#linuxcnc Logs

Aug 07 2020

#linuxcnc Calendar

01:05 AM Deejay: moin
01:57 AM veek: what's this probe called - both parts
01:57 AM veek: looks like a crocodile clip
02:22 AM jymmmm: alligator clip?
02:22 AM jymmmm: electrical probe?
03:18 AM veek: jymmmm, https://i.imgur.com/QmUFO8h.png
03:19 AM veek: jymmmm, sorry thought i had posted the image
03:19 AM veek: wikipedia's has something similar https://en.wikipedia.org/wiki/Banana_connector
03:20 AM Loetmichel: veek: in germany those are called "alligator clip with 4mm banana plug" or "Hirschmann-klemme" (as the premium manufacturer of those is named)
03:21 AM veek: ah thank you
03:27 AM veek: darn - Jameco's PDF catalogue is NOT searchable - that's so evil
03:31 AM * veek purrs
03:31 AM veek: https://www.allelectronics.com/pdf-catalog
03:55 AM veegee: veek yeah alligator/crocodile clip
03:55 AM veegee: veek that one has a standard 4mm banana plug for attaching to modular test equipment probe cables
03:56 AM veegee: veek https://probemaster.com/oscilloscope-probes/ I get my probes and stuff from these guys, they're very good quality
03:57 AM veegee: veek like these ones: https://probemaster.com/9000-series-modular/
03:57 AM veegee: They're all gold plated, very very flexible cable, well built connectors
04:04 AM Loetmichel: hehe, coworker just came by with a newly built 19" 2U switch enclosure: "thats rocking back and forth, what can i do?" $me took the box, put it diagonally on the corner of the desk, placed hands on the opposite corners, "leaned into it" a bit... no mor rocking... his face: :-O
04:08 AM XXCoder: if it dont fit, hammer it in.
04:08 AM XXCoder: ;)
04:09 AM Loetmichel: hammer would leave dents. hands it is ;)
04:12 AM XXCoder: dents is mark of quality!
04:56 AM JT-Cave: morning
04:57 AM XXCoder: hey jt
05:20 AM Tom_L: morning
05:21 AM XXCoder: hey tom
06:20 AM veek: veegee, thanks
07:47 AM Loetmichel: *MUHAHA* just got a call from a (german) machinist that makes alu parts for us that have to fit in each other. "hey, you have forgotten to mention how much clearance you want to have between the parts" $me: "ZERO" "but that will not fit!" $me:"i have a hammer. I WILL fit" "But but...." i think i have broken his mind ;)
07:51 AM rmu: the infamous hammer fit
08:00 AM TekniQue: You want negative clearance between parts
08:00 AM TekniQue: interference fit
08:02 AM JavaBean: liquid nitrogen on one part, oven for the other
08:02 AM Tom_L: Loetmichel, it's called an interference fit
08:05 AM Loetmichel: Tom_L: no, its called "sewing" aluminium ;)
08:05 AM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=16414&g2_imageViewsIndex=1
08:06 AM Loetmichel: like that just on a different enclosure
08:06 AM Loetmichel: and yes, clearance would mean that the parts seperate again. something we dont want
08:07 AM rmu: tig-tack them together on 3 points. even spotwelding may work.
08:08 AM Loetmichel: i have NO welder here at the company. and i dont see the need to get my private welders to the company.
08:12 AM rmu: getting a work environment properly certified for welding is fun
08:14 AM JavaBean: be glad you aren't in USA. welding is a "protected industry", same as doctor/surgeon
08:15 AM Loetmichel: not that i would particulary care... i am an electronican by profession... what i do here is mostly CAD/CAM/CNC operator
08:16 AM Loetmichel: and yes, i CAN weld (tig, mig, MMA, oxy/acetylene), but i wouldnt call myself a "professional" in that
08:16 AM Loetmichel: i just dont see why i should bring even MORE of my private tools to the company
08:20 AM roycroft: you can lease them to your employer
08:23 AM Loetmichel: i could... but i honestly dont want to
08:24 AM Loetmichel: if boss is to cheap to buy an $500 AC tig welder: ok, not my problem.
08:27 AM rmu: JavaBean: i'm pretty sure it depends what you are welding. if it's just cosmetic stuff like a hole in some sheet metal probably nobody cares. structural or safety critical stuff... that should be done by people that know what they are doing and know applicable code/norm/laws
08:30 AM Loetmichel: rmu: lets say: i dont want to weld a brake caliper on a car that broke off. i have no problems doing electronics enclosures though.
