#linuxcnc | Logs for 2019-04-13

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[03:11:11] <Deejay> moin
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[05:30:50] <_abc_> Hi. Does anyone know if the PRU's in the Beaglebone are used in the cnc-interpreter versions which run on beaglebone?
[05:31:30] <_abc_> Also if those can be "slaved" to linuxcnc? I.e. is there some way to use a cnc controller fw running on a bb with a suitable "shield" for cnc drive, to linxucnc on a pc?
[05:31:46] <_abc_> And if that fw on the bb uses PRU based realtime code?
[05:33:47] <_abc_> Wow, Satudays kill freenode :)
[05:36:16] <_abc_> And I meant "cape" not "shield" heh
[05:39:21] <_abc_> http://www.righto.com reading this it makes total sense to use a bb as cnc driver, the PRUs were made for this!
[05:55:14] <_abc_> Ha there's even a FORTH compiler for PRU https://github.com
[05:55:28] <_abc_> </me will lurk waiting for intelligent comments>
[05:55:38] * XXCoder keeps hiding
[05:55:51] <XXCoder> heh
[05:55:52] * _abc_ does not notice XXCoder at all
[05:56:09] <XXCoder> whats up? unfortunately i dont know about your questions so dunno
[05:56:29] <_abc_> Thank you for adding bytes to the lack of information :)
[05:56:35] <_abc_> No, thanks for being nice.
[05:56:50] <XXCoder> lol
[05:59:23] <_abc_> See what I did with that judiciously placed comma there? :)
[06:01:03] <XXCoder> indeed
[06:01:29] <SpeedEvil> PRUs are moderately featured microcontrollers.
[06:01:44] <_abc_> Yes I just read about the PRU programming
[06:02:09] <SpeedEvil> Or just use one core of an ESP32.
[06:02:16] <SpeedEvil> (45% kidding)
[06:04:31] <_abc_> SpeedEvil: that would be 50% kidding, no?
[06:04:35] <_abc_> One core of 2?
[06:05:10] <SpeedEvil> - ESP32 has ethernet if you don't want to trust wifi machining, quite a lot of RAM, and one core entirely free at 240MHz.
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[06:05:21] <_abc_> I just discovered that qemu has qemu-system-xtensa
[06:05:45] <SpeedEvil> The determinism of timing of that core is not as good if you use off-chip RAM and ROM, and it has about ten pins, but still, it could be very useful.
[06:06:07] <_abc_> wifi machining just like ether machining, unless on dedicated segment, will be used to pump data buffers on the realtime embedded side, not real realtime
[06:06:27] <SpeedEvil> Internal RAM is about the same as the PRU core IIRC
[06:06:35] <SpeedEvil> It's been a while since I read up on the PRU
[06:06:39] <_abc_> dedicated segments means 1:1 ether cable, interface
[06:07:00] <_abc_> SpeedEvil: PRU has 8k program ram 8k data ram and is Harvard
[06:07:03] <_abc_> brb
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[06:16:10] <_abc_> SpeedEvil: make that: Sitara as used in bb has 8k+8k, other devices differ, lowest is 4k program + 0.5k data
[06:17:07] <_abc_> Also apparently PRUs are optimized for write, read has latency. http://processors.wiki.ti.com
[06:17:25] <_abc_> Which is sort of a bummer for bit banging in the usual sense of the word, as known from avr and pic and so on.
[06:23:55] <_abc_> SpeedEvil: also re: ethernet realtime on beaglebone: it has Industrial Ethernet extensions made for this http://www.ti.com
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[06:24:11] <_abc_> Of course the other side (linux pc) must also have them to work right.
[06:24:26] <SpeedEvil> I meant ethernet on the ESP
[06:25:34] <_abc_> ESP32 is definitely not aimed at industrial. I am pleasantly surprized the cpu in the bone was not selected by "consumer" features only, like hdmi and other hipster factors.
[06:25:44] <_abc_> Did not know it has advanced industrial features.
[06:26:03] <_abc_> I just read one needs to disable HDMI to get more PRU pins :) :)
[06:26:12] <SpeedEvil> In a large way it's a damn shame the Pi came out when it did.
[06:26:26] <SpeedEvil> It killed a lot of interesting boards and stifled development.
[06:26:41] <_abc_> Pi is a toy. A dog slow toy with the default linux too.
[06:26:58] <_abc_> I assume someone did put QNX on it at some time, am curious if that is also slow.
