**** BEGIN LOGGING AT Sun Nov 15 02:59:56 2020
Nov 15 04:49:16 <GenTooMan> good night
Nov 15 04:58:18 <set_> Bye for now! encode!
Nov 15 17:27:23 <GenTooMan> awake
Nov 15 17:39:13 <set_> GenTooMan: Party time?
Nov 15 17:39:42 <set_> I was reading about quadrature encoders yesterday. Interesting stuff.
Nov 15 17:40:49 <set_> I still do not understand for what reason I would need them just yet. For a particular point in space maybe?
Nov 15 17:41:22 <set_> For instance, 90 degrees stop and then start at 90 degrees?
Nov 15 17:43:45 <set_> Oh!
Nov 15 17:43:57 <set_> It creates the analog signal to binary?
Nov 15 17:46:41 <GenTooMan> quadrature encoders convert motion into a signal that can be decoded into a precise location.
Nov 15 17:47:03 <set_> Okay.
Nov 15 17:47:23 <set_> I am starting to understand. So, I can check my location on the shaft in seconds.
Nov 15 17:47:41 <set_> Literally, seconds equals time.
Nov 15 17:47:59 <GenTooMan> you need a quadrature decoder to get the count. This can be done in software, use a specialized counter or whatever.
Nov 15 17:48:25 <set_> Okay.
Nov 15 17:48:27 <GenTooMan> It's used for motion control situations where you need very small increments of precise movement often.
Nov 15 17:48:36 <set_> Oh.
Nov 15 17:48:38 <set_> Okay.
Nov 15 17:48:45 <GenTooMan> IE machining.
Nov 15 17:48:54 <set_> It is like a stepper but w/ DC motors?
Nov 15 17:49:07 <set_> Sort of?
Nov 15 17:49:10 <GenTooMan> or AC
Nov 15 17:49:15 <set_> Okay.
Nov 15 17:49:57 <GenTooMan> DC and AC motors have certain characteristics that make them better for motion control.
Nov 15 17:50:39 <set_> DC is good for smaller bots and AC for larger bots?
Nov 15 17:51:22 <GenTooMan> AC / DC tend not to get into strange resonant issues like steppers do at certain speeds using half or full step drive.
Nov 15 17:51:57 <set_> Oh. Right. Steppers act funny at times w/ high loading.
Nov 15 17:52:05 <GenTooMan> Actually DC and AC are used for large stuff and small stuff. It's all a matter of what you are trying to do and how fast. Fast movement doesn't often work well with steppers.
Nov 15 17:52:36 <set_> Right. I tried to move my steppers quickly w/ a timing.
Nov 15 17:52:47 <set_> It did not work out that well.
Nov 15 17:53:51 <set_> Like, 1 us is fine but anything under that one microsecond creates the stepper to perform badly.
Nov 15 17:54:37 <set_> .5 or less and per step, the stepper just stalls.
Nov 15 17:55:52 <set_> I wanted to blame the source i had conjured up from a bunch of trial and error and guessing but I think it is what you are describing, i.e. loudness.
Nov 15 17:56:57 <set_> Then, just like w/ the sound being loud or a piercing sound, the stepper ceases to work.
Nov 15 17:58:02 <set_> Well, I have to perform some work but the stepper works again. It is not like it just halts in existence.
Nov 15 17:58:22 <set_> It reborns itself w/ some tender love and care.
Nov 15 17:58:47 <set_> So, w/ encoders, it is basically a microstep in time?
Nov 15 17:59:28 <set_> Oh. Continuously rotating servos will fix the speed issue.
Nov 15 17:59:59 <set_> I saw some need ac drives. I am not getting into that power issue yet. i am just going to use a DC Cont. Servo.
Nov 15 18:01:49 <GenTooMan> Ok let me hit you with a bit of how these things are used in reality. Are you familiar with the paper used blowing ones nose? Facial tissue is the medical term I think.
Nov 15 18:04:51 <set_> Sure.
Nov 15 18:05:03 <set_> I blow my nose.
Nov 15 18:05:51 <set_> What are you gettin at here?