08:31 AM rmu: i would not weld on that either, or pressure vessels
08:37 AM rmu: Loetmichel: is there a reason you don't order that part as just one piece?
08:37 AM Loetmichel: yeah, has to be folded around an existing part of machinery
08:38 AM Loetmichel: before closing the enclosure
08:41 AM Loetmichel: and yes, i DO bend 1,5mm to 3mm sheet alu by hand
08:43 AM JavaBean: i would call you a liar, but you would probably prove me wrong by successfully bending my skull
08:48 AM Loetmichel: nah, i cheat and notch the alu to half thickness where the bends have to be
08:48 AM Loetmichel: https://www.youtube.com/watch?v=PRFFRJ3iQRM
08:49 AM Loetmichel: funny, i am wearing the same shirt today ;)
09:01 AM roycroft: that's not cheating, loetmichel
09:03 AM Loetmichel: is it not?
09:03 AM Loetmichel: what is it then?
09:08 AM rmu: Loetmichel: that looks like you are using tools.
09:10 AM Loetmichel: a steel bar with a 2mm slot in it, yes
09:11 AM Loetmichel: its still "by hand" in my book, i dont use any lever action other than what the shape of the part allows for
09:11 AM Loetmichel: the slotted stell is just there because my fingers cant hold such small screw lips flat when bending
09:12 AM Loetmichel: steel
09:14 AM roycroft: it's just making stuff
09:41 AM rmu: Loetmichel: it is a level
09:41 AM rmu: lever
10:18 AM Loetmichel: rmu: s/lever/mechanical advantage. you know wheat i mean.
10:18 AM Loetmichel: no bending brake or similar
10:40 AM jymmmm: DIN mount DC-DC converters... https://product.tdk.com/en/search/power/switching-power/dc-dc-converter/list#type=DPX&psts%5B%5D=0&_l=20&_p=1&_c=part_no-part_no&_d=0
11:22 AM jymmmm: I'm looking for 1/4" wide alum flat bar, can't find it =(
11:24 AM roycroft: that's pretty narrow
11:25 AM jymmmm: Yeah
11:25 AM JT-Cave: 1/4 x what
11:26 AM jymmmm: JT-Cave: Could be 1/16" thick or even a little less
11:26 AM jymmmm: brass if I have to
11:26 AM roycroft: you might want to cut down some sheet metal
11:26 AM roycroft: if it's that thin
11:28 AM roycroft: get some 1" wide 14ga or 16ga and rip it to width
11:29 AM roycroft: a bit wasteful, but i'm not sure you're going to find it in the size you want
11:29 AM jymmmm: roycroft: It's the "cutting down" I was trying to avoid =)
11:29 AM roycroft: yeah, i get that
11:29 AM roycroft: you could do it neatly on a table saw, but it would be a horrible event
11:30 AM roycroft: we were just discussing how nasty a task that kind of thing is a day or two ago
11:30 AM JT-Shop: mcmaster has 1/4 x 1/16
11:31 AM roycroft: the place i always forget to look for raw metals, and the place that always has the uncommon sizes :)
11:32 AM jymmmm: JT-Shop: do you have a link?
11:32 AM roycroft: https://www.mcmaster.com/9447T31/
11:33 AM roycroft: it's even priced decently
11:34 AM jymmmm: lol, where's the price?
11:34 AM roycroft: right on that page
11:34 AM roycroft: oh, sorry
11:34 AM roycroft: that's the detail page
11:34 AM roycroft: click on a length at the top
11:34 AM roycroft: and the price will display
11:35 AM jymmmm: ah, there we go
11:35 AM roycroft: $5.82 for a 6 foot length
11:35 AM roycroft: shipping will probably be $15 for that
11:35 AM roycroft: but you can probably buy 10 of them and still ship for $15
11:35 AM roycroft: you can figure that out
11:35 AM roycroft: mcmaster don't ever show shipping until you're invoiced though
11:36 AM jymmmm: They couldn't just list all three prices, lol
11:36 AM jymmmm: roycroft: thank you =)
11:36 AM roycroft: that's the one big drawback of their website - it does not calculate shipping
11:36 AM roycroft: and if you're not at the detail page you see all the prices
11:37 AM roycroft: https://www.mcmaster.com/standard-aluminum-sheets/thickness~0-0625inches/width~0-25inches/
11:40 AM JT-Shop: mcmaster.com
11:42 AM jymmmm: Would 4ft sticks be considered "oversized" for shipping purposes?
