#linuxcnc Logs

Jul 13 2020

#linuxcnc Calendar

02:02 AM Loetmichel: mornin'
02:15 AM Loetmichel: i take whatever is handy, any engine oil works better than nothing ;)
02:16 AM Loetmichel: but IIRC thread cutting oil is vey thick and tacky
02:18 AM Loetmichel: but normal cutting works well with brushed on 15W40 or similar. just remember to clean the part afterwards
02:18 AM Loetmichel: btw: the alcohol/water mixture makes cast iron rust like crazy, so remember to clean your machine ASAP after turning alu
02:27 AM CaptHindsight: some people like lard for tapping aluminum
02:28 AM Loetmichel: CaptHindsight: yeah, i can imagine that working pretty well
02:28 AM Loetmichel: problem is that you have to clean the part afterwards, with the alcohol thin its enough to use a blowgun. MUCH easier
02:28 AM CaptHindsight: sensille: https://smithy.com/machining-reference/drilling/page/21
02:29 AM CaptHindsight: goes in the dishwasher :)
02:29 AM sensille: oh wow
02:29 AM sensille: i guess "soluble oil" is the answer
02:29 AM Loetmichel: yes
02:30 AM Loetmichel: if you dont mind cleaning the part
02:30 AM sensille: the science of oil is completely beyond me
02:30 AM CaptHindsight: most of my parts need cleaning anyway
02:31 AM CaptHindsight: prepping for anodize or coatings or paint
02:33 AM sensille: so what to get as "soluble oil" in germany
02:34 AM Loetmichel: sensille: google "mannol emulsion"
02:34 AM sensille: i tried "Sonax sx90 plus", but it just burns
02:34 AM Loetmichel: aqnd use it pure, without water
02:34 AM Loetmichel: works well for me
02:35 AM sensille: thanks
02:35 AM CaptHindsight: https://www.fuchs.com/de/en/products/product-program/metal-processing-lubricants/cutting-fluids/
02:35 AM Loetmichel: https://www.motor-oel-guenstig.de/schmierstoffe/industrie-gewerbe-schmierstoffe/metallbearbeitungsoele/7015/10-1x10-liter-mannol-emulsion/bohroel-wassermischbar/schneidoel/drehoel
02:35 AM Loetmichel: that stuff
02:36 AM Loetmichel: but i would not buy a 10 liter can for a hobbyist
02:37 AM sensille: those 10l are quite cheap, but i'd really prefer to start with 1l :)
02:37 AM Loetmichel: sensille: the sonax is a penetrating oil, its meant for losening rusted bolts, not for turning steel
02:38 AM Loetmichel: you need an oil that can cling to the surface and has a very high "ölfilm-reissdruck"
02:38 AM sensille: it was listed as accessory for the lathe and the comments said the use it for cutting, so i tried. and failed
02:38 AM Loetmichel: yeah, dosent surprise me
02:39 AM Loetmichel: that stuff is simply to thin to work
02:40 AM sensille: no surprise, the mannol already seems to be the cheapest stuff :)
02:41 AM sensille: but 4l aren't that much cheaper than 10l
02:43 AM Loetmichel: it was probably listed as an accessory because it cleans the ways and such things, not as a cutting oil
02:43 AM Loetmichel: the sonax stuff
02:43 AM Loetmichel: like WD40
02:43 AM sensille: which is used as coolant, too
02:44 AM Loetmichel: and works equally bad
02:44 AM Loetmichel: "slightly better than dry, but only slightly"
02:45 AM sensille: i guess i just go for the 10l
02:45 AM sensille: enough to last a lifetime
02:46 AM Loetmichel: thats what i said when i bought my first 10l of IPA... took me less than 2 months to kill that jerrycan ;)
02:47 AM sensille: maybe this ... https://www.ebay.de/itm/163152409309
02:48 AM Loetmichel: i am always sceptical when stuff claims to be the "jack of all trades"
02:48 AM Loetmichel: but your mileage may vary
02:51 AM sensille: ordered the 10l
05:01 AM JT-Cave: morning
05:09 AM XXCoder: yo
05:29 AM JT-Cave: now web sites want to enable push notifications lol not a chance too much like facebook
05:34 AM jymmmm: JT-Cave: "For your convenience.... Spam Direct"
05:35 AM jymmmm: morning
05:46 AM JT-Cave: hmm something in X11 resets the screen blanking dammit
06:50 AM Tom_L: morning
06:50 AM JT-Cave: morning
06:52 AM XXCoder: good sunrise time everyone
06:57 AM jymmmm: XXCoder: 30minutes AFTER I wakeup, whenever that may be :)
06:57 AM XXCoder: really? even if you wake up at 1 pm it sun will wait 30 additional minues?
