#garfield Logs
Jun 07 2021
#garfield Calendar
04:10 PM aandrew: alrighty
04:17 PM aandrew: finally broke down and looked at the UART output
04:17 PM aandrew: ----__--------------__------
04:17 PM aandrew: from first falling edge to last rising edge is 936us
04:17 PM aandrew: that's a 9600 baud 8N1 0x7f
04:17 PM aandrew: not even parity
04:49 PM rue_mohr: N81 kinda became the norm
04:49 PM rue_mohr: what uses parity anyhow?
04:50 PM Tom_L: what's the difference between N81 and N72 ?
04:51 PM Tom_L: and why do you need 2 bits to woah the train?
04:51 PM Tom_L: https://www.kijiji.ca/v-other-business-industrial/london/first-cnc-bed-mill/1565926098
04:51 PM rue_mohr: depends if its text only
04:51 PM Tom_L: rue_mohr, go snatch it up
04:52 PM rue_mohr: and if its using xon/xoff
04:52 PM rue_mohr: ooof $800 I would
04:52 PM Tom_L: needs a serial cable
04:52 PM rue_mohr: don't even matter if I got nowhere to put it
04:53 PM Tom_L: that and you might have to bring 3phase in
04:53 PM rue_mohr: aandrew, its yours I guess
04:55 PM Tom_L: does xon/xoff take 2 bits?
04:55 PM rue_mohr: I thought for a minute that it took 8, but it might not
04:56 PM Tom_L: err bytes
04:57 PM rue_mohr: tom I doubt the motors would require 3 phase
04:57 PM rue_mohr: and it would all need to be redone anyhow
04:57 PM Tom_L: not the servos
04:58 PM rue_mohr: prolly the drivers would go
04:58 PM rue_mohr: wonder if their DC or servomotors
04:58 PM rue_mohr: er, ac servo... brushless
04:58 PM Tom_L: a mesa card would probably drive them ok
04:58 PM rue_mohr: hey bearings
05:14 PM polprog: i wonder, i could buy a second coffemaker, it only has one button
05:14 PM Tom_L: you need one with more buttons?
05:15 PM polprog: which makes it boil the water and then keep the hotplate on for 30 mins
05:15 PM Tom_L: just get a kurig
05:15 PM polprog: no, im considering using the esp8266 I bought 3 years ago to make it a web tea maker
05:15 PM Tom_L: oooo so you can share with me!
05:15 PM rue_mohr: I can give you my code as a start
05:16 PM polprog: yes
05:16 PM rue_mohr: but the element duty sensor part of the code doesn't work yet
05:16 PM polprog: youre making it on an esp8266 too right?
05:16 PM rue_mohr: it is
05:16 PM Tom_L: i should really start sorting thru these cad cam files
05:16 PM Tom_L: it's becoming a mess
05:16 PM polprog: i think it was the very first esp that hit the market
05:16 PM rue_mohr: with OTA updates, so you can reprogram it from anywhere
05:16 PM polprog: when it became hot
05:17 PM rue_mohr: its obsolete now :)
05:17 PM polprog: yeah..
05:17 PM rue_mohr: great microcontroller to network bridge tho
05:17 PM polprog: esp32 and the like
05:17 PM polprog: i never got around to it
05:17 PM rue_mohr: not so awesome for io...
05:17 PM polprog: same as with the pi zeros
05:18 PM polprog: although having two identical "coffe" makers (one unmodified for coffee, one remotely controlled for tea) in the kitchen would be weird
05:25 PM polprog: got one of the last exams tomorrow
05:25 PM polprog: gotta go to sleep
05:25 PM Tom_L: better studdy
05:27 PM rue_mohr: so
05:27 PM rue_mohr: for the inputs to the esp8266
05:28 PM rue_mohr: I was going to make them just switches on the far end, and leave the esp8266 to apply 3.3V pullups and let them be grounded out
05:28 PM rue_mohr: but its about a 140 foot wire run
05:29 PM rue_mohr: I'm thinking it might be better to have small relays at the esp8266 and send the signals up at 12V levels with enough current to drive the relays
05:29 PM Tom_L: https://www.kijiji.ca/v-other-business-industrial/london/leblond-makino-fnc40-a16-16-x-24-vertical-cnc-project/1559145924
05:29 PM Tom_L: find room for that one
05:29 PM rue_mohr: no noise issues for small signals over long run
05:30 PM rue_mohr: no thats like twice the price
05:30 PM rue_mohr: and same shipping
05:31 PM Tom_L: but it's working
05:31 PM rue_mohr: I suppose a lot of people could get rich starting with that
05:31 PM rue_mohr: too bad I'm not one of them
05:33 PM rue_mohr: yea, I'll do the relays
05:33 PM rue_mohr: I got enough spare dip relays
05:36 PM rue_mohr: I need 4 cheap bearings
05:36 PM rue_mohr: 1.5" or larger ID
05:36 PM rue_mohr: hmm
05:36 PM rue_mohr: BC bearing?
