#linuxcnc Logs

Jul 18 2022

#linuxcnc Calendar

01:36 AM XXCoder: anyone know of small scale inline air blower?
01:45 AM jpa-: XXCoder: there are RC ducted fans, perhaps they could be installed in a pipe?
01:45 AM XXCoder: got link of example?
01:48 AM XXCoder: https://www.ebay.com/itm/263345307062?hash=item3d509a7db6:g:y2gAAOSweRVe8gWo
01:48 AM XXCoder: very cheap
01:49 AM XXCoder: hmm dunno
01:50 AM XXCoder: https://www.ebay.com/itm/363849721644?hash=item54b722272c:g:kQAAAOSwPBRijQYV quite a bit better
01:51 AM XXCoder: saved link for now. thanks for ideas
02:46 AM jpa-: XXCoder: i've tried the first one, it is very weak
02:46 AM XXCoder: that was what I was thinking. thanks for confirm. latter looks stronger
04:39 AM JT-Cave: morning
04:39 AM XXCoder: yo
04:42 AM Tom_L: morning
05:15 AM travis_farmer: Good Morning all :) expecting heat, and lots of humidity today.
07:34 AM * JT-Cave thinks icon view is the stupidest thing he has ever seen... wtf 10,000 icons who can know what they mean
07:34 AM JT-Cave: they just waste space and eat electrons
09:05 AM Guest82: HI Question :? are there SHA256 numbers for the Downloads http://www.linuxcnc.org/downloads/   available
09:05 AM Guest82: 2GB shout be proved bevor getting installed
09:18 AM jpa-: Guest82: http://linuxcnc.org/docs/html/getting-started/getting-linuxcnc.html#_verify_the_image
09:18 AM Guest82: thank you
09:20 AM Guest82: yes i got it right 94a6dc7ef12fbdc0bafd9259ce36797a8b3410ad22e73c4ab57b8e937a924e1a
09:23 AM Guest82: Is this Person from the Forom also here in Channel -> andypugh
09:23 AM JT-Shop: he is probably working
09:24 AM Guest82: Thank you im on to get this done https://forum.linuxcnc.org/41-guis/26550-lathe-macros?start=240#247195
09:26 AM Guest82: Im installing Now
09:35 AM Tom_L: sounds like JT-Cave is having an iconic morning
09:35 AM travis_farmer: lol
09:36 AM JT-Shop: he is already up here
09:36 AM Tom_L: headin to mow before it gets any hotter
09:36 AM XXCoder: good morning
09:38 AM Guest82: I'am quite new to this System and it seams to me that the Forom is bilding up in Line
09:38 AM JT-Shop: too wet to mow here
09:38 AM Guest82: so someone New in a tread does not get answers right ahead
09:39 AM Guest82: as on Lathe Macros is there a howto
09:39 AM JT-Shop: I'm guessing that English is not your native language?
09:39 AM Guest82: no German at 104°F here
09:40 AM JT-Shop: ouch that's hot
09:40 AM JT-Shop: I assume you're talking about Andy's lathe macros???
09:40 AM Guest82: Yes Sir
09:41 AM JT-Shop: sorry never looked at them, I use Ngcgui for my lathe
09:41 AM JT-Shop: https://gnipsel.com/shop/hardinge/hardinge.xhtml
09:42 AM Guest82: Question: do i see the ZIP files only if i #am locked in to the Forum
09:44 AM JT-Shop: by #am locked do you mean logged in to the forum?
