#linuxcnc Logs

May 17 2021

#linuxcnc Calendar

12:02 AM Bleepshop: _unreal_: Yeah, It'd really suck to cut yourself a nice snap-together box out of acrylic, the bottom of the machine, the floor, the downstairs neighbors floor, ect, etc... xD
12:11 AM * Bleepshop is cutting 17mm thick, 17 ply at 0.0625" per pass with a single edged 1/4" cutter.
12:15 AM Bleepshop: XXCoder: This is the kind of stuff I'm using to protect my table for now. Got an entire case of it that was leftovers from a flooring job a friend did. https://www.lowes.com/pd/SMARTCORE-Naturals-5-in-Hot-Springs-Hickory-Engineered-Hardwood-Flooring-20-01-sq-ft/1000768918
12:15 AM XXCoder: yeah
12:16 AM XXCoder: just that your discription sounded like child mat ;)
12:23 AM XXCoder: nice tho
01:07 AM Deejay: moin
01:08 AM veegee: https://www.model-engineer.co.uk/forums/postings.asp?th=90977 beautiful diagram
01:42 AM Loetmichel: mornin'
01:42 AM Loetmichel: hmm... wrote 22k chars this weekend. Still a good 10k short for my goals. And still the magic training to do before i can finish this second chapter and send it to the Editor... Writing a SciFi/Fantasy story series starts to look like work :) Well, lets do the work that brings in the cash for a good 8 hours, then continue. :)
01:57 AM veegee: https://www.youtube.com/watch?v=2Hd348CNQ1Q "HOW QUICK IS THAT!"
01:58 AM veegee: Well... yeah, when you have years of CAD experience and know all the keyboard shortcuts
02:12 AM CaptHindsight: veegee: try machining stainless in a hurry for more fun
02:13 AM CaptHindsight: Loetmichel: you too! I've been writing about the Uranian takeover plots here
02:13 AM veegee: I have a feeling stainless is easier than hardened cast iron
02:13 AM veegee: I have to anneal it, no other way
02:13 AM veegee: It's ruining my carbide bits too
02:13 AM CaptHindsight: until you heat it
02:14 AM veegee: Yeah I know about the work hardening
02:17 AM CaptHindsight: Loetmichel: it's about a civilization that is at war with the Turds
04:06 AM Tom_L: morning
05:45 AM jthornton: morning
06:46 AM Loetmichel: veegee: IIRC stainless does work harden like Hardox. ITs a PITA to machine compared to mild steel
07:37 AM Tom_L: cloudy & 76F today
07:42 AM jthornton: rain and 64°F here
09:15 AM drdoc: veegee: you probably want to normalize rather than anneal
09:18 AM drdoc: I don't know much about cast iron but a lot of steel alloys make carbide crystals or even layers when they work harden
09:19 AM drdoc: annealing softens the metal around that but it takes a good long soak to absorb the carbon back into the matrix
09:23 AM drdoc: I have 20-30 lb of W2 that I got for next to nothing because the guy flattened 1.25" rod into bar stock on a power hammer and then tried to work it without normalizing
09:24 AM drdoc: it would drill halfway through no problem and then grab the bit and take chunks off it
10:05 AM roycroft: ups send me an invoice for $2 for a "missing pld charge"
10:05 AM roycroft: i have not shipped with them in at least 3-4 years
10:05 AM drdoc: nice
10:05 AM roycroft: they told me its a hassle to research it, and it would be easier if i would just pay it, because it's only $2
10:06 AM drdoc: "NMP. It would be even easier if you just wrote it off."
10:06 AM roycroft: this alleged shipment was from kentucky to kentucky
10:06 AM sensille: it would be even easier if they just dropped it
10:06 AM roycroft: yes
10:07 AM roycroft: they also told me that the rest of the fees had been paid
10:07 AM roycroft: i pointed out to them that this alleged shipment was on 5 may 2021
10:07 AM drdoc: who the hell claims an unpaid invoice than then carps about proving it????