11:47 AM jymmmm: roycroft: TYVM for finding that, much appreciated
11:48 AM jymmmm: I just hope it's not "sharp right angle" edges
11:56 AM roycroft: it would be easy to ease them if necessary
11:56 AM roycroft: a few seconds with a sanding block
12:00 PM Tom_L: he don't wanna cut it, i doubt he want's to sand it either :)
12:14 PM Deejay: hi
12:20 PM jymmmm: Tom_L: I'm gonna have to cut to length, but less labor is always better
12:20 PM roycroft: easing the edges literally takes seconds
12:21 PM jymmmm: then cleanup, making sure no shavings/swarf remain, etc.
12:23 PM Tom_L: https://www.homedepot.com/p/Husky-Deburring-Tool-80-531-111/304583908
12:24 PM jymmmm: Tom_L: Yep, I got one
12:36 PM roycroft: that won't work well on a small, thin strip of aluminium like that
12:36 PM roycroft: i'd use a sanding block or maybe a 6" second cut file
12:37 PM jymmmm: listing says it's extruded, so I doubt I'll have that sharp edge
03:17 PM CaptHindsight: Open Bionics - where the open is for business
03:17 PM CaptHindsight: https://www.youtube.com/watch?v=kG4eMZqppT4
03:17 PM CaptHindsight: neat arm though
03:25 PM jymmmm: That's cool
03:44 PM Deejay: gn8
03:48 PM berin is now known as _unreal_
03:48 PM _unreal_: sweet just got my "" proper "" psu for my new spindle 36v 10amp, vers the 48v 4amp
03:49 PM _unreal_: also I'm designing a waterblock/dust shoe
03:49 PM _unreal_: at least the the 48v psu the bottom of that spindle gets REALLY hot running full rpm no load
03:49 PM _unreal_: could be the PSU??
03:49 PM _unreal_: but regardless making a water block
03:50 PM veegee: _unreal_ PSU?
03:50 PM _unreal_: anyone know of any nice MICRO radiator/pumps
03:50 PM veegee: you mean VFD?
03:50 PM _unreal_: my spindle BLDC motor calls for a 36bv psu
03:50 PM Tom_L: use a fish pump
03:50 PM veegee: ok so a speed controller
03:50 PM _unreal_: the speed controller can take 20v-50v but the motor calls for 36v
03:51 PM veegee: yeah it's the transistors getting hot would be my guess
03:51 PM _unreal_: 36v 300watt
03:51 PM _unreal_: the speed controller doesnt get hot at all
03:51 PM veegee: get a bigger speed controller or increase the carrier frequency if you can
03:51 PM _unreal_: the spindle gets hot
03:51 PM veegee: grease the bearings
03:51 PM _unreal_: its brand new
03:51 PM _unreal_: could be
03:52 PM veegee: if it's sum-ting-wong brand off of aliexpress, grease the bearings lol
03:52 PM _unreal_: it is an aliexpress
03:52 PM _unreal_: and took 3 months to get here
03:52 PM _unreal_: 3 in 1?
