#linuxcnc Logs

Jul 07 2024

12:04 AM lcnc-relay: <ffffrf> wierd my linuxcnc is capping me at 500 steps per revolution, and when i change my steps/rev on the driver side it does not change anything in linuxcnc - is there some native limitation for this?
12:16 AM lcnc-relay: <ffffrf> like it only works with 200 motor steps per rev and no microsteps lol
12:18 AM lcnc-relay: <ffffrf> maybe i jiggled something and it started working
12:20 AM pcw---home: The final calculated scale will be (steps/rev = 200*microstep ratio) / leadscrew pitch (for direct drive leadscrews)
12:27 AM lcnc-relay: <ffffrf> ok i got it all working correctly
12:27 AM lcnc-relay: <ffffrf> with high scale, meaning the driver switches to change the revs is working
12:27 AM lcnc-relay: <ffffrf> my next goal will be to figure out how to control the sherline spindle with the mesa board
12:28 AM lcnc-relay: <ffffrf> some say you need like a digital pwm to potentiometer converting board thing but i read elsehwere you can just use pwm
12:29 AM lcnc-relay: <ffffrf> http://store.mesanet.com/index.php?route=product/product&product_id=205
12:29 AM lcnc-relay: <ffffrf> something like this i read
12:32 AM lcnc-relay: <ffffrf> oh perfect it uses a potentiometer for certain so i just need to convert pwm to voltage
12:38 AM pcw---home: bbl
02:07 AM Deejay: moin
04:53 AM Tom_L: morning
06:07 AM JT-Mobile: morning
06:34 AM JT-Mobile: Tom_L, you and capt got rtai working?
07:41 AM Tom_L: JT-Mobile, yes but
07:41 AM Tom_L: flex still freezes the pc
07:41 AM Tom_L: a little better latency than the last RTAI
08:06 AM lcnc-relay: <JT> Does dmesg say anything
08:08 AM lcnc-relay: <fianna_eng> Can I jog off a hard limit switch when unhomed and the axis is in a homing sequence?
08:08 AM lcnc-relay: <fianna_eng> Ignore limits checked, but it won't let me jog an unhomed sequenced joint
08:15 AM Tom_L: JT i didn't look last night
08:15 AM lcnc-relay: <JT> Ok
08:15 AM lcnc-relay: <JT> Breakfast time then ease on home
08:16 AM Tom_L: i'm goin out to get the D525 to try it on
08:16 AM lcnc-relay: <JT> Ok
08:20 AM lcnc-relay: <JT> Both of my D525s are dead
08:23 AM Tom_L: i posted the dark rpi theme on the forum
08:24 AM lcnc-relay: <JT> Cool
08:24 AM -!- #linuxcnc mode set to +v by ChanServ
08:26 AM Tom_dev: http://paste.debian.net/1322599/
08:28 AM Tom_L: from an empty dmesg
08:28 AM Tom_L: at least on the D525 it didn't freeze the pc
08:34 AM Tom_dev: captain, http://paste.debian.net/1322600/
08:35 AM Tom_dev: http://paste.debian.net/1322601/
08:36 AM Tom_dev: it ran once from a terminal
08:36 AM Tom_dev: with latency-histogram --nobase it jumped to 35 right away
08:37 AM Tom_dev: axis sim still runs
08:43 AM Tom_L: http://tom-itx.no-ip.biz:443/~webpage/cnc/RTAI_TEST/D525_newRTAI_histogram.png
08:43 AM Tom_L: D525 result
08:43 AM Tom_L: http://tom-itx.no-ip.biz:443/~webpage/cnc/RTAI_TEST/RTAI_D525_bookworm.png
08:43 AM Tom_L: previous RTAI same MB
08:49 AM Tom_L: http://tom-itx.no-ip.biz:443/~webpage/cnc/RTAI_TEST/D525_newRTAI_histogram_both.png
08:49 AM Tom_L: odd when you run base with servo
08:49 AM Tom_L: same conditions
08:49 AM Tom_L: same et
08:50 AM Tom_L: somebody's lying
09:49 AM _unreal_: I am in the processes of clearing out my fathers office. I have come across a bunch of serial and parallel/printer cables 25' long
09:49 AM _unreal_: I have a bunch. does anyone have any interest in these cable? if not I'm going to scrap them
09:50 AM _unreal_: My father was a horder
09:50 AM _unreal_: I have no use for them
10:03 AM roycroft: take them to the goodwill
10:04 AM * roycroft just came up with a cunning plan to get dust extraction and compressed air to his new shop temporarily
10:05 AM roycroft: first i have to get the compressor and extractor to the new shop - i don't have long enough extension cords/hoses to reach eugene
10:13 AM _unreal_: last place I'm going to bring the cables is goodwill
10:13 AM _unreal_: if I any thing them. its scrap metal
10:40 AM rdtsc: Have one of those 20V battery packs for handheld tools with a "test" button on it, used once. Press the button, and some LEDs light up. Well it has starting lighting up without the button being pressed.