10:07 AM roycroft: i also pointed out to them that the credit card i have on file with them expired in 2019
10:07 AM drdoc: lol
10:08 AM roycroft: so now i'm waiting for a supervisor
10:08 AM drdoc: nice
10:08 AM roycroft: because i need proof that this is a legitimate charge
10:08 AM roycroft: which they cannot provide
10:08 AM drdoc: my Spousal Equivalent shocked me speechless last night
10:10 AM drdoc: she noticed me reading OneCNC brochures and basically wanted to know why I'm looking at yet another "garage program"
10:10 AM drdoc: when I'm already totally swamped with choices.
10:11 AM drdoc: I told her about that ebay listing, she asked some questions like "and this one you can actually sell if you don't like it?"
10:11 AM drdoc: and then she offered to buy it if it's what I need and "a crazy good deal"
10:12 AM drdoc: I think mostly to shut me the hell up.
10:16 AM roycroft: i was just informed that the $2 charge will be removed, and that i will get another bill from them next month with more charges for this shipment
10:16 AM drdoc: lol
10:16 AM roycroft: they "confirmed" that a shipment was made using my account number
10:16 AM roycroft: so i asked for their fraud department, and was told that it is a legitimate shipment
10:16 AM drdoc: "we screwed the pooch and have found a way to fix it without admitting anything."
10:17 AM roycroft: then i demanded that they close my ups shipping account, and they told me that's handled by a different department and that i would have to queue up to talk to that department
10:17 AM drdoc: how did they explain shipping on the strength of an expired CC?
10:18 AM roycroft: no explanation
10:18 AM roycroft: but that's probably why there will be more charges next month - the cc did not work
10:18 AM drdoc: this sounds like a never-ending clusterfuck
10:21 AM roycroft: well closing the account should help
10:21 AM roycroft: if i can do that
10:21 AM roycroft: i should probably send them a letter via usps, but my recent experience is that paper correspondence gets ignored by most vendors
10:22 AM roycroft: they don't know how to deal with it
10:22 AM drdoc: I had a credit card a few years back that took 2 years to close
10:23 AM drdoc: it was a secured card I got when my credit was crap, so they owed me rather than me owing them
10:24 AM drdoc: took a registered letter from a lawyer to make them give me my money and go away
10:43 AM roycroft: a long, long time ago i moved from washington to oregon
10:43 AM roycroft: i had just sold my isp, and closed my bank accounts there
10:43 AM roycroft: i made the mistake of using the same bank when i moved to oregon
10:44 AM roycroft: some months prior to moving, a check to uswest sent from my business account was lost
10:44 AM roycroft: i had put a stop payment on the check, paid the fee to do so, and reissued the check
10:44 AM roycroft: several months later, my personal checking account was overdrawn
10:45 AM roycroft: i found out that the original check had been deposited, and paid out of my long-closed business account in a different state
10:45 AM roycroft: however, my agreement with my bank (in the tiny tiny print) allowed them to take the money from any current account i had
10:46 AM roycroft: the tiny tiny print also said that if i pay them money to stop payment on a check, they would try to stop payment, but if they paid it anyway it's not on them
10:46 AM roycroft: i never recovered that money
10:46 AM roycroft: and i never mix personal and business accounts at the same financial institution any more
10:48 AM andypugh: drdoc: YouTube allow upload of captions. I did that with the latest video. It’s no trouble now that I know about it as I need to write down what I intend to say anyway, or I am even less intelligible. All I had to do was upload a text file and the YouTube magic automatically puts them in (approximately) the right place.
10:52 AM drdoc: andypugh: me and deef f***ers everywhere thank you.
10:55 AM drdoc: Seriously, good captions move an instructional video from an exhausting nightmare to at least bearable
10:58 AM drdoc: roycroft: yeah. Since Ebay's started dealing direct with the bank instead of through Paypal, I will be making an LLC before I sell anything again
11:00 AM roycroft: i have a separate bank account just for ebay/paypal
12:23 PM enleth: roycroft: an actual paper check? are those things still being used for anything?
