#garfield Logs

Aug 11 2020

09:30 AM polprog: rue_mohr: did you look at the aluminum blobs i posted earlier?
09:36 AM polprog: and does the CF work?
09:40 AM rue_mohr: saw the blobs, didn't get a machine to boot the cf yet
09:45 AM Tom_L: .
10:54 AM polprog: heh
10:54 AM polprog: so i ordered a dymo omega from a company that sells label printers and jazz
10:55 AM polprog: i got an email telling me to visit their webpage if i need drivers for it
10:55 AM polprog: dymo omega is a mechanical label punch :D
10:55 AM polprog: automation!
12:27 PM Tom_L: heh
05:05 PM polprog: rue_mohr: what do you think about these blobs?
05:06 PM polprog: im nagging you about this smelting stuff cause i wanna try it.. grandpa, who used to design arc smelters, said aluminum should be casted under pressure and molten in a protective atmosphere ;) and that i was better to use bronze or brass
06:33 PM rue_mohr: well you need a pot :)
06:34 PM rue_mohr: his answer is probably officially correct
06:34 PM rue_mohr: but for the things we play with, the metelergy isn't critical
06:51 PM polprog: thats what i said
06:51 PM polprog: "then its shit not aluminum"
06:51 PM polprog: idc, this is not rocket science
06:51 PM polprog: i was hacking an RF modulator
06:51 PM polprog: i think i know where the problem is.. the dots start to connect
06:52 PM polprog: no rf output <- amplifier output from IC saturated <- input video signal to IC had a weird DC offset <- offset hops in on filter
06:52 PM polprog: ill remove the filter tomorrow
06:52 PM polprog: the modulator is based on TDA8722
06:52 PM polprog: im controlling it over i2c with a buspirate
06:53 PM polprog: the aim is to mate it with AVR, but me and i2c dont go together
06:53 PM polprog: im going to sleep
07:19 PM Tom_L: may the sheep haunt you tonight
08:39 PM rue_mohr: hmm
09:07 PM rue_shop1: ok, so this digital pot is working as a 1/20 turn
09:07 PM rue_shop1: but
09:07 PM rue_shop1: maybe I should go for 10/200 turns
09:07 PM rue_shop1: then the value of its true digital comes out
09:08 PM rue_shop1: anyhow, its a software change
09:09 PM Tom_L: whats the reprap g-code for temp?
09:09 PM rue_mohr: and if its all digital like that, I can give it more complex digital control later
09:09 PM rue_mohr: hmm, not sure...
09:09 PM rue_mohr: 1 min
09:11 PM rue_mohr: M104
09:12 PM Tom_L: http://www.makeit-3d.com/wp-content/uploads/RepRapGcodeCheatSheet.pdf
09:16 PM rue_mohr: sure
09:17 PM rue_mohr: I dont write it by hand, so I'm ok
09:23 PM rue_mohr: ShopMoon, cmon, lets make a negative resistance amplifier...
11:37 PM rue_bed2: polprog, gee, thats a lot of places on your meter
11:37 PM rue_bed2: I think their cheating
11:44 PM zhanx_workshop: ok second base for new smelter is setting up
11:45 PM zhanx_workshop: cement was going bad already
11:46 PM rue_bed2: hey no concete floors for casting metal on!
11:48 PM zhanx_workshop: no i am using an old trash can
11:48 PM zhanx_workshop: will have 3-4" of perlite mix over the floor