05:38 PM rue_mohr: princess auto maybe
05:44 PM rue_mohr: hahah
05:44 PM rue_mohr: 2 wheel bearings : $27
05:44 PM rue_mohr: trailer axle kit with 2 bearings, caps, etc etc etc $20
05:46 PM rue_mohr: L44610
05:48 PM rue_mohr: how about amazon
05:48 PM rue_mohr: that cant be right can it? those are only 1"?
05:50 PM Tom_L: bearings for what?
05:51 PM Tom_L: the big cnc?
05:51 PM Tom_L: you want timken bearings?
05:51 PM Tom_L: axle bearings are roller
05:51 PM rue_mohr: thats ok
05:51 PM rue_mohr: cheap cheap
05:51 PM rue_mohr: I'll fix the rest
05:52 PM rue_mohr: I cant get dimensions on that l44610 its NOT 1"
05:53 PM rue_mohr: @#$%@#$^@#$$& google fake results
05:53 PM rue_mohr: WHAT IS THE ID SIZE!!!!
05:53 PM Tom_L: https://www.vxb.com/L44649-L44610-Taper-1-0625-x1-98-x0-56-p/kit7481.htm
05:53 PM Tom_L: damn dude simmer down!
05:53 PM rue_mohr: 8 fake results!!
05:54 PM rue_mohr: what 1"???
05:54 PM rue_mohr: for a 1 ton trailer?!
05:54 PM rue_mohr: damn
05:54 PM rue_mohr: I need 1.5" min.
05:55 PM rue_mohr: 38mm
05:56 PM Tom_L: i don't get how you plan to use those
05:56 PM rue_mohr: oh oh oh
05:56 PM rue_mohr: I'll make my own shims for the shaft and my own pillow blocks
05:57 PM rue_mohr: awe damn
05:57 PM rue_mohr: https://www.amazon.ca/Trailer-Bearings-L44643-L44610-Width，12192TB/dp/B08YJW1ZQD/ref=sr_1_64
05:57 PM rue_mohr: that same on again
05:58 PM Tom_L: what are you expecting?
05:58 PM Tom_L: that last one was 1.0625 ID
05:58 PM Tom_L: not 1
05:58 PM rue_mohr: I need 1.5" inside size min (38mm)
05:59 PM rue_mohr: they all look huge on the website
06:00 PM rue_mohr: the wrecker said just go buy new ones
06:00 PM rue_mohr: not helping
06:01 PM Tom_L: https://www.vxb.com/61940MA-Radial-Ball-Bearing-Bore-Dia-p/61940-ma.htm
06:01 PM Tom_L: you want big...
06:01 PM rue_mohr: bit too big
06:01 PM rue_mohr: size and price
06:02 PM rue_mohr: https://www.amazon.ca/6806-2RS-Bearings-30x42x7mm-Limited-Applications/dp/B08CBZVPDH/ref=sr_1_195?
06:02 PM rue_mohr: what this
06:02 PM Tom_L: https://www.vxb.com/6008-Bearing-40x68x15-Open-p/kit12799.htm
06:03 PM rue_mohr: needs to be cheap
06:03 PM rue_mohr: like 4 for $40
06:03 PM Tom_L: 6 is pretty cheap
06:03 PM rue_mohr: oo
06:03 PM rue_mohr: "6008"
06:04 PM Tom_L: there is no 38mm ID bearing that i can tell
06:04 PM rue_mohr: larger is ok
06:04 PM Tom_L: https://www.vxb.com/6008-2RS-Bearing-Deep-Groove-6008-p/6008-2rsbearing.htm
06:04 PM Tom_L: sealed
06:05 PM Tom_L: https://www.vxb.com/51208-Thrust-Bearing-40x68x19-p/kit7865.htm
06:05 PM Tom_L: thrust bearing for it
06:06 PM rue_mohr: asking the local auto
06:06 PM rue_mohr: hahah!
06:07 PM rue_mohr: they have lots!