12:24 PM roycroft: this was in the early 1990s, enleth
12:25 PM roycroft: but i do still have to use physical checks for a few things today
12:25 PM roycroft: and ups just sent me a "customer satisfaction" survey
12:26 PM roycroft: while i don't want to waste any more time with them, i think i'll fill out the survey
12:26 PM roycroft: i suspect they won't like my responses
12:26 PM enleth: roycroft: ah, that makes more sense
12:38 PM * JT-Shop hasn't used the Millermatic 212 in quite some time... it sure does lay down a nice bead
12:39 PM roycroft: i wish i had a decent mig welder
12:40 PM roycroft: my tig welder is nice, but the mig welder is a tiny lincoln electric that does not have enough power adjustment to do much of anything decently
12:42 PM roycroft: i'm not sure i'd want a miller 212 though - those things are huge
12:44 PM drdoc: so sweet though
12:48 PM Tom_L: mine is the 175 iirc
12:54 PM roycroft: when i finally upgrade mine i'll almost certainly get a compact, energy-efficient inverter model vs. a behemoth transformer model
12:54 PM roycroft: shop real estate is just too expensive for me
12:54 PM roycroft: fortuntely there are some good inverter mig welders
12:57 PM skunkworks: andypugh: does the foundry by you cast for anyone? Or do you have an 'in' there?
12:59 PM andypugh: He will cast for anyone, I am just another customer.
01:00 PM skunkworks: Neat!
01:00 PM rs[m]: andypugh: does it really make sense to cast such a piece that is relatively prismatic in shape?
01:01 PM andypugh: https://ajd-foundries.business.site
01:01 PM rs[m]: doesn't look like waste in chips would be that much more if you started from a square block
01:02 PM andypugh: Making it from a plasma-cut square would have been relatively easy, but the castings were £36. I don’t think I would get a 6” square cut from 2” plate for that.
01:03 PM skunkworks: have you machined cast? The less you have to the better :)
01:03 PM andypugh: Plus, the foundry is a very useful resource that I want to keep in business.
01:03 PM rs[m]: ok. i have no idea.
01:03 PM skunkworks: (actually - a vaccum cleaner works very well to keep the dust down..
01:06 PM Tom_L: lakeshore is awesome, i called about these cutters i got from them to see what they advised for chip load. Carl told me these were better suited for SS and offered to swap me for a more suitable cutter if i had time to wait for them. I told him i'd run some test cuts and was pretty impressed with the job these did on aluminum.
01:19 PM rs[m]: my local steel pharmacy takes €55 for 2 pieces 150×150×50 of St37
01:32 PM drdoc: Tom_L: wow
01:44 PM CaptHindsight: https://maedlernorthamerica.com/shop/
01:45 PM CaptHindsight: didn't know they had a USA branch
02:06 PM Rab: Good prices on timing pulleys.
03:44 PM veegee: drdoc Normalizing isn't designed to soften
03:44 PM veegee: drdoc Annealing is specifically for reducing hardness for the purpose of easier machining
03:44 PM veegee: drdoc Normalizing is for stress relief'
03:45 PM veegee: Loetmichel yes you're right stainless steel does work harden when machining and the heat stays with the workpiece instead of being carried by the chips. That being said, if you have the right technique, it's not a huge problem
03:45 PM veegee: Interrupted cuts can be tricky though
03:46 PM veegee: This hardened cast iron is however the hardest thing I've tried machining. It wrecked my carbide inserts and I've never chipped a carbide insert in my life
03:46 PM Rab: I find 316 to be the most difficult. If I have the ability to specify, I use 303.