[06:27:00] <SpeedEvil> yeah. But it's $35. Wait, it's $5. (but you can't buy one)
[06:27:24] <XXCoder> QNX is $35/$5?
[06:27:35] <SpeedEvil> The loss leader thing they did for ages with the $5 one could almost have been (and I'm not sure it wasn't) calculated to kill other boards.
[06:27:38] <SpeedEvil> XXCoder: Pi
[06:27:52] <_abc_> SpeedEvil: indeed.
[06:28:02] <XXCoder> CHIP by nextthing tried to ne... next thing
[06:28:04] <XXCoder> but failed
[06:28:14] <XXCoder> its stats were underwealming
[06:28:19] * SpeedEvil looks at his CHIP
[06:28:40] <XXCoder> i have a few and 2 pocketchips - one is dead
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[06:33:05] <_abc_> Is the CHIP the BBC one?
[06:33:49] <_abc_> Is it good for anything? Obviously, nobody thought about it being google-able. The name. As usual. Brilliant for 1850, Lady Ada would have been proud. We're in 2019.
[06:33:56] <XXCoder> BBC? nah its from NEXTTHING like I said
[06:34:20] <XXCoder> proper name is c.h.i.p.
[06:34:31] <SpeedEvil> ChIP is like Pi done on a tiny budget by several guys.
[06:34:47] <SpeedEvil> And without someone high up in the company making SoCs leading it.
[06:34:57] <XXCoder> they had massive budgeting problems and crashed
[06:34:57] <_abc_> http://www.chip-community.org was
[06:36:19] <_abc_> Well, R8 is a good cpu afaik
[06:46:15] <XXCoder> maybe i didnt really get into playing around with it
[07:12:04] <Tom_L> morning
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[07:30:44] <jthornton> morning
[07:31:29] <XXCoder> hy jt
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[07:36:43] * jthornton slept in today
[07:37:14] <XXCoder> i tried to do that. failed.
[07:38:14] <jthornton> last time I looked at the clock it was 3am lol
[07:38:34] <XXCoder> last time i looked at mine its 4:38 am
[07:38:46] <XXCoder> which is now few seconds ago lol
[07:40:57] <jthornton> I mean before I woke up lol next thing I knew it was 6:30
[07:41:13] <XXCoder> pretty deep sleep
[07:44:12] <XXCoder> talking about sleep, later
[07:47:48] <jthornton> night
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[10:26:13] <gregcnc> Tom_L jthorton I'm sure you both know just the line that minor diameter controls final pitch diameter is not entirely correct
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[10:27:16] <gregcnc> It works for full profile multi thread mills, but single pitch will be more difficult to setup correctly
[10:29:11] <gregcnc> I've only caught some of the messages about this, but radius comp is a given to allow adjustments
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[10:43:59] <JT-Shop> it seems to me that pitch diameter should control the tool path but still struggling with that
[10:45:00] <JT-Shop> also all the examples that I've found turn on cutter comp after moving to the hole location and that won't work with lcnc as it requires a move after G41/42 to be longer than tool diameter
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[10:59:12] <gregcnc> Pitch diamter does control the tool path in the end, but the hard part is having the details of the too to define it correctly
[10:59:20] <gregcnc> Tool
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[11:01:01] <gregcnc> I use an excel file to create threadmill code and use rad comp in linuxcnc, but i use a diameter offset, not too diameter, which has screwed me more than once when i forgot
[11:04:58] <JT-Shop> if you don't mind sharing that excel file, I'd like to look at it
[11:05:34] <JT-Shop> I have a spreadsheet that does a good job of finding the sharp V of the tool based on the diameter and crest
[11:05:51] <JT-Shop> I'm popping in and out splitting firewood
[11:06:42] <gregcnc> it's metric for more fun
[11:09:45] <jthornton> I need metric as well
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[11:38:38] <boddax> i need help about ramp 1.4 to connect
[11:40:45] <boddax> A-C B-D the stepper coils , ramp 4 pin connector has 1B-2A-1B-1A somebody can tell me how to wire correctly
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[11:42:20] <Tom_L> that sounds like a #reprap question
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[11:48:09] <Tom_L> thread calculations: https://www.google.com
[11:50:05] <boddax> ah ok Tom_L thanks
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[11:52:07] <Tom_L> PD = (D - 0.64952 p ) where PD=pitch circle D=maj diam p=1/tpi
[11:52:39] <Tom_L> ISO 898-1:1999
[11:53:53] <Tom_L> https://www.engineersedge.com
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[11:58:13] <pink_vampire> Hi
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[12:19:20] <_unreal_> low
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[12:38:33] <lcvette_fn> hello
[12:39:31] <lcvette_fn> logs
[12:43:43] <lcvette_fn> so i found a few ram sticks and had a spare SSD laying around and decided to see if i could salvage any latency improvements from those lowly AMD A6-7400k / ECS A58 FM2+ motherboard pc's I had purchase back in 2016
[12:44:27] <lcvette_fn> the original test was run and the latency results were staggeringly horrible and unusable neven with mesa hardware if anyone remembers
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[12:51:14] <lcvette_fn> was trying to find those results in the logs but couldn't.. but they were getting up close to a 1,000,0000 in max jitter.. was horrid!