10:40 AM rdtsc: So take the cover off and there is a tiny circuit board with a tiny tactile switch on it. Breathing on it causes it to register as a "touch."
10:41 AM rdtsc: The switch is maybe 5x5mm, very thin, and surface-mount. Repair isn't what it once was, lol
11:09 AM rdtsc: Couldn't see anything visibly wrong with it, very clean, so gently scrubbed with IPA, blew dry, and reassembled. So far, seems to be working as expected. Could have been some tiny contaminant from manufacture.
11:10 AM rdtsc: Or even no-clean-flux contamination... seen that short things out before.
12:35 PM lcnc-relay: <captainhindsight_.> Tom_L: try isolcpus=1 on the D525
12:37 PM Tom_L: why the difference in the 2 tests
12:38 PM lcnc-relay: <captainhindsight_.> 6 months apart, the planets are in different arrangements
12:39 PM Tom_L: no between regular and --nobase
12:39 PM lcnc-relay: <captainhindsight_.> same bios settings?
12:39 PM Tom_L: within 5 min of each other
12:39 PM lcnc-relay: <captainhindsight_.> ah the servo thread only vs the others
12:40 PM Tom_L: http://tom-itx.no-ip.biz:443/~webpage/cnc/RTAI_TEST/D525_newRTAI_histogram.png
12:40 PM Tom_L: http://tom-itx.no-ip.biz:443/~webpage/cnc/RTAI_TEST/D525_newRTAI_histogram_both.png
12:40 PM Tom_L: that's nuts
12:40 PM lcnc-relay: <captainhindsight_.> the base thread keeps the cpu busier
12:41 PM lcnc-relay: <captainhindsight_.> real time fights against all the power saving and guess what the cpu should do next stuff
12:42 PM lcnc-relay: <captainhindsight_.> the servo thread with no base thread will probably settle down if the cpu is kept busy
12:45 PM lcnc-relay: <captainhindsight_.> I think that the latency test requires some reexamination, it's in the ballpark but not entirely accurate
12:46 PM Tom_L: as pointed out
12:47 PM Tom_L: either way flex (qtpy) doesn't get along with it
12:47 PM lcnc-relay: <captainhindsight_.> I ran a latency test the other day overnight and it never went over 18uS yet if any value under 40uS was used as a base thread it would generate real time errors
12:48 PM lcnc-relay: <captainhindsight_.> 18uS + 15uS = 33uS, even using 35uS as base would immediately generate a real time error when Axis started
12:49 PM xxcoder: dont lcnc have base cycle that things cant be faser than
12:50 PM Tom_L: SERVO_PERIOD
12:50 PM Tom_L: or BASE
12:50 PM Tom_L: if you're not using mesa cards
12:51 PM lcnc-relay: <captainhindsight_.> https://wiki.linuxcnc.org/cgi-bin/wiki.pl?TweakingSoftwareStepGeneration
12:51 PM Tom_L: wow, ff blocked that
12:53 PM lcnc-relay: <captainhindsight_.> yes the certs expired recently
12:54 PM lcnc-relay: <captainhindsight_.> our website admin should be notified of the issue 🙂
12:55 PM xxcoder: nice page
12:57 PM Tom_L: and who would that be?