09:45 AM Guest82: Basic machines as Your ngc and Mr- Andy Macro shout be in the latest Version
09:45 AM JT-Shop: ngcgui is part of linuxcnc
09:46 AM Guest82: i Know
09:46 AM JT-Shop: http://linuxcnc.org/docs/stable/html/gui/ngcgui.html
09:49 AM Guest82: system is up and running
09:49 AM Guest82: 25min to install
09:49 AM Guest82: Do i need to run a update as of the ISO install
09:50 AM JT-Shop: lunch time here then work time
09:50 AM JT-Shop: sudo apt update
09:50 AM JT-Shop: sudo apt dist-upgrade
09:50 AM JT-Shop: sudo apt auto-remove
09:50 AM JT-Shop: sudo apt clean
09:50 AM JT-Shop: lunch
09:54 AM Guest82: thank you
10:48 AM Tom_L: too wet to mow here too but it's done.
10:49 AM Tom_L: nice sharp hi-vac blade and we're done
12:05 PM * Tom_L finishes a sammich
12:06 PM roycroft: my friends at gst3d still have not repsonded to the defective product dispute, nor have they issued the promised refund on the cancelled order
12:06 PM roycroft: the good news is that citi just told me that if they do not respond by the deadline the provisional credits become permanent
12:07 PM roycroft: and that should they claim all is good i have an opportunity to appeal
12:07 PM Tom_L: i've had my card settle 2 of recent and both went rather smooth
12:07 PM * roycroft has a feeling that he's going to have to find a way to dispose of 9kg of filament-like substences
12:07 PM roycroft: substances
12:08 PM roycroft: i've never had a vendor not respond promptly to a dispute before
12:08 PM Tom_L: injection mold
12:08 PM roycroft: i've been looking for a place to recycle pla but have not found one
12:08 PM roycroft: not locally
12:08 PM roycroft: and i'm not going to pay shipping to recycle it
12:09 PM roycroft: i think i'm going to bring this up with my county's waste management folks
12:09 PM Tom_L: they won't take it?
12:09 PM roycroft: with so much 3d printing happening these days, and with pla being compostable, it might be feasible to set up a pla recycling program
12:09 PM roycroft: just as landfill for now
12:10 PM Tom_L: we have a hazardous waste site we can take things to either recycle or dispose of
12:10 PM roycroft: but if they had the right kind of recycling plant they could compost it
12:10 PM Tom_L: free
12:10 PM roycroft: we do too
12:10 PM roycroft: but pla is not hazardous
12:10 PM Tom_L: is latex paint?
12:10 PM Tom_L: they take that
12:10 PM roycroft: yes
12:10 PM Tom_L: mm
12:10 PM roycroft: the interesting thing about paint is this
12:11 PM Tom_L: wet vs dry
12:11 PM roycroft: if i have a paint can with a tiny amount of paint left in it i can take it to any store that sells paint and they will recycle it for free
12:11 PM roycroft: if the can is completely empty it has to go to the landfill
12:12 PM Tom_L: you didn't like my nut driven ballscrew idea?
12:12 PM Tom_L: :/
12:12 PM roycroft: i could collect empty paint cans, wait until i have a partial can that is ready to be recycled, and pour a small amount of paint from the partial can into the empties, then recycle them all
12:12 PM roycroft: i do like that idea
12:12 PM roycroft: but it's a bit uncommon
12:12 PM roycroft: which is not in and of itself bad
12:13 PM roycroft: but i think that i'd rather stick with more conventional methods on this router
12:13 PM Tom_L: most long travel tables either use a large screw, rack or belts
12:13 PM roycroft: i'm working on a rack and pinion design, and i'm pretty sure at this point that is what i'll use
12:13 PM Tom_L: iirc the screw on my bud's machine is like 3"
12:13 PM roycroft: i got some .step files from avidcnc
12:14 PM roycroft: their product might work well for me, but the footprint is a bit large and awkward for my application
12:14 PM roycroft: i'm debating between just buying their stuff and consuming more real estate and doing my own, more compact design
12:15 PM roycroft: https://www.avidcnc.com/pro-rack-and-pinion-drive-nema-23-p-227.html
12:15 PM roycroft: that would be pretty easy to drop in
12:15 PM roycroft: and it's not that expensive
12:16 PM roguish[m]: roycroft: what are you thinking of using the rack and pinion for?