[12:52:27] <lcvette_fn> so i ran some detailed testing after i saw some improvement from adding in a ssd over the barracuda mechanical HDD and decided to see if some different ram and configuration made a difference as well.
[12:52:30] <lcvette_fn> it did
[12:53:16] <lcvette_fn> so i charted it and figured i would share in the event anyone switching to the preempt-RT kernel was also experiencing a jump in latency issues over the RTAI version
[12:53:20] <lcvette_fn> https://matrix.org
[12:54:06] <pink_vampire> I have a problem with the homing, when I click home he machine move the X axis to the wrong direction
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[12:55:11] <lcvette_fn> pink_vampire you can fix that in the ini
[12:55:20] <pink_vampire> how?
[12:55:30] <lcvette_fn> in the homing section for that axis
[12:55:37] <pink_vampire> what do i need to edit?
[12:56:09] <gloops> https://www.ebay.co.uk
[12:56:13] <gloops> bladdy ell
[12:57:20] <lcvette_fn> ```
[12:57:25] <lcvette_fn> HOME_SEARCH_VEL = -3.00 HOME_LATCH_VEL = -.400 HOME_FINAL_VEL = 6.00
[12:57:37] <lcvette_fn> signs in front of the numbers dictate direction
[12:57:48] <rmu> lcvette_fn: memory or hard disk should not influence latency jitter in any meaningful way. those numbers look pretty bad IMHO.
[12:58:43] <lcvette_fn> rmu: these were specifically done to test that and it 100% does
[12:58:53] <lcvette_fn> and is repeatable
[12:58:58] <rmu> lcvette_fn: there is something else going on
[12:59:38] <gloops> if the homing was working, and now doesnt - check power to the switch
[13:00:30] <Jymmm> ...and loose wires/connections
[13:00:41] <lcvette_fn> rmu: i have two identical boards and processors and both test the same
[13:01:08] <rmu> lcvette_fn: what kernel did you use? browser, 2 youtube videos, gimp libreoffice and 10 glxgears seems to be a bit much for a 4gig machine
[13:02:10] <lcvette_fn> debian stretch latest preempt RT kernel
[13:02:22] <lcvette_fn> freshly updated and upgraded on a new install
[13:03:02] <rmu> i suspect thermal issues
[13:05:02] <lcvette_fn> max jitter jumps to 40k+ just by moving the latency test window before opening anything else
[13:05:08] <lcvette_fn> on the 4gb sticks
[13:05:41] <lcvette_fn> it gets up there pretty quick, long before most of those test items have even been opened
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[13:06:38] <rmu> is this running some kind of shared memory graphics?
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[13:07:54] <pcw_home> lcvette_fn: you might try a servo thread only test
[13:07:58] <rmu> that could be influenced by memory bandwidth. that could be helped with real graphics card
[13:08:32] <lcvette_fn> chris@lathe1:~$ lspci | grep VGA 00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Kaveri [Radeon R5 Graphics]
[13:09:09] <lcvette_fn> im not concerned with fixing these, i have since replaced them
[13:09:16] <lcvette_fn> i was just playing since they were laying around
[13:09:29] <lcvette_fn> i was impressed the memory and ssd improved everything so much
[13:10:22] <lcvette_fn> i have since replaced them with the H97M Pro4 and Z97e-itx/ac and G3258 processors
[13:10:29] <lcvette_fn> which have stupid good latency
[13:10:46] <lcvette_fn> shout out! thanks to pcw_home
[13:11:33] <lcvette_fn> pcw_home: how would one test that?