12:57 PM lcnc-relay: <captainhindsight_.> not Jepler
12:58 PM lcnc-relay: <captainhindsight_.> he wouldn't walk away without a replacement
12:58 PM lcnc-relay: <captainhindsight_.> take the security risk
12:59 PM lcnc-relay: <captainhindsight_.> in FF
01:08 PM lcnc-relay: <captainhindsight_.> for the past decade or two the discussions over who has the admin passwords has always been in the shadows
01:42 PM -!- #linuxcnc mode set to +v by ChanServ
02:00 PM Tom_L: i can tell you it's not me
02:13 PM lcnc-relay: <captainhindsight_.> you don't whine enough to be in charge
02:14 PM xxcoder: man it sometimes seems that yt projects videos is 90% about making new tools lol
02:15 PM lcnc-relay: <captainhindsight_.> https://www.youtube.com/watch?v=HZwUm9RlLvU made with LCNC
02:15 PM lcnc-relay: <captainhindsight_.> and for cheap
02:24 PM lcnc-relay: <captainhindsight_.> https://www.youtube.com/watch?v=VBbKYrHZ5sA I have to fix one of these that is already converted to CNC
02:26 PM lcnc-relay: <captainhindsight_.> I think Centroid or UCcnc is currently on it
02:26 PM lcnc-relay: <captainhindsight_.> the saddle currently racks as you move back and forth
02:29 PM lcnc-relay: <captainhindsight_.> the mill spindle and the lathe spindle only run one at a time, guess I have to move the mill head onto its own ZY platform for simultaneous operation
02:40 PM Tom_L: take a blow torch and cut the shaft
02:41 PM Tom_L: xxcoder, yt projects are about facetime
02:42 PM xxcoder: lol pretty lot of channels I watch, guy dont show face much, if at all
02:42 PM xxcoder: but yeah
02:43 PM JT-Shop: Tom_L, did you get emc to run with rtai yet?
02:43 PM Tom_L: it runs but flex locks it up
02:44 PM Tom_L: after the 12 install it's about a 3 min process
02:45 PM Tom_L: i posted a dmesg on it
02:45 PM Tom_L: on paste.debian
02:45 PM JT-Shop: which debs did you use?
02:46 PM * Tom_L boots the other pc
02:46 PM lcnc-relay: <captainhindsight_.> the working debs 🙂
02:47 PM Tom_L: http://tom-itx.no-ip.biz:443/~webpage/cnc/NTULINUX/CAPN_FILES/
02:47 PM Tom_L: that's my copy
02:47 PM Tom_L: getting the link to blame for it all....
02:47 PM lcnc-relay: <captainhindsight_.> where the RTAI kernel matches the RTAI LCNC version, they HAVE to be built against each other in order to work
02:48 PM lcnc-relay: <captainhindsight_.> https://onelaboratories.us/rtai_lcnc/ matching RTAI kernels and LCNC
02:48 PM Tom_L: yeah that guy
02:48 PM Tom_L: he's to blame
02:49 PM lcnc-relay: <captainhindsight_.> now you just have to fix flex
02:50 PM Tom_L: would help if i could get this fckin pc to boot
02:51 PM -!- #linuxcnc mode set to +v by ChanServ
02:51 PM lcnc-relay: <captainhindsight_.> i spent the last few days tweaking the hell out of junk PC's
02:52 PM lcnc-relay: <captainhindsight_.> but that is what makerspaces have
02:52 PM Tom_dev: JT-Shop, http://paste.debian.net/1322599/
02:52 PM Tom_L: is the crash report
02:53 PM lcnc-relay: <captainhindsight_.> in spirit they did buy/end up with used PC's with CPU's that usually have good latency scores, however the BIOS's on some were too broken to be useful even with servo threads
02:54 PM JT-Shop: line 8 seems to be where it starts with a error
02:55 PM JT-Shop: I'll have to try again in the morning
02:55 PM Tom_dev: yup
02:55 PM Tom_dev: maybe not much you can do about malloc
02:56 PM Tom_dev: that's pretty internal
03:01 PM -!- #linuxcnc mode set to +v by ChanServ
03:01 PM Tom_dev: https://www.rtai.org/userfiles/documentation/magma/html/api/group__shm.html
03:01 PM Tom_dev: doubt that will help anybody but..