12:17 PM roguish[m]: i've used 'em before
12:17 PM roycroft: $656.50 for two of those pinion drives, and four 1m racks
12:17 PM Tom_L: 190 steps per inch isn't that much
12:17 PM roycroft: y axis on a moving gantry cnc router
12:17 PM roguish[m]: will the work for the accuracy you want?
12:18 PM roycroft: roguish: this is a preliminary rendering that's over 6 months old - things have changed a lot since then
12:18 PM roycroft: https://roycroft.us/CNC-Router/Full-Assembly-Preliminary-2.jpeg
12:18 PM roycroft: but it gives a rough idea of the type of machine i'm building
12:19 PM roguish[m]: racks are good. i used them on a gantry system, 220' x 76'
12:19 PM Tom_L: mine are roughly 1000/inch
12:19 PM roycroft: i think the avid stuff would be accurate enough, but i'm not certain at this point
12:20 PM roycroft: iirc there's a 3:1 reduction from the motor to the pinion
12:20 PM roycroft: and i can do microstepping
12:20 PM roguish[m]: but I didn't need high res. was happy for +-1/4 inch
12:20 PM roycroft: i'd like to hold 0.005"
12:20 PM roguish[m]: it's the slop in the rack to pinion fit.
12:20 PM roycroft: yes
12:21 PM roycroft: i'm looking at a spring-loaded pinion, so there would always be direct contact
12:21 PM roycroft: that should help eliminate slop/backlash
12:21 PM roycroft: but at the end of the day it's only going to be as accurate as the rack and pinion teeth are
12:22 PM Tom_L: mount the rack on the bottom so crap doesn't tend to settle on it
12:22 PM roycroft: yes, that's a real concern
12:22 PM roguish[m]: that helps. that is what i did. i actually used an alum 1/4" plate as the spring
12:22 PM roycroft: if i do the rack and pinion system i might even mount the rack on the bottom on the insides of the extrusions
12:22 PM Tom_L: that was one nice feature of the belt. it was covered by another belt
12:24 PM roycroft: and i will want the motor mount plate to be inline with the y axis, so it's not sticking out the side
12:24 PM roycroft: if i could tuck all of that on the insides of the extrusions that would be great
12:24 PM roycroft: it would both conserve space and keep the mechanism clean
12:29 PM roguish[m]: check this out. go to 1:22 in the video and see the overhead gantry. I design it. https://www.youtube.com/watch?v=OCFEYvqXDus
12:31 PM roycroft: that's pretty cool
12:31 PM roycroft: quite large, indeed
12:32 PM roycroft: i like the way the workers float around in cocoons to do their thing
12:33 PM roguish[m]: 220' long. 76' wide, the gantry is 8'x8'x76' alum box tube. both x and y drives are rack and pinion
12:34 PM roguish[m]: yeah, ther're in hangglider bags. it's called 'pizza man'
01:12 PM mrec: is there a shortcut available for axis to show up the touch off window?
01:12 PM mrec: I don't want to use the mouse all the time
01:13 PM CaptHindsight[m]: roguish[m]: how fast can it fling workers around?
01:16 PM roguish[m]: it's not too fast. probably 10 to 15 inch per sec. I once took John Thomson (Thomson Bearings) for a ride and pushed it to 1m / sec. FUCKING SCARRY.
01:16 PM roguish[m]: he was a pretty cool guy.
01:17 PM CaptHindsight[m]: Sailmaker - The Ride
01:17 PM roguish[m]: the 2 Swiss guys that invented the process are living comfortably. they licensed the process to North Sails that was owned by Terry Kolher (kohler sinks and toilets.)
01:18 PM roycroft: it looks like fun
01:18 PM roguish[m]: I actaully worked for Terry Kolher.
01:18 PM CaptHindsight[m]: roguish[m]: which process?