07:02 AM Tom_L: 73 currently high 94
07:04 AM jymmmm: XXCoder: Nope, cycle time is still the same, just on MY schedule =)
07:04 AM XXCoder: lol
07:09 AM JT-Cave: 67°F
07:11 AM jymmmm: 74F/93F
07:11 AM XXCoder: 69f peak
08:15 AM perry_j1987: morning
09:02 AM perry_j1987: mmm coffeee
09:35 AM skunkworks: ditto
09:41 AM * SpeedEvil ponders recent TOT on latches.
09:41 AM * SpeedEvil ponders a XY array of latches and a couple motors.
09:52 AM Centurion-Dan2 is now known as Centurion_Dan
12:35 PM jymmmm: The lights are on but nobody's home
12:41 PM miss0r2: it happens
12:42 PM miss0r2: I just got my cobber rails in the mail today, so I can start making the busbars for the AGM batteries
12:48 PM jymmmm: miss0r2: what are you going to use?
02:00 PM miss0r2: jymmmm: some 3x15mm cobber rails
02:00 PM miss0r2: Only plan on using up to 25amps "continously"/for prolonged timed
02:01 PM miss0r2: A quick'n dirty calculation rates the rails at 45amps
02:01 PM Loetmichel: for 25A 3*15mm copper rails is a BIT over the top, dont you think?
02:01 PM miss0r2: I have also added a 100amp fuse inbetween the batteries and another 100amp fuse for the output
02:01 PM Loetmichel: yeah, i would have no problems pumping 100A thru 3*15mm rails
02:02 PM miss0r2: Loetmichel: Sure :] But i don't want it to become too "flimsy"
02:02 PM miss0r2: 3x15mm is just a nice size to use 6mm bolts through
02:03 PM Loetmichel: miss0r2: considering that THAT shunt can cope with 20A: http://www.cyrom.org/palbum/main.php?g2_itemId=9095&g2_imageViewsIndex=1
02:03 PM Loetmichel: and thats just 35um copper on PCB ;)
02:04 PM miss0r2: well, its called a shunt because you can actualy measure the voltage drop across.. :) I don't want to wase precious volts using too thin cobber :D
02:04 PM miss0r2: waste*
02:05 PM miss0r2: https://imgur.com/a/bJ2C9pe
02:05 PM miss0r2: the larger part to the right is a acetal part that will support the fuses/joints. The rest are the copper rails
02:07 PM Loetmichel: yeah, i know. still: the ground band on a normal car is just about 20mm by 2mm braid. and that can support 850 CCA
02:07 PM Loetmichel: and even more
02:07 PM miss0r2: yeah. But honnestly, this is mostly for the structual integrity
02:08 PM miss0r2: I don't like looking at flimsy installations, unregardless of how well they are calculated.
02:27 PM CaptHindsight: starter solenoid contacts are usually the weakest link in the starting system
02:30 PM Loetmichel: yes
02:30 PM * Loetmichel worked on a couple czech Tatra 813 colossus
02:31 PM Loetmichel: those have a V12 with 17.5l displacement (1100 cu.in)... and TWO 30kW starters
02:32 PM Loetmichel: two stater solenoids, each good for 1000A++
02:32 PM CaptHindsight: yeah, they don't make cars like that
02:33 PM Loetmichel: the russian way: the solenoid just pulls a piece of 10*50mm copper rail bent into an U shape onto two similar rail tabs ;)
02:33 PM Loetmichel: similar sized
02:34 PM CaptHindsight: Loetmichel: not sure of the point you are trying to make
02:34 PM CaptHindsight: some trucks have high current starters
02:35 PM Loetmichel: point was: a bit of copper can carry surprisingly heavy currents
02:35 PM CaptHindsight: russians make starters with U shaped copper bars?