03:46 PM veegee: It just ate them like nobody's business
03:46 PM veegee: Yeah 303 is _much_ easier to machine
03:47 PM veegee: 316 great for marine stuff or in very corrosive environments. 303 is fine for everything else
03:50 PM veegee: I really need to build a temperature controlled furnace. Perhaps something that runs on oxy acetylene. Or a combination of propane+air for most of the heat and added oxygen into the air intake when higher temperatures are needed. Don't need as much oxygen:propane ratio as normal oxy propane welding
03:58 PM roycroft: i have an electic furnace for heat treating
03:58 PM roycroft: it can get up to 1200 degrees, which is more than i need
03:59 PM roycroft: i need to replace the analog control with a pid controller, though
03:59 PM roycroft: i just got the last parts for that a couple weeks ago, but then my belt grinder blew up and i got sidetracked
03:59 PM roycroft: i'm going to get back to the heat treating oven today, though
04:03 PM Tom_L: veegee, try inconel some time
04:03 PM XXCoder: inconel is fun!
04:04 PM Loetmichel: veegee: you are aware that adding oxy to a propane/air burner raises the temperature into ranges where NOx is generated?
04:04 PM Tom_L: but unless you're building jet engines etc you probably won't need any
04:05 PM veegee: Loetmichel I vent everything outside
04:05 PM Loetmichel: ok then
04:05 PM Loetmichel: just sayig
04:05 PM roycroft: i'm not sure why you would want to introduce oxygen to your heat treating oven though
04:05 PM veegee: I have a total of 10 high flow blowers venting everything from sand blasting to welding to painting outside
04:06 PM veegee: roycroft not for heat treating purposes, for annealing
04:06 PM roycroft: the rest of the universe do whatever possible to remove oxygen
04:06 PM veegee: for heat treat, I'd argon fill it
04:06 PM roycroft: what would be the benefit to adding oxygen when annealing?
04:06 PM veegee: Or not care because surface scale doesn't bother me
04:07 PM veegee: If I can't get to 950ºC via propane only. But now that I think about it, I should be able to with good insulation
04:07 PM roycroft: my electric oven can get up to 1200 degrees :)
04:07 PM veegee: How big is it?
04:07 PM roycroft: not very big
04:08 PM roycroft: around 200x200x200, i'd guess
04:08 PM veegee: I wouldn't mind going electric at all, but I'm talking about parts that may need a volume of 4x2x2 meters
04:08 PM roycroft: i don't need to heat treat big stuff
04:08 PM veegee: Oh you have a 2x2x2m box too?
04:08 PM roycroft: 200mm x 200mm x 200mm
04:08 PM veegee: LOL
04:09 PM veegee: that's about the size of my hand
04:09 PM roycroft: most heat treating ovens are pretty small in most shops
04:09 PM veegee: yeah for small parts makes sense
04:09 PM roycroft: i primarily use it when making tooling
04:09 PM veegee: But I want to build one for multiple purposes: annealing, heat treating, powder coating, etc.
04:10 PM roycroft: and btw, you should care about scale
04:10 PM veegee: But yeah I guess I can get away with a small high temperature oven and a large one for low temp powder coating
04:10 PM roycroft: if you ever want to harden and temper something, scale is a big deal
04:10 PM veegee: For dimension critical stuff?
04:10 PM roycroft: you can't see if it's tempered properly if it's covered with scale
04:11 PM veegee: Why can't I just grind off the scale?
04:11 PM roycroft: because the part will cool down too much
04:11 PM roycroft: tempering should be done immediately after quenching
04:11 PM roycroft: before the part cools down to below 150 degrees
04:12 PM veegee: Ah, got it
04:12 PM roycroft: if you wait too long you need to spend a bunch of time normalizing the part before tempering, and it still won't be as durable as if you tempered it right away
04:12 PM veegee: I thought you can temper anytime
04:12 PM roycroft: no
04:12 PM veegee: Even crytotreatment works on store-bought drill bits
04:13 PM veegee: But I may be confusing a hardening operation with a softening operation
04:13 PM roycroft: when you quench you build up internal stresses
04:13 PM roycroft: when you temper you release some of those stresses
04:13 PM Tom_L: sounds kinda personal
04:13 PM roycroft: if you let it get too cold before you temper you may suffer some internal microfractures
04:14 PM veegee: Thanks, I'll look into that.
