#garfield Logs
Sep 16 2018
#garfield Calendar
12:01 AM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/encoder/encoder_wheel_30a.jpg
12:05 AM Tom_L: wait, that's wrong...
12:05 AM Tom_L: ok now it's fixed
12:05 AM Tom_L: same pic
12:05 AM Tom_L: those should be uniform
12:05 AM Tom_L: 6 deg wider at the edge than the cente
12:05 AM Tom_L: r
12:06 AM Tom_L: .050" centers on those arcs + .03125 so .081" wide slot
12:06 AM Tom_L: but will that be enough for the detector?
12:21 AM rue_mohr: looks great
12:21 AM rue_mohr: yea, their fine
12:23 AM rue_mohr: Tom_L, play with a mask, two channels that are ~90 degrees apart
12:26 AM Tom_L: ?
12:31 AM rue_mohr: a sensor mask
12:31 AM rue_mohr: plate with two holes that are pre-aligned 90 degrees out of phase
12:32 AM Tom_L: another disk?
12:41 AM Tom_L: rue_mohr, actually if you place the sensor 90 degrees apart from each other they will fall 90 degrees out of phase since there are 30 slots
12:42 AM rue_mohr: not a whole disc
12:42 AM rue_mohr: just two holes
12:42 AM Tom_L: when the slot on the right is centered, the space at the top is centered in the model
12:42 AM Tom_L: i know
12:42 AM rue_mohr: ok
12:42 AM Tom_L: just a sec and i'll show you what i mean
12:44 AM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/encoder/phase.jpg
12:45 AM Tom_L: the lines are at 180 and 96 degrees respectively
12:45 AM Tom_L: the holes are 90 degrees apart
12:45 AM Tom_L: see where the slots and spaces are?
12:45 AM Tom_L: that should make it real easy
12:51 AM rue_mohr: thats 180
12:51 AM rue_mohr: ...
12:52 AM rue_mohr: so you would want 93 degrees?
12:52 AM rue_mohr: for a 90degree phase difference?
12:52 AM rue_mohr: 11pm, and I'm tired, damn, I must be broken
12:55 AM Tom_L: 1am
12:56 AM Tom_L: the holes at 90 degrees should always make or break the slot edges no matter what direction they are going
12:57 AM Tom_L: not sure where you're getting 93 degrees
12:57 AM Tom_L: i just put the lines in there as a reference
12:58 AM Tom_L: i think at 93 degrees you would be breaking the wrong edge of the slot
12:59 AM Tom_L: unless i'm understanding it wrong
12:59 AM Tom_L: wait, for quadrature i think you're right on that
01:00 AM Tom_L: so yeah 93 degrees would do it i believe since there are 4 edges to a cycle
01:01 AM Tom_L: nevermind.... i'm tired
01:02 AM Tom_L: but now i do think 93 is your number
01:13 AM rue_shop3: :)
01:24 AM rue_shop3: ITR8307
01:32 AM rue_mohr: I hate to do this, but I'm going to bed
11:06 AM Tom_L: ok got a batch ready to machine. just gotta find time to run em
11:08 AM rue_mohr: :)
11:08 AM rue_mohr: nice to have something fun to look forward to eh?
11:10 AM Tom_L: so you can plan your part of it, the disk is the same the slots are more uniform and shorter
11:10 AM Tom_L: unless you want a smaller hole
11:12 AM rue_mohr: 5mm is great
11:13 AM rue_mohr: 5mm facilitates the bearings ones, if I make a human operated, I turn down a step in the end of a 1/4" (so the story seems to go)
11:13 AM Tom_L: did those press on tight enough?
11:14 AM rue_mohr: used the drill press, does not want to come off
11:14 AM Tom_L: should do it
11:14 AM rue_mohr: but even if they did come off by hand, a dab of crazy is totally acceptable for keeping them on
11:14 AM Tom_L: there are charts for diameters for press fit etc but i didn't look
11:16 AM rue_mohr: playing with drawing that nema36
11:16 AM rue_mohr: its... big
11:16 AM Tom_L: i'm sure
11:17 AM rue_mohr: the bolt pattern is larger than the one on the engine
11:17 AM rue_mohr: I'll try to locate the shaft and see if the idea is plausable
11:17 AM Tom_L: i'm off..