02:35 PM Loetmichel: not starters, starter "solenoids"
02:35 PM CaptHindsight: oh, copper is a good conductor
02:35 PM Loetmichel: just an electromagnet that pulls said u shaped copper bar in
02:36 PM CaptHindsight: good to know
02:36 PM Loetmichel: ont two ends of the same copper bar
02:36 PM Loetmichel: easily repairable though
02:36 PM CaptHindsight: copper is a good conductor
02:36 PM Loetmichel: we had one fail
02:37 PM Loetmichel: dismantle, file new "teeth" on the U-part, file the burn marks out of the copper contacts on the bottom end, assemble: works
02:37 PM CaptHindsight: some people are anti-aluminum wire
02:37 PM CaptHindsight: metal snobs
02:37 PM CaptHindsight: yet still too cheap for silver
02:37 PM Loetmichel: and those engines were nearly indestructible
02:38 PM Loetmichel: we had a piston seizure on one because of overheat.
02:38 PM gregcnc: dang those antialuminiumiumiumites
02:38 PM Loetmichel: waited on the side of the highway until the engine was cold again. Pressed one starter: *CLACK*, nothing happens. so the driver pressed both buttons...
02:39 PM Loetmichel: *CLACK* *CRACK* and the engine spun to life on 11 cylinders
02:39 PM Loetmichel: lower bearing cap on the conrod of the sized piston ripped off ;)
02:40 PM Loetmichel: we drove home, changed the whole cylinder and piston and conrod: works like a charm again
02:40 PM JavaBean: and the piston wasn't launched into the crankshaft?
02:40 PM roycroft: i think i'm not a big fan of machining brass
02:40 PM Loetmichel: didnt even need to undo the oil plan, enough clearance to fish all the broken parts out of the pan from above once the cylinder was removed ;)
02:40 PM roycroft: which is sad, because i really like the metal
02:40 PM roycroft: but it's so bloody grabby
02:41 PM roycroft: perhaps if i had proper tooling for it things would go better
02:41 PM Loetmichel: javabean: the conrod broke bcause the piston was seized inside the cylinder
02:41 PM Loetmichel: how could it possibly launch?
02:42 PM JavaBean: didn't the combustion cycle contine in that cyclinder?
02:42 PM Loetmichel: and to be honest: missing one cylinder of 11 isnt realy a deal
02:42 PM Loetmichel: JavaBean: diesel. how could it if the piston isnt moving any more?
02:42 PM roycroft: should i take an end mill and dump it in a vibratory tumbler for a while? :)
02:43 PM Loetmichel: no compression no ignition
02:43 PM CaptHindsight: 5 of six pretty lumpy, 3 of 4 kinda rough, 1 of 2 really bad
02:43 PM JavaBean: because the intake/exhaust values and if gas spark would continue even if the piston didn't move
02:44 PM Loetmichel: yes it would. IF it were gas
02:44 PM Loetmichel: but probably not ignite either because of no gas change
02:44 PM CaptHindsight: the piston just ended up in the lucky spot
02:44 PM Loetmichel: there would not be much gas goint INTO the cylinder if the piston isnt moving
02:45 PM CaptHindsight: not too close to the valves and not too close to the crank
02:45 PM Loetmichel: CaptHindsight: right
02:45 PM gregcnc: what actually broke in that case that didn't cause catastrophic engine damage?
02:45 PM Loetmichel: but even if it destroyed the valves: we had half a dozen spare heads
02:45 PM CaptHindsight: and the connecting rod broke in a spot where it didn't whack the block to hell
02:45 PM gregcnc: yeah
02:46 PM CaptHindsight: was the engine made by Cat?
02:46 PM Loetmichel: gregcnc: the lower conrod bnearing cap broke, and the conrod fell down (V12) so it didnt interfere with the crankshaft any more
02:47 PM Loetmichel: the conrod itself was fine, just the bolts/cap broke off the lower end
02:47 PM Rab: My homies had an old 4cyl Volvo turbo blow a hole through the piston (gas engine). They opened the oil pan (no easy task in the snow), took off the rod cap, shoved the piston up, disconnected the plug and injector, and got where they needed to go, barely.
02:48 PM Rab: There might have been a coat hangar or something holding the rod up.
02:48 PM CaptHindsight: the fun of working under a car in the cold
02:48 PM Rab: CaptHindsight, this was in Chicago.
02:49 PM Rab: They had a lot of "fun" in the snow.