03:52 PM _unreal_: oil
03:52 PM veegee: super lube with teflon
03:52 PM veegee: or just bearing grease
03:53 PM _unreal_: hum
03:53 PM veegee: like lucas xtra heavy duty
03:55 PM veegee: For my motors, I use Mobil Polyrex EM
03:56 PM veegee: the lucas xtra heavy duty has a polyurea thickener as well so it's compatible with polyrex EM
03:57 PM veegee: if it's a water cooled spindle, make sure you're actually pumping water through it
03:58 PM veegee: if you're running it dry, of course it's going to get hot
03:58 PM Tom_L: teflon builds too much
04:01 PM _unreal_: not a fan of I woulod NOT use teflon on a bearing
04:03 PM Tom_L: get a heater core for cooling
04:03 PM Tom_L: salvage
04:04 PM veegee: any computer water cooler radiator
04:04 PM veegee: they come in all sorts of sizes
04:04 PM _unreal_: https://www.aliexpress.com/item/ICROATO-WS55-140-Brushless-300W-Spindle-High-Speed-0-3KW-Air-cool-Spindle-Motor-DC-36V/4000801582283.html?spm=a2g0s.9042311.0.0.26244c4dY6AM2R
04:04 PM Tom_L: https://www.ebay.com/itm/70-800-GPH-Submersible-Pump-Aquarium-Fish-Tank-Pond-Fountain-Water-Hydroponic/223761201253?hash=item341934f865:g:ZpQAAOSwNvBekOeY
04:04 PM _unreal_: that is my spindle
04:04 PM _unreal_: I am thinking about the tinyest pump/radiaotor I can find
04:05 PM Tom_L: pc radiator / pump
04:05 PM _unreal_: this looks good
04:05 PM _unreal_: https://i.pinimg.com/originals/b5/3d/29/b53d29f6a2284ce5de56c651b267532b.jpg
04:06 PM _unreal_: https://i.ytimg.com/vi/wlPrzys_DlY/maxresdefault.jpg
04:06 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/spindle_cooler/Mill3.jpg
04:06 PM Tom_L: call it ghetto but it works like a champ
04:07 PM _unreal_: https://p.globalsources.com/IMAGES/PDT/BIG/215/B1020485215.jpg
04:07 PM Tom_L: with an eheim fish tank pump
04:07 PM jymmmm: Tinest pump? Okey.... https://www.engadget.com/2014-05-21-worlds-smallest-motor-can-pump-drugs-into-cells.html
04:07 PM Tom_L: https://www.amazon.com/Eheim-Universal-Aquarium-Water-317GPH/dp/B0002DGWT8
04:08 PM Tom_L: i just toss the pump in the bucket
04:09 PM Tom_L: magnetic link between impeller/motor
04:09 PM Tom_L: like your washing machine
04:10 PM _unreal_: Thats my bitch right there 50 or 60 mm single https://modmymods.com/radiators.html
04:10 PM _unreal_: now I just need a micro pump
04:14 PM _unreal_: https://modmymods.com/phobya-dc12-220-pump-49095.html
04:14 PM _unreal_: smallest one I have found so far
04:15 PM Tom_L: what voltage?
04:15 PM Tom_L: that might be a concern while shopping
04:15 PM _unreal_: 12
04:16 PM _unreal_: 12v 6watt
04:18 PM _unreal_: I'm thinking I may get those
04:19 PM skunkworks: Think my 8 year old could have done better http://electronicsam.com/images/greenmachine/IMG_20200807_161619.jpg
04:20 PM Tom_L: skunkworks, wtf is that a cookie recipe?
04:20 PM XXCoder: why is there diagram for baseball on it?
04:20 PM Tom_L: skunkworks, did you see my ghetto keyway slot?
04:22 PM skunkworks: Tom_L: no! where?
04:22 PM skunkworks: was trying to wrap my head around adding a radious to the polygon
04:23 PM Tom_L: the left one was a failed attempt on the worn out lathe: http://tom-itx.no-ip.biz:81/~webpage/cnc/rotary/Broach/Test_Keyway3.jpg
04:23 PM Tom_L: and the ghetto setup: http://tom-itx.no-ip.biz:81/~webpage/cnc/rotary/Broach/Test_Keyway6.jpg
04:23 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/rotary/Broach/Test_Keyway7.jpg
04:23 PM Tom_L: just some scrap lathe cutoff i had laying around
04:23 PM skunkworks: we ahve certainly cut a few keyways that way..
04:24 PM XXCoder: does your lathe spindle have positioning? if so it could be interesting
04:24 PM Tom_L: XXCoder, that's my dividing head
04:24 PM Tom_L: on the mill
04:24 PM XXCoder: oh lol ok
04:24 PM XXCoder: thought it was modifications on lathe
04:24 PM Tom_L: clamped the cutter to the z column
04:25 PM Tom_L: i'll make some sort of holder for it one of these days
04:25 PM XXCoder: mill is convient on making that holder ;)
04:33 PM veegee: roycroft https://www.astrotools.com/3-8-mini-impact-ratchet-wrench.html one of my new favourite air ratchets
04:33 PM veegee: VERY fast
04:34 PM veegee: nice "impacting" mechanism for loosening anything short of lug nuts
04:35 PM veegee: You might be used to the 150 RPM ones. My regular air ratchets are all minimum 250 RPM rated but actually slightly faster
04:37 PM _unreal_: so I think I'm going to end up getting those parts that mini radiator and pump. cant find anything cheaper or smaller
04:45 PM _unreal_: wondering what kind of fluid I'll want to use considering my water block will be aluminum
05:07 PM jymmmm: glycol
06:16 PM veegee: skunkworks cut your nails!!!