04:14 PM veegee: Do you use oil or water for quenching?
04:14 PM Tom_L: oil is better
04:14 PM roycroft: it depends on what the metal wants
04:14 PM Tom_L: water works though
04:14 PM roycroft: oil is better for tool steel that wants to be quenched in oil
04:14 PM veegee: I ask because 150ºC seems to be better with oil
04:14 PM roycroft: brine is better for tool steel that wants water quenching
04:15 PM veegee: The phase transition of water at 100ºC takes an enormous amount of energy
04:15 PM roycroft: sure, but you don't "water quench" in pure water
04:15 PM roycroft: you water quench in brine, and a fairly strong brine solution
04:15 PM Tom_L: yeah i forgot about the brine thing
04:15 PM Tom_L: shows how often i harden anything
04:15 PM veegee: Ah, got it
04:15 PM roycroft: which raises the boiling point quite a bit
04:16 PM Tom_L: good for making ice cream too :)
04:16 PM roycroft: as far as deformation goes, though air quench < oil quench < water quench
04:16 PM roycroft: but air quenching does not result in as much hardening as oil quenching
04:17 PM roycroft: so if it has to be pretty hard, oil is a good way to go
04:17 PM roycroft: if it has to be really hard, and you don't care about deformation (back hoe forks), water quenching is the way to go
04:18 PM roycroft: although you'll get a lot more failures when water quenching, even when you temper it properly
04:18 PM roycroft: i mostly use oil quenching tool steel, and the reasons should be fairly clear from my discussion above
04:18 PM roycroft: and the oil should be about 65-70 degrees when you quench
04:19 PM roycroft: room temperature oil can cause failures
04:33 PM -!- #linuxcnc mode set to +v by ChanServ
04:57 PM JT-Shop: usps international shipping sucks right now
05:00 PM Tom_L: did it ever not suck?
05:00 PM Tom_L: actually you're right, now it's about 3x what it was when i was shipping stuff
05:01 PM Tom_L: i used to ship a 6x9 padded envelope for ~$3, last one i sent was over 10
05:01 PM CaptHindsight: have the shipping rates from China to USA bumped up much lately?
05:02 PM _unreal_: no idea
05:02 PM CaptHindsight: just about everything I looked at was not in stock in the USA
05:05 PM JT-Shop: up till a few weeks ago it worked ok but they can't get any flights out so packages just sit
05:06 PM JT-Shop: a year or so ago us dropped out of some program that allowed china post to ship cheap
05:06 PM JT-Shop: I have packages just sitting in a container and not moving at all
05:07 PM Tom_L: so after talking with Carl, i ordered a couple more cutters :)
05:07 PM JT-Shop: and then one arrives in Australia after 30 days
05:07 PM JT-Shop: end mills?
05:07 PM Tom_L: yes
05:07 PM JT-Shop: cool
05:07 PM Tom_L: i don't really see how they could be much better than these
05:08 PM Tom_L: i thought these cut very nice
05:08 PM Tom_L: but at least i know i can cut SS with them if need be
05:08 PM * JT-Shop found a 6-50p plug so I can drop power to the center of the big shop and stop tripping over extension cords
05:09 PM Tom_L: good call
05:09 PM JT-Shop: been wanting to do that for a while
05:09 PM Tom_L: just took a few cuss words to get it done
05:09 PM _unreal_: are you fucking kidding?
05:10 PM _unreal_: just a few
05:10 PM Tom_L: well for you it's just your normal vocabulary
05:10 PM _unreal_: shit.....