02:49 PM CaptHindsight: my transmissions or clutches would always go when it was under 20F
02:49 PM CaptHindsight: sometimes I'd wait for the temp to be over 10-15F to have a warm day to fix it
02:50 PM CaptHindsight: teenager with free - $20 cars
02:50 PM Loetmichel: hehe
02:50 PM CaptHindsight: rev to 5-6K rpm and then pop clutch at every light was likely the problem :)
02:50 PM Loetmichel: i know. i drive $3000 BMWs ;)
02:51 PM Loetmichel: but two of them so i have a backup if one fails ;)
02:51 PM Loetmichel: but i am way to lazy to do the repairs myself these days.
02:52 PM Loetmichel: have a good cheap mechanic that is always excited to see me... "SIE schon wieder?" :-)
02:52 PM Loetmichel: ("YOU again?")
02:53 PM CaptHindsight: now it's just oil and tuneups and the every few year rebuild
02:57 PM CaptHindsight: like miss0r2 the local mechanics would have very little experience with our vehicles and likely get it wrong
02:58 PM CaptHindsight: or just change parts until it works and charge you for all of it
02:58 PM miss0r2: what? Hey!
03:02 PM CaptHindsight: gregcnc: how many million would your engine swap of cost?
03:02 PM CaptHindsight: of/have
03:02 PM gregcnc: 1200 in labor by an independent
03:03 PM gregcnc: not including stuff i replaced on the donor
03:03 PM CaptHindsight: is that the day rate or 1.5 days?
03:03 PM gregcnc: i think it was 1.5
03:24 PM jymmmm: Ok, just tested my inverter, OVP right at 16V, damn
03:25 PM gregcnc: what did the specs say?
03:26 PM jymmmm: IT says 16V, but I was hoping for 16.8V
03:27 PM jymmmm: It's so damn hard to find an inverter that will run on LiPo voltages
03:28 PM CaptHindsight: mehbe we can modify the inverter to OVP @ 16.8
03:29 PM CaptHindsight: mehbe by changing a resistor value
03:29 PM jymmmm: I thought of that, but do you think we would fry something else too?
03:29 PM CaptHindsight: jymmmm: have you opened the inverter yet? Are part numbers visible?
03:29 PM jymmmm: CaptHindsight: Reopening it now
03:30 PM gregcnc: I can't believe Li compatible inverters are not common today
03:30 PM CaptHindsight: if so please post a CLEAR high res pic of the board
03:30 PM jymmmm: gregcnc: I found ONE quality one
03:31 PM CaptHindsight: clear does not mean motion blur for dramatic effect
03:31 PM CaptHindsight: with enough contrast to see part numbers and traces
03:32 PM CaptHindsight: so lights on, flash at the proper angle
03:32 PM CaptHindsight: it's nice when they post a close up of the part label on ebay and all you see is a white blur
03:35 PM perry_j1987: man i need some of that tool organizer foam
03:40 PM jymmmm: Eeeesh, have to unsolder to take it apart :(
03:42 PM CaptHindsight: frustrating
03:42 PM CaptHindsight: jymmmm: no adjustment pots anywhere?
03:42 PM gregcnc: it seems your four cell setup is odd
03:43 PM CaptHindsight: don't muck with them until you know what they do if so
03:44 PM CaptHindsight: gregcnc: tradition be damned
03:44 PM gregcnc: wide range power supplies cost more
03:44 PM jymmmm: I have some bullet connectors, easier than un/resoldering
03:44 PM perry_j1987: should i bother entertaining the idea of getting a fadal 4020
03:45 PM Tom_L: new?
03:45 PM perry_j1987: early 90s
03:45 PM gregcnc: very common for getting in
03:45 PM Tom_L: they're ok
03:45 PM Tom_L: on the 'cheap' end of the spectrum
03:45 PM perry_j1987: over 10,000 lb esh
03:45 PM CaptHindsight: https://www.ebay.com/itm/FADAL-VMC4020-VERTICAL-MACHINING-CENTER/402140811843
03:46 PM CaptHindsight: perry_j1987: how much space and power do you have?
03:47 PM perry_j1987: in the process of shopping for a new shop
03:48 PM CaptHindsight: 2 complete and working Matsuura 500's for $2400 or best for both
03:49 PM perry_j1987: you have?
