#robotics Logs
Jan 06 2018
#robotics Calendar
12:14 AM rue_mohr: hey, at some point int eh last 14 years, the detents dissapeared in my mouse wheel
12:18 AM mrdata: must have been too chewy
01:20 AM anonnumberanon: what do you call it when you talk to my roommate and no matter what she seems extremely deranged by communication
01:20 AM anonnumberanon: any interaction feels like she wants to die
01:34 AM ace4016: extreme social anxiety
01:34 AM ace4016: from the sounds of it
02:35 AM anonnumberanon: huh...
03:44 AM rue_mohr: I FOUND TWO 2.2NF CAPACITORS!
03:44 AM rue_mohr: I prolly removed and measured 300 caps to find it
03:58 AM Poltergiest: anyone in sydney
03:58 AM rue_mohr: I hope so, its a big city
03:59 AM Poltergiest: lol
03:59 AM Poltergiest: rue_mohr, r u from sydney
03:59 AM rue_mohr: I was there once upon a time, does that count?
04:00 AM Poltergiest: no
04:00 AM Poltergiest: :)
04:00 AM rue_mohr: theBear, might be
04:00 AM Poltergiest: where r u from
04:01 AM rue_mohr: mar...
04:01 AM rue_mohr: canada
04:01 AM Poltergiest: ohh
04:01 AM Poltergiest: where the cold is
04:01 AM Poltergiest: cold storm
04:01 AM rue_mohr: hah not here
04:01 AM Poltergiest: cool
04:01 AM rue_mohr: its 6c out
04:02 AM Poltergiest: degrees Celsius?
04:02 AM rue_mohr: yes
04:02 AM Poltergiest: not that bad i guess
04:02 AM Poltergiest: tomorrow will be 43 d c
05:28 AM anonnumberanon: it's -14C here
05:28 AM anonnumberanon: wtf
05:28 AM anonnumberanon: coldest so far
07:39 AM anonnumberanon: https://www.aliexpress.com/item/NRF51822-2-4G-Wireless-Module-Wireless-Communication-Module-Bluetooth-module-zigbee-module-DMX512/32253618123.html?spm=2114.search0104.3.105.sb9Ggz&ws_ab_test=searchweb0_0,searchweb201602_3_10152_10151_10065_10130_10068_10344_10324_10547_10342_10325_10546_10343_10340_10548_10341_10545_10084_10083_10307_10059_10314_10534_100031_10604_10103_10142,searchweb201603_2,ppcSwitch_5&algo_expid=cd001c1a-af29-
07:39 AM anonnumberanon: 4ef4-bdfe-d5d399e86b9f-18&algo_pvid=cd001c1a-af29-4ef4-bdfe-d5d399e86b9f&transAbTest=ae803_5&priceBeautifyAB=0
07:40 AM anonnumberanon: https://www.aliexpress.com/item/NRF51822-2-4G-Wireless-Module-Wireless-Communication-Module-Bluetooth-module-zigbee-module-DMX512/32253618123.html
11:00 AM rue_bed: anonnumberanon, you only need to copy up to the ?
11:00 AM rue_bed: everything else is your tracking and account information
11:01 AM rue_bed: anonnumberanon, do you like the really high freq rf stuff?
12:20 PM rue_shop: over here, over here!
12:21 PM * Tom_L tosses a football at rue_shop since he doesn't know what else to throw
12:58 PM rue_shop: yea, where did my url go?
12:58 PM rue_shop: I'M OPEN!!!!
12:59 PM rue_mohr: http://www.drdobbs.com/cpp/a-simple-and-efficient-fft-implementatio/199500857
05:42 PM tumdedum_ is now known as tumdedum
06:43 PM Tom_L: ok rue_mohr, here's the Y axis: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/Y_Motormount1.jpg
06:43 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/Y_Motormount2.jpg
06:43 PM Tom_L: aligned better than the X one
06:53 PM Tom_L: https://www.youtube.com/watch?v=QCva7pnMtEQ
06:53 PM Tom_L: as you can see
07:08 PM rue_mohr: apparently 110k is a resistor value you will NEVER see on a surface mount circuit board
07:09 PM rue_mohr: Tom_L, nice
07:09 PM rue_mohr: and dont bother trying to get 3.9nf caps either
07:12 PM rue_mohr: or was it 4.2
07:12 PM Tom_L: the Z will have to be adjustable so i'll do it different
07:15 PM rue_mohr: for now maybe I'll stack 2 220k
07:15 PM rue_mohr: ~ugh~
07:16 PM rue_mohr: Tom_L, do you have connectors for the motors yet?
