#robotics Logs

Oct 20 2014

00:09 rue_house the electonic toaster oven uses an NEC microcontroller
00:09 rue_house :/
00:10 rue_house it was really hard to pin down what the actual part number was
00:10 rue_house uPD(78F?)0477
00:10 rue_house or 0447, I forgot now
00:11 orlock rue: updated firmware on that little mcu, it can now send data via tcp without rebooting, yay
00:11 orlock and the firmware i loaded ads the capability to update itself over the air, triggered from an AT command
00:11 orlock which is cool
00:11 rue_house what does the webpage of a toaster oven look like?
00:11 orlock a bit of a worry, but cool
00:12 orlock two lines, one the current temprature, another saying how long till the door opens?
00:13 orlock rue_house: nimh and nicad batteries are not drop-in compatible in devices that have a self charger are they?
00:13 orlock specifically i'm talking about a solar powered sensor light
00:13 orlock takes 3x 1.2v AA nicad's
00:13 rue_house I dont think so, NiMh has a lower charge current than NiCd
00:13 rue_house if its jus a solar light, go for it
00:14 rue_house remmeber to take the batteries out for the winter
00:14 rue_house those things dont have undervoltage cutouts on them
00:14 orlock its meant to work year round
00:14 orlock we still get sun in the winter :P
00:14 rue_house but not enough, and the battery gets run flat for so long its garbage by spring
00:14 orlock its one of those things with the solar charging panel, a PIR, and a LED spotlight
00:15 rue_house thats why they only last a year
00:15 rue_house too much 0V during winter
00:15 orlock ahh
00:15 orlock the memory effect thing? or something elsE?
00:15 orlock just "crap chemistry"?
00:15 rue_house no, no battery can ever be run completely flat
00:16 rue_house you do NOT run a chargable battery to 0V
00:16 rue_house iirc the 'dead' voltage for a NiCd/NiMh is 1V
00:16 rue_house if you installed a undervoltage cutout they would be fine
00:16 orlock i should be able to jam one of these ESP8266's in there
00:16 orlock and tell it to turn the light on remotely
00:16 rue_house hheheh
00:16 orlock and have it tell me when the sensor is tripped
00:17 rue_house gonna AT it and upload firmware to send me your passwords
00:17 orlock using just the 8266 - no extra avr or whatever
00:17 orlock theres a modified firmware that lets you toggle the GPIO's on and off via IP
00:19 rue_house the timer switch is dieing in my washer
00:19 rue_house seen that hackaday controller?
00:20 orlock hmm maybe?
00:21 orlock what do we have, 10 days till haloween?
00:21 orlock these things also look perfect for jamming into kids toys
00:22 orlock my main issue is with them being 3.3v parts and all my sensors currently being 5v parts, and i'll need a decent way to power the lot
00:24 rue_house who was that guy asking for the closeups of the pots ont he robot arm?
00:33 rue_house ENTERTAINMENT! --->> http://ruemohr.org/~ircjunk/robots/arm9/slide.htm
00:42 rue_house the two spring thing dosn't work, it gives the cables play on where they sit on the pulley
00:43 rue_house TELunus|2, your assignment is to modify slide.htm to include text under the image with the filename
00:44 TELunus|2 Ok. I'll hand it in by this time next week.
00:44 rue_house next week! its due yesterday! :)
00:45 rue_house heh, or more realistic, by 11:00 tonight
00:45 rue_house :)
00:45 rue_house nothing like jamming a project off till the last 10 minutes it'll be acceted
00:46 rue_house I'm gonna ponder how to add a paws button
01:05 rue_house ok I found a paws button
01:11 rue_house http://ruemohr.org/~ircjunk/images/smallpaws.png <-- paws button
01:32 rue_house http://ruemohr.org/~ircjunk/images/bga-adapt1.jpg
01:54 rue_house my buddy blew his inheritance on a drinking addiction http://ruemohr.org/~ircjunk/images/inheritance.jpg
02:15 MjrTom OR you also could have said coke additiction... we would have accepted that too.
