#garfield Logs

Nov 28 2020

01:49 AM rue_shop1: is there a triangle of "you can only have two" between parts count, cost, and size of a circuit?
03:22 AM rue_shop2: http://zpostbox.ru/how_to_determine_permeability_of_unknown_cores_online_calculator.html
10:46 AM Tom_L: rue_mohr, what did your cart get up to?
11:26 AM rue_mohr: cart?
11:28 AM Tom_L: hey I'v just learned that hunting for things on aliepxress and adding them to a cart is all the fun of shopping
11:33 AM rue_mohr: ooh, sorry waking up
11:34 AM rue_mohr: about 9 or 10 items
11:49 AM rue_mohr: polprog, aircore, BLECK
11:49 AM polprog: no, noaircore
11:49 AM polprog: ive pulled nice lum
11:49 AM rue_mohr: video board?
11:49 AM polprog: yes
11:49 AM polprog: not the modulator
11:49 AM rue_mohr: not the RF board then...
11:49 AM rue_mohr: k
11:49 AM polprog: yeah
11:50 AM rue_mohr: so, that joule thief circuit preffers to have a saturating core
11:50 AM rue_mohr: but for power storage, you dont want that
11:52 AM rue_mohr: so, I wonder if I can use one of the smps chips for a cheaper converter
11:52 AM rue_mohr: the UC384x series are pretty cheap
11:55 AM rue_mohr: MC34063 are even only $5/100
11:57 AM rue_mohr: hey wait
11:57 AM rue_mohr: the timing cap waveform from the 34063 looks like its constant current...
11:57 AM rue_mohr: oh, but only 0.8V p-p
11:58 AM rue_mohr: dare I try a dc coupled transistor amp?
11:59 AM rue_mohr: gain of 4.3 atleast
12:06 PM polprog: hmm
12:06 PM polprog: what are you doing?
12:06 PM polprog: im trying to set up codewarrior for these hc12 micros
12:07 PM polprog: archive.org has the install disks imaged, i love it
12:07 PM polprog: i think ill have to set up windows xp
12:12 PM Tom_L: go with 7 if you have it
12:16 PM polprog: not sure what the codewarrior needs, i have 7 installed on one PC
12:19 PM Tom_L: should be ok
12:19 PM Tom_L: it comes in 32 and 64 bit under the same license
12:20 PM polprog: what comes?
12:20 PM Tom_L: 7
12:23 PM aandrew: hm, mx3 or grbl
12:29 PM Tom_L: never heard of mx3
12:29 PM Tom_L: hm, grbl or lcnc
12:43 PM rue_mohr: arg, I cant do that, the ramp isn't at the right freq
12:43 PM rue_mohr: the hc12 utils should be dos
12:44 PM rue_mohr: huh
12:45 PM polprog: "FILES ARE LOCAL TO A COMPUTER AND PERSIST ACROSS USER ACCOUNTS FOR A VM. Every time before logging out, save your files elsewere and DELETE THE LOCAL COPY. Looking at other students' files that may be left on the VM is a violation of course policy. "
12:45 PM * polprog laughs a little
12:47 PM rue_mohr: I had all the orig hc12 dev software around here somewhere once
12:48 PM polprog: i think i have codewarrior 5.1 and a "specia" version from the homepage for this lab course i found
12:55 PM polprog: http://course.ece.cmu.edu/~ece348/
12:55 PM polprog: xp doesnt detect teh sata hdd, grrr
12:58 PM rue_mohr: did you install the driver for it? :)
12:58 PM polprog: no, i dont have it
12:58 PM polprog: i have an sp3 cd with sata drivers
01:00 PM aandrew: Tom_L: mach3 is apparently pretty popular
01:00 PM aandrew: (that is mx3)
01:01 PM aandrew: mach3 is windows only, where grbl is linux/osx too
01:03 PM rue_mohr: getting tempted to try this soic thing where I put multiple chips on an overly-large generic adapter
01:03 PM rue_mohr: this design signs me up to wind 188 inductors
01:03 PM aandrew: rue_mohr: what's your CNC controlled by?
01:03 PM rue_mohr: not sure how I feel on that yet
01:03 PM Tom_L: aandrew, it is until they realize what it lacks
01:04 PM Tom_L: i'm sure it's fine for alot of ppl
01:04 PM rue_mohr: aandrew, I have a custom python app ->grbl->drivers->hardware
01:04 PM aandrew: Tom_L: "what it lacks" - that's the ind of info I'm trying to figure out
01:04 PM rue_mohr: it works for what I do, but somehow toms files mess up the spooler app
01:05 PM Tom_L: synchronous moves, rigid tapping for a couple. i don't know mach so i'm not sure but others in channel have commented on it
01:05 PM Tom_L: mach4 was a fail
01:06 PM Tom_L: rue_mohr, have we figured out what causes it?