07:51 PM Tom_L: connectors?
07:51 PM Tom_L: they're wired up if that's what you mean
07:52 PM Tom_L: i might have to redo that though
07:52 PM Tom_L: they may not be quite long enough since i cut them for the sherline and added a bit
09:04 PM rue_shop: this is really frustrating, every second value of part I need is non-existant
09:14 PM Tom_L: i kinda didn't want to weld that one but really didn't leave myself many options
09:36 PM rue_shop3: 240k is another value that isn't to be found
09:57 PM Tom_L: so you got all those resistors and still need more?
10:06 PM rue_mohr: values
10:06 PM rue_mohr: its missing 110k and 240k
10:06 PM rue_mohr: which dont exist on any of the pcb's I have
10:06 PM rue_mohr: how can I have a shop half filled with old pcb's and those values NOT exist anywhere among them?
10:07 PM rue_mohr: I blame analog(.com) they desiged these analog filters around unobtainable values
10:07 PM rue_mohr: even tho I dialed it down
10:07 PM rue_mohr: to e24 values
10:08 PM Tom_L: ok so i need an opinion
10:08 PM rue_mohr: otherwise my idea works ok, a little 4 pin sip, that is all the passive components for an active filter
10:08 PM rue_mohr: k
10:08 PM rue_mohr: so active filter = op-amp + sip
10:08 PM Tom_L: do i mount the limit switches in the middle of the travel and put tabs on each end of the axis so they hit in the middle or do i put them at the ends
10:08 PM rue_mohr: the sips are easy to build, if you dont spend 9 hours looking for a capacitor
10:09 PM Tom_L: and let the end of the axis hit the switch
10:09 PM rue_mohr: hmm
10:09 PM Tom_L: i'm thinking to mount them in the middle
10:09 PM rue_mohr: I'll avoid the answer you wont like, and the one you would just reject
10:10 PM Tom_L: there is no wrong answer here
10:10 PM rue_mohr: and I'll say, yes, mount them in the middle but as side-cam devices not end-on contact
10:10 PM Tom_L: not sure i follow
10:11 PM rue_mohr: instead of -] -> \switch
10:11 PM rue_mohr: put the switch to the side of a
10:11 PM rue_mohr: \_________/
10:11 PM Tom_L: yeah i see what you mean i think
10:11 PM rue_mohr: o----switch
10:12 PM rue_mohr: so, you cant crash it
10:12 PM Tom_L: the ones i got have rollers on them
10:12 PM rue_mohr: yes
10:12 PM Tom_L: the sherline ones are dead on
10:12 PM rue_mohr: its a bad drawing, I need more glyphs
10:12 PM Tom_L: but i'm not wanting the roller arms to get clogged with crap
10:12 PM rue_mohr: its not zero its limit
10:12 PM Tom_L: which they could
10:13 PM rue_mohr: and they can be under table (*)
10:13 PM Tom_L: on X they can i think
10:13 PM rue_mohr: (* hell if I actually know)
10:13 PM Tom_L: the next problem is getting the drag chain mounted so it will not hit anything
10:14 PM rue_mohr: yea, I'v not worked that all out yet
10:14 PM Tom_L: and it needs a fairly big radius to turn so i'll have to raise the mill up
10:14 PM rue_mohr: or go up
10:14 PM Tom_L: it would be in the way
10:14 PM * rue_mohr thinks
10:15 PM Tom_L: i should have gotten smaller chain but i didn't know
10:15 PM rue_mohr: use laminated wire
10:15 PM rue_mohr: flat lam wire
10:15 PM Tom_L: i already have the wires i'll be using
10:15 PM Tom_L: a whole spool of stepper wire
10:16 PM Tom_L: and plenty of shielded stuff for the switches
10:17 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/emc/small_probe7_small.jpg
10:17 PM Tom_L: that's the wire i'll be using
10:17 PM Tom_L: that and some white stuff
10:17 PM Tom_L: one is 3 and the other is 2 cond
10:17 PM rue_mohr: https://www.aliexpress.com/item/5-pcs-200MM-Length-30-Pin-0-5mm-Pitch-FFC-TTL-Ribbon-Flat-Cable-Reverse-Direction/32463355787.html
10:18 PM rue_mohr: but big, just for the x axis
10:18 PM rue_mohr: ?
