#garfield Logs

Oct 03 2022

12:30 AM rue_shop3: 35.5mm^2
04:45 AM Tom_L: cool
11:12 AM rue_mohr: now, when does that sun break thru the trees....
01:04 PM rue_mohr: ok
01:05 PM rue_mohr: well
02:57 PM polprog: i just learnt that with the driving licence i have i can drive any agricultural tractor regardless of it's weight
02:57 PM Tom_L: you shouldn't need a license for farm equipment
02:57 PM polprog: im not sure but i think i only need it to drive on public roads
03:06 PM rue_mohr: are toll roads, technicalyl public or private?
03:07 PM Tom_L: public
03:27 PM rue_mohr: the pulley driving the belt on the Y axis is 41mm dia
03:28 PM rue_mohr: to achieve 0.1mm, what angular resoluton do I need
03:28 PM rue_mohr: circle -d 41
03:28 PM rue_mohr: Radius is : 20.500000
03:28 PM rue_mohr: Diameter is: 41.000000
03:28 PM rue_mohr: Circumfrence is : 128.805298
03:28 PM rue_mohr: Area is : 1320.254272
03:28 PM rue_mohr: Sphere area: 5281.017090
03:28 PM rue_mohr: Sphere volume: 36086.953125
03:30 PM rue_mohr: so 360 degrees is 128.8mm
03:31 PM rue_mohr: ugh cant think
03:31 PM rue_mohr: 360 degrees is 128.8mm
03:32 PM rue_mohr: so 1 degree is 0.3578mm
03:33 PM rue_mohr: so 0.1mm is .2795 degrees
03:33 PM rue_mohr: my motor is a resolution of "5 degrees"
03:34 PM rue_mohr: hahaha
03:34 PM rue_mohr: it says I only need 17;1
03:34 PM rue_mohr: well 18:1
03:39 PM rue_mohr: ---
03:39 PM rue_mohr: the X axis is 113mm
03:40 PM rue_mohr: circle -d 113
03:40 PM rue_mohr: Radius is : 56.500000
03:40 PM rue_mohr: Diameter is: 113.000000
03:40 PM rue_mohr: Circumfrence is : 354.999969
03:40 PM rue_mohr: Area is : 10028.749023
03:40 PM rue_mohr: Sphere area: 40114.996094
03:40 PM rue_mohr: Sphere volume: 755499.125000
03:41 PM rue_mohr: huh
03:42 PM rue_mohr: I must be using different numbers, I only get 50:1 for the X now
03:42 PM rue_mohr: so
03:42 PM rue_mohr: that means I should worst only need 36:1 for Y
03:43 PM rue_mohr: next on my todo is shopping
03:43 PM rue_mohr: I didn't sleep really last night ho
03:43 PM rue_mohr: tho
04:04 PM rue_mohr: I must ahve based it on 0.05mm so I had some headroom for correct for error
04:04 PM rue_mohr: I need to go grocery shopping
04:06 PM rue_mohr: and see what the auto shop has for belts
04:06 PM rue_mohr: tho, I thknk I like the flat belt idea
05:01 PM rue_mohr: ok, so, no suitable belts at the auto shop
05:27 PM rue_mohr: so this big-as-all-hell IGBT, has a saturation voltage of 2.2V
05:28 PM rue_mohr: so, 48V I'd get 45.8V to the motor
05:28 PM rue_mohr: at 20A, that would lose 40W
06:07 PM rue_mohr: the tire talc arrived
06:07 PM rue_mohr: but
06:07 PM rue_mohr: it says its hydrated magnesium silicate
06:07 PM rue_mohr: and magnesite
06:07 PM rue_mohr: irritant and toxic...
06:08 PM Tom_L: so wear gloves and a mask
06:08 PM rue_mohr: talcum, is a clay mineral, composed of hydrated magnesium silicate
06:08 PM rue_mohr: ok, so its the right stuff...
06:09 PM rue_mohr: Talc in powdered form, often combined with corn starch, is used as baby powder
06:09 PM rue_mohr: wait
06:09 PM Tom_L: there are class action law suits for tald
06:09 PM Tom_L: d
06:09 PM Tom_L: c
06:09 PM rue_mohr: so, it was always corn starch?
06:09 PM Tom_L: fucking kbd
06:09 PM rue_mohr: yea, mash it good tom
06:11 PM rue_mohr: ok, so this is what I asked for, so, is it what I want?
06:11 PM Tom_L: one cast will answer that
06:12 PM rue_mohr: In finely ground form, talc finds use as a cosmetic (talcum powder), as a lubricant, and as a filler in paper manufacture. It is used to coat the insides of inner tubes and rubber gloves during manufacture to keep the surfaces from sticking. Talcum powder, with heavy refinement, has been used in baby powder
06:12 PM rue_mohr: ...
06:13 PM rue_mohr: should I try a casting today?
06:13 PM rue_mohr: saopstone is talc
06:14 PM rue_mohr: Talc is also used as food additive or in pharmaceutical products
06:17 PM Tom_L: get on with it!
06:18 PM rue_mohr: I'm really tired
06:18 PM rue_mohr: I dont know if I actually got any sleep last night
06:18 PM rue_mohr: I think I was just lieing there all night
06:18 PM rue_mohr: I'm able to sit in my chair and not think
06:19 PM rue_mohr: but I'v determined this is talc
06:19 PM rue_mohr: did I tell you about the warnings on the shaker of garden sulfur I got?
06:19 PM rue_mohr: I'm not sure, and the menufacturer doesn't seem to know, if there is an extra pesticide in it or not
06:20 PM rue_mohr: that said, have you ever read the warnings for gasoline?
06:20 PM rue_mohr: I'm surprised some people dont wear a hazmat suit when filling up their car
06:26 PM Tom_L: sleep is over rated.. get the casting done already!
06:27 PM Tom_L: don't drink gasoline. it's not good for you
06:28 PM Tom_L: also, don't eat yellow snow
06:34 PM rue_mohr: I'll work up the sand for tommorow
08:36 PM rue_mohr: I remulled all the sand, and adjusted the water and added a bunch more fine material, and its still not packing right
08:41 PM rue_mohr: there is some kinda magic ratio for making things pack well
08:42 PM rue_mohr: it wasn't part of school, but I saw things about it
08:52 PM rue_mohr: I have some errands tommorow, I'll try packing a mold and see if it'll hold
08:53 PM rue_mohr: not gonna fire up till I'm sure
08:53 PM rue_mohr: the new tank and the propane was $100
09:39 PM Tom_L: Green sand consists of high-quality silica sand, about 10 percent bentonite clay (as the binder), 2 to 5 percent water and about 5 percent sea coal (a carbonaceous mold additive to improve casting finish).
09:43 PM Tom_L: https://www.instructables.com/Green-Sand-Formula-How-to-Make-Molding-Sand/
10:25 PM rue_mohr: HMM