06:07 PM rue_mohr: $10ea
06:07 PM rue_mohr: which is cheaper than $6 usd
06:07 PM Tom_L: that's not 6
06:07 PM rue_mohr: its $10 cad
06:07 PM Tom_L: better get your boots on.. they close soon
06:07 PM rue_mohr: 5:30
06:07 PM rue_mohr: :)
06:07 PM rue_mohr: but yea, I'll go do that, I said $40 was fair
06:08 PM Tom_L: looks like you're set
06:09 PM Tom_L: 6010 in case you want 50mm ID
06:09 PM Tom_L: blows the budget though at $12
06:12 PM aandrew: rue_mohr: STM32 ROM bootloader uses 8E1
06:17 PM aandrew: so start = 0, 0x7f = 7 '1's and 1 '0', even parity should be '1' and stop is '1'
06:17 PM * Tom_L marks this day down.
06:18 PM * Tom_L thinks he just got rue_mohr to spend some money
06:18 PM aandrew: --- ___ --- --- --- --- --- --- --- ___ --- --- is the correct even parity waveform for 0x7f
06:19 PM aandrew: srt 0 1 2 3 4 5 6 7 par stp
06:20 PM aandrew: no par should be low for even parity
06:21 PM aandrew: --- ___ --- --- --- --- --- --- --- ___ ___ --- should be right for 0x7f with even parity
06:29 PM aandrew: no, I think the stop bit is also low
06:29 PM aandrew: --- ___ --- --- --- --- --- --- --- ___ ___ ___
06:30 PM Tom_L: https://www.best-microcontroller-projects.com/how-rs232-works.html
06:31 PM Tom_L: a few waveforms there
06:34 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1190937.jpg
06:34 PM rue_mohr: thanks tom
06:34 PM rue_mohr: its definitly over the $40 project budget now
06:35 PM rue_mohr: or, spending limit
06:35 PM rue_mohr: $20 is the budget
06:35 PM rue_mohr: I should work at it harder, get it working for $20 so the rest are upgrades (@$20 ea)
06:49 PM * Tom_L snickers a bit
06:49 PM rue_mohr: you think I waste too much time saving time and money too?
06:50 PM Tom_L: i dunno what your plans for them are yet
06:50 PM rue_mohr: there are a few things I look back on and think I should have just spent more money
06:50 PM rue_mohr: oh, for the axle that runs the X drive chains
06:50 PM Tom_L: i'm all about saving money... that's why i went to the scrap to build my cnc
06:50 PM Tom_L: but i knew what _not_ to scrimp on
06:51 PM rue_mohr: on amazon I saw linear bearings, 1m, 1pc for $1000
06:51 PM rue_mohr: came with 2 pillows
06:51 PM Tom_L: well the bearing for my bud's cnc was $1400
06:51 PM Tom_L: for the X axis screw
06:51 PM rue_mohr: so, they gave me a bit of a break on those bearings, came to less than $41 after taxes
06:52 PM Tom_L: why did they feel for you?
06:52 PM rue_mohr: and I didn't see them for less than $27 on amazon
06:52 PM rue_mohr: they know me
06:52 PM Tom_L: ahh, always good
06:53 PM Tom_L: take yer boots off now before you decide to go get more
06:53 PM rue_mohr: so I'llwork on designing shims and casting pillow blocks for them
06:54 PM rue_mohr: I'm just dozing off in the chair now
06:54 PM rue_mohr: thinking about all the things I should be doing
06:54 PM rue_mohr: the driveway pillars need a new dc-dc
06:54 PM Tom_L: i should see what size bearing that spare was that came with the washer kit
06:54 PM rue_mohr: and I dont know if I should just split it to a set of the one I'm using now (cheap china) or build one that can handle everything
06:55 PM rue_mohr: I realized on the way back that one of the ones I changed on the mill might have been a 6008
06:55 PM rue_mohr: so I might have a spare
06:58 PM Tom_L: 6307RS
06:59 PM Tom_L: 35 X 80 X 21
06:59 PM Tom_L: heavier load
07:03 PM Tom_L: what sort of pillow blocks do you need?
07:03 PM Tom_L: i can cad them up pretty easy
07:04 PM rue_mohr: Tom_L, can your software do a cnc lathe?
