#robotics Logs

Jan 23 2018

07:56 AM robotustra: ToAruShiroiNeko, do you realy watch this? https://www.youtube.com/watch?v=QHLq0yCEUts
07:40 PM Tom_itx: rue_, been tuning a bit. compare this to the last run: https://youtu.be/EqHV0Or4Ad8
07:42 PM Tom_L: it will jog faster but i see no need really.
07:52 PM rue_: todays outage was just over an hour
07:52 PM rue_: EVERY TIME I TURN ON THE CNC MACHINE THE POWER GOES OUT
08:24 PM Tom_L: rue_, did you get my message?
08:32 PM rue_: I'm going to say no
08:33 PM Tom_L: just a little more tuning on it
08:35 PM rue_: Tom_L, I think you can still get more speed out of it
08:35 PM rue_: whats the max step rate of the controller?
08:35 PM Tom_L: i can jog it quite a bit faster manually but those are the rapid parameters i have set
08:35 PM rue_: thats pretty darn good tho, dont get me wrong
08:36 PM rue_: is there acceleration?
08:36 PM rue_: looks pretty hard start/stop
08:36 PM Tom_L: it's still set at 2.5A too
08:36 PM Tom_L: and i checked the flatness of the table and it's pretty flat
08:37 PM Tom_L: i need to adjust the Z column next
08:37 PM rue_: nice
08:37 PM Tom_L: that could take a bit of time
08:37 PM rue_: how was the initial position?
08:37 PM rue_: pitched in.out?
08:37 PM Tom_L: i'm not sure, i wasn't focused on that part
08:38 PM rue_: ah, havn't attacked it at all yet then
08:38 PM Tom_L: i did run an indicator on the back edge of X though
08:38 PM Tom_L: and it's a bit crooked to the column
08:38 PM Tom_L: which i can fix
08:38 PM rue_: I found out a few days ago leveling a sacraficial bed that my new machines head it pitched in a little
08:38 PM Tom_L: yeah
08:39 PM Tom_L: even as it is, i bet it is better than my sherline
08:39 PM rue_: it was a 5/8" bit, and the difference was prolly .2mm, so it must be pretty bad
08:39 PM Tom_L: i can physically move the table on it by hand
08:39 PM Tom_L: i can't budge these axis
08:39 PM rue_: its screws are done or the bearings?
08:39 PM rue_: oh oh oh, set up a indicator and see if there is any backlash!
08:40 PM rue_: I kinda suspect there isn't
08:40 PM rue_: esp cause its all new
08:40 PM Tom_L: i don't think there is
08:40 PM rue_: :)
08:40 PM Tom_L: but i didn't put an indicator on it for that yet
08:41 PM rue_: x 0.01 zero x0.02 note, x 0.01 note
08:41 PM Tom_L: i don't plan to put numbers to it, i'll just say it's either good or bad
08:41 PM rue_: and hows the scaling look? was our math right?
08:41 PM Tom_L: someone will surely come along and say it could be better
08:41 PM Tom_L: your math was spot on
08:41 PM rue_: sweet
08:42 PM Tom_L: well, i used a ruler to check that
08:42 PM Tom_L: not a dial
08:42 PM rue_: meh
08:42 PM Tom_L: i'll get more accurate the closer it gets
08:42 PM rue_: your ball screws were usa, not china, weren't they?
08:42 PM Tom_L: chinaco
08:42 PM rue_: hmm, do they seem to run straight?
08:42 PM Tom_L: meh
08:42 PM Tom_L: fair
08:43 PM rue_: its something people have expressed concern about them to me on
08:43 PM Tom_L: it's about what i expected but a huge improvement from what i had
08:43 PM rue_: yep
08:43 PM rue_: I dont know what to do about the spindle of my old machine
08:43 PM Tom_L: and i didn't wanna pay 3x as much for them
08:43 PM rue_: I tore down the motor, tested everything and put it all back togethor, completely checks out
08:44 PM rue_: I checked the tach, it seems ok too
08:44 PM Tom_L: what's the matter with it?
08:44 PM rue_: in the last week it blew 2 power transistors
08:44 PM Tom_L: back emf?
08:44 PM rue_: transistors rated for way more than what the motor can take
08:44 PM rue_: not sure, there is a flyback diode
08:44 PM Tom_L: is it fast enough?
08:44 PM rue_: THO I was doing my flyback diodes wrong on the old days
08:44 PM rue_: yes
08:45 PM rue_: its a motor from a pathetic weed eater
08:45 PM Tom_L: it's a motor.
08:45 PM rue_: small series wound 100V
08:45 PM rue_: but it works like a champ
08:45 PM rue_: the brushes and commutator are fine after like 12 years
08:45 PM Tom_L: i'm gonna take the motor off and run the axis up and down now that i've got the motor mount clamped in place
08:46 PM Tom_L: to see how perp it is to the table
08:46 PM * rue_ nods
08:46 PM Tom_L: it's got a keyway i can check off of i think
08:46 PM rue_: Tom_L, have ideas for a first project?