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[13:12:25] <rmu> FWIW numbers i get on an athlon 4450e with on board radeon hd 3200 are much better, system is more than 10 years old
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[13:13:20] <lcvette_fn> completely understand, i think it may just be the mobo and processor combo isn't the best for this application
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[13:17:58] <pcw_home> on the latency test its "latency-test 1ms 1ms"
[13:18:41] <lcvette_fn> just run that in terminal?
[13:18:52] <lcvette_fn> i always have run from the menu
[13:19:24] <pcw_home> on the histogram: "latency-histogram --nobase --sbinsize 1000"
[13:20:00] <pcw_home> yeah from a terminal
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[13:26:51] <_unreal_> rmu, hello
[13:30:02] <lcvette_fn> pcw_home: bit confused
[13:30:26] <lcvette_fn> i got the histogram and can run the latency test, but not sure if i did it right?
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[13:31:57] <lcvette> opened irc on the computer being tested
[13:35:42] <pcw_home> here's a servo thread only histogram: http://freeby.mesanet.com
[13:36:28] <lcvette> http://i.imgur.com
[13:36:40] <lcvette> did i do it right?
[13:38:03] <lcvette> pcw_home: looks like i have it
[13:38:15] <lcvette> certainly looks different
[13:38:29] <pcw_home> Yep, for an idea how infrequent the latency excursions really are, try the linear scale
[13:39:31] <lcvette> how do i do that?
[13:39:48] <lcvette> uncheck ylogscale?
[13:40:09] <pcw_home> yep
[13:40:48] <lcvette> http://i.imgur.com
[13:41:01] <lcvette> hows it look in servo thread only?
[13:43:33] <lcvette> this is with the single 8gb stick of samsung ram
[13:44:01] <pcw_home> Yeah, that still looks pretty bad but maybe probably usable
[13:44:25] <lcvette> im gonna throw in the two sticks of 4gb that run in dual channel
[13:44:49] <lcvette> that was 34% better results before
[13:45:00] <lcvette> see if it looks the same on the servo thread only histogram
[13:45:02] <lcvette> brb
[13:46:38] <pcw_home> Do you have all power management options turned off in the BIOS? ("Cool and Quiet" etc)
[13:47:13] <lcvette_fn> probably not
[13:47:29] <lcvette_fn> i can look but i get confused when i go in there
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[13:49:59] <lcvette> back
[13:50:12] <lcvette> hyperx 4gbx2 installed
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[13:57:20] <lcvette> http://i.imgur.com
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[13:59:01] <lcvette> pcw_home: still running, but its a significant difference
[13:59:33] <lcvette> people say ram should make a difference, but this shows differently does it not?
[13:59:44] <lcvette> shouldn't*
[14:03:53] <lcvette> im going to try going into the bios and turning off things
[14:04:17] <lcvette> but i think last time i tried this on the big machine the results weren't fruitful
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[14:06:17] <pcw_home> Thats a huge change, wonder if the AMD memory controller has some pathology with non-interleaved RAM...
[14:06:58] <lcvette_fn> well on the motherboard it says dual channel ddr3
[14:07:17] <lcvette_fn> i read that in dual channel the memory is much more efficient
[14:07:24] <lcvette_fn> thats why i decided to try it
[14:07:44] <lcvette_fn> that is a comparison between single 8gb stick and 2 4gb sticks
[14:11:48] <lcvette> what is the important part of the graph here?
[14:11:55] <lcvette> the height or the width?