09:00 rue_house ah yes, yes
09:00 Tom_itx top of the morning!
09:00 rue_house see if I have time for breakfast today
09:02 Tom_itx late start today
09:03 rue_house not for me
11:50 mrdata late start attempted
19:25 rue_house late?
19:48 Tom_itx very
20:02 rue_house Tom_itx, you see arm9?
20:03 Tom_itx never
20:03 Tom_itx it never happened!
20:06 Tom_itx make me a liar...
20:20 rue_house ENTERTAINMENT! --->> http://ruemohr.org/~ircjunk/robots/arm9/slide.htm
20:21 Tom_L nice bearings
20:21 Tom_L what are they out of?
20:22 Tom_L i bet some of those parts were off your work truck
20:22 Tom_L just a hunch
20:25 Tom_L did you wind the springs?
20:25 Tom_L i've done that...
20:26 rue_house the fusor drum of a copier I think
20:26 Tom_L seem to fit good
20:26 Tom_L did you turn down the conduit
20:26 rue_house no custom springs there
20:26 Tom_L ?
20:26 rue_house yea, the conduit was stepped to fit the bearings
20:26 Tom_L try winding springs sometime
20:26 rue_house I dont have the steel for it
20:26 Tom_L i do
20:26 Tom_L all gages
20:27 rue_house how do you treat it?
20:27 Tom_L i buy it ready to go
20:27 rue_house oh
20:27 Tom_L from that thin stuff i had the other day
20:27 rue_house must expand lots
20:27 Tom_L to probably .030?
20:27 rue_house dia?
20:27 Tom_L 1 ga to 22 or 23
20:28 Tom_L yea
20:28 Tom_L the smaller is used for guitar string
20:28 Tom_L the bigger is piano string
20:28 rue_house hmm a wack of packages still hasn't shown from china
20:28 Tom_L i forgot about one that showed up last week with the PATA thing in it
20:29 Tom_L your arms are getting better
20:30 rue_house I'm finding it interesting what I reuse and what I change every time
20:30 rue_house its sad tho, not many re-used parts
20:31 Tom_L maybe put a dot of solder on those crimps on the wire
20:31 rue_house its plastic coated wire
20:31 Tom_L yeah that's the jewelry wire
20:31 rue_house they hold really well tho, the wire will break before it slips
20:31 rue_house yea
20:32 rue_house ma got rid of a bunch
20:32 Tom_L i've got a roll of it here somewhere
20:32 rue_house its just like small drive cable out of scanners and stuff
20:32 Tom_L i gotta do something about my spindle belts on the mill
20:32 rue_house ?
20:32 rue_house slipping?
20:32 Tom_L i think the pulley i made is just a tad bit too narrow
20:32 Tom_L it's eating belts
20:32 rue_house ah
20:32 rue_house you use a pretty high rpm tho
20:32 Tom_L i wanna use timing pulleys
20:33 Tom_L but i can't seem to find what i need
20:33 Tom_L iirc 1/4" on the motor and 1/2 or 5/8 on the spindle
20:33 rue_house what sizes/ratio?
20:33 Tom_L i forget the ratio
20:33 Tom_L mayb 2:1
20:33 Tom_L i'd have to measure it again
20:33 rue_house I was gonna say 1:10
20:34 Tom_L it's not that much but likely more than 2:1
20:34 Tom_L the calculations i did were spot on though
20:34 Tom_L for the rpm
20:34 Tom_L i could buy theirs but it's $$$$$$$$$$$$
20:35 rue_house china has it
20:35 Tom_L i don't know what series i need for one
20:35 rue_house but that set I got for testing the vacuum motor was like $80
20:35 Tom_L i'd like a small series
20:36 Tom_L but not quite as small as the reprappers use
20:36 Tom_L http://tom-itx.ddns01.com:81/~webpage/motors/motor3.jpg
20:37 Tom_L one of those might work for the motor pulley but i can't get em off
20:37 rue_house I have one more drive left to finish that arm...