10:18 PM Tom_L: i'll not be using that
10:18 PM Tom_L: it MUST be shielded
10:18 PM rue_mohr: it could roll between the plates
10:18 PM rue_mohr: for the motor
10:19 PM Tom_L: 2 won't need it
10:19 PM Tom_L: Y and Z are fixed mounted
10:19 PM Tom_L: X will move
10:19 PM rue_mohr: isn't the X motor to Y slider the main problem?
10:19 PM Tom_L: yes i believe so
10:19 PM Tom_L: it might be high enough to clear
10:29 PM Tom_L: ok so i should start figuring out some mounting blocks for the switches
10:31 PM rue_mohr: https://www.aliexpress.com/item/10PCS-PAM8403-Super-mini-digital-amplifier-board-2-3W-Class-D-digital-amplifier-board-efficient-2/1127846636.html
10:31 PM rue_mohr: #!$%@$^@!^!#^@$&!@#@!$ HOW CAN I NOT BUY IT
10:32 PM Tom_L: so why not?
10:32 PM Tom_L: ok these screws go thru the switch holes, now to figure out what size they are
10:33 PM rue_mohr: m2.5
10:33 PM rue_mohr: sorry, m2.5-.0000000045
10:33 PM Tom_L: looks like 4-40 fits
10:33 PM Tom_L: what's that in metric?
10:33 PM rue_mohr: cause, metric pitch is in mm
10:33 PM rue_mohr: :)
10:34 PM Tom_L: but these aren't quite long enough
10:34 PM Tom_L: so i'll have to get some either way
10:35 PM Tom_L: these are 1/2" long so i'll get some that are 5/8 and that should do ok
10:35 PM rue_mohr: ok what was I actually looking for
10:35 PM Tom_L: these stick out the other side about .090" but i don't think that's quite enough
10:38 PM Tom_L: https://www.ebay.com/itm/10-pc-TEMCo-Micro-Limit-Switch-Short-Roller-Lever-Arm-SPDT-Snap-Action-home-LOT/400514508501?hash=item5d408666d5:g:wjsAAOSwUg9aTpUe:sc:USPSFirstClass!67213!US!-1
10:38 PM Tom_L: similar to what i got
10:38 PM Tom_L: mine have a longer arm
10:39 PM Tom_L: which i'm not crazy about
10:40 PM rue_mohr: oh you got hte big ones
10:40 PM Tom_L: bot showed up in avr
10:41 PM Tom_L: yeah i think by accident
10:41 PM Tom_L: but i'll use em
10:41 PM Tom_L: oh, i wanted the bigger switch, just a shorter arm
10:42 PM Tom_L: need to get crimp connectors for them too, i may not have quite enough
10:50 PM Tom_L: ok, crimp connector inventory good...
10:50 PM rue_mohr: I think robotics might be below the headcount the bot is looking for
10:51 PM rue_mohr: it checks the headcount on a channel before spamming it
10:51 PM Tom_L: i've noticed channels with chanserv it leaves alone
10:51 PM Tom_L: maybe
10:51 PM rue_mohr: for a while it looked like it would not bother channels with an op
10:53 PM Tom_L: i wonder if anybody has an accurate cad of these switches
10:53 PM Tom_L: or at least the hole spacing
10:53 PM rue_mohr: stl?
10:53 PM Tom_L: i don't care
10:53 PM Tom_L: dxf would be ok
10:54 PM Tom_L: i may have it and not know it too
10:54 PM rue_mohr: ok, so
10:54 PM rue_mohr: I built a voice filter
10:55 PM rue_mohr: so a mic preamp and a power amp might be of interest
11:00 PM Tom_L: you should mod my bot to do a whois on everybody that joins a channel
11:00 PM rue_mohr: just catch taht header
11:02 PM Tom_L: https://www.temcocontent.com/attachments/limit_switch_temco_CN0098_dimensions.pdf
11:02 PM Tom_L: how about that!
11:17 PM anonnumberanon: Oh hey rue_mohr listen I have a message for you.
11:20 PM rue_shop: from the bot coder?
11:21 PM rue_shop: oh, you reminded me, I have to take apart those two printers that turned up on my deck
11:21 PM rue_shop: then maybe I'll just play with the fft code
11:22 PM rue_shop: anonnumberanon, did you work out how to reverse 8 bits of binary in 3 assembler instructions
11:27 PM anonnumberanon: Time is money.
11:27 PM anonnumberanon: Time is money
11:28 PM anonnumberanon: Time is money.