11:17 AM rue_mohr: l8tr
11:35 AM rue_mohr: wow, its just a hair off from a nema34
11:39 AM rue_mohr: http://ruemohr.org/~ircjunk/projects/siggen/p1100698.jpg
11:39 AM rue_mohr: tom ^ V
11:39 AM rue_mohr: http://ruemohr.org/~ircjunk/projects/siggen/p1100699.jpg
11:39 AM rue_mohr: http://ruemohr.org/~ircjunk/projects/siggen/p1100700.jpg
11:40 AM rue_mohr: I recon I didn't take pics of the new back I printed
04:11 PM Tom_L: is the shoulder too thick?
04:13 PM Tom_L: you could put both sensors on the tab at 15 deg and i _think_ it would be the same as 93
04:14 PM Tom_L: since they're 12 deg apart +3
04:14 PM Tom_L: that or 9 deg maybe
04:14 PM Tom_L: 9 may not be enough separation for the sensors to mount
04:15 PM Tom_L: gonna go cut some new ones here in a bit
04:15 PM Tom_L: 1 then take a pic
05:36 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/encoder/encoder8.jpg
05:36 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/encoder/encoder9.jpg
05:44 PM Tom_L: now it's just a matter of whether the mark or space should be the triangle
06:14 PM rue_mohr: ooo
06:17 PM rue_mohr: about how long is it taking you to make how many of those?
06:17 PM rue_mohr: 2 bits in the job, eh?
06:22 PM Tom_L: yeah
06:24 PM Tom_L: i dunno, i made a grid of 5 x 4 and the cad said about 152 min
06:24 PM rue_mohr: did it take that long?
06:25 PM Tom_L: just as many tool changes to make one as 20
06:25 PM rue_mohr: yea
06:25 PM Tom_L: i only made one
06:25 PM rue_mohr: oh
06:25 PM Tom_L: to see
06:25 PM rue_mohr: it looks good
06:25 PM Tom_L: gotta cut some more material
06:25 PM Tom_L: had that scrap already loaded
06:25 PM rue_mohr: too bad I cant send you a whole whack of the small material scraps we have here
06:26 PM Tom_L: so probably work better than the first batch?
06:26 PM rue_mohr: maybe a minor timing difference
06:26 PM rue_mohr: I need to work out the optical stuff next
06:26 PM Tom_L: doesn't matter to me which one i make
06:26 PM rue_mohr: I just spent a few hours helping a fellow with a pcb repair for his pinball machine
06:27 PM rue_mohr: we had to stop, I apparently dont have any 63V zeners
06:27 PM rue_mohr: the newer ones probably do have better timing, if its a hand wheel, doesn't really matter
06:27 PM rue_mohr: for servos, sure
06:27 PM Tom_L: i'll stick with those then
06:28 PM rue_mohr: you have a lathe, dont ya?
06:28 PM Tom_L: yeah
06:28 PM Tom_L: old and rickety
06:28 PM rue_mohr: want the design for the other parts?
06:28 PM Tom_L: i'm not gonna make any
06:28 PM rue_mohr: I can send ya the FR4 milling outline
06:28 PM rue_mohr: mail ya some backboxes
06:28 PM rue_mohr: its something to do
06:29 PM Tom_L: i'm not much into that now
06:29 PM Tom_L: packed all the robotic stuff in boxes
06:29 PM rue_mohr: attic, you mentioned
06:29 PM Tom_L: not enough free time to do much i want
06:29 PM rue_mohr: I should take my vaccation in kansas next year
06:30 PM rue_mohr: then when I head back, I can say "were not in kansas anymore"
06:30 PM rue_mohr: maybe I can rent a dog called toto
06:30 PM rue_mohr: meh
06:30 PM rue_mohr: is the band still togethor? (toto)
06:31 PM Tom_L: no idea
06:31 PM Tom_L: i doubt it
06:31 PM rue_mohr: you want a different design that provides some interesting challanges?
06:31 PM rue_mohr: slotted tube version
06:32 PM rue_mohr: I think if you cut the slots before the walls, it could be pulled off
06:32 PM rue_mohr: maybe
06:32 PM rue_mohr: its an option I didn't persue
06:34 PM Tom_L: just cut the tube to length and slot it after
06:34 PM Tom_L: hold it down with a screw & washer with a rubber donut inside to expand
06:34 PM rue_mohr: ah its needs a cap that will fit it to a 5mm shaft
06:34 PM Tom_L: these are more practical
06:35 PM rue_mohr: yea, I didn't follow the other way
06:35 PM Tom_L: otherwise they'd all be like that
06:35 PM rue_mohr: but, being able to drop the ir emitter into the middle of the cup is easy
06:35 PM Tom_L: gonna go pick up the kid from work
06:36 PM rue_mohr: l8tr
06:36 PM Tom_L: 30-45 min
06:36 PM rue_mohr: ma likes the encoder wheels I printed for her art stuff, so
06:36 PM rue_mohr: go print another 12 of them
06:36 PM rue_mohr: ...