03:04 PM Tom_L: i doubt isolcpus would have anything to do with that
03:07 PM lcnc-relay: <captainhindsight_.> I'll ask the RTAI dev
03:08 PM -!- #linuxcnc mode set to +v by ChanServ
03:16 PM rdtsc is now known as rdtsc_away
03:16 PM Tom_L: ok with isolcpus=2,3 i get a steady 7.9 on the i5
03:17 PM Tom_L: JT-Shop, doing the isolcpus=2,3 allowed flex to start up
03:18 PM Tom_L: on the i5 pc
03:18 PM JT-Shop: cool
03:18 PM Tom_L: i'll go grab the d525
03:19 PM Tom_L: i can set that one to 1
03:19 PM Tom_L: you may wanna keep a note on that :)
03:19 PM Tom_L: that's with this new RTAI build from yesterday
03:30 PM lcnc-relay: <captainhindsight_.> nope he never saw that issue before with RTAI
03:31 PM Tom_L: isolcpus=1 worked on the D525 with flex too
03:31 PM Tom_L: so now we know about that
03:31 PM JT-Shop: nice
03:33 PM Tom_L: ~3.9uS so far on the servo thread
03:33 PM Tom_L: 4.2
03:33 PM Tom_L: it's going up a bit but not alot
03:33 PM lcnc-relay: <captainhindsight_.> update me in about 4+ more hours
03:34 PM -!- #linuxcnc mode set to +v by ChanServ
03:34 PM lcnc-relay: <captainhindsight_.> all the latency spikes happen when you are not looking after at least 30 minutes
03:34 PM lcnc-relay: <captainhindsight_.> the quick and dirty test is open FF and play some youtubes
03:38 PM xxcoder: capt the laser video is cool
03:41 PM Tom_dev: it's leveled off at 9.1 even with yt
03:43 PM lcnc-relay: <captainhindsight_.> lets see in another hour, probably still under 20uS
03:43 PM Tom_L: http://tom-itx.no-ip.biz:443/~webpage/cnc/RTAI_TEST/tom-07Jul2024-597.png
03:44 PM lcnc-relay: <captainhindsight_.> there was a core 2 duo PC the other day that jumped really high by just moving the USB mouse
03:44 PM lcnc-relay: <captainhindsight_.> so way way way good enough for servo threads + Mesa
03:45 PM Tom_L: yup
03:45 PM Tom_L: bbl
03:45 PM Tom_L: and we ironed out the flex issue
03:50 PM lcnc-relay: <captainhindsight_.> ran axis instead? :p
03:56 PM JT-Shop: Tom_L, so isolcpus=1 make flex work?
04:02 PM _unreal_: throwing the offer out one more time. are there any people in here in the USA that have any interest in 25' parallel port cables? got a few of them. going to scrap them if no one is interested.
04:02 PM _unreal_: got some serial one's as well
04:03 PM lcnc-relay: <captainhindsight_.> sure, but mailing them will cost and arm and a leg
04:03 PM lcnc-relay: <captainhindsight_.> and/an
04:05 PM lcnc-relay: <captainhindsight_.> _unreal_: are they the thick and beefy IEEE-1284 types?
04:07 PM lcnc-relay: <captainhindsight_.> CaptHindsight c/oMakers Village
04:07 PM lcnc-relay: 2517 E Norwich Ave
04:07 PM lcnc-relay: St Francis WI 53235
04:48 PM lcnc-relay: <skunkworks8841> https://jauriarts.org/_matrix/media/v3/download/jauriarts.org/fHkKjBrhYsjLEPXDpygoUIcF/PXL_20240707_211710932.mp4
04:48 PM lcnc-relay: <skunkworks8841> i think that is the last tree in the way of tipping up the tower
04:50 PM JT-Shop: what are you putting on the tower?
04:50 PM lcnc-relay: <skunkworks8841> Over the air tv antenna.. and maybe a camera
04:51 PM JT-Shop: cool
04:51 PM lcnc-relay: <skunkworks8841> I would like to put a weather station up there.. but I can't find any that are poe
04:51 PM lcnc-relay: <skunkworks8841> You would think someone would make one
04:52 PM JT-Shop: I thought you had power at the tower?