[14:13:22] <rmu> it may have to do with integrated graphics processor and borderline memory bandwidth for graphics
[14:13:55] <rmu> lcvette: you could try changing resolution to something lower and/or lowering refresh rate to 30hz
[14:14:05] <rmu> and look if that makes any difference
[14:15:24] <lcvette> i was just curious to test based on my reading
[14:16:40] <lcvette> im not gonna spend much time trying to improve these machines, i will package them and sell them
[14:16:50] <lcvette> get something better suited for suture projects
[14:16:59] <lcvette> future*
[14:17:10] <lcvette> this was my first brush with AMD
[14:17:22] <lcvette> im sure they make awesome stuff, but i like my intel
[14:17:24] <lcvette> lol
[14:17:47] <lcvette> think im gonna sell these and buy a newer system to test
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[14:18:19] <lcvette> i wanna try a h370m-itx/ac + Pentium Gold G5400
[14:18:53] <lcvette> its a relatively inexpensive mini-itx setup that is newer with onboard m.2 ultra socket
[14:19:04] <lcvette> makes for compact packaging
[14:19:23] <lcvette> readikly available and parts are fairly inexpensive and available ciurrently
[14:21:31] <Tom_L> pcs get 'old' fast
[14:21:51] <lcvette> yes they do
[14:22:23] <lcvette> and when they do the parts for them become priced like platinum
[14:22:37] <Tom_L> or non exhistent
[14:22:44] <lcvette> yup
[14:23:07] <lcvette> so hoping to find a new generation build that can be proven
[14:23:17] <lcvette> i know the 8300 elite usdt's are awesome
[14:23:25] <lcvette> but they won't be long for this world either
[14:23:33] <Jymmm> Computers (and most electronics) ar ethe only thing that are worth thousands today, and hundreds in 6 months
[14:23:37] <Tom_L> find something preempt-rt works good on cause that looks like where it's headed
[14:23:56] <Tom_L> Jymmm, cars
[14:23:56] <lcvette> thats the goal
[14:24:34] <Tom_L> lcvette i'm not using them on a mill but i'm pretty happy with gigabyte boards
[14:24:37] <Jymmm> Tom_L: worht hundreds in 6 months, where?!?!?!?!
[14:25:01] <Tom_L> seems that way
[14:26:01] <lcvette> yeah but the gigabyte 300 series boards are getting some bad reviews
[14:26:14] <lcvette> im switvhing over to servos on everything now
[14:26:41] <lcvette> so i want to make sure i have the specs pcw_home says servos should have
[14:27:10] <lcvette> not that i fully understand what they mean, but i know if he says i need them then i better make sure i have them
[14:27:11] <lcvette> lol
[14:36:51] <_unreal_> how would I go about getting my whb04b-6 working in lcnc?
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[14:39:45] <Tom_L> _unreal_, http://wiki.linuxcnc.org
[14:39:47] <Tom_L> for a start
[14:40:18] <Tom_L> http://wiki.linuxcnc.org
[14:41:21] <Tom_L> some of the information on wiki is old
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[14:59:21] <_unreal_> looking
[15:07:45] <_unreal_> https://github.com
[15:24:03] <gregcnc> you can probably buy a skid of HP 8300 for the price of something new
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[16:31:16] <lcvette_fn> gregcnc: i have a 8300 on the way for a small machine also
[16:31:18] <lcvette_fn> :D
[16:31:39] <gregcnc> rhino?
[16:31:46] <lcvette_fn> yeah
[16:32:03] <lcvette_fn> la banana
[16:32:05] <lcvette_fn> lol
[16:32:10] <gregcnc> lol
[16:32:25] <gregcnc> I may end up with a new retrofit, like I need a hole in the head
[16:32:54] <gregcnc> A mill turned up locally that probably runs, but I sent a guy with the same machine an email asking about tooling
[16:33:05] <lcvette_fn> im ready to get mine finished
[16:33:07] <lcvette_fn> yeah?
[16:33:11] <lcvette_fn> what kind of machine?
[16:33:27] <gregcnc> I knew he was having trouble with the control and it sounds like he wants to sell it now
[16:34:50] <gregcnc> So decisions.
[16:35:17] <lcvette_fn> what mill?
[16:36:37] <gregcnc> Emco Mill 155, small but bigger than the puny 125 I have now
[16:39:31] <lcvette_fn> i almost bought one of the head and changer assemblies from one of those off ebay a few years ago
[16:39:38] <lcvette_fn> but like you said, the tooling...
[16:40:02] <lcvette_fn> probably have it made in china
[16:40:17] <lcvette_fn> $15-20 holder
[16:41:01] <gregcnc> I figured out how to modify BT30 for the 100/125, but 155 is very different and I haven't had one in hand to measure.
[16:41:38] <gregcnc> will they do custom tooling for that money? They make piles of std BT30, so it's cheap
[16:42:26] <lcvette_fn> yeah, unless its a big departure from a similar tool
[16:43:09] <gregcnc> something to consider. Maritool wouldn't even consider making 20 for the smaller mill
[16:43:18] <lcvette_fn> of course not
[16:43:29] <lcvette_fn> its maritool
[16:43:32] <lcvette_fn> they can't be bothers
[16:43:35] <lcvette_fn> bothered
[16:43:51] <lcvette_fn> they are busy making big money on their standard tooling
[16:44:44] <lcvette_fn> do they just have a bearing on them
[16:44:48] <gregcnc> they make the holders for PocketNC
[16:45:13] <lcvette_fn> no dog notches?