06:37 PM Tom_L: bbiab
06:37 PM Tom_L: do some more snowflakes :D
07:29 PM Tom_L: ok now what
07:33 PM Tom_L: for an endcap one, use some pvc pipe end thingies
07:33 PM Tom_L: maybe
07:35 PM rue_shop4: the endcap alone is too big
07:35 PM Tom_L: or copper ones
07:36 PM rue_shop4: but I wonder about a cutting disc and a cnc blade
07:36 PM Tom_L: copper is a bitch to machine though
07:36 PM Tom_L: my spindle doesn't have enough poop to use a disk
07:36 PM Tom_L: i have a couple slitting saws
07:36 PM Tom_L: but they're thin
07:36 PM rue_shop4: I'm talking a dremel one tho
07:36 PM Tom_L: .045
07:37 PM Tom_L: these are 2-2.5" diameter
07:37 PM Tom_L: i'd guess
07:37 PM Tom_L: 1" arbor
07:37 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Cutter.jpg
07:37 PM Tom_L: like that only different
07:42 PM Tom_L: be easy on a rotary but not necessary
07:44 PM Tom_L: you would break cutters if you tried to slit a tube from the end without leaving it connected on the end
07:44 PM Tom_L: the material would vibrate too much
08:13 PM rue_mohr: ok, I think I have the measurements to locate the shaft on the engine
08:36 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/encoder/encoder_batch.jpg
08:36 PM Tom_L: all ready to go
08:39 PM rue_mohr: cool
08:40 PM Tom_L: nice thing about cad
08:40 PM Tom_L: all the tools repeat in order too
08:41 PM Tom_L: so 4.5 x 5.5 x .125 ...
08:41 PM rue_mohr: repreat in order?
08:41 PM Tom_L: all one cut does all the parts before moving to the next tool
08:41 PM rue_mohr: right, this is good :)
08:41 PM Tom_L: 3 tool changes
08:42 PM Tom_L: 3 tool changes for one part tooo :D
08:42 PM rue_mohr: the locate failed the sanity check
08:42 PM rue_mohr: I'm off by 0.9mm
08:42 PM rue_mohr: thats too much
08:42 PM rue_mohr: 3 tool changes?
08:42 PM Tom_L: no room for a needham coupler?
08:42 PM rue_mohr: whats the 3rd tool?
08:42 PM Tom_L: back to the first one to cut the profile
08:42 PM rue_mohr: I would accept 0.1mm or 0.25mm
08:43 PM rue_mohr: 0.9mm means I'm jsut wrong
08:43 PM Tom_L: cut the center, cut the disk, change and do the slots, change and cut the perimeter
08:43 PM rue_mohr: can you to the final cutout with the small one?
08:43 PM Tom_L: no
08:43 PM Tom_L: it's too short for one
08:43 PM rue_mohr: dig out the desc extra?
08:43 PM Tom_L: and too much stress on the cutter
08:44 PM rue_mohr: hmm
08:44 PM Tom_L: not worth it
08:44 PM rue_mohr: I'm gonna go remeasure
08:44 PM Tom_L: the .125 does a good job for profiling
08:55 PM rue_mohr: damn, I'm still 0.5mm out
09:18 PM rue_mohr: haha 0.05mm!
09:18 PM rue_mohr: close enough!
09:19 PM rue_mohr: aha! and!!! its all designed in metric, so I can see from the rounding what it should be
09:20 PM Tom_shop: running the rest of this scrap piece before i start the batch
09:21 PM Tom_shop: maybe 6 off this
09:21 PM rue_mohr: you making anything for yerself?
09:22 PM rue_mohr: christmas stuff?