07:04 PM rue_mohr: I just realzed something
07:05 PM rue_mohr: oh, no material feeder, nevermind
07:05 PM Tom_L: yes but i'd need some info. i've only used it 2x
07:05 PM rue_mohr: there is a guy not far from work, I'd like to ask him cost on making some pins
07:05 PM rue_mohr: maybe 200 or so
07:06 PM Tom_L: it would be an experiment because i forget the lathe tools, front vs back cut etc
07:06 PM Tom_L: i did a part for a guy in UK once and it turned out ok
07:07 PM Tom_L: feeds n speeds would be off cause i've never set it up right
07:07 PM rue_mohr: yea no worries
07:07 PM rue_mohr: I recalled a guy has a trainer emco cnc lathe
07:07 PM rue_mohr: thats gathering dust
07:07 PM rue_mohr: but its got no material feeder
07:09 PM Tom_L: skunkworks has a few of those he's been working on
07:09 PM Tom_L: lcnc on one
07:09 PM rue_mohr: :)
07:11 PM rue_mohr: I have a basket of stuff from jameco and I dont recall if there are border issues there or not
07:12 PM rue_mohr: https://www.reddit.com/r/beneater/comments/kq1y7a/jameco_shipping_to_canada_is_a_disaster_shop/
07:12 PM rue_mohr: ah, ok
07:13 PM rue_mohr: cant quite understand the ben eater band wagon, but whatever
07:19 PM rue_mohr: oh sweet, the electronics shop in vancouver can give me some chip tubes
07:19 PM rue_mohr: which is why I was shopping jameco
07:19 PM rue_mohr: ok, I'm getting some energy back,
07:19 PM rue_mohr: the Bcomplex must be kicking in
07:20 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/pillowblock.jpg
07:21 PM Tom_L: a bit out of sorts but a start
07:32 PM rue_mohr: :)
07:33 PM rue_mohr: I need to make a template to cast and clean up on the lathe
07:33 PM rue_mohr: the feet could be a *bit* thinner :)
07:33 PM rue_mohr: I wonder if I should try 3d printing the tempate
07:34 PM rue_mohr: it would work best if I could taper the shape to come away from the sand nice,
07:34 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/pillowblock.jpg
07:34 PM rue_mohr: my cad methods dont do that nicely
07:34 PM rue_mohr: same one there tom
07:35 PM Tom_L: refresh
07:35 PM Tom_L: what changes?
07:35 PM rue_mohr: hah stupid cache
07:35 PM rue_mohr: hmm
07:35 PM rue_mohr: the inner hole should be small
07:35 PM rue_mohr: I'd hit it up on the lathe
07:35 PM Tom_L: it's 68mm with a 4mm shoulder
07:35 PM rue_mohr: somewhere between enough meat and not lots of material loss
07:36 PM rue_mohr: the casting would be kinda crude tho
07:36 PM Tom_L: oh you're casting them
07:36 PM rue_mohr: yea, I think its a good idea
07:36 PM Tom_L: so go small on the hole and you can turn your own shoulder?
07:36 PM rue_mohr: eh?
07:36 PM rue_mohr: yea
07:36 PM Tom_L: no mount holes?
07:36 PM rue_mohr: no, i'll drill 'em
07:37 PM Tom_L: need to be thicker than 19mm?
07:37 PM rue_mohr: but can you do a taper so it comes out of the sand nice?
07:37 PM rue_mohr: how about we give it 25?
07:37 PM rue_mohr: not got a lot of stress, but it is aluminum
07:38 PM Tom_L: ok done
07:38 PM Tom_L: how small on the hole?
07:38 PM rue_mohr: hmm
07:38 PM Tom_L: smaller than 68mm
07:38 PM Tom_L: but how much
07:38 PM rue_mohr: yea
07:38 PM rue_mohr: give me about 6mm or so
07:38 PM Tom_L: 60mm?
07:39 PM rue_mohr: 56?
07:39 PM Tom_L: any radius'd edges anywhere?
07:40 PM rue_mohr: yea, give 'em all
07:40 PM rue_mohr: *but*
07:40 PM Tom_L: how much?
07:40 PM rue_mohr: can you taper it so it'll come out of the sand?
07:40 PM rue_mohr: .25"?
07:40 PM Tom_L: not sure what you mean?
07:40 PM rue_mohr: ah
07:40 PM Tom_L: not really
07:40 PM rue_mohr: trying to pull the parallel edges out of the sand tears the sides
07:41 PM Tom_L: my workbenches are all screwed up on this.. having to hunt
07:41 PM rue_mohr: its best if the templates edges are tapered \---/
07:41 PM rue_mohr: heh, new version?
07:41 PM Tom_L: it has mold workbench but i've never used it
07:41 PM Tom_L: no
07:41 PM Tom_L: just been dealing with this pc a while
07:41 PM rue_mohr: interesting
07:42 PM Tom_L: what percent smaller?
07:42 PM rue_mohr: do you know what i meana about the taper?