03:49 PM CaptHindsight: might not see a deal like this until later this year when more shops go under
03:50 PM CaptHindsight: has 2x https://www.ebay.com/itm/1981-MATSUURA-MC-500V-CNC-with-YASNAC-3000G-control/283531831618
03:50 PM CaptHindsight: Franklin Park
03:52 PM Rab: They'd have to be paying me $1200 to look at that red all day...
03:53 PM CaptHindsight: Rab: how much for yellow or green? :0
03:54 PM Rab: CaptHindsight, if you're doing it right, maybe the machine covers itself in green? ;)
03:56 PM Tom_L: purposeful, you can't see the blood spatters that way
04:00 PM CaptHindsight: Favorite CNC Machine Color Poll: White, 'cause it shows all the dirt
04:00 PM Tom_L: CaptHindsight, what industry do most of the shops up there run parts for?
04:01 PM CaptHindsight: Tom_L: automotive, aerospace/mil, energy
04:02 PM CaptHindsight: in order of mosts
04:02 PM Tom_L: auto still #1 up there?
04:02 PM Tom_L: yeah
04:02 PM CaptHindsight: not sure how much tool and die there is anymore
04:03 PM jymmmm: CaptHindsight: No trimmers at all, did find this chip... https://www.mouser.com/datasheet/2/149/KA3525A-1010657.pdf
04:03 PM CaptHindsight: to west in Rockford it was automation
04:05 PM CaptHindsight: and machine tools
04:06 PM CaptHindsight: what I mostly see is niche shops with connections to local industry or whats left of it
04:06 PM CaptHindsight: one does mil spec fasteners, another nuclear industry, another >90% is Snap On turning
04:07 PM CaptHindsight: the big machine makers all have sales floors around here, but limited manufacturing
04:08 PM gregcnc: place my father was working at was shut down for a week. laid off several before that
04:08 PM perry_j1987: back .. bad internet out here
04:09 PM perry_j1987: so you think those near 40 yearold matsuura's are still useable?
04:09 PM jymmmm: CaptHindsight: https://i.imgur.com/zTLhIPQ.jpg
04:09 PM CaptHindsight: mine is from 1980
04:09 PM miss0r2: depends what you think 'usable' covers :)
04:10 PM CaptHindsight: jymmmm: oh it looks like single layer PCB and all through hole
04:10 PM jymmmm: yeah
04:10 PM CaptHindsight: I see 3 IC's
04:11 PM CaptHindsight: all the same?
04:11 PM jymmmm: no
04:11 PM perry_j1987: still running original controls or did you convert it to linuxcnc
04:11 PM jymmmm: trying to ident
04:11 PM CaptHindsight: LCNC
04:11 PM perry_j1987: servos or steppers on those things
04:12 PM CaptHindsight: DC servo
04:12 PM CaptHindsight: mine is a bigger one
04:12 PM perry_j1987: what kind of work did you have to do to get it going
04:12 PM CaptHindsight: https://imagebin.ca/v/2RuHAsYVLA7N
04:12 PM jymmmm: CaptHindsight: No trimmers at all, did find this chip... https://www.mouser.com/datasheet/2/149/KA3525A-1010657.pdf
04:12 PM CaptHindsight: skunkworks: has a 500 like the ones on ebay
04:13 PM CaptHindsight: perry_j1987: skunkworks did a complete LCNC swap with encoder on the spindle for rigid tapping
04:13 PM CaptHindsight: ask him for pics
04:14 PM perry_j1987: k
04:14 PM CaptHindsight: might still be on the LCNC wiki
04:14 PM CaptHindsight: if I knew that I was staying I'd get the 500's
04:14 PM CaptHindsight: but i want to get out of this crazy place
04:15 PM gregcnc: the biggest disadvantage with old iron is limited program memory
04:18 PM perry_j1987: so guaranteed swap to LCNC then for any of the older ones
04:18 PM CaptHindsight: I can LCNC anything
04:18 PM gregcnc: depends if you need it
04:19 PM CaptHindsight: hair drier, barber chair, toothbrush, pancake flipper etc
04:20 PM Tom_L: CaptHindsight, and go where?