09:22 PM Tom_shop: bah humbug
09:22 PM rue_mohr: oh cmon, you could take some lineart, make it a skelatonized set of pockets, cut thru, fill 'em will coloured epoxy
09:23 PM rue_mohr: put a little hanging hook on the top and issue them as window junk
09:23 PM rue_mohr: ...er... art
09:23 PM rue_mohr: :)
09:23 PM rue_mohr: and make aluminum snowflakes
09:25 PM rue_mohr: ok, fitting this nema flange up agsinst the current work, hmmmm
09:27 PM rue_mohr: its definitly not a natural fit
09:28 PM rue_mohr: ah
09:28 PM rue_mohr: its almost like I want to adapt the flange to the engine instead of the engine to the flange.......
09:30 PM rue_mohr: ooh I think linknuts can get me out of this
09:31 PM rue_mohr: ok I need M8 link nuts
09:31 PM Tom_shop: nice thing about that batch is i can cut n paste any out to use up the material
09:31 PM rue_mohr: with the latches, I just made the job for one, we would reposition 0 for successive jobs depending on available material
09:32 PM rue_mohr: with that zero trick you taught me, I was able to have it 'auto guess' and prezero for the next peice
09:32 PM rue_mohr: so you just had to hit run
09:32 PM rue_mohr: but, only 1 bit
09:33 PM rue_mohr: ok Tom_shop , my idea for mounting the engine also takes care of the vibtration isolation
09:34 PM rue_mohr: the engine bolt pattern is about a 20mm offset of the nema bolt pattern
09:34 PM rue_mohr: so, if I oversize the nema plate on one end, I can bring everything to it, mount the engine on spacers
09:34 PM rue_mohr: I'll need to find some really mean spacers
09:35 PM rue_mohr: but its a solution
09:36 PM rue_mohr: oo its more like 9mm offset
09:39 PM rue_mohr: see, if you were my neighbour we could make up this adapter plate easy
09:39 PM rue_mohr: sit back and drink tea and a slushie watching it get cut out
09:40 PM rue_mohr: ok, now I'm excited
09:42 PM Tom_shop: dammit i lost one
09:42 PM rue_mohr: the adapter is 3.4" by 3.9", is your machine big enough for that? you can go up to about 8" cant ya?
09:42 PM rue_mohr: is the bit ok?
09:42 PM Tom_shop: it'll turn up in the chips
09:42 PM Tom_shop: yeah it's just whittling away
09:42 PM Tom_shop: 2 done batch of 3 then one more and the material is gone
09:43 PM Tom_shop: couldn't do 4 cause it's offset from the others
09:43 PM rue_mohr: I'd use two tiepoints, cause you can 'spin' them out
09:43 PM rue_mohr: endover
09:43 PM Tom_shop: no, it works good
09:43 PM rue_mohr: k
09:43 PM Tom_shop: peel em out like opening a pop can
09:43 PM rue_mohr: :)
09:44 PM rue_mohr: ok, I'm gonna be insane and print this engine pan
09:44 PM rue_mohr: ... LOW infill
09:44 PM Tom_shop: debur the slots with another cuter
09:45 PM Tom_shop: the material is warped a bit
09:45 PM rue_mohr: did you clean up most of the edges of the ones you sent me?
09:46 PM Tom_shop: i don't remember
09:46 PM Tom_shop: maybe some
09:46 PM rue_mohr: they were pretty good
09:46 PM rue_mohr: used the fine+dull belt on the sander to brush off the tabs,
09:47 PM Tom_shop: #3 slots almost done
09:48 PM Tom_shop: profile goes quick
09:50 PM Tom_shop: 1 of 3 done
09:51 PM Tom_shop: 2 of 3 done
09:52 PM Tom_shop: 3 of 3 done
09:54 PM rue_mohr: cool
09:55 PM Tom_shop: single one started
09:55 PM rue_mohr: ok, I'm gonna see if this thing fits in the printer...
09:55 PM Tom_shop: i'm not even gonna debur those, they look pretty good
09:55 PM Tom_shop: pics to come
09:56 PM rue_shop4: man that engine is small!