11:32 PM rue_shop: anonnumberanon, how much money are you wasting by sleeping every night then?
11:33 PM rue_shop: anonnumberanon, I'll give you a hint, the 2nd instruction is NOP
11:33 PM Tom_L: ok during all that fuss, i did the cad cam for my switch
11:33 PM * rue_shop explodes
11:35 PM anonnumberanon: Why would that be a hint?
11:36 PM anonnumberanon: Your waiting for the first instruction to execute before you do the third?
11:39 PM anonnumberanon: Probably something with rol ror
11:39 PM rue_mohr: verry apt
11:40 PM rue_mohr: I dont think you can think out of the box
11:40 PM rue_mohr: THINK OUTSIDE THE BOX
11:41 PM rue_mohr: hahahahahhahahaha
11:41 PM anonnumberanon: Lol
11:41 PM anonnumberanon: What box?
11:42 PM rue_mohr: I hear gears turning, I'm gonna wait
11:43 PM rue_mohr: "the box of the conventional design that is all they feed you at school anonnumberanon "
11:44 PM rue_mohr: I know what I' like about working in the shop, the lack of COLD DRAFTS
11:46 PM Tom_L: you got drafts in the house?
11:46 PM rue_mohr: its ben proven that school kills imagination
11:46 PM Tom_L: i can believe that
11:46 PM rue_mohr: Tom_L, well, kinda, the walls cool the air so hard that it causes large convection currents
11:47 PM Tom_L: not well insulated?
11:47 PM rue_mohr: its a trailer
11:47 PM Tom_L: i know
11:47 PM Tom_L: part of it is anyway
11:47 PM rue_mohr: the walls themself are 3" thick
11:47 PM Tom_L: or is the whole thing?
11:47 PM rue_mohr: half
11:48 PM rue_mohr: the insulation is about 1.5" thick
11:48 PM Tom_L: ok i got a little bit done tonight
11:48 PM Tom_L: i don't feel so bad
11:48 PM rue_mohr: its almost like its there as a technicallity of some sort
11:48 PM rue_mohr: I got those filters working
11:48 PM Tom_L: audio?
11:48 PM Tom_L: nice
11:48 PM rue_mohr: I have a 4 component, 2nd order, bandpass filter working
11:49 PM rue_mohr: 300hz - 3Khz, technically
11:49 PM Tom_L: got the Y axis mounted and cad for the switches ready
11:49 PM rue_mohr: the rolloff is slow enough that its hard to tell
11:49 PM rue_mohr: Tom_L, next time your out, grab an updated overall shot
11:50 PM rue_mohr: you have another peice to get machined dont ya?
11:51 PM Tom_L: oh, i've been working on it in pieces now since i have limited room
11:51 PM Tom_L: i should machine all the steel but i may not
11:51 PM Tom_L: it's fairly flat
11:51 PM Tom_L: once i get there i'll put a dial indicator on them again
11:52 PM rue_mohr: since I got my machine worked I'm supposed to take it apart, move the pillar back 2" and paint it...
11:52 PM rue_mohr: maybe whent eh weather is nice
11:52 PM Tom_L: i'm unsure what color to paint it
11:52 PM Tom_L: and what type of paint to use
11:52 PM anonnumberanon: rue_mohr are you trying to do this witha loop?
11:52 PM Tom_L: i'd like epoxy but am not gonna pay for it
11:52 PM anonnumberanon: Loop/branch
11:52 PM rue_mohr: beige/orange/yellow
11:53 PM rue_mohr: anonnumberanon, nope, 3 cycles
11:53 PM Tom_L: so it may come from a spray can
11:53 PM rue_mohr: reverse 8 bits of data
11:53 PM Tom_L: i'm not sure yet
11:53 PM anonnumberanon: So 2 cycle instruction and one cycle for the nop correct?
11:53 PM Tom_L: that was his hint i believe
11:53 PM rue_mohr: yup
11:54 PM rue_mohr: no
11:54 PM rue_mohr: 3 instructions, 3 cycles
11:54 PM rue_mohr: 1 cycle ea
11:54 PM rue_mohr: http://paste.debian.net/1003842/
11:54 PM rue_mohr: same result as that code
11:55 PM rue_mohr: but using 3 assembler instructions
11:57 PM Tom_L: ok i think it's time to sleep
11:57 PM rue_mohr: gnight
11:57 PM rue_mohr: I'm gonna pick at fft code till 2am
11:58 PM rue_mohr: there is a table bit reversal that still isn't making sense