04:53 PM lcnc-relay: <skunkworks8841> I do.. but it would be easy to just run a network cable up to the weather station at the top of the tower
04:58 PM lcnc-relay: <captainhindsight_.> "JT-Shop Tom_L, so isolcpus=1 make flex work?" it was likely the reboot, unless proven wrong so it might be a memory issue
05:03 PM lcnc-relay: <captainhindsight_.> skunkworks8841 did you pull the tree down with a cable and tractor?
05:04 PM lcnc-relay: <skunkworks8841> Yes.. after notching it where I wanted it to fall
05:05 PM lcnc-relay: <captainhindsight_.> skunkworks8841 https://ambientweather.com/
05:06 PM lcnc-relay: <skunkworks8841> I have looked at those... They use rf to communicate with the base station.
05:09 PM lcnc-relay: <captainhindsight_.> http://www.iqtronic.com/products/ethernet-lan-ip-weather-station-with-storm-detection/
05:11 PM lcnc-relay: <captainhindsight_.> https://www.cometsystem.com/products/web-sensor-with-poe-remote-thermometer-hygrometer-barometer-with-ethernet-interface/reg-t7611 FWIW
05:18 PM lcnc-relay: <captainhindsight_.> Tom_L: when running RTAI what does this output: grep "MEMORY_INIT" /boot/config-$(uname -r)
05:35 PM Tom_L: capt, http://tom-itx.no-ip.biz:443/~webpage/cnc/RTAI_TEST/RTAI_D525_7.7.2024.png
05:35 PM Tom_L: not too bad
05:36 PM -!- #linuxcnc mode set to +v by ChanServ
05:37 PM Tom_dev: grep "MEMORY_INIT" /boot/config-$(uname -r)
05:37 PM Tom_dev: CONFIG_DEBUG_MEMORY_INIT=y
05:48 PM * JT-Shop calls it a night
06:00 PM lcnc-relay: <skunkworks8841> Capt.. I saw that too.. but I don't think those are made anymore
06:05 PM _unreal_: i'm back for a few
06:05 PM _unreal_: beefy?
06:05 PM _unreal_: ahh
06:05 PM _unreal_: for serial or parallel
06:05 PM _unreal_: ?
06:05 PM _unreal_: I just found a bunch more as well
06:05 PM _unreal_: of each
06:06 PM xxcoder: capts asking if it has all wires or only some
06:06 PM _unreal_: as far as I know its 1 to 1
06:06 PM xxcoder: iso standard vs just for printer
06:06 PM lcnc-relay: <skunkworks8841> I also have the conduit run up to the attic.. so I can pull the fiber the 400 ft from the tower
06:07 PM _unreal_: ...... trying to remember if I still have a cable tester? if I do i have no idea where
06:12 PM _unreal_: ok I seem to have 3 25' parallel cables
06:13 PM _unreal_: one is a male to male, one is a male to female, and one is a db25 par. to printer port
06:14 PM _unreal_: I have 4 25' serial cables 1 to 1, and 6 10' null modem serial cables
06:14 PM _unreal_: the printer cables I can only assume are 1 to 1 or null
06:15 PM _unreal_: then I have a bunch of 10' printer cables
06:15 PM _unreal_: on idea how many
06:16 PM _unreal_: I think i have like 800 IDE 40 and 80 wires cables, and floppy cables
06:16 PM _unreal_: oh my god my dad was such a horder
06:16 PM _unreal_: :) scrap metal!!!! $$$$
06:16 PM _unreal_: I've got like 30 computers to get rid of
06:16 PM _unreal_: heh
06:18 PM _unreal_: everything from 486 to core 2 duo
06:18 PM _unreal_: sigh
06:18 PM _unreal_: love of p4's
06:18 PM _unreal_: love=lot
06:32 PM _unreal_: hum
06:43 PM _unreal_: looks like I have about a dozen barcode canners
06:43 PM _unreal_: scanners
06:50 PM Tom_L: capt, isolcpus=2,3 on one and isolcpus=1 on the other enabled flex to load
06:56 PM Tom_L: removing it again caused flex to crash
06:56 PM Tom_L: it needs to be there
07:06 PM lcnc-relay: <captainhindsight_.> Tom_L: you can also try disabling cores in BIOS, leave only 2 running
07:08 PM Tom_L: the d525 only has 2
07:09 PM Tom_L: i'm fairly satisfied with these results
07:18 PM Tom_L: captain, do you know what the process would be to remove the previous RTAI and install this one with the linuxcnc version for this one?