Nov 15 18:14:52 <GenTooMan> notice how thin it is?
Nov 15 18:15:10 <set_> Yes.
Nov 15 18:15:13 <GenTooMan> it's also kind of delicate.
Nov 15 18:15:17 <set_> Right.
Nov 15 18:16:26 <GenTooMan> Ok ... with 30kw motors (~50HP) ... how precisely do you think need to adjust the machine that handles that paper without it getting torn?
Nov 15 18:16:55 <set_> Very!
Nov 15 18:19:09 <GenTooMan> that's what they use big space vector controlled AC motors for. They can control the torque by milligrams moving at 40-60 meters per second.
Nov 15 18:19:36 <set_> Wozzers.
Nov 15 18:19:44 <set_> Fast and precise.
Nov 15 18:19:46 <set_> Sheesh.
Nov 15 18:20:49 <set_> Now, I do not ever think I will need such a motor but it is good info.
Nov 15 18:21:06 <set_> So, they do that w/ encoders?
Nov 15 18:25:02 <GenTooMan> they use encoders yes but they have torque sensors and pressure transducers etc. That's for making the stuff from wide rolls from the paper supplier. That's a common real world application.
Nov 15 18:25:24 <GenTooMan> Well common for big stuff anyhow. :D
Nov 15 18:25:57 <GenTooMan> You've seen and used 18650 sized batteries?
Nov 15 18:27:37 <set_> Oh.
Nov 15 18:27:41 <set_> Yes.
Nov 15 18:27:47 <set_> Batteries, I have used them.
Nov 15 18:28:07 <set_> I think the 18 series I used were not the 18650 but something different.
Nov 15 18:30:01 <GenTooMan> right those are rolled up using much smaller but precise motors control. So that's another application for motor control (non stepper).
Nov 15 18:31:16 <set_> Hmm. I never knew.
Nov 15 18:31:20 <set_> Nice.
Nov 15 18:31:50 <GenTooMan> toilet paper machine https://toilet-paper-machines.com/en/katalog-oborudovaniya/equipment/equipment-for-toilet-paper-rolls-production-expanded/
Nov 15 18:32:08 <set_> So, batteries get rolled. Wow. I really did not know. I thought they got pushed in and capped.
Nov 15 18:33:06 <GenTooMan> with 18650's they are rolled up to get the packing between layers consistent.
Nov 15 18:34:39 <set_> Oh.
Nov 15 18:34:40 <set_> Okay.
Nov 15 18:34:57 <set_> Oh.
Nov 15 18:35:04 <set_> Right...
Nov 15 18:35:15 <set_> B/c of them being LiPo or whatever.
Nov 15 18:35:48 <set_> Li-Ion.
Nov 15 18:35:50 <set_> Sorry.
Nov 15 18:36:06 <set_> I knew it was not LiPo. Sheesh.
Nov 15 18:36:53 <GenTooMan> Lithium polymer are kind of made like folding a blanket.
Nov 15 18:38:00 <set_> So, Li-Ion gets rolled and LiPo gets folded.
Nov 15 18:38:08 <set_> Ha. That just looks funny.
Nov 15 18:40:00 <GenTooMan> They have to make several thousand an hour so whatever way they can be made inexpensively and fast.
Nov 15 18:42:13 <set_> Oh. Yea. Batteries will be in high demand until dawn ends.
Nov 15 18:43:39 <set_> Battery power is a very interesting subject. I just wish those people did not take my battery book.
Nov 15 18:43:48 <set_> I had like a 600 page battery book.
Nov 15 18:46:06 <set_> I broke the BBGG.
Nov 15 18:46:18 <set_> It just gets hot now.
Nov 15 19:03:15 <GenTooMan> melt down huh?
Nov 15 19:03:38 <set_> I fixed it. It seemed there was a bad oS on it.
Nov 15 19:03:50 <set_> At least, the SD Card was bad.
Nov 15 19:07:25 <set_> I think I put something on the eMMC too. I usually do not do things like that for now.
Nov 15 19:10:08 <set_> it is all about repitition. Sort of.
Nov 15 19:12:01 <set_> under lsblk, it shows a mmcblk1p1 part and I cannot access it or erase it.