01:18 PM roguish[m]: watch a couple of the videos.
01:18 PM CaptHindsight[m]: which part?
01:19 PM roguish[m]: the actual single piece, laminate sail. with fiber reinforcements.
01:20 PM roguish[m]: previously all sails were cut from flat fabric and stitched together.
01:21 PM roguish[m]: lots of extra weight.
01:21 PM CaptHindsight[m]: oh the laminator
01:22 PM roguish[m]: the laminate sails were only about 30% as heavy. think about the overall boat balance. keel vs. weight aloft
01:22 PM CaptHindsight[m]: yeah they would probably issue patent for that
01:22 PM roguish[m]: oh yeah
01:23 PM roguish[m]: I had like a blank check to design and build
01:23 PM roguish[m]: project of a lifetime
01:23 PM CaptHindsight[m]: I would have charged them $1B
01:23 PM CaptHindsight[m]: and they would have said "it's no longer blank"
01:24 PM roguish[m]: i was hired to go from a small proto type in a warehouse to a full production facility.
01:24 PM CaptHindsight[m]: simple but big
01:25 PM roguish[m]: the company chose Nevada. in 1 year, purchased property, built builing40000sqft. , installed machine and made sails.
01:25 PM roguish[m]: we were installing the ways before the building had windows.....
01:26 PM CaptHindsight[m]: do they also make blades for windmills and wings for aircraft?
01:26 PM mrec: [end] key is the shortcut for touch off got it
01:27 PM mrec: damn ... it would be nice if axis would have an option undo touch off
01:27 PM roguish[m]: in Cal, you can't get a permit in a year
01:27 PM roguish[m]: capt_hindsight[m]: just yacht sails
01:27 PM CaptHindsight[m]: or just sail fabrication?
01:29 PM roguish[m]: the machine has been running over 25 years. i'm sure it's had some changes, but still basically the same.
01:31 PM roguish[m]: capt_hindsight[m]: it's the one thing that i feel i can actually brag about.
01:32 PM CaptHindsight[m]: 25 years old, so likely no Chinese bearings, motors and gears
01:33 PM roguish[m]: NONE
01:43 PM mrec: does anyone know how I can get the G54 offsets in python?
02:13 PM TurBoss: mrec: hello
02:13 PM mrec: hi
02:13 PM TurBoss: you can use ths g5x_offset from here https://www.linuxcnc.org/docs/devel/html/config/python-interface.html
02:14 PM mrec: https://i.snipboard.io/u2WCO9.jpg
02:14 PM mrec: I guess somewhere inside there
02:14 PM mrec: yes
02:14 PM mrec: I will add some undo functionality to axis another time
02:14 PM mrec: although thanks!
02:14 PM TurBoss: 🙂
02:15 PM mrec: it happened too often that I messed up the touch-off and I always figure it out directly after the button press
02:15 PM TurBoss: ouch
02:16 PM mrec: often = over the last 2 years ... my first lot of smd feeders is too inaccurate so I need to touch off 20 pieces and rework some small part
02:19 PM CaptHindsight[m]: mrec: what keeps the PNP in alignment?
