#garfield Logs

May 05 2022

04:48 AM Tom_L: .
02:42 PM Tom_L: hi
07:05 PM rue_mohr: low
07:19 PM rue_mohr: so I have a long peice of wire
07:19 PM rue_mohr: and I need to work out where the middleis
07:20 PM Tom_L: bend it in half and wind it from the center out
07:20 PM rue_mohr: loooooong
07:20 PM Tom_L: uh huh
07:20 PM Tom_L: 2 spools on the same reel
07:20 PM Tom_L: short
07:20 PM rue_mohr: but
07:21 PM Tom_L: i saw the coil
07:21 PM rue_mohr: that doesn't work
07:21 PM rue_mohr: how do I find the middle
07:21 PM rue_mohr: I suppose the yard is 300' long
07:21 PM rue_mohr: (like 60' wide)
07:21 PM Tom_L: how long do you think it is?
07:22 PM rue_mohr: it could be 100
07:22 PM Tom_L: tie the end to the front door and run around the house
07:22 PM rue_mohr: then its just wrapped around the house
07:23 PM Tom_L: but you can count
07:23 PM rue_mohr: it would help if it weren't raining
07:23 PM rue_mohr: haha
07:23 PM Tom_L: might turn the house into a flux capacitor...
07:23 PM Tom_L: it just quit here finally
07:23 PM Tom_L: looked at the rain gage and 4"
07:23 PM rue_mohr: we have a lot more in queue
07:24 PM rue_mohr: if I get it coiled I can start the next step
07:25 PM rue_mohr: I'll try running it the length of the yard
07:25 PM rue_mohr: see if I can fold it bck
07:25 PM rue_mohr: back
07:25 PM Tom_L: why do you need a center tap?
07:25 PM rue_mohr: just need to stay awake and get out of this comfy chair
07:25 PM rue_mohr: oscillator
07:26 PM rue_mohr: pushpull
07:26 PM rue_mohr: as a kid I tried to use solid iron cores on transformers and darn near burned myself
07:33 PM Tom_L: we learn.
09:14 PM rue_shop3: Tom_L,
09:15 PM rue_shop3: will that program tell you the volume of the mold?
09:15 PM Tom_L: not my cad cam
09:15 PM rue_shop3: the ID of this pipe is 1.06inches
09:15 PM Tom_L: i could import it to catia and extract it the same size and it would
09:15 PM rue_shop3: I have a max stroke of about 4"
09:16 PM rue_shop3: I just finished rewinding it...
09:16 PM Tom_L: lemme see what i can do
09:16 PM Tom_L: oh the wire?
09:16 PM rue_shop3: ok
09:17 PM rue_shop3: about 400'
09:17 PM rue_shop3: so, yea, that was ,....interesting
09:20 PM Tom_L: it will be a bit more because i'm extracting the antlers the same as the body but shouldn't be alot
09:21 PM Tom_L: 6.741 cu in
09:22 PM Tom_L: no that's wrong
09:22 PM Tom_L: x2
09:22 PM Tom_L: because i only went .125
09:22 PM Tom_L: and both halves would be .250
09:22 PM Tom_L: 13.483
09:22 PM rue_mohr: 13.482 inch ^3
09:22 PM Tom_L: :)
09:23 PM Tom_L: i extruded it to .250
09:23 PM Tom_L: so slightly less than that
09:23 PM Tom_L: because the antlers are thinnner
09:23 PM rue_mohr: that cant be right, can it?
09:23 PM Tom_L: i bet the scale is off due to mm/in
09:24 PM Tom_L: it was when i imported it to my cad so it's probably off
09:24 PM rue_mohr: that means I'd need a pipe 17" long to fill it
09:24 PM Tom_L: no
09:24 PM Tom_L: the scale is off
09:24 PM rue_mohr: ok
09:24 PM Tom_L: can you recalc the volume or should i rescale it?
09:24 PM rue_mohr: I'm going to guess its about 2inch ^3
09:24 PM Tom_L: sounds about right
09:25 PM rue_mohr: if tis mm/inch
09:25 PM rue_mohr: its 2.54x out
09:25 PM rue_mohr: no
09:25 PM rue_mohr: 6.45x
09:25 PM rue_mohr: oof, 2.09inch ^3
09:25 PM rue_mohr: huh
09:26 PM rue_mohr: so I'd need about 3" of charge in the injector
09:26 PM rue_mohr: hah, looks like we started with a max size project!