05:10 PM JT-Shop: I'd have to drag out the 10' ladder to make the run but I have a 100' of 12-4 SO(something) cord to run over there
05:12 PM JT-Shop: so I'll have 3 15a 220v receptacles and a few 120v 20a receptacles and that should cover everything that is usually in the center of the shop
05:12 PM Tom_L: i'm rethinking the setup on a part i did for a guy quite a while back
05:12 PM Tom_L: slower but i think safer to run
05:12 PM JT-Shop: I told my customer to try and get an iges file or something else for that telsa part
05:12 PM Tom_L: why?
05:13 PM Tom_L: iges is ideal yes but i managed to get a workable version
05:13 PM JT-Shop: to see if I can import it without errors
05:13 PM Tom_L: alot of times you have to move a few surfaces back into place
05:13 PM Tom_L: they don't always connect
05:13 PM JT-Shop: well there is several things including the felt part that have to fit in the delrin block
05:14 PM Tom_L: it can't just be hollowed out?
05:14 PM _unreal_: so tonight My goal is to get the POTs mounted in the pendent after I get it jigged up in my cnc. mill out the holes
05:14 PM _unreal_: and get that part DONE finally
05:15 PM JT-Shop: it= the delrin block?
05:15 PM Tom_L: yeah, just cut the rim and hollow out the center of the delrin
05:15 PM _unreal_: but I also have to run to the store with my daughter sigh.
05:15 PM _unreal_: well shower time
05:15 PM Tom_L: that lip looked to be roughly .060" wide on the flat
05:16 PM JT-Shop: the felt part is 10.375" by 15" and has to be positioned on the vent with double stick tape
05:16 PM Tom_L: i take it the felt wasn't in that file
05:17 PM JT-Shop: tolerance is +- 1mm
05:17 PM Tom_L: a visual is always good but i think i get it
05:18 PM JT-Shop: the PI121... part has the felt I think
05:18 PM Tom_L: if you had to profile that part you'd have to ballnose the whole thing
05:18 PM Tom_L: i must have missed that one
05:18 PM JT-Shop: so the place the felt fits has to follow the contour of the top
05:19 PM JT-Shop: a huge PIA at this point
05:19 PM Tom_L: i was wondering if you needed to follow the contour
05:19 PM Tom_L: that makes the price go up considerably
05:19 PM JT-Shop: aye
05:20 PM Tom_L: you could profile it with a flat cutter but it may not be quite as accurate as they want
05:20 PM Tom_L: but it would save time
05:20 PM JT-Shop: If I could just cut it with planer z then the cutter follows the contour of the hollow area in the delrin block
05:21 PM * JT-Shop goes out to the other shop to ponder the center power
05:21 PM Tom_L: i did have to join several surfaces on that outter profile i showed you and that will be true for the rest of them too i bet
05:22 PM Tom_L: onecad did look quite capable of doing it though
05:37 PM * JT-Shop found a chunk of 10-4 so cord plenty long enough to reach the center with 20' left over
05:38 PM * JT-Shop calls it a day
06:09 PM * jthornton wonders who Tom_L was talking to above...
06:09 PM Tom_L: yes
06:09 PM Tom_L: in JT-Shop
06:10 PM Tom_L: i'll paste it to ya
06:10 PM jthornton: ah I see lol
06:10 PM jthornton: it's one of my blocked aholes
06:10 PM XXCoder: i just see jt and tom chatting
06:11 PM XXCoder: unless you mean earlier, then its roy and tom
06:11 PM Tom_L: jthornton, pm
06:11 PM Tom_L: you started asking something in JT-Shop
06:13 PM * jthornton takes his first road trip since 2019
06:13 PM XXCoder: omg
06:13 PM XXCoder: can io join?