06:16 PM veegee: they're longer than my ex girlfriend's
06:17 PM Tom_L: pfft
06:17 PM veegee: unless you're a woman, then totally disregard
06:17 PM Tom_L: they make good screwdrivers in a pinch
06:17 PM veegee: they also break and tend to get lifted up off your skin when doing heavy manual work
06:18 PM veegee: and that's super painful
06:18 PM veegee: If that happens to me, I always fix with super glue to reattach it to the skin
06:19 PM veegee: any other way is many days of pain. If water gets in it when washing your hands, damn it'll burn so much
06:22 PM veegee: https://www.amazon.ca/gp/product/B003V9P6RO LOL shame on Ingersoll Rand "feet per pound" what the fuck is that
06:22 PM veegee: for a company that established, simply unacceptable
06:34 PM _unreal_: ok doing a run
06:35 PM _unreal_: test run, just got the new PSU wired in
06:35 PM _unreal_: yep moto is still getting hot at the bottom end
06:35 PM _unreal_: bottom end only
06:35 PM _unreal_: could be a bearing? or just its design?
06:36 PM _unreal_: clearly gets too hot to touch
06:39 PM CaptHindsight: have a pic of the motor? what is in the end of the motor? bottom end = spindle end??
06:41 PM CaptHindsight: is this the spindle? https://www.aliexpress.com/item/4000801582283.html
06:41 PM CaptHindsight: which end is bottom?
06:41 PM CaptHindsight: _unreal_: ^^
06:42 PM _unreal_: https://cdn.discordapp.com/attachments/717411349541683212/740024270285045821/20200803_215147.jpg
06:42 PM _unreal_: https://cdn.discordapp.com/attachments/717411349541683212/738917731151118376/15962420896107010412417595846703.jpg
06:42 PM _unreal_: the bottom round section of the spindle gets hot
06:43 PM _unreal_: the mount and top dont seem to get hot at all
06:43 PM CaptHindsight: i don't know which end is bottom
06:43 PM _unreal_: my new heat-sink/water block dust shoe mount will keep it cool for sure
06:43 PM _unreal_: the tooling end
06:43 PM CaptHindsight: spindle end or fan end?
06:44 PM _unreal_: collet end
06:44 PM CaptHindsight: ah, spindle end
06:45 PM _unreal_: I have so much mass this spindle is going to run nice and cool when everything is setup finally
06:46 PM CaptHindsight: the motor housing on the spindle end looks like aluminum
06:48 PM _unreal_: crap I dont want to but I have to dismount my spindle so I can get my locations for milling the mounting holes
06:49 PM _unreal_: I think you guys will like my design when I post it
07:08 PM jymmmm: Why not --> " CAN'T power your device directly" https://www.amazon.com/Solinba-Inverter-DC11-28v-AC90-130v-System/dp/B01C1EQMZY
07:09 PM Tom_L: jymmmm, maybe too much ripple? i dunno
07:09 PM jymmmm: Tom_L: IDK, they ALL seem to say that though
07:09 PM Tom_L: not a true sine
07:10 PM jymmmm: https://www.amazon.com/Inverter-Stackable-DC10-8-30V-AC90-140V-Output/dp/B071NVS63B/
07:10 PM jymmmm: Yeah, but typcial 12V inverters aren't either
07:11 PM jymmmm: Tom_L: and do you REALLY just plug that into an outlet?
07:11 PM jymmmm: Not legally, but
07:47 PM _unreal_: https://media-cdn.tripadvisor.com/media/photo-s/03/41/27/6e/grand-bahia-principe.jpg
07:47 PM _unreal_: crap
07:47 PM _unreal_: wrong chat
07:51 PM Tom_L: i've got a similar pic
08:28 PM roycroft: i think i'll finish milling all my bench timbers to final dimensions tomorrow morning
08:28 PM roycroft: i'm almost done, but i have to empty the dust collector again, and i want to rotate the inserts on my thicknesser before doing the final passes
08:28 PM roycroft: so i quit for the night
08:29 PM roycroft: i am actually farther along than i expected - i had figured today plus a full day tomorrow before final thicknessing
08:29 PM roycroft: so this is good - i'll be able to start gluing up the laminates tomorrow instead of sunday
09:04 PM flyback: what are you tryin gto do
09:04 PM flyback: with inverters
09:14 PM _unreal_: hehe I'm in florida I have TONS of pics like that