01:06 PM aandrew: ah yes that's that thing you were talking about earlier this week
01:06 PM rue_mohr: wish I'd persued my own software when I started in '95
01:06 PM rue_mohr: Tom_L, I think we did, but I forgot
01:06 PM rue_mohr: I think somehow, some of your lines give two ok's
01:06 PM Tom_L: it ok's when it shouldn't
01:06 PM Tom_L: but i forgot on what
01:07 PM Tom_L: i think we even tried without line numbers
01:07 PM rue_mohr: yea, It came down to me completely rewriting the handshaking
01:08 PM rue_mohr: and thats frustrating cause grbl's in-stream status info is a PAIN to parse out
01:27 PM polprog: no sata drivers on windows taht installed fine
01:27 PM polprog: ffs
01:28 PM polprog: now it doesnt boot
01:31 PM polprog: bios doesnt have an option to run the sata controller in ide mode
01:31 PM polprog: it doesnt have any option other than to disable the controller
01:33 PM aandrew: yeah, got the grbl one off amazon. saiinsmart cancelled my order because it was not US
01:35 PM rue_shop1: get one from ali
01:35 PM rue_shop1: they dont care
01:35 PM rue_shop1: or, yo ugot one
01:36 PM rue_shop1: polprog, adapter or on-board?
01:36 PM polprog: onboard
01:36 PM rue_shop1: use a chineese adapter?
01:36 PM polprog: hmm, i dont have one
01:36 PM polprog: i dont have one that way (ide->sata)
01:36 PM rue_shop1: they are bidriectional eh?
01:36 PM polprog: i only have sata->idea
01:36 PM polprog: no
01:36 PM rue_shop1: depending on what connectors you use, they will go either way
01:37 PM polprog: yeah but i doubt they work both ways
01:37 PM rue_shop1: the chineese ones do
01:37 PM polprog: screw this, ill wait for CW to download
01:37 PM polprog: huh
01:37 PM polprog: .. and set up cw on the win 7 PC
01:37 PM rue_shop1: I was like WTF but realized they use the ata adapter you use to work out the direction for the pata end
01:38 PM polprog: hmm. all i have are mIDE anyway
01:38 PM polprog: where are my chinese fpga led driver boards
01:39 PM polprog: what a piece of garbagie bios, courtesy of IVM
01:39 PM polprog: IBM*
01:39 PM Tom_L: in the chinese fpga led driver board drawer
01:39 PM polprog: its a surepos
01:40 PM polprog: it has an ide port though
01:40 PM polprog: screw that, i have an ide disk with XP on it
01:41 PM polprog: hitachi deathstar though
01:41 PM rue_shop1: OH
01:41 PM Tom_L: i had one of those
01:41 PM rue_shop1: I thought only ubm made those
01:41 PM rue_shop1: ibm
01:41 PM rue_shop1: if its a deathstar, I wouldn't trust it father than I could drop it
01:41 PM polprog: the ics on the controller pcb are ibm
01:42 PM polprog: yeahhh
01:42 PM rue_shop1: 0.2nF
01:42 PM rue_shop1: is.... 200pf...
01:42 PM polprog: in metric, yes
01:44 PM polprog: im tired
01:44 PM polprog: im fighting this forever
01:44 PM polprog: well
01:44 PM polprog: this surepos, im trying to get any windows running on it
01:44 PM polprog: my head hurts
01:44 PM polprog: not gonna put that deathstar in it
01:45 PM Tom_L: rue_mohr, i got one in the drawer if you want it
01:45 PM Tom_L: it was working right before it died
01:46 PM rue_shop1: heh no, I had way to many
01:46 PM rue_shop1: I had 15 from a raid array
01:46 PM rue_shop1: they sure dont live long
01:47 PM aandrew: rue_shop1: trying to find a similar deal on ali, I can always cancel the amazon one
01:51 PM rue_shop1: I'd go with the amazon, it'll show up WAY faster
01:51 PM rue_shop1: usually
01:53 PM aandrew: yeah, these all have couriers (DHL or fedex)
01:53 PM aandrew: something like https://www.aliexpress.com/item/32904997444.html
01:54 PM aandrew: no end stops though
02:00 PM aandrew: I read that the 3020s are also a fair bit sturdier
02:01 PM aandrew: I think I might end up with significant duties/tax as well from ali
03:02 PM rue_shop1: you do not need end stops
03:02 PM rue_shop1: set up your zero on the material in a place you know is in the machines range
03:31 PM rue_mohr: nope 34063 is a fail
03:51 PM aandrew: Good point on end stops, just figured it’d be a good option if the gcode told the mill to move to Manhattan
03:52 PM rue_mohr: I did that on my orig machine, waiting for it to go to zero and then abck tow here you want it a pain
03:54 PM Tom_L: it might run out of screw before it got there :)
03:56 PM aandrew: rue_mohr: this is supposed to have both home and end stops
03:56 PM aandrew: So I guess both ends of range
03:56 PM rue_mohr: I think a pendant is much more important
03:57 PM aandrew: The only thing I’m not thrilled about is the plastic Z (spindle holder) but that can be upgraded if I want to get slightly more serious about aluminum
03:57 PM Tom_L: agree on the pendant
03:57 PM aandrew: I think most of my work will be plastic bits
03:57 PM rue_mohr: aandrew, the plastic wont be an issue
03:57 PM Tom_L: does grbl allow for soft limits?