06:13 PM XXCoder: I
06:14 PM Tom_L: no you can just wonder
06:14 PM Tom_L: :)
06:14 PM XXCoder: lol
06:14 PM jthornton: going to Cypress Tx for my grandsons graduation party then to Reserve La for a crawfish boil at my brothers house then to Horn Lake Mississippi for the best BBQ in the universe
06:14 PM XXCoder: nice
06:15 PM jthornton: you can meet me at Marshall Tx, going to spend the night there and try to find a shot glass for our riding buddy Don Marshall
06:24 PM jthornton: one of the queens is pissed at me, I caught her pulling breast feathers from Blondie and put her in jail... she won't come near me now lol
06:24 PM jthornton: chow time soon I can hear the wheels turning upstairs
06:36 PM * roycroft is hoping for a camping trip this summer
06:37 PM XXCoder: nice
06:37 PM XXCoder: i havent camped for a decade
06:37 PM XXCoder: or more
06:46 PM roycroft: i usually go on at least one camping trip per summer, not counting the country fair
06:46 PM roycroft: but i had not left the county in over a year until i went up to portland a couple weeks ago
06:46 PM Tom_L: take a compass along
06:47 PM roycroft: i actually know how to use a compass and read a map :)
06:47 PM roycroft: kids these days just use their gps and obediently do what the gps tells them to do
06:47 PM Tom_L: i will say one thing good about covid at least around here
06:47 PM Tom_L: ppl are driving a bit slower now
06:48 PM roycroft: not around here
06:48 PM roycroft: overall traffic is way down compared to pre-pandemic times
06:48 PM roycroft: but fatal accidents are up
06:48 PM roycroft: and the average speed has gone up
06:49 PM roycroft: when people speed and drive crazy i don't call them "accidents"
06:49 PM roycroft: i try not to use that term in general - i prefer "crashes" or "car crashes"
06:49 PM roycroft: most "accidents" are actually negligence
06:50 PM XXCoder: talking about crashes https://twitter.com/bobbienews/status/1394384836815507458?s=19
07:16 PM CaptHindsight: no such things as accidents, define accidents, it's just an excuse for something else
07:26 PM roycroft: well, things like poor reactions to unforseeable freak acts of nature can be considered accidents
07:26 PM roycroft: having a heart attack while driving and losing control of the vehicle can be considered an accident
07:26 PM roycroft: driving while drunk and losing control of the vehcile is in no way an "accident"
07:27 PM roycroft: nor texting while driving
07:27 PM roycroft: reaching back to discipline a child in the back seat while driving
07:27 PM roycroft: applying makeup or shaving while driving
07:27 PM roycroft: actually, some of those things could be considered accidents
07:28 PM roycroft: but not on the part of the driver - on the parents who accidently conceived the driver
07:34 PM veegee: So, wasps are aggressive and I have no issue with killing them
07:35 PM veegee: I caught some alive to do some experiments on them. You know, for science
07:35 PM veegee: Did you know they can actually survive for quite some time, like at least 10 minutes in a vacuum chamber at -0.95 bar?
07:35 PM veegee: Well 0.9 bar
07:36 PM veegee: When I hooked up my vane pump to bring it down to about 5pa absolute pressure, they died of course. Whatever fluid inside them would have nicely bubbled inside their bodies
07:44 PM CaptHindsight: does it also work on rapists?
07:46 PM roycroft: well it appears i need to replace the heating element in my heat treating oven
07:46 PM roycroft: as well, a little of the firebrick has chipped out, so i'll have to get some refractory cement and repair that
07:49 PM roycroft: i wonder if fireplace mortar that comes in a caulk tube would work
07:49 PM roycroft: yeah, the stuff is rated to 1090 degrees
07:50 PM roycroft: and even though my oven can get hotter than that, i won't ever need to heat it beyond that
08:57 PM -!- #linuxcnc mode set to +v by ChanServ
08:58 PM -!- #linuxcnc mode set to +v by ChanServ
10:27 PM -!- #linuxcnc mode set to +v by ChanServ
10:52 PM drdoc: veegee: I understand both terms.
10:54 PM drdoc: Normalizing, in metallurgy, returns an alloy to a homogeneous state, or as close to homogeneous as is possible.