04:22 PM CaptHindsight: https://www.ebay.com/itm/Dyna-Myte-DM2400-CNC-Vertical-Milling-Machine/283105438092
04:22 PM jymmmm: CaptHindsight: other chip has been sanded odd
04:23 PM CaptHindsight: Tom_L: likely somewhere in the EU
04:23 PM jymmmm: off*
04:23 PM gregcnc: https://www.ebay.com/itm/133420815899
04:24 PM CaptHindsight: Tom_L: somewhere where they are actually trying to move forward
04:24 PM CaptHindsight: Tom_L: it's not happening here in my lifetime, unless I live to >100
04:25 PM jymmmm: CaptHindsight: you will live to 10000
04:26 PM Tom_L: china seems to be growing by leaps and bounds
04:26 PM CaptHindsight: willing to help any country trying
04:26 PM Tom_L: too bad you can't breath over there
04:26 PM CaptHindsight: they were, till they turned nuts
04:26 PM CaptHindsight: ruining HK and hope not Taiwan next
04:27 PM CaptHindsight: I worker on and off in China until a few years ago
04:28 PM CaptHindsight: waited to see if they would still go back to their old routines and they did
04:30 PM andypugh: CaptHindsight: How’s your Chinese?
04:31 PM CaptHindsight: andypugh: not good, my daughter was the fluent one
04:31 PM jymmmm: 谢谢
04:32 PM andypugh: I wonder how many from Hong Kong will decide to come to the UK?
04:32 PM CaptHindsight: jymmmm: that I have down like the locals
04:32 PM CaptHindsight: andypugh: will the UK take them?
04:33 PM andypugh: If they have the “overseas passport” then they have announced that they will.
04:33 PM CaptHindsight: they are not like the mainland Chinese
04:34 PM CaptHindsight: if trump is still in power next year I think they will move on taiwan
04:36 PM andypugh: https://www.bbc.co.uk/news/uk-52900700?intlink_from_url=https://www.bbc.co.uk/news/topics/cv36p34nzr4t/british-citizenship&link_location=live-reporting-story
04:38 PM CaptHindsight: andypugh: how will the conservative in the UK react?
04:39 PM andypugh: If Boris Johnson is in favour (who is about as right-wing as anyone in UK politics) then I would imagine there will be broad support.
04:39 PM CaptHindsight: most are beyond reason here
04:40 PM andypugh: The left will see it as himane, the right will see it as our colonial duty.
04:40 PM CaptHindsight: good for them
04:45 PM CaptHindsight: gregcnc: who has thermostat type wire but rated for 300V local?
04:45 PM jymmmm: CaptHindsight: https://cdn.datasheetspdf.com/pdf-down/E/M/7/EM78P176N-ELANMicroelectronics.pdf
04:45 PM CaptHindsight: added some mini-splits that run the indoor units at 208V
04:46 PM CaptHindsight: the blowers are 208V and <2A
04:46 PM gregcnc: like 20awg?
04:46 PM CaptHindsight: yeah
04:46 PM CaptHindsight: i think thermostat wiring is 150V
04:46 PM jymmmm: I thought like 24v
04:46 PM CaptHindsight: s, the control isgnals are but the wire rating is higher
04:47 PM CaptHindsight: isgnals/signals
04:47 PM jymmmm: Mine look like CAT3 wire -shrug-
04:47 PM jymmmm: CaptHindsight: Well, that's the 3 chips
04:48 PM Tom_L: plenum is 300v
04:48 PM Tom_L: 18ga
04:48 PM jymmmm: 18ga solid?
04:48 PM CaptHindsight: the runs are 15ft and 30 ft
04:48 PM Tom_L: normal is 150v 18 or 20ga
04:48 PM jymmmm: why 150V for 24V signal?
04:49 PM Tom_L: just because
04:49 PM CaptHindsight: I have miles of MTW at 300V min
04:49 PM CaptHindsight: rather not run conduit
04:49 PM gregcnc: no idea, never had a need for that I usually go to steiner or northwest
04:50 PM jymmmm: Eh, just run CAT5 and be done with it
04:50 PM CaptHindsight: 3 conductors per head, 208Vac and a signal wire
04:53 PM CaptHindsight: 4 with ground, but there is copper for refrigerant, but can't be used as grounds yet are so you get an instant loop
05:11 PM Tom_L: ok, rpi working again
05:17 PM Tom_L: anyone recall the ini section to limit tool table columns?