02:43 PM Guest52: Hi I Did install the New system on my Lathe CNC Today as of the Help here
02:44 PM Guest52: is Andypugh of the Forum also Here in the CHAT
02:45 PM roycroft: folks, i'm looking for an extrusion that i'm having trouble finding
02:45 PM roycroft: it would be similar to this:
02:45 PM Guest52: in the Forum there are 8 Cycles in the macro
02:45 PM roycroft: https://roycroft.us/Extrusion.jpeg
02:45 PM roycroft: note that it's l-shaped, and the short leg has t-slots
02:45 PM roycroft: guest52: andypugh is here upon occasion
02:46 PM Guest52: Thank you the Simulation Lathe only got 6 Cycles
02:46 PM roycroft: if anyone has an idea who might make such an extrusion i'd appreciate hearing it
02:48 PM Guest52: roycroft the image showes a plain steelbar in your hand
02:48 PM roycroft: that's not my hand
02:48 PM roycroft: and the machine and the shim (what you call the plain steel bar) are not the items of interest
02:48 PM roycroft: look at the fence on either side of the machine
02:49 PM Guest52: FESTO Tool Slides in Germany are the most used
02:49 PM roycroft: i'm sorry that i don't have a better picture of what i'm looking for, but you should be able to extrapolate from what i posted
02:50 PM CaptHindsight[m]: looks like a custom extrusion
02:50 PM roycroft: i don't think festo/festool make the types of extrusions i'm looking for
02:50 PM CaptHindsight[m]: or you can make one with angle and a square t-slot
02:50 PM roycroft: i doubt that, capthindsight
02:51 PM roycroft: that jig is a niche item, brand new to market, and likely made in rather small quantity
02:51 PM roycroft: a custom extrusion would cost a tremendous amount of money for tooling
02:51 PM mrec: CaptHindsight[m]: what do you mean?
02:51 PM CaptHindsight[m]: ok
02:51 PM Guest52: roycroft Festool 491498
02:51 PM roycroft: and yes, i could make something with standard rectangular extrusions and brackets
02:51 PM Guest52: at amazon
02:52 PM roycroft: 491498 is a track for their track saws
02:52 PM roycroft: that does not even remotely resemble the extrusion in the picture i posted
02:52 PM roycroft: but thanks for playing :)
02:53 PM roycroft: it is an extrusion, and it is made of aluminium
02:53 PM roycroft: but that's all it has in common with what i'm searching for
02:54 PM CaptHindsight[m]: Guest52: if you look closer on the bottom right of that pic it does look like two pieces, the festo part and a regular square t-slot frame
02:56 PM CaptHindsight[m]: reminds me of Jymmm
02:58 PM CaptHindsight[m]: did he ever resurface
02:58 PM roycroft: jymmm hasn't been around in a long time
02:58 PM roycroft: i hope he survived the fires ok
02:58 PM Guest52: roycroft i dont know the english word but look maybe on
02:59 PM Guest52: the images here https://www.google.de/search?q=alu+anschlagprofil&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjU_oWsnIP5AhVDXfEDHQ2dAG0Q_AUoAnoECAEQBA&biw=1280&bih=830&dpr=1
02:59 PM CaptHindsight[m]: aluminum extrusion profiles
03:00 PM Guest52: in German its "Anschlagprofil"
03:01 PM Guest52: you can have this alo with a Meserment inlay
03:02 PM roycroft: i ordered some small plastic parts from the tool nut
03:03 PM roycroft: six items in total
03:03 PM roycroft: the total price was <$50, with free shipping
03:03 PM roycroft: they just sent me six different ups tracking numbers for the shipments
03:03 PM roycroft: and they sent me a $20 coupon for being a "loyal customer"
03:03 PM * roycroft wonders how much money they just lost
03:04 PM roycroft: hint: the parts are festool spare parts
03:04 PM roycroft: so essentially zero margin
03:04 PM roycroft: all six items could easily have fit in a small box
03:05 PM CaptHindsight[m]: tooling for extrusions are low cost, they just EDM some tool steel
03:06 PM Guest52: here is an example https://www.ebay.de/itm/373735945986
03:07 PM roycroft: kein versand nach usa
03:07 PM roycroft: that would otherwise work
03:08 PM Guest52: roycroft there are simular in the USA
03:08 PM * roycroft moves to germany so he can build his jig properly
03:09 PM Guest52: roycroft powertec USA
03:11 PM roycroft: there is some kreg l-shaped miter track that might do
03:18 PM roycroft: eek
03:18 PM roycroft: it's $85
03:18 PM roycroft: i only want to spend half that much
03:18 PM Guest52: https://www.amazon.com/stores/page/E54B087F-E469-41F3-95EF-15AA583C318F/search?ingress=2&visitId=27385d55-77f0-4c0f-8afc-d5089027de0d&ref_=ast_bln&terms=t-slot
03:20 PM Guest52: Aluminium Profile Fence 75mm Height With T-tracks And Sliding Bracke
03:20 PM Guest52: thats the way to search
03:21 PM Tom_L: https://www.ebay.com/itm/353789838614
03:21 PM Guest52: https://www.ebay.com/sch/i.html?_from=R40&_nkw=Aluminium+Profil+Fence&_sacat=0&LH_TitleDesc=0&LH_PrefLoc=2&_sop=15
03:22 PM Guest52: Can someone give me a Ideas where this macros are
03:23 PM Tom_L: what macros?