09:57 PM rue_shop4: easy fit on my small printer
09:58 PM Tom_shop: almost screwed that one up
09:58 PM Tom_shop: loaded the old single program instead
09:59 PM Tom_shop: one slot may look a little funny :)
10:00 PM Tom_shop: i'm gonna leave the tab on the ones i didn't debur so you can see how they come off
10:12 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/encoder/encoder10.jpg
10:12 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/encoder/encoder11.jpg
10:12 PM Tom_L: you can see the one i fcked up
10:12 PM Tom_L: slots were not aligned
10:12 PM Tom_L: but the ones with the tab have no debur
10:13 PM rue_shop4: huh
10:13 PM Tom_L: i started the cad on the new one in a different place on the slot
10:13 PM Tom_L: or it would have been salvageable
10:13 PM rue_shop4: looks like that one almost lost your bit
10:14 PM Tom_L: naw
10:14 PM Tom_L: i stopped it when i saw what was happening
10:14 PM rue_shop4: they look awesome
10:15 PM rue_shop4: I think I did one job that had a bit change, but I did it as two seperate jobs
10:15 PM Tom_L: no need with this
10:15 PM rue_shop4: what does emc do when it sees a T0 then?
10:15 PM Tom_L: as long as i have a holder for each one
10:15 PM Tom_L: umm i forget but it is valid
10:15 PM rue_shop4: ah your pre-registering them
10:15 PM Tom_L: yes
10:15 PM Tom_L: i set them all up front
10:15 PM rue_shop4: WTF
10:16 PM rue_shop4: the printer just shut down after half the first layer
10:20 PM rue_shop4: huh, I swear its got a static issue or something
10:20 PM rue_shop4: that first printer has had a few reeeeealy intermittent issues
10:20 PM rue_shop4: once in a blue moon things
10:25 PM __M00N__: HAY rue!
10:25 PM __M00N__: http://www.rinkworks.com/stupid/cs_programming.shtml
10:25 PM __M00N__: night>
10:34 PM rue_shop4: heh
10:44 PM Tom_L: :)
10:45 PM Tom_L: printer got ground loops?
10:45 PM Tom_L: star everything
10:49 PM Tom_L: 9 or 21 degrees offset would get you the quadrature if you can mount those on the tab of the pcb
10:49 PM Tom_L: just checked the model
10:50 PM Tom_L: 21 would give you more room to mount them
10:51 PM rue_mohr: not sure, for some reason the power supply trips out like its had a hard short
10:52 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/encoder/phase1.jpg
10:52 PM rue_mohr: its a smart supply
10:52 PM Tom_L: does that look right?
10:52 PM rue_mohr: yes, those are 9 and 21?
10:52 PM Tom_L: one is 9 the other is 21
10:53 PM rue_mohr: might need a bit more distance, but ok
10:53 PM rue_mohr: 12 degree diff
10:53 PM Tom_L: need one more?
10:53 PM rue_mohr: 33
10:53 PM rue_mohr: and 45?
10:53 PM rue_mohr: huh
10:53 PM Tom_L: 33 yes
10:54 PM Tom_L: 45 yeah
10:54 PM Tom_L: they're off just slightly
10:54 PM rue_mohr: hmm, I wonder if I had my machine drill a mask, where I could postiion it
10:54 PM Tom_L: but that's because of the way i drew the slots
10:54 PM Tom_L: i don't see why not
10:55 PM rue_mohr: http://ruemohr.org/~ircjunk/projects/siggen/p1100698.jpg
10:55 PM rue_mohr: I have room behind the disc, not realy sure of how much
10:55 PM rue_mohr: I think I left enough for a 3mm led
10:56 PM Tom_L: you can always add a spacer
10:56 PM rue_mohr: wherehownow?
10:56 PM Tom_L: if the encoder is too close to the pc
10:56 PM Tom_L: b
10:56 PM Tom_L: a washer
10:57 PM rue_mohr: I have some slot interrupters that might be tight enough to not need a mask
10:57 PM Tom_L: i thought that's what you were gonna use
10:57 PM rue_mohr: I only have a few of them
10:57 PM Tom_L: they make more
10:58 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/new_pulleys/old_pulley2.jpg
10:58 PM Tom_L: do they make em that mount the other way?