11:03 PM drdoc: carbide inclusions are a nightmare feature of cheap cast iron.
11:04 PM XXCoder: like mystery steel bar heh
11:04 PM XXCoder: i once saw a guy make knife handle out of rebar
11:04 PM XXCoder: you could see drill randomly twitch and change twist
11:05 PM drdoc: rebar, believe it or not, is generally pretty high-quality steel
11:05 PM XXCoder: yeah? seems that guy got really crap scrap rebar
11:06 PM drdoc: recovered rebar may well be crap, I dunno, but the standards for commercial rebar in the US make it a pretty good tool steel
11:06 PM drdoc: very close to 4140 or 4120
11:07 PM XXCoder: might be it, old standards rebar
11:09 PM drdoc: but yeah. I mentioned scrap bed-frame angle iron the other day - I usually grind on it before I try cutting tools on it
11:09 PM drdoc: see what kind of spark it makes
11:09 PM XXCoder: cool :)
11:09 PM drdoc: you can wear out a HSS drill bit on that stull
11:09 PM drdoc: stuff
11:10 PM drdoc: my old blacksmithing teacher had photos of a cast steel motor block - some industrial 4 banger
11:11 PM drdoc: you could see the outline of a 1/2 or 9/16 machine screw in the side
11:13 PM Tom_L: rebar varies by application, ie bridge, home drive, saltwater exposure etc
11:14 PM drdoc: true
11:14 PM XXCoder: interesting
11:16 PM drdoc: Tom_L: if I remember right, it's graded by tensile strength in the US - 40, 70, 90 I think - grade x1000 being the tensile strength
11:17 PM drdoc: I've got rivet punches made from rebar that just never deform
11:17 PM drdoc: and a couple of hammers, come to think of it
11:19 PM drdoc: XXCoder: one nice thing about grade rebar is that you can get a pretty good heat treat with a water quench
11:19 PM drdoc: ...
11:19 PM drdoc: when it doesn't shatter
11:20 PM XXCoder: lol ok :)
11:21 PM drdoc: I lie. It's graded by yield strength
11:22 PM XXCoder: :P liar
11:23 PM -!- #linuxcnc mode set to +v by ChanServ
11:24 PM drdoc: yup
11:24 PM drdoc: I do, however, stand by the "good stuff" claim
11:24 PM XXCoder: https://media.discordapp.net/attachments/750429399140139028/844064044838420550/186549636_318372186342356_410945232957188445_n.png?width=484&height=672
11:24 PM XXCoder: hah
11:24 PM drdoc: I made those hammers 5 years ago and I'm not very nice to them
11:25 PM drdoc: I like that
11:25 PM drdoc: the SP link
11:27 PM drdoc: https://www.facebook.com/doc.shipley.9/
11:27 PM drdoc: that's when it was new; the handle isn't quite that pretty now
11:27 PM drdoc: the other I don't have any photos online
11:28 PM XXCoder: thats cool :)
11:29 PM drdoc: it works a treat
11:29 PM drdoc: the other's a 4lb rounding hammer
11:31 PM drdoc: some of my other stuff
11:31 PM drdoc: https://www.facebook.com/media/set/?set=a.1238420675078&type=3
11:35 PM drdoc: and some old, old stuff
11:35 PM drdoc: http://www.docsdreams.com/Joolery/
11:35 PM XXCoder: those is quite nice
11:36 PM XXCoder: wrought or cast?
11:36 PM drdoc: wrought
11:36 PM XXCoder: nice. lot more work
11:36 PM drdoc: casting silver is cheating
11:37 PM drdoc: I really, really wish I had color photos of that navel pendant
11:37 PM drdoc: in situ, preferably
11:37 PM drdoc: :-)
11:37 PM XXCoder: lol
11:38 PM drdoc: that thing was one of those "accidentally amazing" pieces
11:40 PM drdoc: something about the way the cabs were mounted and the way the ball hung (and maybe the way she moved) made it shine out like a lighthouse