#garfield Logs
Sep 01 2019
#garfield Calendar
12:10 AM zhanx: wow so happy i got real internet again i don't know where to start
02:12 AM rue_mohr: zhanx, did you make an instructable?
02:13 AM rue_mohr: I think they always feature every entry
02:13 AM zhanx: no
02:13 AM zhanx: due to internets
02:13 AM rue_mohr: and give people a free 3 month premium
02:13 AM rue_mohr: cause I think they want people to generate 1 article every 3 months
02:14 AM zhanx: have got the premium before for correcting issues
02:14 AM rue_mohr: which implies they figure an author base of about 90 people
02:14 AM rue_mohr: like amazon prime, free shipping,.... that you would get anyway
02:14 AM zhanx: hold on need to save and close
02:15 AM zhanx: ok so the base and walls are done with the inlet and outlets
02:15 AM rue_mohr: ok
02:16 AM zhanx: but need a "guide" wall, but don't think i need it
02:16 AM zhanx: this now weighs in at about 4400 pounds
02:17 AM zhanx: dang it Gillibrand dropped out
02:18 AM zhanx: minus her gun issues she was sane
02:18 AM zhanx: and her gun control stuff would have never passed
02:24 AM rue_mohr: oh is it political season again?
02:24 AM zhanx: yep
02:25 AM zhanx: and really the one that would have won was tossed out. its sad
02:26 AM zhanx: rue_mohr, its political season 24/7 these days here
03:05 AM rue_mohr: https://www.flickr.com/photos/queenslandstatearchives/46296158552/in/album-72157709973891756/
03:05 AM rue_mohr: heh
03:07 AM zhanx: old school
03:07 AM rue_mohr: very
03:08 AM rue_mohr: its just a notch over being amachine that drags itself around
03:52 AM rue_mohr: brb
04:43 AM rue_bed: hmm, wild changes in my bedtimes
10:51 AM rue_mohr: CLK, MREQ, M1, RD, WR, A0, A1, A4.
11:02 AM Tom_L: what's he gonna do with it when it's done?
11:24 AM rue_mohr: no idea
11:25 AM rue_mohr: he wanted to make an accurate replacement for retro repair
03:50 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1130695.jpg
03:50 PM rue_mohr: how many projects is it ok to work on at once again?
04:03 PM rue_mohr: :06000000EDA1C3000000A9
04:03 PM rue_mohr: :00000001FF
04:11 PM Tom_L: one
04:11 PM Tom_L: you sure that's wide enough?
04:13 PM rue_shop1: sherline design style
04:20 PM Tom_L: the width will give you more rigidity
04:21 PM Tom_L: it should work ok though
04:22 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Channel_design.jpg
04:22 PM Tom_L: i had a similar plan once
04:22 PM rue_mohr: the material I have for the boxbeam is narrower than that tho
04:23 PM rue_mohr: the winter me begged the summer me to weld that up
04:23 PM Tom_L: yeah, i kinda re'designed as i went for that reason too
04:23 PM rue_mohr: I'd like to put the stepper at the back like you have it, I wonder if I have a peice of box thick enough
04:24 PM rue_mohr: then again, how could I possibly end up as bad as that sherline
04:24 PM Tom_L: my steppers are big enough i doubt i needed the reduction
04:24 PM rue_mohr: how did they get away with doing the verticle like that!!!!
04:24 PM Tom_L: 3:1
04:24 PM Tom_L: i have pulleys and belts to do 2:1 as well
04:24 PM Tom_L: but i doubt i change it now
04:24 PM rue_mohr: hmm
04:25 PM rue_mohr: what if I just pull the motor out via drive belt
04:25 PM Tom_L: ?
04:25 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Column_Design2.jpg
04:25 PM rue_mohr: put the motor elsewehre and just get in there for the drivebelt
04:25 PM Tom_L: that actually worked out real well i just wish it was taller
04:26 PM Tom_L: mine is belt driven
04:26 PM rue_mohr: Y
04:26 PM rue_mohr: your Y is direcct, right?
04:26 PM Tom_L: at first i was gonna put it inside the column but tuned out to not be enough room
04:26 PM Tom_L: yes
04:27 PM rue_mohr: instead of putting the motor w/direct at the back, I take a belt off it and put the motor to the side
04:27 PM rue_mohr: that all said, I have a snag
04:27 PM rue_mohr: I cant drive... er, I can...