Nov 15 19:13:27 <set_> The BBGG gets hot too, i.e. just like the AI.
Nov 15 19:13:45 <set_> I can feel the heat on the processor.
Nov 15 19:16:28 <set_> https://pastebin.com/P1VsSkZU <<< see
Nov 15 19:29:32 <set_> How and should I get rid of the mmcblk1 or mmcblk1p1?
Nov 15 19:30:07 <set_> I tried w/ sudo blkdiscard but it tells me that there is not a filesystem at that location.
Nov 15 19:32:06 <set_> blkdiscard: cannot open mmcblk1: No such file or directory <<< This is the exact error.
Nov 15 20:59:07 <zmatt> you want to wipe eMMC?  sudo blkdiscard /dev/mmcblk1
Nov 15 21:18:51 <set_> What happens if if says "No such file or directory"?
Nov 15 21:19:02 <set_> I got you.
Nov 15 21:19:17 <set_> discard /dev/xxxx.xxx
Nov 15 21:19:21 <set_> Dang.
Nov 15 21:19:52 <set_> I forgot the /dev/ file directory. Dang.
Nov 15 21:19:54 <set_> Thank you.
Nov 15 21:24:12 <set_> It erased the partition. Thank you.
Nov 15 23:16:58 <set_> GenTooMan: I had the 18500 batteries from the 18 series.
Nov 15 23:17:10 <set_> Li-Ion type.
Nov 16 00:51:51 <set_> KenUnix!
Nov 16 00:51:54 <set_> I need support.
Nov 16 00:52:34 <set_> I am using pocketsphinx for digital/analog translation and receiving some bogus errors. Is anyone good w/ alsa and pulseaudio?
Nov 16 00:53:17 <set_> ad_oss.c(115): Failed to open audio device(/dev/dsp): No such file or directory <<< This is the error. It seems I need a DSP or something. Hmm. Can you help me help me?
Nov 16 02:16:04 <set_> outside of that idea, what type of connector should the BBGG take for power. It is stated 12v but what mA or ampere?
Nov 16 02:22:12 <set_> Any?
Nov 16 02:23:54 <GenTooMan> who sells the BBGood Grief?
Nov 16 02:23:57 <renrelkha> what is bbgg
Nov 16 02:28:40 <set_> Seeed Studio
Nov 16 02:28:53 <set_> They made it!
Nov 16 02:29:39 <set_> BeagleBone Green Gateway
Nov 16 02:30:45 <set_> I mean, what should i be looking at in the schematic? Should I be looking at a chip that handles the 12v input?
Nov 16 02:32:16 <william74> Hello
Nov 16 02:32:32 <william74> I am william
Nov 16 02:32:53 <william74> Nice to meet you,everyone
Nov 16 02:33:42 <set_> I am set_. I know little about 12v input and which mA needs to be applied via barrel connector.
Nov 16 02:33:55 <set_> Nice to meet you, too.
Nov 16 02:34:36 <set_> I mean. Do I need 0.25 mA since it is 12v or like 0.50 mA?
Nov 16 02:37:09 <set_> Those are rough figures. I know. I am just formulating thoughts here. Trying to get feedback before I bust the BBGG again.
Nov 16 02:39:33 <renrelkha> hello william
Nov 16 02:39:33 <william74> Are you interested in 11ax?
Nov 16 02:44:14 <renrelkha> i guess calculating the needed input current is just one of those things they expect you to know, it does not seem to be documented
Nov 16 02:44:14 <renrelkha> https://imgur.com/isAhEi9.png
Nov 16 02:44:15 <renrelkha> https://imgur.com/xkmPJzu.png
Nov 16 02:44:15 <renrelkha> or i dont know how to read it from there
Nov 16 02:44:15 <renrelkha> as in IEEE 802.11ax ?
Nov 16 02:45:17 <set_> Oh.
Nov 16 02:45:23 <set_> I will check that out now.
Nov 16 02:47:43 <set_> Buck converter. Thank you.
**** ENDING LOGGING AT Mon Nov 16 02:59:56 2020