[16:45:18] <gregcnc> the 155 has a bearing and flange with a slot, but the solt run into the taper
[16:45:18] <lcvette_fn> or with dog notches?
[16:51:17] <lcvette_fn> geez, can't even google up a picture of one
[16:51:40] <lcvette_fn> i would get some quotes on tooling before i considered purchasing
[16:53:25] <gregcnc> https://www.slideshare.net
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[16:55:45] <lcvette_fn> yeah they could make those
[16:56:37] <lcvette_fn> i don't think i would want them putting junk bearings on them
[16:56:50] <lcvette_fn> but the machined bodies should be no problem
[16:56:57] <gregcnc> the bearing floats in use
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[16:58:52] <lcvette_fn> still i think having them add the bearing might push the price up
[16:59:10] <lcvette_fn> they are in the business of machining parts not installing bearings
[16:59:28] <gregcnc> sure no need for that. is there a place you've actually used?
[16:59:37] <lcvette_fn> so if you request them to delve into something that slows their production or stumps them they may pass or quote high
[17:00:03] <gregcnc> any quote will be less than Emco
[17:00:09] <Deejay> gn8
[17:00:38] <gregcnc> one guy posted Emco Spain wanted 250eruo
[17:01:07] <lcvette_fn> the company i purchased my tooling from makes great tooling and they custom made me a crapload of US sized er collets that are of incredible quality and the grinding is as good as the high end collets i have bought stateside if not better
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[17:29:56] <gloops> clausing lathes - any good?
[17:34:41] <Rab> gloops, I have an old Clausing mill, so I'm on the Clausing email list/Yahoo group. Most of the posts are from lathe owners with various esoteric-sounding problems. I've formed the opinion that they were commercial-grade machines, but with a lot of complexity and things to go wrong.
[17:35:30] <Rab> I've been looking for a "classic" lathe, but I wouldn't be interested in a Clausing.
[17:35:32] <gloops> ahh
[17:36:32] <gloops> the one im looking at at is vintage though, looks solid enough but i dont know anything abut them
[17:36:51] <gloops> https://www.ebay.co.uk
[17:37:05] <gloops> only 5 or 6 miles from me
[17:37:49] <Rab> Specifically, there's some kind of hydraulic clutch system with master and slave cylinders which needs rebuilding. There is some kind of epoxy surface in the power train--maybe the spindle mount?--which deteriorates almost imperceptibly, but enough to affect operation and require some arcane reapplication procedure.
[17:37:53] <gloops> power cross feed, threading gearbox
[17:38:18] <gregcnc> RAB specific to 5900, 6900, maybe a few otehrs
[17:38:23] <Rab> And there are all kinds of adjustments and stuff to get dirty or wear out.
[17:38:25] <gloops> that does sound like something to avoid then Rab
[17:39:01] <gregcnc> that ebay lathe has none of that
[17:39:11] <Rab> gregcnc, as you can probably tell, I'm just ignorantly repeating second-hand info.
[17:39:37] <gloops> £200 cheap atm, it isnt cheap if its a pain in the ass though
[17:39:57] <gregcnc> you missed my comment
[17:40:18] <gloops> yes i did see it gregcnc, so ill keep watching it
[17:40:42] <gloops> i might message him anyway, being so close i could go and have a look
[17:41:04] <Rab> So I would say Clausing is/was a great manufacturer of real machine tools, but I would do some very careful research before buying any particular model of lathe.
[17:41:27] <gregcnc> That looks like the early 100 series
[17:41:37] <gloops> bit awkward as it isnt badged clausing, it is one though
[17:41:43] <gregcnc> http://www.lathes.co.uk
[17:42:19] <gregcnc> well we have colchesters badged clausing
[17:43:42] <Rab> I like the look of that lathe for a light home shop. That's a tiny chuck though.
[17:44:06] <gloops> Sold during the late 1940s and early 1950s - and an interesting development of the Clausing 100 Series Mk. 3
[17:44:16] <gloops> (Fortis)
[17:44:17] <gregcnc> Check out the jaw ways of that chuck
[17:45:11] <Rab> gregcnc, they expand at an angle?
