#robotics Logs

Nov 12 2017

12:28 AM Jak_o_Shadows: Probably should figure out what speed it gets you
12:31 AM Jak_o_Shadows: It MIGHT help you make a decision
12:31 AM Jak_o_Shadows: (and is just antoher column in a spreadsheet/etc)
12:41 AM rue_shop3: I'v solved it algebraically
12:41 AM rue_shop3: your speed comes out to S
12:41 AM rue_shop3: your max force is F
12:41 AM rue_shop3: your resolution is .098thou / microstep
12:41 AM rue_shop3: :)
12:43 AM rue_shop3: ok, if I have the energy to do it, I can code up a t13 to run my zener tester
12:50 AM Jak_o_Shadows: Yeah. Need to look at all the numbers in making a decisio
12:59 AM rue_shop3: I forgot part of my goal here
12:59 AM rue_shop3: I wanted to make a current controlled motor driver, and I used a zener tester as a test case for constnat current
12:59 AM rue_shop3: the conclusion was to use a tiny13
01:00 AM rue_shop3: going back to the motor driver, the conclusion is to use a tiny13
01:00 AM Tom_L: mmm, it's gonna be a tight fit
01:00 AM Tom_L: where the y & x axis come together
01:02 AM rue_shop3: yea, thats why I want to see how you do it
01:07 AM Tom_L: i think i can straddle the 2 rail blocks
01:07 AM Tom_L: with just barely enough clearance
01:07 AM Tom_L: one | and the other --
01:08 AM Tom_L: for x & Y
01:09 AM Tom_L: doing it this way will cut down on my X travel though
01:14 AM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/XY_Rail_Mount.jpg
01:14 AM Tom_L: i might have to insert the screws in the holes for X before assembling the Y
01:14 AM Tom_L: and i moved the drive screw mounts a little too
01:14 AM Tom_L: this way will make X more stable i think
01:14 AM Tom_L: but give it less travel
01:15 AM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/XY_Rail_Mount2.jpg
01:17 AM Tom_L: should still give me 15-16" travel in X
01:18 AM Tom_L: and about 9" in Y
01:20 AM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Stepper_mounts.jpg
01:21 AM Tom_L: thinking about mounting the Z stepper parallel and above the shaft
01:21 AM Tom_L: haven't quite decided on that
01:21 AM Tom_L: i'd like to leave it the way it is and use a reduction pulley on Z at least
02:01 AM rue_shop3: make the X motor mount more ridgid, its holing the whole axis
02:01 AM rue_shop3: looks good
02:01 AM rue_shop3: well, I didn't get my time in looking for 11.11 things from china
02:34 AM Jak_o_Shadows: was that a thing? I thought it might've been a more american thing
03:59 AM edmoore: this is a lovely channel
03:59 AM edmoore: lots of good design work
05:49 AM * rue_mohr is working on a 556 based switching current controller
06:52 AM SpeedEvil: 556? Radical. Two whole 555s.
06:52 AM SpeedEvil: Isn't that a bit excessive?
06:53 AM rue_shop3: the 555/556 comparitor is tooo slow for 20Khz pwm
07:01 AM SpeedEvil: My most recent design using the 555 was a dump regulator for solar.
07:02 AM SpeedEvil: V>max, connect load for 10ms.
08:12 AM Tom_L: rue_mohr, i plan to beef up the mounts. it was just mainly for positioning
08:29 AM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/XY_Rail_Mount2.jpg
08:29 AM Tom_L: rue_mohr, better?
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12:43 PM rue_bed: yea
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07:03 PM rue_shop3: ok, write a program that manages an array of numbers
07:04 PM rue_shop3: your going to read from a device, it will issue a limited set of numbers
07:04 PM rue_shop3: as each new number comes in, add it to an array, dont have any duplicates
07:28 PM Tom_L: started programming the plate holes
07:28 PM Tom_L: 4 per side
07:33 PM rue_shop3: :)
07:33 PM rue_shop3: hand coded eh?
07:33 PM Tom_L: it's just easier to break up the tools into separate programs
07:33 PM Tom_L: no using smartcam
07:34 PM Tom_L: i'll mill the pockets for the heads since i don't have a fancy step drill
07:35 PM Tom_L: i might ask the local guy if he has a step drill
07:35 PM Tom_L: but i doubt it
07:40 PM Tom_L: how many write cycles on a PC rom?
07:40 PM Tom_L: i'm using it to switch between boot HDD
07:40 PM Tom_L: 32 & 64 bit
07:40 PM rue_shop3: 10k I think
07:41 PM Tom_L: should be ok for a while then
07:41 PM rue_shop3: the bios is battery backed up ram
07:41 PM rue_shop3: so, 1/0
07:41 PM Tom_L: ahh that's ture
07:41 PM Tom_L: true
07:42 PM Tom_L: so a few more than 10k
07:42 PM rue_shop3: by a bit
07:42 PM rue_shop3: helped with my hour counter project
07:42 PM rue_shop3: every second I update the NV
07:42 PM Tom_L: i wanna drill these but i don't know if i can trust the cad models to be accurate enough to chance it
07:43 PM Tom_L: odds of finding another 1/2" plate just the right size aren't in my favor
07:44 PM rue_shop3: I thought you were right next to manufacturing central
07:44 PM Tom_L: i am
07:44 PM rue_shop3: :-|
07:44 PM Tom_L: but it's not easy to cut that stuff with what i've got
07:44 PM Tom_L: and i found a piece nearly exactly the right size
07:48 PM rue_shop3: ah yea, I have that problem too
07:48 PM rue_shop3: you can only fit so much in the horiz bandsaw
08:23 PM rue_shop3: ok I did it
08:23 PM rue_shop3: what now rue?
08:27 PM rue_shop3: cool
08:27 PM rue_shop3: I'm detouring my screw sorter project
08:27 PM rue_shop3: sorting helper
08:27 PM rue_shop3: you tell it what you have, and it allocates a bin for it and puts it in the bin
09:10 PM rue_shop3: printf("Happening yes of an error.\n"); // when you get too deep into it, you can write chinglish too.
09:10 PM rue_shop3: but actually, thats a russian maul
09:34 PM rue_shop3: ahahha
09:34 PM rue_shop3: yesterday I got so caught up in understanding the 555 operation, I got hte circuit backwards
09:36 PM rue_shop3: I really cant beat a tiny13 for pin count
10:13 PM rue_shop3: 8-| wow, when you get the feedback the right way around, it works like a charm
10:23 PM Tom_L: almost screwed up
10:23 PM Tom_L: screw assembly mounts are different on each end
10:23 PM Tom_L: i had them the same
10:24 PM rue_shop3: :)
10:25 PM Tom_L: shouldn't change much
10:25 PM Tom_L: may need a little wider bracket on that end to mount it on
10:37 PM rue_shop3: sweet, I got a 555 to be a switching current controller
10:56 PM anonnumberanon: :3