20:37 rue_house makea puller
20:37 Tom_L i have one
20:37 Tom_L i think it's too big though
20:37 rue_house ...
20:37 rue_house makea puller
20:37 Tom_L won't fit under the flange
20:38 rue_house did you take the encoders off?
20:38 Tom_L yup
20:38 Tom_L they're on the maxbot
20:38 rue_house ah
20:38 Tom_L nice quadrature ones
20:38 rue_house they look like they are from old expensive computer gear
20:38 Tom_L 2048 count iirc
20:38 Tom_L or copiers
20:38 Tom_L i dunno
20:39 Tom_L those are nice motors
20:39 rue_house so make a puller that fits under
20:39 Tom_L not the same though
20:39 Tom_L similar
20:39 rue_house cnc it from a peice of 1.5" round stock
20:39 Tom_L i don't know what series that pulley is though and i'd need one to match it
20:39 rue_house hmm
20:39 rue_house can you measure the pitch?
20:40 Tom_L i dunno
20:40 Tom_L probably
20:40 Tom_L not exact
20:40 rue_house get a close number
20:40 Tom_L i don't know if it's metric or inch though
20:41 rue_house 'timing pulley'
20:41 rue_house iiits metric
20:42 rue_house http://www.aliexpress.com/item/Free-Shipping-Timing-Belt-Pulleys-Synchronous-belt-deceleration-suite-5M-4-1-CNC-Engraving-Machine-Parts/1533683955.html
20:42 rue_house it prolyl wont be found for a good 'china' price, but I imagine you dont mind putting out for it a bit more than you might other thigns
20:43 rue_house http://www.aliexpress.com/item/Timing-belt-pulleys-Synchronous-belt-for-engraving-machine-synchronous-pulley-the-suite-of-Synchronous-belt-5M/1125712557.html
20:43 rue_house thats a tad pricey
20:43 rue_house free shipping!
20:44 Tom_L i dunno the belt length either
20:44 rue_house well, now youhave the keywords you need
20:45 rue_house I have to close the search window or I'm gonna spend money
20:45 Tom_L keep it open...
20:45 Tom_L does it say the distance between centers?
20:45 rue_house beleive me, me trying to help you, with something like this, is 100% futile
20:46 rue_house dont think so
20:46 rue_house I suspect with those its always good to have a tensioner
20:46 rue_house and if you buy something liket hat you can know what thepitch is and mix/match
20:46 Tom_L the motor slides on slots already
20:46 Tom_L it would need to fit in the space i have
20:46 rue_house bingo
20:48 Tom_L i'll do some measuring later
20:48 Tom_L Two shaft center distance:
20:48 Tom_L 97 mm
20:48 Tom_L on the first one
20:55 rue_shop2 you dont have to buy a kit, I'm just throwing it out there
20:55 Tom_L i know. i caught it
20:55 Tom_L those may be a tad big for my setup
20:56 Tom_L 32mm wide on the big one 30mm wide on the small one
20:56 Tom_L i think anyway
20:56 Tom_L Wall Thickness: 32 mm
20:56 Tom_L isn't that what you'd guess that to be?
20:57 rue_shop2 dunno...
20:57 rue_shop2 the one I got
20:57 rue_shop2 belt is 10mm wide
20:58 Tom_L well i don't switch ratios anyway so i wouldn't need but one
20:58 Tom_L the belt i have now has 2 steps on each pulley
20:59 Tom_L but i only use one of them
21:01 rue_shop2 at some point I want to put an extra pulley in my drillpress to get some lower speeds
21:01 Tom_L my old one has a set of 3
21:02 Tom_L but i only use a couple of them
21:02 Tom_L center idler
21:02 Tom_L that also plays a part in the ratio
21:11 rue_shop2 :/ I dont like the idea of having to take this cable drive apart and back a few times
21:32 Tom_itx ok do i divide the large diameter by the small one to get the ratio?
21:33 Tom_itx approximately 1.23:1
21:34 Tom_itx so almost a 1:1 but not quite
21:34 rue_house 1.2300:1?