07:42 PM rue_mohr: hah, hmm
07:42 PM Tom_L: sideways for mold release
07:42 PM rue_mohr: right the aluminum shinks
07:42 PM Tom_L: i think
07:42 PM rue_mohr: not enough to worry about tho
07:42 PM rue_mohr: I'm not sure
07:43 PM rue_mohr: if its tapered \-----/ then I can do a single-side sand press
07:43 PM rue_mohr: if its radiused (----) I can split it and do a two side impression
07:44 PM rue_mohr: its its parallel |----| the sides tear out on me when I lift the template
07:45 PM Tom_L: refresh
07:46 PM Tom_L: too much fillet?
07:46 PM Tom_L: want the 4 edges filleted too?
07:48 PM Tom_L: refresh again
07:49 PM Tom_L: you want a taper on the sides top to bottom i can do that easier
07:58 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/pillowblock/
07:58 PM Tom_L: moved it all
08:01 PM rue_mohr: oops hold on
08:01 PM rue_mohr: heh, look like too much :)
08:01 PM rue_mohr: was that .25?
08:02 PM Tom_L: yes i can fix that
08:02 PM rue_mohr: maybe .125?
08:02 PM Tom_L: one sec
08:02 PM Tom_L: done
08:02 PM rue_mohr: so, can you take the straight outter edges and cup them out?
08:02 PM rue_mohr: <rue_mohr> if its tapered \-----/ then I can do a single-side sand press
08:02 PM rue_mohr: <rue_mohr> if its radiused (----) I can split it and do a two side impression
08:02 PM rue_mohr: <rue_mohr> its its parallel |----| the sides tear out on me when I lift the template
08:02 PM rue_mohr: option b?
08:02 PM Tom_L: dunno what you mean exactly
08:03 PM Tom_L: top to bottom taper them fatter to the bottom?
08:03 PM rue_mohr: look at it down the X plane
08:03 PM rue_mohr: <rue_mohr> if its radiused (----) I can split it and do a two side impression ---> Y
08:03 PM Tom_L: it's hard to taper the thickness
08:03 PM rue_mohr: z up
08:03 PM rue_mohr: ok,
08:03 PM Tom_L: top to bottom i can easy
08:03 PM rue_mohr: or cup it?
08:03 PM Tom_L: dunno what you mean
08:04 PM rue_mohr: if you look it square on the x axis
08:04 PM rue_mohr: looks like [======]
08:04 PM rue_mohr: right?
08:05 PM Tom_L: radius better?
08:05 PM rue_mohr: well, if we can turn the striaght edges of the thickness to a radius
08:05 PM rue_mohr: so its more like (=====)
08:05 PM Tom_L: draw a sketch of what you mean
08:05 PM rue_mohr: ok
08:05 PM Tom_L: i'm not following
08:06 PM rue_mohr: the straight edges dont pull out of the sand
08:06 PM Tom_L: what about the hole?
08:06 PM Tom_L: you're not laying it sideways with 2 halves?
08:07 PM rue_mohr: I can
08:07 PM Tom_L: i need to use this cad more, i'm starting to forget
08:08 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1190938.jpg
08:08 PM rue_mohr: I dont know if that makes snse
08:09 PM Tom_L: no
08:09 PM rue_mohr: heh
08:09 PM rue_mohr: ok let me try this
08:10 PM Tom_L: you do that while i find all my icons :)
08:11 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1190938.jpg
08:11 PM rue_mohr: when I do the sand mold
08:11 PM rue_mohr: I cant pull perpendicular edges out, without the sides tearing
08:11 PM rue_mohr: which I'v marked in red there
08:12 PM rue_mohr: if the parts are rounded or tapered I should be ok
08:12 PM Tom_L: i see no red :)
08:12 PM rue_mohr: wt
08:12 PM rue_mohr: f
08:12 PM rue_mohr: ah oops, 1 sec
08:12 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1190939.jpg
08:13 PM rue_mohr: helps to copy the image off the cameara
08:13 PM Tom_L: you want the whole side radius'd?
08:13 PM rue_mohr: left it says "parting line"
08:13 PM rue_mohr: if you can
08:13 PM Tom_L: hang on a sec
08:13 PM rue_mohr: then I can pull it out of the sand
08:13 PM rue_mohr: big radius, like 2"
08:14 PM rue_mohr: it should let go, without damaging those red bits
08:14 PM Tom_L: lemme try something
08:14 PM rue_mohr: np, I'm working on a pcb for the wifi thing
08:15 PM Tom_L: i found the mold tool
08:15 PM Tom_L: i can taper it front to back so the hole is bigger on one end
08:15 PM Tom_L: that help?