08:46 PM Tom_L: not a clue
08:46 PM rue_: make something for itself
08:46 PM Tom_L: oh
08:46 PM rue_: hmm
08:47 PM Tom_L: i'm gonna make way covers for it
08:47 PM rue_: with it?
08:47 PM rue_: sheetmetal <-> ???
08:47 PM Tom_L: either neoprene sheet on something like a pull window shade rolled up
08:47 PM Tom_L: on each end
08:47 PM rue_: k
08:47 PM Tom_L: so as it goes back and forth it rolls back onto the roll
08:47 PM Tom_L: or use shimstock for the cover
08:47 PM rue_: oooh
08:48 PM rue_: clever
08:48 PM Tom_L: like 12" wide shimstock
08:48 PM Tom_L: .015"
08:48 PM Tom_L: a roller on each side of Y
08:48 PM Tom_L: i gotta go for a bit
08:48 PM Tom_L: kid's gettin off work
08:48 PM rue_: I'm waiting for my migrane to go bother someone else
08:49 PM Tom_L: it's going around today
08:49 PM rue_: hey
08:49 PM rue_: I wonder if I should get you to make some stuff for us
08:49 PM rue_: cutout some 1/8" alu
08:49 PM Tom_L: i could once it's up and running
08:49 PM Tom_L: i wanna cover the ways first
08:49 PM rue_: so, next friday :)
08:50 PM Tom_L: longer than that
08:50 PM Tom_L: i'm not gonna have the time i've had to work on it
08:50 PM Tom_L: for a while
08:50 PM Tom_L: bbiab
08:50 PM rue_: ok if I die, it was the migrane!
09:28 PM Tom_L: ok, back
09:48 PM anonnumberanon: Hhi guys
09:49 PM Tom_L: hi
09:54 PM Tom_L: huh
09:55 PM anonnumberanon: I have a migrane too :*(
09:55 PM Tom_L: https://youtu.be/EqHV0Or4Ad8
09:57 PM anonnumberanon: Well this puts a grin on my face. Thanks.
09:58 PM anonnumberanon: It sounds smooth and looks great.
09:58 PM Tom_L: heh
09:59 PM AchiestDragon: you going to use it to mill out its own t slots in the bed
10:01 PM Tom_L: i'm undecided about slots
10:01 PM Tom_L: i may do a grid of holes
10:02 PM AchiestDragon: yea slots are going to weaken it and not that good with aluminium
10:02 PM Tom_L: i will put a sacrificial plate on it for sure though
10:03 PM anonnumberanon: Its all about attachment flexibility. Kind if a matter of choice
10:03 PM Tom_L: yeah
10:03 PM AchiestDragon: yea
10:11 PM anonnumberanon: I told the girl I like to leave her bf and move out of his house.
10:12 PM anonnumberanon: Feels like i made a make or break move.
10:12 PM anonnumberanon: Scared of the potential bad consequence.
10:15 PM AchiestDragon: you fail to underestand womens logic , if you tell her to leave him she will think no i still love him , if you had told her to well you love it there dont you , she would think about it rationaly
10:17 PM AchiestDragon: its in there programming guide someware
10:23 PM AchiestDragon: that assums there talking a bout the real bf rather than the vertual bf ie the one they like people to think he is rather than what he actualy is
10:26 PM anonnumberanon: I just cant bare her sharing a bed with someone else.
10:26 PM AchiestDragon: multidimentional quantum computer systems are far easyer to understand btw
10:26 PM anonnumberanon: Heh
10:29 PM rue_: quantum, so HOW many dimensions?
10:29 PM rue_: 7? 12?
10:29 PM AchiestDragon: all of them
10:30 PM rue_: that varies deepending on who your talking to
10:30 PM rue_: do you have to actaully send someone data or do you just play the odds it will end up there on its own?
10:33 PM rue_: for that matter, can a quantum computer actually have "IO"
10:33 PM rue_: or are things in both states simotaniously
10:33 PM AchiestDragon: actualy some do say the univeres is up to 26 dimentions but by maths the mass v content (string theory and dark matter ) state aboout 6.666666..... but if the nos of dimentions is linear then the further dimentions weigh less in relative mass as dark matter so they may be an almost infinate number
10:35 PM rue_: your data will be in any point in space, given the right time
10:35 PM rue_: so "are there places my data wont be"
10:35 PM rue_: "probably not"
10:36 PM AchiestDragon: no, in quantum state the data in any point in space is instant
10:36 PM * rue_ has a whisp of smoke shoot out his ears
10:36 PM rue_: but which data is it?
10:37 PM rue_: if an alien somewhere is using a quantum computer, we should be able to capture its amazon account password
10:37 PM AchiestDragon: that is as long as theres a partical at that point in space that is able to represent it
10:37 PM rue_: with a quantum computer keylogger
10:39 PM rue_: I dont want to eat
11:16 PM tttb2 is now known as tttb