21:34 rue_house 1.2300:1.0000?
21:34 Tom_itx the big pulley is 1.121" and the small one is .908"
21:34 Tom_itx on the inner diameter
21:35 Tom_itx the OD is 1.428 on the large and 1.273 on the small
21:35 Tom_itx for an average of 1.17:1
21:35 rue_house turn it a few times
21:35 Tom_itx i'd stick with the 1.23:1 i think
21:35 Tom_itx why?
21:35 rue_house how amny revs before they lign up again
21:36 Tom_itx what are you talking about?
21:36 Tom_itx i'm talking about pulley sizes
21:36 rue_house getting th real ratio instead of the measured one
21:36 Tom_itx these aren't timing belts, just v pulleys
21:37 rue_house exactly, how do you know you shouldn't be measuring half way down the shiv?
21:37 Tom_itx i don't
21:37 Tom_itx but i measured the ID and the OD
21:37 Tom_itx it's close enough
21:37 rue_house how many degrees out is it after 1 rev?
21:37 Tom_itx it doesn't have to be exact
21:37 Tom_itx because i can control the rpm anyway
21:38 rue_house its not exact, your only to 2 decimal places now...
21:38 rue_house :)
21:38 Tom_itx close enough for this
21:38 Tom_itx now i need a large pulley with a 9/16" hole and a small pulley with a 5/16" hole with that ratio
21:39 Tom_itx and 30mm thick i think is gonna be too thick for where it goes
21:39 e_house points at toms l
21:39 Tom_itx 20 would be better
21:39 Tom_itx i know
21:39 Tom_itx it's hard to thin those pulleys though since they have a shoulder on them
21:39 rue_house I know its under that pile somewehre
21:40 Tom_itx i think those you showed me are too big a belt width
21:40 Tom_itx i don't remember what i got for my bot but those would be ok
21:41 Tom_itx i don't think i can get the right sizes in that series though
21:42 Tom_itx 3.454" between centers
21:42 Tom_itx ~87mm
21:43 Tom_itx which is fairly close to what those were
21:43 Tom_itx 90mm
21:43 Tom_itx on one
21:43 rue_house http://www.ebay.ca/itm/12864-128X64-Dots-5V-Graphic-LCD-screen-Module-LCM-Blue-Backlight-ST7920-/281431303933
21:43 rue_house could that be entertaining for a night?
21:43 Tom_itx did you just get one?
21:43 rue_house no
21:43 rue_house bit pricey
21:44 rue_house for a toy
21:44 rue_house that I dont need
21:44 Tom_itx still loading...
21:44 rue_house http://www.ebay.ca/itm/2-4-2-4-Inch-TFT-LCD-Shield-Touch-Panel-Module-TF-Micro-SD-For-Arduino-UNO-R3-/400736101126
21:44 rue_house tahts cheaper....
21:47 rue_house ok I got one peice on arm9
21:47 rue_house I'm falling asleep
21:47 rue_house but I still need to make more food
21:47 rue_house damn
21:54 Tom_itx 3mm might be ok
21:54 Tom_itx series
21:54 Tom_itx HTD series
21:54 Tom_itx depends on the hole diameters available
21:56 rue_house dude you can change the hole seize
21:57 rue_house did I show the step adapter on the pulley for the arm?
21:57 rue_house the madrill I made for the lathe was larger than the shaft I was putting the pulley on
21:58 Tom_itx i know i can change the hole size but for 9/16" i need enough pulley left for a set screw!
21:58 Tom_itx that's what i'm looking at
21:58 Tom_itx i'm not worried about changing the hole size as long as there's enough meat left on the pulley
21:58 rue_house no keyway?
21:58 Tom_itx no
21:58 rue_house keyway and a retainer nut
21:59 e_house th
21:59 Tom_itx and all the ones i'm looking at so far have a 1/4" bore
21:59 rue_house use a
21:59 Tom_itx that's not gonna leave enough meat if i drill it out to 9/16"
22:00 rue_house use a
22:00 Tom_itx i can't thread the shaft
22:00 Tom_itx i can't key it
22:00 Tom_itx the shaft is a tube
22:00 rue_house collette
22:00 rue_house use a collet
22:00 Tom_itx not enough room for it
22:00 rue_house ? what are the sizes?
