zero it out and tell it to move 10mm it moved 9.96mm
07:55 PM JT-Mobile: pretty hard to measure 00015" with a caliper...
07:59 PM perry_j1987: aye
07:59 PM perry_j1987: is there an imperial ballscrew this could be?
08:00 PM perry_j1987: measures 0.585in diameter
08:00 PM perry_j1987: which sounds more purposful than 14.87mm
08:01 PM JT-Mobile: could be 0.100" pitch but a longer measurement may be better
08:04 PM jepler: Does your measurement of 9.96mm exclude backlash, for instance by starting with a move of 1mm +ve, then measure, then 10mm +ve ?
08:04 PM jepler: also firm seconding to measure a longer motion if possible
08:04 PM perry_j1987: ok i just moved away and back in to z0 so went z5 and then back to z0 and then did g0 z-40
08:05 PM perry_j1987: and got 39.95 with these crappy calipers
08:05 PM perry_j1987: with scale of 1600
08:05 PM perry_j1987: so must be 2.5mm pitch
08:05 PM jepler: so each time you've got your 2.5mm pitch plus an error from some source of about .045mm that is not proportional to the distance
08:06 PM jepler: if it were the 2.51mumble that 9.96mm indicated, then your 40mm move should have been 39.84 but it doesn't seem to be
08:20 PM perry_j1987: im convinced its 2.5 pitch now
08:21 PM perry_j1987: been playing with it bunch since i've been quiet heh
08:21 PM perry_j1987: measured it with everything i got
08:21 PM Tom_L: not 2.54?
08:22 PM perry_j1987: ya
08:22 PM perry_j1987: tested with 2.54 as well for giggles
08:22 PM perry_j1987: and nothing comes out right
08:23 PM perry_j1987: now im measuring with 1600 for scale and its all measuring out perfect
08:29 PM perry_j1987: now if only i could figure out why fusion 360 is making weird swooping radius cuts on this grooving op
08:31 PM Tom_L: quadrants wrong?
08:31 PM perry_j1987: its like when it goes into do the finish pass it swoops in
08:31 PM perry_j1987: instead of making sharp corners
08:31 PM perry_j1987: doesnt show it in the simulation though...
08:32 PM Tom_L: what radius compared to the tool radius?
08:33 PM Tom_L: maybe they're too close to the same
08:33 PM perry_j1987: the model doesnt have a radius in the corner
08:33 PM perry_j1987: just a groove
08:33 PM Tom_L: mmm
08:33 PM perry_j1987: the tool has .2mm radius to it which i did tell fusion about
08:37 PM perry_j1987: is there anything on linuxcnc side that could be causing that
08:37 PM perry_j1987: the simulations in fusion look spot on to what im expecting it to do
08:38 PM JT-Mobile: did you set the path tolerance?
08:38 PM perry_j1987: just default
08:38 PM perry_j1987: 0.01mm
08:39 PM JT-Mobile: then you get "as fast as possible with no regard to path"
08:42 PM -!- #linuxcnc mode set to +v by ChanServ
08:47 PM perry_j1987: testing
08:47 PM Tom_itx: https://grabcad.com/challenges/nasa-challenge-lunar-torch?mkt_tok=NTMzLUxBVi0wOTkAAAF-aV2gmCMWd0y5bmqJunMjBRemd6p3CL---Yl8vR4E24olx331TYGVmm1AdH8k93cQmz-KkasOIV2SOGIVQbiIQRIWGAnVAJDIrgJw_cXIecHTyas
08:47 PM Tom_itx: need some quick cash?
08:54 PM JT-Mobile: need sleep
09:09 PM perry_j1987: ended up just making another path and selecting the bottom corner of the groove and doing single groove down each side to clean it up heh
11:10 PM perry_j1987: so guys are fitting bicycle disc brakes to their lathes as spindle breaks eh? heh