03:24 PM Guest52: https://forum.linuxcnc.org/41-guis/26550-lathe-macros?start=240#247195
03:25 PM Tom_L: for the various machining ops?
03:25 PM roycroft: thanks for the links, folks
03:25 PM roycroft: i can figure out what to do now
03:26 PM Guest52: Tom_L im missing Drill and groove
03:26 PM CaptHindsight[m]: https://www.ebay.com/itm/353926275888 this one has a ruler on it
03:27 PM roycroft: i just got six emails from ups telling me to get ready for my package, and asking if i'm excited about getting it
03:27 PM Guest52: Rather than attach a zip file, I think it makes sense to grab the up-to-date version from the LinuxCNC repository.
03:27 PM CaptHindsight[m]: https://eagle-aluminum.com/architectural-aluminum-trim/
03:28 PM roycroft: i'd be more excited if the vendor were not wasteful and would just put everything in one box
03:28 PM Guest52: Tom_L i did update to the latest from the install
03:32 PM Tom_L: dunno
03:33 PM Guest52: Question isent there a unZIP from the ISO as it does not open a Zip
03:34 PM Tom_L: winrar opens it
03:34 PM Tom_L: not sure about linux
03:37 PM roycroft: apt -y install unzip
03:42 PM JT-Shop: the file manager in linux should have a context menu Extract Here
03:44 PM Guest52: sudo apt-get install file-roller  DID the JOB
03:44 PM Guest52: the Linuxcnc iso doest have this
03:47 PM Guest52: Tom_L where is this LinuxCNC repository
03:47 PM Guest52: may i fint there groove.ngc
03:53 PM Guest52: I need to close for today CAN someone please tell mr.Andphugh to be so kind o update the ZIP File !
03:53 PM JT-Shop: ask him on the forum
03:54 PM Guest52: its a very old post so i guess he will not be informed
03:54 PM Guest52: ok till then
03:54 PM JT-Shop: if that's what you assume...
04:14 PM MikeM[m]: So you guys may get a kick out of this... On Routerforums.com someone today posted in the CNC section that he was having trouble remembering to turn on the controller for his XCarve and was wanting to know if there was a programmatic way to determine the steppers have power. Here is why this is an issue for him. He has a custom setup that the CNC is being controlled by a headless RPI via GRBL. He turns everything on walks into another
04:14 PM MikeM[m]: room to a workstation that is remoted into said RPI to start the GCODE. I told him the correct solution to his problem is to attach a keyboard, mouse, and monitor to his RPI. Would be a LOT cheaper than the broken bits, ruined work pieces, and potential house fire that he is risking.
04:18 PM roycroft: i don't know that attaching a display and keyboard to the rpi is necessary
04:18 PM roycroft: he could use vnc
04:18 PM roycroft: which is what i intend to do
04:18 PM roycroft: however, i shall vnc from a laptop that is right next to the machine
04:19 PM roycroft: not from the next room
04:19 PM MikeM[m]: And that is exactly my point.
04:19 PM MikeM[m]: He didn't see the problem with that.