09:26 PM Tom_L: or a bigger pipe
09:26 PM rue_mohr: thats a lot of work
09:26 PM rue_mohr: cause I have a matching piston
09:27 PM rue_mohr: and a welded, machined nozzel
09:27 PM Tom_L: i forgot where scale was in catia
09:27 PM Tom_L: heh
09:27 PM Tom_L: been a while
09:27 PM Tom_L: don't get it too thick or the center won't melt
09:30 PM rue_mohr: so, I'll try this oscillator thing in a while, I need to anchor the coils I did there, and add a feedback coil
09:31 PM Tom_L: it may not let me scale it anyway since it's imported
09:33 PM Tom_L: you know, i bet the volume is smaller than that even
09:33 PM Tom_L: since i scaled it down to fit what you requested
09:33 PM Tom_L: not what the model was originally
09:33 PM Tom_L: so i'd plan on less than that
09:34 PM Tom_L: nose to toe this one is 15.9" and i scaled it so that was around 8cm
09:35 PM rue_mohr: ...
09:35 PM Tom_L: so the 2 cu in isn't accurate
09:41 PM Tom_L: ok this will be closer
09:41 PM Tom_L: can't be right...
09:41 PM Tom_L: 3.37 cu in
09:52 PM Tom_L: so maybe you bit off more than..
09:52 PM Tom_L: the thicker antlers may make up for the funnel & channels
09:53 PM Tom_L: and the 3.37 is still kindof a guess since i don't remember exactly what i scaled it to in my cad cam
09:54 PM Tom_L: but it should be in the ballpark
09:54 PM rue_mohr: ok
09:55 PM rue_mohr: oof, right up to the limit, ok
09:57 PM Tom_L: the runners shouldn't take much
09:57 PM Tom_L: .125 round
09:57 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/reindeer/mold/Reindeer_mold13.jpg
09:59 PM Tom_L: you can always make it thinner by fly cutting it
10:08 PM Tom_L: 3.39 nose to toe in the cad cam
10:13 PM Tom_L: so what's the scale between that and 15.914?
10:16 PM Tom_L: ok so i scaled it acording to what i did in the cad cam and at .250 thick it comes out to .61cu in
10:17 PM Tom_itx: Mass properties of Part2
10:17 PM Tom_itx: Configuration: Default
10:17 PM Tom_itx: Coordinate system: -- default --
10:17 PM Tom_itx: Density = 0.04 pounds per cubic inch
10:17 PM Tom_itx: Mass = 0.02 pounds
10:17 PM Tom_itx: Volume = 0.61 cubic inches
10:17 PM Tom_itx: Surface area = 9.57 square inches
10:18 PM Tom_L: so you can breath easier now
10:18 PM Tom_L: that doesn't count the corner rounding which would make it a tiny bit less
11:19 PM rue_mohr: oh
11:19 PM rue_mohr: how sure are you?
11:20 PM rue_mohr: I suppose it looks like its ok if were under 2 square inches
11:20 PM rue_mohr: cubis
11:20 PM rue_mohr: c 4 cubic inches
11:20 PM rue_mohr: 3.5ish cubic inches
11:20 PM rue_mohr: final answer.
11:21 PM Tom_L: well i scaled it to the cad model so it should be right
11:21 PM rue_mohr: ok, I'm trying to get a idea how much I"ll need to fill it
11:21 PM rue_mohr: but also if its big enough
11:21 PM Tom_L: the dimension toe to nose was the same
11:22 PM rue_mohr: ok, I think its ok
11:22 PM rue_mohr: if it works can you think of anything else you would like a lot of?
11:22 PM Tom_L: those other numbers just seemed like alot
11:22 PM Tom_L: i dunno
11:22 PM Tom_L: not off hand
11:23 PM rue_mohr: I'll start with the pla if I can
11:23 PM rue_mohr: but I have a bunch of other plastic that should go ok too
11:23 PM Tom_L: you could make some tractor tread for your bots
11:23 PM rue_mohr: abs, PC,
11:23 PM Tom_L: that's what kenneth did his for
11:23 PM rue_mohr: heh, I can 3d print tread
11:23 PM rue_mohr: was that
11:23 PM Tom_L: not as quick
11:24 PM rue_mohr: thats a LOT of aluminum machining he did
11:24 PM Tom_L: yes
11:24 PM rue_mohr: with 5 printers, I can pump out a lot of stuff
11:24 PM Tom_L: the mold may need modified too.. who knows.
11:24 PM rue_mohr: if I have them all going
11:25 PM rue_mohr: yea, I'm really interested to know if this works
11:25 PM Tom_L: i think the extremities will be the hard part
11:25 PM Tom_L: the antlers, maybe the hanging ring etc
11:25 PM rue_mohr: pla is pretty thin when its hot
11:26 PM Tom_L: you think you'll preheat the mold?
11:26 PM rue_mohr: if I'm using the press to push it in, I think it'll beok
11:26 PM rue_mohr: I dont think so
11:26 PM rue_mohr: I think it can be filled fast enough to not need it
11:27 PM rue_mohr: I wish at tech school a project had been to build an injector
11:31 PM Tom_L: then you'd have one and where's the fun in that?
11:34 PM rue_mohr: hahah the cat says "its bed time"
11:37 PM Tom_L: well it ain't wrong..
11:38 PM Tom_L: i'm headin to sleep
11:38 PM Tom_L: later