04:27 PM rue_mohr: I was gonna say the boxbeam is in the way of the leadscrew
04:28 PM rue_mohr: but I just put the leadscrew over the beam
04:28 PM rue_mohr: box ways
04:28 PM rue_mohr: I have some cold rolled to make them from
04:33 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/Y_Axis_install.jpg
04:33 PM Tom_L: Y is under the Z plate
04:33 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/Y_Motormount1.jpg
04:33 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/Y_Motormount2.jpg
04:34 PM Tom_L: i hesitated to weld the mount but it's aligned real good
04:38 PM rue_mohr: my trick is to pull it all off without those bearings
07:21 PM rue_mohr: I'm not sure if the whole head standout should slide up and down like yours, or just a fixed arm with a head on the end that moves up and down
07:22 PM Tom_L: explain
07:23 PM rue_mohr: the head has to stand out from the column
07:23 PM rue_mohr: ideally by Y/2
07:23 PM rue_mohr: that stand-out can move up and down, or the z can be on the end of the standout
07:23 PM Tom_L: doesn't quite work that way
07:24 PM rue_mohr: can
07:24 PM Tom_L: well maybe
07:24 PM rue_mohr: the second of the ideas just has a more limited range
07:24 PM rue_mohr: yours has the best range, with the most force on the slider
07:24 PM Tom_L: i got way more Y than i need but i'll keep it just the same
07:25 PM Tom_L: 4 sliders pretty well take care of that
07:26 PM Tom_L: there's likely some bend in z but that's pretty much over the whole thing not just one component
07:28 PM Tom_L: i'm not trying to hold micron tolerance
07:31 PM Tom_L: i don't think either of your ideas has an advantage over the other as far as rigidity
07:34 PM Tom_L: the problem you will find with the fixed arm with the head on the end is clearance
07:34 PM Tom_L: your Z slide will get in the way of your work
07:34 PM Tom_L: i actually considered that early on
07:35 PM Tom_L: then i realized i'd have the same problem i had with the sherline model i have with the arm hitting the vise sometimes
07:35 PM Tom_L: a real pisser when you're almost done with a part...
07:41 PM Tom_L: i think you will find you want the whole thing to slide
08:11 PM rue_shop1: me too
08:11 PM rue_shop1: I think the z being on the end of the arm would limit its motion too much
08:40 PM rue_shop1: ok I need a water timer
08:40 PM rue_shop1: and
08:40 PM rue_shop1: a hole cut in a cast box
08:53 PM rue_shop1: water time
08:53 PM rue_shop1: r
08:54 PM Tom_L: i based my design loosely on commercial vmc's
09:14 PM rue_shop1: did you ever take your robots to compete?
09:19 PM rue_shop1: would you like to enguage in a mystery?
09:19 PM Tom_L: the sumo i did just at our local group back then
09:20 PM Tom_L: (3-4) of us
09:20 PM Tom_L: maybe the wall follower (balance bot)
09:21 PM Tom_L: what mystery
09:21 PM Tom_L: couldn't tell you where any of them are today except one and he's dead
09:52 PM rue_shop1: well
09:52 PM rue_shop1: the hd44780 screens
09:52 PM rue_shop1: the current ones
09:53 PM rue_shop1: dont use 44780 chips
09:53 PM rue_shop1: they use a knockoff
09:53 PM rue_shop1: and that knockoff supports 3 wire serial transfers
09:58 PM Tom_L: i've got a couple that use an oddball chip i think
09:58 PM Tom_L: the timing or something (i forget exactly) was a little different than the real ones
10:00 PM Tom_L: I2C?
10:01 PM Tom_L: i got a serial to lcd board ya know...
10:05 PM rue_shop1: shifted serial
10:05 PM rue_shop1: clk data select
10:05 PM rue_shop1: I'm tied up, would you like to dig around a bit?
10:06 PM Tom_L: i'm just gonna kick back i think
10:08 PM Tom_L: https://hackaday.com/2011/04/07/shift-register-is-all-it-takes-to-make-a-3-wire-serial-lcd/
10:09 PM rue_shop1: no no no
10:09 PM rue_shop1: thats why this will be hard
10:09 PM rue_shop1: casue people made that
10:09 PM rue_shop1: the chip actually used today, has the serial built in
10:09 PM rue_shop1: its like the 4 bit mode
10:09 PM rue_shop1: you use some of the bits as clk/data and it works as serial
10:10 PM Tom_L: i usually use them all in 4bit mode anyway since they're a slow device regardless
10:10 PM rue_shop1: but we could just be using them in serial
10:10 PM Tom_L: i doubt i have any
10:10 PM rue_shop1: if they aren't genuine 44780, they probably support serial
10:12 PM Tom_L: what mfg makes the chip?