08:16 PM Tom_L: probably not
08:16 PM rue_mohr: yea
08:16 PM rue_mohr: for the hole
08:17 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/pillowblock/pillowblock_draft%20angle.jpg
08:17 PM rue_mohr: I think I can change the parting line for the hole
08:17 PM rue_mohr: oh yea
08:17 PM Tom_L: added a draft angle of 5 deg
08:17 PM rue_mohr: ! instead of the radius
08:17 PM rue_mohr: yea
08:17 PM Tom_L: better?
08:18 PM rue_mohr: see then I can pull it out of the sand
08:18 PM Tom_L: may not have gotten the hole...
08:18 PM Tom_L: lemme check
08:18 PM rue_mohr: I can mill off the bottom to square it up after
08:18 PM Tom_L: the bottom is flat
08:18 PM Tom_L: i just did the sides
08:18 PM rue_mohr: ok, 1 edge can be, I think
08:18 PM Tom_L: you need the bottom too?
08:19 PM rue_mohr: it would be better
08:19 PM rue_mohr: I can have an excuse to use the milling machine :)
08:19 PM rue_mohr: which I'v only used once so far
08:19 PM Tom_L: haha i think the hole tapered the wrong way
08:21 PM rue_shop5: so my lathe can swing a 5" radius...
08:21 PM rue_shop5: whats the hole middle to that outter tip on the flange?
08:22 PM Tom_L: how wide is the base?
08:22 PM Tom_L: oh
08:22 PM Tom_L: the flange is 6.75" wide
08:22 PM Tom_L: so less than 4" swing
08:23 PM Tom_L: i think
08:23 PM Tom_L: you can do a partial print of one to get the shape then stop it
08:23 PM aandrew: hm odd
08:23 PM Tom_L: lemme draft the hole separate
08:23 PM aandrew: ok so start bit is '0' and stop bit is '1'
08:24 PM aandrew: so I'm getting an idle for even parity when transmitting 0x7f
08:24 PM rue_shop5: if I'm swinging it from the middle of the circle, will that corner clear then?
08:24 PM aandrew: and if I cahne to odd parity I get an active (0) when sendign 0x7f
08:24 PM Tom_L: i think it should
08:27 PM Tom_L: ok i got a 5deg draft on all but the bottom face
08:27 PM Tom_L: you want any radius on it now?
08:27 PM rue_shop5: no, lets go with that
08:27 PM Tom_L: i had to remove them to do the draft angle
08:28 PM Tom_L: i'll post a pic
08:28 PM rue_shop5: the taper conflicts with a radius
08:28 PM rue_shop5: cause it has to be a half mold if its tapered
08:28 PM rue_shop5: the radius means I'd have to do a 2 part mold
08:28 PM Tom_L: refresh the draft pic
08:29 PM rue_shop5: nice
08:29 PM Tom_L: any radius now?
08:29 PM rue_shop5: na
08:29 PM rue_shop5: the taper and the radius are conflicting attributes
08:30 PM Tom_L: see what that stl looks like
08:30 PM Tom_L: you'll have to move it around probably to print it
08:30 PM rue_shop5: hahahah its 25.4x too small :)
08:31 PM rue_shop5: just a sec
08:31 PM Tom_L: catia will do inch and metric on a drawing but i guess my default was inch
08:31 PM rue_shop5: the hole is the wrong way...
08:31 PM Tom_L: i don't think so
08:31 PM rue_shop5: yea
08:31 PM rue_shop5: pretend you pulling it out of playdough
08:31 PM rue_shop5: the hole locks in it
08:32 PM Tom_L: i know what you need
08:32 PM Tom_L: the large end is the back side
08:32 PM rue_shop5: a universe with 1 measurement unit?
08:32 PM Tom_L: on the outter taper and the hole
08:32 PM Tom_L: catia don't give a shit
08:32 PM rue_shop5: you wantthe kids to be able to press it into playdough and cast wax ones
08:33 PM Tom_L: ok i'll switch it
08:34 PM rue_shop5: it was supposed to rain all week
08:34 PM rue_shop5: its was sunny today
08:34 PM rue_shop5: I wonder if the rain will start up if I print this for casting
08:34 PM Tom_L: grab that stl
08:34 PM rue_shop5: I wonder if I can fit 4 in my really large box
08:35 PM Tom_L: better?
08:35 PM rue_shop5: I think thats right, the program I'm using isn't anawesome viewer
08:36 PM Tom_L: well it's an easy fix if not
08:36 PM Tom_L: is 5 deg enough or too much?
08:36 PM rue_shop5: I dunno
08:36 PM rue_shop5: I only recently gave up on perpedicular edges
08:37 PM rue_shop5: want to try a project box with tapered walls like that?