05:17 PM Tom_L: found it
05:18 PM Tom_L: [DISPLAY]
05:32 PM perry_j1987: gah the shop beer fridge is hitting me again today haha
05:32 PM perry_j1987: havnt gotten anywork done yet
05:32 PM perry_j1987: just taking calls; answering questions and keeping cool with frosty beer
05:32 PM perry_j1987: tough life here
06:19 PM CaptHindsight: jymmmm: back, I see they have a microcontroller in there
06:20 PM CaptHindsight: that complicates things
06:20 PM CaptHindsight: I'd have to see how they detect the input voltage level
06:39 PM gregcnc: jymmmm if you charge to 4V you'd be doing you batteries a favor and be able to run the inverter
07:02 PM veegee: I need to come up with a VFD design that steps up to 600V without a transformer
07:02 PM veegee: essentially a transformerless step up inverter
07:03 PM veegee: 240V to 600V is < 1:3 ratio, should be doable in a single stage without too much efficiency loss
07:04 PM SpeedEvil: Flying cap
07:14 PM jymmmm: CaptHindsight: Yeah, I noticed that too
07:14 PM jymmmm: gregcnc: Even at 4v, still the OVP kicks in
07:16 PM veegee: The amount of money I've spent on knipex boggles my mind
07:18 PM veegee: but those cobra and pliers wrench stuff is just beautiful
07:19 PM veegee: zero backlash parallel jaws, it's what everyone wants in pliers
07:24 PM Tom_L: kinda makes ya not wanna use em ehh?
07:33 PM jymmmm: CaptHindsight: I think I found something https://www.youtube.com/watch?v=eHqh5braM5k
07:46 PM gregcnc: too much coffee
07:48 PM Tom_L: JT-Cave, thanks again for all your docs
07:48 PM Tom_L: building 2.8 on the rpi again
07:49 PM Tom_L: the img file i save that had it was bad so i backed up one and punt
07:50 PM likevinyl is now known as Guest74187
07:50 PM jymmmm: gregcnc: You had too much coffee? Eat an orange (seriously)
07:50 PM gregcnc: that dude in teh video, holy shit
07:51 PM jymmmm: gregcnc: oh, heh, too fast?
07:51 PM gregcnc: I thought somehow I had 2x on from the last one i watched
07:52 PM jymmmm: gregcnc: Near the end, he briefly shows that he had already converted a HF inverter to LiPo
07:53 PM jymmmm: gregcnc: So I guess I just have to locate the resistor divider and/or zener, then maybe change the caps from 16V to 25V
07:54 PM gregcnc: yeah i was going to suggest a voltage divider somewhere if you want to cheat
07:55 PM jymmmm: gregcnc: Yeah, jsut shift the LVD and the OVD
07:55 PM jymmmm: gregcnc: In the comments/iinks he talks about how to poke around the circuitry
07:59 PM gregcnc: my choice would be 7S and 24V inverters, seems pretty common
07:59 PM gregcnc: but I was pretty sure I saw Li compatible when I was looking for inverter chargers
08:00 PM jymmmm: gregcnc: I read that too. I ordered a 4S 60A BMS from china, and I don't want to just waste it
08:38 PM veegee: Tom_L I use them all the time. Very good quality steel, hardness as specified. They don't dent and deform like cheapo chinese steel pliers
08:39 PM Tom_L: yeah i've got a few good tools i know the feeling
08:41 PM Tom_L: ok 2.8.0~pre1 rebuilt and running on the pi again
08:58 PM Connor: andypugh: Got the Collet closer working for the lathe. The cam mech wasn't sliding.. Was seized up. Had to press it off, clean it up and oil it.
08:59 PM Connor: To to figure out how to dial in the run out on the back of the spindle that it mates with.
09:00 PM Connor: and maybe open up the cover so I can take it on/off without having to remove the spline.
09:08 PM veegee: Pipe threads seem to engage significantly better after blasting with crushed glass and wire brush
09:08 PM veegee: Also, not sure why crushed glass is considered "not reusable". Feels like I can reuse it just fine.
09:08 PM Tom_L: use it for foot scrubber
09:09 PM Tom_L: knocks the crest off the threads
09:10 PM Tom_L: hope you cleaned the pipe out
11:04 PM Tom_itx is now known as Tom_L
11:48 PM veegee: It leaves a weird finish initially though, kind of a matte/sparkly metallic finish
11:48 PM veegee: After scrubbing with a wire brush, it leaves the original metal's finish
11:49 PM veegee: Not sure if the sparkly bits are just tiny pieces of the crushed glass stuck to the metal