10:12 PM rue_shop1: this is where the digging starts
10:12 PM rue_shop1: I'm just trying to see if I left myself a note when I found one of the controllers
10:12 PM Tom_L: not something i've ever heard of
10:12 PM rue_shop1: only I have
10:14 PM Tom_L: https://sourceforge.net/p/lcdproc/discussion/312/thread/00298b2f/
10:15 PM Tom_L: maybe not
10:16 PM rue_shop1: sounds like they stuck an i2c o/p module on it
10:16 PM Tom_L: https://forum.arduino.cc/index.php?topic=22320.0
10:17 PM Tom_L: maybe not either
10:17 PM Tom_L: but it is a knockoff
10:17 PM rue_shop1: I checked the 0066 datasheet, it doesn't mention the serial
10:20 PM Tom_L: ftp://ftp.jameco.com/Archive/Current-TechDocuments/141559.pdf
10:20 PM rue_shop1: no
10:20 PM rue_shop1: there are no chips required to do this
10:21 PM rue_shop1: the existing pins on the lcd have alternate functions as serial lines
10:22 PM Tom_L: https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=17&cad=rja&uact=8&ved=2ahUKEwjctqzvlbHkAhVLb60KHRAkA444ChAWMAZ6BAgGEAI&url=https%3A%2F%2Fwww.areasx.com%2Findex.php%3FD%3D1%26page%3Ddownload.php%26idfile%3D30%26todo%3Ddownloadfile%26view%3Ddownload&usg=AOvVaw3tnCosMZUBQZU9lG5G_ZJv
10:22 PM Tom_L: link may not work
10:22 PM rue_shop1: the existance of the serial converters is what messes up the search
10:22 PM Tom_L: look at that pdf
10:23 PM rue_shop1: its not baud based
10:23 PM Tom_L: no it's an add on
10:23 PM rue_shop1: its clock and data
10:26 PM rue_shop1: oo
10:26 PM rue_shop1: HD66712
10:27 PM rue_shop1: serial in is r/w
10:27 PM rue_shop1: serial out is d0
10:28 PM rue_shop1: clk is e
10:28 PM Tom_L: https://www.lcd-module.de/eng/pdf/zubehoer/hd66712u.pdf
10:28 PM rue_shop1: dont see the serial spec in it tho
10:28 PM rue_shop1: bit order
10:29 PM Tom_L: Bus interface
10:29 PM Tom_L: 4 bits/8 bits
10:29 PM Tom_L: 4 bits/8 bits
10:29 PM Tom_L: Serial;
10:29 PM Tom_L: 4 bits/8 bits
10:29 PM Tom_L: IM
10:30 PM rue_shop1: aha
10:30 PM rue_shop1: page 38
10:30 PM Tom_L: Selects interface mode with the MPU;
10:30 PM Tom_L: Low: Serial mode
10:30 PM Tom_L: High: 4-bit/8-bit bus mode
10:30 PM rue_shop1: oh, which pin?
10:30 PM Tom_L: P12
10:30 PM Tom_L: not sure
10:31 PM Tom_L: explains the pin functions
10:32 PM Tom_L: Item
10:32 PM Tom_L: HD66702
10:32 PM Tom_L: HD66710
10:32 PM Tom_L: HD66712S
10:32 PM Tom_L: HD66712U
10:32 PM Tom_L: variants
10:33 PM rue_shop1: ok, so, the next step is to code it up and start testing it on all sorts of screens
10:33 PM Tom_L: P8 pad coordinates
10:34 PM Tom_L: 9 pinout
10:34 PM Tom_L: P11 labelled pinout
10:35 PM rue_shop1: oh
10:35 PM rue_shop1: oooh
10:35 PM rue_shop1: IM
10:36 PM rue_shop1: ok, thats a snag
10:36 PM Tom_L: mode select
10:36 PM rue_shop1: casue these are all blob-top
10:36 PM rue_shop1: so you cant get at that to ground it
10:36 PM Tom_L: well....
10:37 PM rue_shop1: ok, well
10:37 PM rue_shop1: dead end
10:38 PM rue_shop1: I accidently stepped on a wasp, and as it was being squished it stung the bottom of my foot :(
10:38 PM Tom_L: they're vengeful
10:39 PM Tom_L: so
10:39 PM Tom_L: should i save this pdf so when you lost it i'll have it?
10:39 PM zhanx: ok that was a long call out
10:40 PM zhanx: just got home
10:41 PM rue_shop1: :)
10:41 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/LCD/
10:42 PM Tom_L: dunno what the rest of that is but it's there
10:42 PM zhanx: sunday afternoon on a holiday weekend
10:42 PM Tom_L: should pay good
10:43 PM zhanx: not complaining that is for sure