04:20 PM roycroft: a few years ago i built a brewing control system for my homebrew operations
04:20 PM roycroft: i designed it such that i have to insert a key and turn it to power up the system
04:21 PM roycroft: but as well, i designed it so that it will not power up unless all the pumps, electronic valves, and heating elements are in a known state
04:22 PM roycroft: so it's impossible to power it up with, say, an empty hot liquor tank whose heating element is on
04:23 PM roycroft: https://roycroft.us/BrewSystem/IMG_1012.JPG
04:23 PM roycroft: that's the original control panel i built
04:23 PM MikeM[m]: That is awesome!
04:23 PM roycroft: every switch must be in the off position or the panel will not power up
04:24 PM MikeM[m]: Sounds like a really great setup!
04:24 PM roycroft: it's a safe setup
04:24 PM MikeM[m]: Agreed
04:24 PM roycroft: the panel has 50amps of 240v power going through it
04:24 PM roycroft: and brewing involves a lot of sugar water, which is rather conductive
04:25 PM roycroft: anyway, that kind of failsafe is essential, imo
04:25 PM roycroft: and i'm designing my cnc router control panel similarly
04:25 PM MikeM[m]: Yeah, safety would be prime concern. Between shock hazards and fire hazards, you want it as safe as possible!
04:25 PM roycroft: not to mention one generally enjoys a refreshing beverage or two during the brewing process
04:26 PM roycroft: so there are potential operator error situations
04:26 PM MikeM[m]: no doubt
04:26 PM roycroft: and actually, the example i gave above is not possible
04:26 PM roycroft: because as an additional safety feature i have a float valve in the hot liquor tank that will kill power to the heating element if the liquid level is too low
04:27 PM MikeM[m]: Good planning
04:28 PM roycroft: the overall point is that safety is the most important thing
04:28 PM MikeM[m]: agreed
04:28 PM roycroft: and one of the biggest safety measures one can take is designing the machine so that it always powers up in a known state
04:29 PM roycroft: the only bigger safety measure is to ensure that the machine never powers up on its own
04:29 PM roycroft: i.e. when power is restored after a power failure
04:29 PM roycroft: and if you're going to monitor the machine from another room (not recommended, but it happens)
04:30 PM MikeM[m]: Yeah, that is very good point
04:30 PM Loetmichel_: roycroft: it can power up, but only in "standbymode"
04:30 PM roycroft: you need a kill switch in the other room that is hard-wired to the machine
04:30 PM Loetmichel_: aka: electrnics booting but hydraulics/mechanics still powerless
04:30 PM roycroft: sure, if by "standby" you mean the control computer can power up, but the power supply to all the motion control elements does not
04:30 PM Loetmichel_: yep
04:30 PM roycroft: that's fine
04:31 PM roycroft: anything that makes anything move or get hot/cold or squirt stuff should not be powered up automatically
04:31 PM Loetmichel_: and thats also why big CNC machines have mechanical springloaded brakes on the Z axis
04:32 PM Loetmichel_: so it cant hit the operator when the power suddenly vanishes
04:42 PM roycroft: that's one thing i have not designed into my router
04:42 PM roycroft: but it's a small machine, and i'm pretty sure the stepper motor will keep the spindle from dropping
04:42 PM roycroft: i do intend to do a test of that before i finish building the machine, though
04:42 PM roycroft: and if i see the spindle drifting down when power is removed i'll have to design some kind of brake mechanism
04:42 PM Loetmichel_: roycroft: usually the "rastmoment" of the steppers is big enough
04:42 PM roycroft: i think it will be fine
04:42 PM Loetmichel_: unless you have a really heavy z axis or a really steep ballscrew TPI
04:42 PM Loetmichel_: what the english word for that though?
04:42 PM roycroft: especially since i'll be doing a 2:1 or 3:1 gear reduction from the motor to the spindle screw
04:42 PM Loetmichel_: cogging torque?