10:58 PM rue_mohr: https://www.aliexpress.com/item/10PCS-ITR8307-8307-SMD-Optical-switch-reflective-PHOTOTRANSISTOR-OUTPUT-Opto-Interrupter-New-original/32866673769.html
10:58 PM rue_mohr: I got a few of those with the idea of doing a cylinder with reflective lines on it and picking up on them from the edge
10:58 PM rue_mohr: er, side
11:00 PM Tom_L: https://www.mouser.com/ProductDetail/OSRAM-Opto-Semiconductors/SFH-9540?qs=sGAEpiMZZMs50KUSuyRkpvUgYZWIEbzbivtcmxLoLyUzh2HhtFNlsQ%3d%3d
11:00 PM Tom_L: looks like smt to me though
11:01 PM rue_mohr: rong way
11:01 PM rue_mohr: I need it to stand up
11:01 PM Tom_L: https://www.mouser.com/ProductDetail/Sharp-Microelectronics/GP1S173LCS2F?qs=sGAEpiMZZMvQY0bpacMSoUmd3a5r2hG85ysrpiHJbFX5wK8TPbKr5Q%3d%3d
11:02 PM Tom_L: ick
11:02 PM rue_mohr: https://www.aliexpress.com/item/Free-Shipping-5pcs-photoelectric-switch-ITR20005-photoelectric-interrupter-photoelectric-sensor-photoelectric-eye-AJJ4/32807990382.html
11:02 PM rue_mohr: but smaller
11:03 PM Tom_L: the legs still come out the back
11:03 PM Tom_L: https://www.mouser.com/ProductDetail/Sharp-Microelectronics/GP1S52VJ000F?qs=sGAEpiMZZMvQY0bpacMSoT50%2f%2f2nEIfDiYHQDziGWeE%3d
11:03 PM rue_mohr: yes, surface mount on side, and swing wires to the two dangling leads
11:04 PM rue_mohr: https://www.aliexpress.com/item/HAILANGNIAO-10PCS-KY-010-Broken-Light-Blocking-Photo-Interrupter-Sensor-Module-DIY-Starter-Kit-KY010/32870798581.html
11:04 PM Tom_L: https://www.digikey.com/products/en?keywords=GP1S52VJ000F
11:04 PM rue_mohr: I want the sensor thats on that, but I cant find it alone
11:04 PM Tom_L: same part
11:05 PM Tom_L: slot goes the wrong way on it
11:05 PM Tom_L: oh i think i saw one
11:05 PM rue_mohr: mount on its side, and fly wires to the other two leads
11:06 PM Tom_L: https://www.mouser.com/ProductDetail/ROHM-Semiconductor/RPI-125?qs=sGAEpiMZZMvQY0bpacMSoUmd3a5r2hG8EYo8B3JZFGg%3d
11:06 PM Tom_L: close
11:06 PM rue_mohr: thats the kinda size
11:07 PM Tom_L: 1.2mm slot width
11:07 PM Tom_L: pretty small
11:07 PM Tom_L: these wouldn't fit inside that
11:07 PM Tom_L: https://www.mouser.com/ProductDetail/Omron-Automation-and-Safety/EE-SPX403-N?qs=sGAEpiMZZMvQY0bpacMSoe%2fSW2ZYBHmYd9XfNJKkIL8%3d
11:08 PM Tom_L: holy crap. 13mm slot
11:08 PM rue_mohr: https://www.aliexpress.com/item/10-pcs-ITR20005-Infrared-Photoelectric-Switch-Sensor-Slot-Optical-Switch/32874702321.html
11:08 PM rue_mohr: kinda bulky
11:09 PM Tom_L: https://www.mouser.com/ProductDetail/ROHM-Semiconductor/RPI-221?qs=sGAEpiMZZMvQY0bpacMSoc7essLgYqF9jxbcUe12MgE%3d
11:09 PM Tom_L: 2mm slot
11:09 PM rue_mohr: thats it
11:10 PM rue_mohr: now how about ~$0.25 ea?
11:10 PM Tom_L: that's on you
11:10 PM Tom_L: i found kt
11:10 PM Tom_L: it
11:11 PM rue_mohr: hah
11:11 PM Tom_L: they're 6 bux on ebay
11:12 PM rue_mohr: in all reality, I have about 8 interrupters, and thats prolly enough for all of them I'm gonna make soon
11:12 PM Tom_L: 100 for $38
11:12 PM Tom_L: off by a few cents
11:12 PM Tom_L: https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20180916201144&SearchText=RPI-221
11:13 PM rue_mohr: atleast dk will ship to canada
11:14 PM rue_mohr: Iwas surprised to see that you cant just get 0805 IR leds/transistors for cheap
11:14 PM Tom_L: 1.10 ea on dk
11:14 PM rue_mohr: https://www.aliexpress.com/item/10PCS-Encoder-module-20-encoder-optical-encoder-intelligent-barrowload-robot/1857437597.html
11:14 PM Tom_L: do you get mouser?