07:18 PM Tom_L: or is that a start over process?
07:19 PM rdtsc_away is now known as rdtsc
07:59 PM lcnc-relay: <captainhindsight_.> as far as I know it should be the same
08:00 PM lcnc-relay: <captainhindsight_.> sudo apt purge linuxcnc*
08:00 PM lcnc-relay: <captainhindsight_.> Tom_L: ^^
08:01 PM lcnc-relay: <skunkworks8841> huh - is someone trying to get linuxcnc in debian updated?
08:01 PM lcnc-relay: <captainhindsight_.> Tom_L: then install as though fresh Debian 12
08:02 PM lcnc-relay: <captainhindsight_.> skunkworks: new RTAI debs for 2.9.2
08:02 PM lcnc-relay: <skunkworks8841> no - I am seeing debian messages on the mailing list..
08:09 PM lcnc-relay: <captainhindsight_.> https://photos.app.goo.gl/QNBw5BwFLraLi8CcA
08:10 PM lcnc-relay: <captainhindsight_.> typical HP PC, no BIOS settings for virtualization, speed stepping or power management
08:40 PM Tom_L: captainhindsight, one thing i wondered about installing over RTAI is the kernel is the same name isn't it?
08:40 PM Tom_L: i didn't pay that close attention to that
08:41 PM Tom_L: 5.4.258
08:42 PM Tom_L: i could revert to the non rtai kernel and remove the rtai then do the install
08:54 PM Tom_L: i think that may be a safe way
08:58 PM lcnc-relay: <captainhindsight_.> Tom_L: you need to install all four of those debs together, no mix and matching
08:59 PM lcnc-relay: <captainhindsight_.> the problem was that the repos listed on the LCNC website were not a match for each other
09:24 PM Tom_L: ahh
09:25 PM Tom_L: if i remove the rtai and purge linuxcnc that would do it wouldn't it?
09:25 PM Tom_L: if not i can reinstall it all but i just got that copy set up and working with the old RTAI
09:50 PM lcnc-relay: <ffffrf> does anyone know where to get firmware that gives you a PWM output on mesa 7i96s? like is there a firmware repository? i heard somewhere is firmware that makes stepgen4 a dedicated pwm - i need it to control spindle pwm to analog
09:50 PM lcnc-relay: <ffffrf> also how likely is using such firmware to fuck everything up for me with this lathe?
09:57 PM Tom_L: captainhindsight, aparently that scheme worked to get RTAI replaced with RTAI
09:58 PM Tom_L: is there a definite way to identify yours?
09:58 PM Tom_L: other than the histogram spikes are like pencils
09:59 PM pcw---home: ffffrf: All 7I96S firmware has PWM for the on card analog output
09:59 PM Tom_L: so i selected a dynamic kernel (the default from the install), purged rtai & linuxcnc
09:59 PM Tom_L: then installed those 4 files and rebooted
10:00 PM Tom_L: after updating-grub a couple times
10:01 PM Tom_L: up to 4.9uS after a couple min so that tells me it's yours cause the other one would have been in the 20's
10:01 PM pcw---home: ffffrf: You would only need PWM on stepgen4 on a 7I96S if you needed two analog outputs
10:04 PM Tom_L: 14.7 with the help of 4 glxgears and YT
10:05 PM Tom_L: if you're watching YT running your mill there's something wrong with you ;)
10:05 PM Tom_L: pcw---home, you've been around a while.. do you know who has the keys to the webpage?
10:05 PM Tom_L: to update the RTAI packages
10:22 PM Tom_L: ok that install didn't quite go as planned. looks like a fresh 12 install is the way to go
10:22 PM Tom_L: axis ran, good latency but flex was a bust
10:23 PM Tom_L: save that for another day.