04:48 PM JT-Shop: on my plasma the acme screw on Z keeps it from moving when no power is applied
04:49 PM roycroft: i'd have less concern about an acme screw than a ball screw
04:49 PM roycroft: but i have a ball screw for my z axis
04:50 PM JT-Shop2: that will drift down
04:51 PM Loetmichel_: ballscrews have basically no "stick torque" and will drift down unless the steppers have more holding torque than the weight of the axis induces.
04:51 PM Loetmichel_: been there seen that
04:51 PM roycroft: yup
04:56 PM roycroft: i already have all the motion components for my z axis, so i'm unlikely to want to change any of that
05:01 PM JT-Shop: now you just need the unmotion part of z
05:04 PM Tom_L: that guy that did up that brewer control pannel must be some kind of woodworker or such
05:04 PM Tom_L: :)
05:12 PM * JT-Shop watches chicken tv for a bit before retiring for the day
05:13 PM Tom_L: foghorn leghorn?
05:14 PM JT-Shop: he died, and he was my favorite rooster that would come visit me with his entourage in tow
05:15 PM Tom_L: heh
05:15 PM JT-Shop: VLC will play one rtsp stream with great clarity, I need to figure out how to do 6 that way
05:17 PM JT-Shop: sounds like a rewarding programming puzzle to me
05:18 PM Tom_L: could be
05:19 PM JT-Shop: better than staring off into space with your morning coffee
05:20 PM Tom_L: depends if you have a 2 & 4yr old chattering in the background :)
05:20 PM Tom_L: they're actually gone for a few days
05:21 PM Tom_L: but the 2yr old is up in no quiet way before the crack of dawn
05:22 PM JT-Shop: yikes, that could be distracting for a bit... here hold this wire while I pull on this rope :)
05:25 PM Tom_L: that would only work once
05:31 PM JT-Shop: LOL
07:01 PM -!- #linuxcnc mode set to +v by ChanServ
09:35 PM XXCoder: roycroft: thats awesome control panel
09:48 PM roycroft: thanks
09:48 PM roycroft: it's worked well for me over the years
09:50 PM XXCoder: mn im so tired
09:50 PM XXCoder: 6 hours of essentally nonstop vision wobbling while driving
09:50 PM roycroft: i got a good start on making an outfeed table for my bandsaw today
09:51 PM XXCoder: thats good. well done design that lasts forever and functions for years
09:51 PM * roycroft tries to do things well
09:53 PM roycroft: my cat is so sad
09:54 PM roycroft: she has a massive flea outbreak
09:54 PM roycroft: i have flea medicine on order, but it will not arrive for another couple days
09:55 PM XXCoder: ouch. one of those drops that lasts a month?
09:56 PM roycroft: she is an indoor cat, and generally does not get any fleas, but a couple weeks go she dashed through the door when was going outside and had an adventure
09:56 PM roycroft: now she's paying the price
09:56 PM roycroft: yes, the drops that i apply to the back of her neck (where she cannot reach)
09:56 PM roycroft: when i was going outside, rather
09:57 PM roycroft: adventures come with a cost
09:57 PM XXCoder: ok
10:31 PM CaptHindsight[m]: https://www.purina.co.uk/sites/default/files/2021-02/CAT%20HERO_0026_Sphynx.jpg flea resistant cat
10:35 PM XXCoder: dunno if completely resistant
10:42 PM CaptHindsight[m]: ever examine a live flea under a microscope?
10:43 PM roycroft: this cat is immune to fleas: https://www.cat.com/en_US/products/new/equipment/dozers/large-dozers/15969853.html
10:44 PM XXCoder: only has fleas if a cat enters that cat
10:44 PM roycroft: it still won't have fleas
10:44 PM roycroft: the fleas will stay with the cat, not the cat
10:44 PM XXCoder: unless jump off from cat to human in cat
10:45 PM XXCoder: then cat leaves the cat and leaves human with few fleas'