08:37 PM Tom_L: More typically, a draft angle of 1/8 in. per ft (about 1o) is used. The draft angle required on the pat- tern depends on the molding process and the depth of the pattern in the mold. In horizontally parted molds, only the vertical surfaces require draft.
08:37 PM rue_shop5: say, 3x5"?
08:38 PM Tom_L: part size?
08:38 PM rue_shop5: or a size you might like?
08:38 PM Tom_L: dunno what you're talking about
08:38 PM rue_shop5: project box
08:38 PM rue_shop5: cast aluminum
08:38 PM Tom_L: oh i mised that
08:38 PM Tom_L: i can make you one easy
08:38 PM rue_shop5: 3"x5"x1.5"
08:39 PM rue_shop5: with tapered sides?
08:39 PM Tom_L: of course
08:39 PM rue_shop5: like that
08:39 PM rue_shop5: give it a go, I can send you one?
08:39 PM rue_shop5: is there a size you might like?
08:39 PM Tom_L: i don't need any
08:39 PM rue_shop5: cover a sensor or something
08:39 PM Tom_L: she keeps buggin me.. hard to concentrate
08:40 PM rue_shop5: oh there are no hurries
08:40 PM Tom_L: how thick wall?
08:40 PM rue_shop5: how about 1/8" we can try evil
08:45 PM Tom_L: radius'd corners?
08:45 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/pendant1.jpg
08:45 PM Tom_L: like that?
08:50 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/pillowblock/projectbox.jpg
08:50 PM Tom_L: no draft angle yet
08:52 PM rue_shop5: maybe radius the outside ones
08:52 PM rue_shop5: like you got it
08:52 PM rue_shop5: but!
08:52 PM rue_shop5: cant radius the bottom
08:53 PM rue_shop5: beacuse its a pocket, casting the sand gets trickey and the bottom of the box ends up needing to be flat
08:53 PM rue_shop5: cant radius the bottom , outside
08:53 PM Tom_L: trying to figure out which way to angle what :)
08:53 PM rue_shop5: the inside can be
08:53 PM rue_shop5: :)
08:53 PM rue_shop5: looks great so far
08:53 PM rue_shop5: !
08:55 PM Tom_L: refresh
08:55 PM rue_shop5: sure
08:55 PM Tom_L: now which way to taper the sides
08:55 PM Tom_L: both inside and out?
08:55 PM rue_shop5: its a super trickey thing to cast, cause the edges are so thin
08:56 PM rue_shop5: the metal tries to set up before its all in
08:56 PM rue_shop5: yea, both in and out
08:56 PM rue_shop5: I'd see if you can keep the top at 1/8" and let the bottom get fat
08:56 PM Tom_L: outside fatter at the top or bottom?
08:56 PM Tom_L: fatter at the bottom
08:56 PM Tom_L: on the outside
08:57 PM rue_shop5: both, fatter on bottom
08:59 PM Tom_L: refresh
08:59 PM rue_shop5: yea
08:59 PM rue_shop5: will the inside walls do it too?
08:59 PM Tom_L: grab the stl
08:59 PM Tom_L: yes
09:00 PM Tom_L: both 5 deg
09:00 PM rue_shop5: nice
09:00 PM rue_shop5: ok, thought
09:00 PM rue_shop5: can you do things in the inside corners for screws?
09:01 PM rue_shop5: :)
09:01 PM rue_shop5: heh
09:01 PM Tom_L: i can do just about anything you can imagine
09:01 PM Tom_L: if you can explain it well enough
09:01 PM rue_shop5: I cant do tepering like that
09:01 PM rue_shop5: not that I'v worked out anyhow
09:04 PM Tom_L: round or square?
09:05 PM rue_shop5: round
09:05 PM Tom_L: that was 3 x 5?
09:08 PM rue_mohr: or about
09:08 PM rue_mohr: thats kinda arbitrary, I think its a good sized box
09:08 PM rue_mohr: yes?
09:09 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/pillowblock/projectbox1.jpg
09:10 PM rue_mohr: ooo!
09:10 PM rue_mohr: and use standoffs for the lid! I like it!
09:10 PM Tom_L: i suppose you need those tapered too
09:10 PM rue_mohr: thats kinda clever
09:10 PM rue_mohr: give it a try!