11:14 PM rue_mohr: there is your market tom! go get it!
11:14 PM rue_mohr: :)
11:15 PM rue_mohr: mouser improved since I got a bucket stuck on my foot by them
11:16 PM rue_mohr: but after being asked to pay $200 total in shipping fees for a twistlock connector that cost $50, I veer away from using them
11:16 PM Tom_L: better get em quick.. uk discontinued them
11:17 PM Tom_L: 10 for 7.60 on mouser
11:17 PM Tom_L: .92 ea
11:17 PM Tom_L: dk was 1.10
11:18 PM Tom_L: ali is still cheaper for 100
11:18 PM Tom_L: 100 @ .49 ea
11:18 PM Tom_L: on mouser
11:18 PM rue_mohr: https://www.aliexpress.com/item/Laser-Sensor-Module-non-modulator-Tube-Laser-Receiver-Module/32847929059.html <-- board says DS18B20, I'm pretty sure thats for a temp sensor
11:19 PM Tom_L: use what you need and ebay the rest for 2.50 ea
11:19 PM Tom_L: they're 6 bux there now
11:19 PM rue_mohr: did you find those small ones on ali?
11:19 PM Tom_L: the ones you said that were it, yes
11:19 PM Tom_L: i posted it
11:19 PM rue_mohr: yea, I want the small ones from china tho
11:19 PM rue_mohr: cant find them
11:19 PM Tom_L: https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20180916201144&SearchText=RPI-221
11:20 PM rue_mohr: oh
11:20 PM rue_mohr: tho I dont want that many...
11:20 PM rue_mohr: ugh
11:21 PM Tom_L: you'll be set for life though
11:21 PM rue_mohr: I'm betting there is another listing for a slightly different model
11:21 PM Tom_L: 10 for 7.60 on mouser
11:22 PM rue_mohr: in all honestly, it'd still be worth it, a TRUE optical sensor, be it only 30 lines, is $$
11:22 PM Tom_L: check the data sheet to see how far in the interupter is
11:22 PM Tom_L: from the edge
11:23 PM rue_mohr: I'm pawning thru 2 windows at once, looking for every word I can think of on ali
11:23 PM Tom_L: you might have to thin the edge on the disk a little
11:23 PM Tom_L: go to that part on dk and view the page for similar
11:23 PM Tom_L: then search ali for that
11:24 PM Tom_L: https://www.digikey.com/catalog/en/partgroup/small-type-optical-sensors/13744?mpart=RPI-221&vendor=846
11:24 PM rue_mohr: https://www.aliexpress.com/item/Photoelectric-Speed-Sensor-Encoder-Coded-Disc-code-wheel-for-Freescale-Smart-car/32219216393.html
11:24 PM rue_mohr: its just 1 channel
11:24 PM rue_mohr: no, wait, wtf
11:24 PM Tom_L: https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20180916202405&SearchText=RPI-352
11:25 PM Tom_L: similar
11:25 PM rue_mohr: ok, its quad, but its $7 ea
11:25 PM Tom_L: 50 for 12
11:25 PM rue_mohr: 50 for $16 thats better
11:25 PM Tom_L: 10 for 4
11:26 PM Tom_L: got that from the dk page
11:26 PM rue_mohr: ok ok, my technique sucks
11:26 PM Tom_L: 3mm sense distance
11:26 PM Tom_L: just about right
11:26 PM rue_mohr: am I saving money over the $7 100 lien quadrature?
11:27 PM Tom_L: no but where's the fun in that
11:27 PM rue_mohr: :) see, thats a good sport!
11:27 PM rue_mohr: https://www.aliexpress.com/item/Free-Shipping-10pcs-CNY70-DIP-4/32728580286.html
11:28 PM rue_mohr: there! my method turned up a result!
11:28 PM rue_mohr: awe its reflective, damn
11:28 PM Tom_L: magnetic sensor
11:29 PM Tom_L: early day tomorrow. i'm out
11:29 PM rue_mohr: gngiht, thanks
11:31 PM Tom_L: the RPI-352 was your best bet from ali
11:31 PM Tom_L: or dk
11:32 PM Tom_L: Rohm Semiconductor
11:32 PM Tom_L: http://rohmfs.rohm.com/en/products/databook/datasheet/opto/optical_sensor/photointerrupter/rpi-352.pdf
11:35 PM rue_mohr: yea, nothing better is turning up for me