10:27 PM lcnc-relay: <ffffrf> PCW - i can’t use that one it’s limited to 5-20v also the potentiometer controlling sherline spindle is connected directly to mains so i need something isolated
10:27 PM lcnc-relay: <ffffrf> google was saying bad idea not feasible to use that
10:28 PM lcnc-relay: <ffffrf> what people did was use SPINX1 board from mesa with a standalone PWM generator on a mesa
10:29 PM Tom_L: ffff i did that on my sherline
10:29 PM Tom_L: you can get a mains isolation board for it
10:31 PM Tom_L: http://tom-itx.no-ip.biz:443/~webpage/cnc/PDF/kbsi_240d_manual.pdf
10:31 PM Tom_L: btw, ground is floating on that board so it'll cause havvock if you try anything else
10:31 PM Tom_L: on the sherline controller that is
10:32 PM Tom_L: http://tom-itx.no-ip.biz:443/~webpage/rue/Control1.jpg
10:32 PM Tom_L: you can see the 2 mounted on the door
10:33 PM Tom_L: i went so far as to rig up relays for reverse
10:34 PM Tom_L: if you try to control the spindle board directly you're asking for trouble
10:34 PM Tom_L: begging...
10:36 PM Tom_L: mine had the original sherline pot to start with too
10:37 PM Tom_L: http://tom-itx.no-ip.biz:443/~webpage/cnc/PDF/
10:37 PM Tom_L: the driver & isolation boards
10:49 PM _unreal_: Tom_L, I have all kinds of BLDC motors on hand with built in encoders
10:49 PM _unreal_: some even have breaks
10:49 PM _unreal_: when all the BS with my dads house and my "living" location issues end. I'll be looking into them
10:54 PM pcw---home: ffffrf: The 7I96S analog out _is_ isolated and has the same voltage limitations as the SPINX1A
10:56 PM pcw---home: (that 5 to 20V voltage limitation is effectively the end to end potentiometer voltageand not the isolation voltage)
10:57 PM pcw---home: Tom_L: No I no knowledge of any LinuxCNC passwords
11:02 PM pcw---home: SPINX1A and 7I96S analog section isolation is 300 VAC (you need of course to be very careful to not accidentally connect the isolated section to any low voltage circuitry)
11:04 PM Tom_L: the problem with the sherline driver is ground floats
11:04 PM Tom_L: and it lets you know that if you touch it
11:04 PM Tom_L: that's why you _have_ to use that isolation board or such
11:07 PM pcw---home: Yes, it can be at line potential (that's why the SPINX1 and 7I96S (and 7I76E,7I76,7I78,7I47S) analog spindle sections are isolated)
11:08 PM Tom_L: so it could work without the isolation board?
11:08 PM pcw---home: (well and to keep VFD noise out of the logic sections)
11:08 PM rdtsc is now known as rdtsc_away
11:09 PM pcw---home: Yes, but you do end up having line voltage close to the low voltage wiring so not ideal for clumsy hands like mine...
11:10 PM pcw---home: It also depends on whether the drive can supply the analog section power (~8 ma on older cards ~3 ma on newer)
11:21 PM lcnc-relay: <captainhindsight_.> pcw---home: you think your hands are clumsy, you should try mine!
11:22 PM lcnc-relay: <captainhindsight_.> if you need something dropped, hand it to me
11:30 PM lcnc-relay: <ffffrf> i read sherline lathe pot voltage is 0-9 volts, how do i get that range with the mesa?
11:31 PM lcnc-relay: <ffffrf> so as long as I am carefully to separate my wiring i can just use the analog control on mesa directly to sherline board?
11:32 PM lcnc-relay: <ffffrf> I am sorry I am a novice
11:33 PM lcnc-relay: <ffffrf> tom - are you using a spindle encoder? if so did you diy or buy sherline? i feel like their stuff is so overpriced but also may be a hassle to design custom mounting for my own encoder
11:36 PM pcw---home: captainhindsight: If I can short something out when waving a screwdriver or scope probe I invariably do...
11:47 PM lcnc-relay: <ffffrf> also how did you get the output to be in the 0-9v range that sherlines analog range has
11:47 PM lcnc-relay: <ffffrf> voltage level shifter?
11:50 PM lcnc-relay: <ffffrf> oh wait - did i misunderstand the manual's wording: it says the range between spindle- and spindle + must be between 5-20 volts, does that mean the DIFFERENCE between them has to be in that range?
11:51 PM lcnc-relay: <ffffrf> so you could have 0 and 9v because the difference is 9v which is within therange