09:12 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/pillowblock/projectbox2.jpg
09:13 PM Tom_L: they might be a bit tall, .375
09:13 PM Tom_L: i dunno
09:13 PM rue_mohr: sounds good to me
09:13 PM rue_mohr: cool I can print one and give it a try lots later :)
09:13 PM Tom_L: grab the stl
09:14 PM Tom_L: see what you think
09:16 PM rue_mohr: stand by
09:17 PM rue_shop5: the tapers might be silly, but I'll have to try to cast it to know for sure
09:18 PM Tom_L: we can go less
09:18 PM Tom_L: pretty easy
09:18 PM Tom_L: 3 deg?
09:20 PM Tom_L: grab the 3deg stl
09:20 PM Tom_L: it's probably better
09:26 PM * Tom_L feels rue_mohr's printers will be busy for a bit
09:32 PM rue_shop5: hahah, I just realized I'm using an 80Mhz wifi controller to spit out a 10 character message if a pin goes high
09:32 PM rue_shop5: hahahaha
09:32 PM rue_shop5: oh they could have those by tommorow afternoon
09:32 PM rue_shop5: I should go start them
09:32 PM rue_shop5: no telling how many sunny days I'm gonna get
09:32 PM Tom_L: did you get the one with 3deg draft?
09:33 PM Tom_L: i think it's probably better
09:33 PM rue_shop5: yes, I'll try the 5 first tho
09:33 PM rue_shop5: I'm not awesome yet
09:34 PM Tom_L: if i added corner bosses at the top they may not cast very well
09:34 PM Tom_L: and you couldn't get the plastic out of the sand
09:36 PM rue_shop5: yea, I think running standoffs from the pcb level is brilliant
09:38 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/pillowblock/projectbox_section.jpg
09:38 PM Tom_L: that's 3 deg
09:39 PM rue_shop5: I'm not sure how it'll behave with either
09:40 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/pillowblock/projectbox_section1.jpg
09:41 PM rue_shop5: ;)
09:42 PM rue_shop5: do you remmeber about 20 years ago I got a spool of 10000 1k smt resistors?
09:42 PM Tom_L: heh
09:42 PM rue_shop5: I dont think I'v put much of a dent in it
09:42 PM rue_shop5: just chopping off another 10
09:44 PM rue_shop5: I wonder how far they take that plane grid
09:44 PM rue_shop5: in catia
09:45 PM Tom_L: a long ways
09:45 PM Tom_L: it's normally not there if my settings were right
09:46 PM Tom_L: there are parts you can't see sometimes until you zoom to them
09:47 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/pillowblock/grid.jpg
09:47 PM Tom_L: that's your pillowblock
09:47 PM Tom_L: :)
10:06 PM rue_shop5: heh
10:06 PM rue_shop5: its that small in my stl program too!
10:06 PM rue_shop5: the imperial/metic thing
10:06 PM rue_shop5: need to scale it up 25.4
10:06 PM rue_shop5: which is ok
10:07 PM rue_shop5: its a setting I can just do when printing
10:08 PM Tom_L: yeah i need a good review to remember alot of things
10:09 PM Tom_L: i got a few tool bars back i was lost without
10:09 PM Tom_L: it can do some amazing things
10:10 PM Tom_L: rather quick
10:12 PM rue_shop5: ok I ahve the wifi event pcb done up
10:12 PM rue_shop5: didn't use relays, I used optos
10:12 PM Tom_L: nice
10:12 PM rue_shop5: with a loading resistor
10:13 PM rue_shop5: try to make sure any line noise cant cause false signals
10:15 PM Tom_L: you finally figure out the right sand mix for casting?
10:22 PM rue_mohr: its been working ok
10:23 PM rue_mohr: getting the water right is a bit fun
10:23 PM rue_mohr: and I need to use finer sand than I initially expected
10:23 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1190945.jpg
10:26 PM Tom_L: fancy
10:27 PM rue_mohr: its fed 12V and given 12V signalling
10:27 PM rue_mohr: I tested the draw of a relay, matched it
10:27 PM Tom_L: what kindof distance will it tx rx?
10:28 PM rue_mohr: never range tested it
10:29 PM rue_mohr: the coffeemaker works from the kitchen and thats like 50feet of wood walls
10:30 PM Tom_L: maybe eventually you want some mounting tabs on the outside of those boxes
10:35 PM Tom_L: ok going for system shutdown...
10:35 PM Tom_L: later
10:35 PM rue_mohr: huh
10:35 PM rue_mohr: good idea
10:35 PM rue_mohr: tabs
10:35 PM Tom_L: i shut it off or i'd add them
10:36 PM Tom_L: see if it works first
10:36 PM Tom_L: i'd try the 3 deg one personally
10:36 PM Tom_L: but what do i know... i've never cast anything
10:54 PM rue_mohr: yep
10:54 PM rue_mohr: hopefully I can do lots of casting this summer