22:01 rue_house dia?
22:01 Tom_itx 9/16" shaft on the spindle 5/16" shaft on the motor
22:01 rue_house ok, and the pullies?
22:01 Tom_itx need a 1.23:1 ratio
22:01 Tom_itx and can't be more than say 20mm wide
22:01 rue_house pulley diameter?
22:01 Tom_itx maybe a tad more but not much
22:01 Tom_itx about 1.4 or so on the big one
22:01 Tom_itx it can be bigger
22:02 Tom_itx both can
22:02 Tom_itx up to mayb 2"
22:02 rue_house 1.4 is enough for a collet clasp
22:02 Tom_itx no room!
22:03 rue_house http://www.google.ca/imgres?imgurl=http%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2Fd%2Fd0%2FHardingeR8Collets.jpg&imgrefurl=http%3A%2F%2Fen.wikipedia.org%2Fwiki%2FCollet&h=1362&w=1332&tbnid=NdNxUdF9fR7p4M%3A&zoom=1&docid=4LOo5ne_QW5_hM&ei=QchFVPjeEe-CigKVyICoBQ&tbm=isch&ved=0CEIQMygbMBs&iact=rc&uact=3&dur=2778&page=2&start=23&ndsp=32
22:03 rue_house ugh
22:03 rue_house http://upload.wikimedia.org/wikipedia/commons/d/d0/HardingeR8Collets.jpg
22:03 rue_house it can hang off the end of the shafts
22:03 Tom_L no it can't
22:03 Tom_L i'm telling you there's no room
22:04 Tom_L there's an encoder on the end of one
22:04 rue_house whats in the way off the end of the shaft?
22:04 rue_house ah
22:04 Tom_L http://tom-itx.ddns01.com:81/~webpage/cnc/pulley_front.jpg
22:04 Tom_L there's one i made
22:04 Tom_L i'm using the smaller diameter
22:05 Tom_L http://tom-itx.ddns01.com:81/~webpage/cnc/pulley.png
22:05 Tom_L was playing with ratios
22:05 rue_house just cause its 1:1 dosn't mean you cant use two large pullies
22:05 Tom_L i know that
22:05 Tom_L but you get a large diameter and the series is gonna be too wide
22:05 Tom_L 30mm
22:05 Tom_L or so
22:05 Tom_L 32mm
22:06 Tom_L that's marginal for the motor side
22:06 rue_house that huge pulley I have is just 10mm
22:06 Tom_L 20mm wide would be much better
22:06 Tom_L what series is it?
22:07 Tom_L i'm looking at sdp-si.com just to get the sizes
22:07 Tom_L then i'll look somewhere for price
22:07 rue_house I dunno
22:07 rue_house its from aliexpress
22:07 Tom_L https://sdp-si.com/eStore/CenterDistanceDesigner
22:07 Tom_L have a look at that
22:07 Tom_L put in the ratio and select the series belts
22:08 Tom_L center distance is 3.45"
22:08 Tom_L ratio is 1.23
22:08 Tom_L width can be about 20mm or maybe bit more
22:12 Tom_L ok a 5mm GT2 series with a 28 tooth and 36 tooth pulley with a 68 tooth belt would work if the pulleys are the right width
22:12 Tom_L .5" bore
22:12 Tom_L too big for the motor pulley
22:15 rue_house your on it
22:15 rue_house you will find it if you look long enough
22:16 Tom_L i'll likely give up before i do
22:16 Tom_L i tried once before
22:16 Tom_L you get the right width and ratio and the bores are either too big or way too small
22:17 Tom_L even with large tooth count some wouldn't work by drilling them out
23:02 Tom_L at least they let you download the part models so you can measure them at sdp
23:03 Tom_L cost is about the same as china too
23:39 Tom_itx i wonder what the difference between HTD and GT2 series is