03:57 PM rue_mohr: yes
03:58 PM rue_mohr: they are defaulted to unreasonable nubers
03:58 PM aandrew: This has a pendant type of thing
03:58 PM Tom_L: heh
03:58 PM Tom_L: i have soft limits set but also have switches
03:58 PM rue_mohr: aandrew, wireless/usb/serial?
03:58 PM rue_mohr: I have hit the stops on the machines a few times, but I was manually jogging it
03:58 PM aandrew: I figure a 3018 is a pretty basic, low end thing anyway. 60W spindle (10krpm)
03:59 PM aandrew: rue_mohr: usb
03:59 PM rue_mohr: ok, not wireless = good
03:59 PM rue_mohr: if its descent there will be NO latency
03:59 PM aandrew: Yes this is what i figured
04:00 PM rue_mohr: my pendant actually captures the step-direction between grbl and the drivers
04:01 PM aandrew: I’m still wondering why am isochronous USB controller for LinuxCNC don’t exist yet, it’s a no brainer
04:01 PM rue_mohr: ok, a guy is wrapping up his shop for good, and I'm being forwarded the gas welding gear
04:01 PM aandrew: Nice. Hand me downs are the best way to grow your own shop IMO
04:01 PM rue_mohr: my shop has a lot of it
04:02 PM rue_mohr: the ideas are what I enjoy most
04:02 PM rue_mohr: things like using milk bottles for resistor stock
04:02 PM aandrew: Mine too. Other than a scope and the 3D printer and some soldering gear it’s all used
04:02 PM rue_mohr: those cartons are form like 1980
04:02 PM aandrew: Hm?
04:02 PM rue_mohr: I was really amazed at the crossover between how I did my shop and how one of the electronics guys did his
04:03 PM rue_mohr: aandrew, did you notice the old milk cartons on the shelf by the door of the shop?
04:03 PM rue_mohr: on the bookcase
04:03 PM aandrew: No. Pics?
04:03 PM rue_mohr: in a bit
04:03 PM rue_mohr: I have to get dressed and go do stuff
04:03 PM aandrew: I like the idea of baby food jars with the lids screwed to wood for small stuff storage
04:04 PM rue_mohr: that transistor circuit for the power converter works better than the smps chip I tried this morning
04:04 PM rue_mohr: :)
04:04 PM aandrew: When I had babies I was saving them all for that
04:04 PM rue_mohr: its all good till you find yourself having to use industrial mayo jars
04:04 PM aandrew: I don’t have the jars anymore
04:04 PM aandrew: Heh
04:07 PM rue_mohr: yep, tupperware
04:09 PM Tom_L: aandrew, they've got ethernet controllers
04:09 PM Tom_L: spi, pci, pcie and parallel port
04:12 PM Tom_L: if you need mayo jars for resistors, maybe just maybe you have too many?
04:46 PM aandrew: Tom_L: yes, ethernet would be even better
04:46 PM aandrew: Tom_L: hush you, there's no such thing as too many resistors
04:50 PM Tom_L: i've got the same controller in ethernet on my test pc as i do on the mill which is parallel port interface to it
04:51 PM aandrew: https://imgur.com/a/oo8sN62 is the bulk of my passives
04:52 PM aandrew: Tom_L: yeah ethernet would be perfect, and way better than USB too
05:08 PM Tom_L: some put the pc inside the control case in which they usually use pci or pcie boards
05:10 PM aandrew: makes sense too, but then you're stuck keeping an entire PC with fans clena
05:10 PM Tom_L: mine is fanless
05:10 PM Tom_L: but isn't in the control either
05:12 PM Tom_L: my control box has a central fan though
07:54 PM rue_mohr: ok stripped down another 10 hard drives
07:55 PM Tom_L: rue_mohr, what are we gonna build when we start stripping ssd?
08:04 PM rue_mohr: thats why its so important to get the old stuff
08:05 PM rue_mohr: the voltages from the power supply that worked good aren't quite what I want
08:06 PM rue_mohr: they would work
08:16 PM Tom_L: FNIRSI-1C15 any good?
08:16 PM Tom_L: https://www.amazon.com/Professional-Oscilloscope-Sampling-Bandwidth-Waveform/dp/B08ML9F6TF
08:18 PM rue_mohr: hmm
08:18 PM rue_mohr: 500Msps
08:19 PM rue_mohr: I hit 1G on mine quite often