[17:45:28] <gregcnc> never seen that
[17:45:30] <gloops> english chuck, not be the original
[17:46:55] <Rab> That looks like a real pain. I guess the workpiece would suck in slightly while tightening. (Or push out with internal grip.)
[17:47:15] <gloops> trying to think back, im sure ive bought something from him before
[17:49:55] <Rab> There is a more srs Clausing, although I'm not sure they want to sell it. https://sanantonio.craigslist.org
[17:51:21] <gregcnc> I have the shorter version of that. That's a lot of money.
[17:52:14] <gloops> that looks a lot more sophisticated
[17:52:26] <gregcnc> I don't think it is
[17:53:58] <gregcnc> it has three additional ratios on the feed screw, and 2 more on the input, but that's about it
[17:54:16] <Rab> It's just got that mid-century mod fascia. My mill is from the same era.
[17:54:19] <gregcnc> the 4900 are less common and have a 1 3/4"-8 spindle nose
[17:55:28] <gregcnc> if they don't have a steady or follow rest, they are hard to find
[17:55:38] <gloops> well if you took the shabby paint off the fortis version, there isnt a lot different really
[17:56:29] <gloops> ill see how it goes, probably go through the roof near the end of the auction
[17:58:39] <gregcnc> https://www.ebay.com a newer Emco about the same size
[18:00:28] <Rab> What's that spindle attachment? A collet chuck with a handwheel for tightening?
[18:00:48] <gregcnc> yes, i have one of those, they are nice
[18:00:59] <gloops> id rather have this https://www.ebay.co.uk
[18:01:13] <gregcnc> Yes so would I
[18:01:27] <gloops> reserve is over £750 though, hes tried it before
[18:01:38] <gregcnc> the threading range on the Emco leaves something to be desired
[18:02:17] <gregcnc> it would have to be cleaned to get it
[18:03:13] <gloops> tis in yorkshire as well, difficult to get us to part with more than 300 lol
[18:03:35] <gloops> bedtime here anyway
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[21:43:18] <Tom_L> jthornton around?
[21:43:53] <XXCoder> yo
[21:44:02] <XXCoder> dunno its been super quiet here
[21:44:27] <XXCoder> its so slow I will probably die of old age before tomorrow comes
[21:50:42] <Tom_L> working on my macro a bit
[21:55:20] <XXCoder> the mill thread?
[21:56:10] <Tom_L> yeah
[21:56:38] <XXCoder> cool :)
[21:56:44] <XXCoder> I wonder if it would work for wood.
[21:56:54] <Tom_L> i don't know why not
[21:56:55] <XXCoder> making wooden bolt and threaded holes
[21:57:01] <XXCoder> it'd have to be giant tho hm
[21:57:06] <Tom_L> it's cutting the same path
[21:57:10] <Tom_L> why?
[21:57:28] <XXCoder> wood cant be thin threaded it'd break, that i assume anyway
[21:58:22] <Tom_L> probably can with live tooling
[21:58:53] <Tom_L> http://tom-itx.no-ip.biz:81
[21:58:57] <Tom_L> that's 3 tpi
[21:59:19] <XXCoder> pretty dang large indeed
[21:59:28] <XXCoder> partially strippd, looks but old?
[21:59:37] <XXCoder> *bit
[21:59:40] <Tom_L> real old
[21:59:44] <Tom_L> http://tom-itx.no-ip.biz:81
[21:59:47] <Tom_L> replaced it with that
[22:00:00] <XXCoder> cool :)
[22:00:13] <XXCoder> i like lathes but im bit too afraid of running em lol
[22:00:35] <XXCoder> i like cnc routers a lot but not many of companies run one
[22:00:38] <Tom_L> cutting a 3tpi thread on the lathe was fun
[22:00:42] <Tom_L> gotta be quick
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[22:01:40] <XXCoder> i bet
[22:02:31] <Tom_L> https://contest.techbriefs.com
[22:05:15] <XXCoder> most invisible glass is interesting
[22:05:18] <XXCoder> great for solars!
[22:05:26] <XXCoder> solar panels that is
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[22:21:07] <Tom_L> http://tom-itx.no-ip.biz:81
[22:23:04] <Rab> Tom_L, what was that wooden screw from?
[22:23:14] <XXCoder> looks like 3 cuts of increasing depth
[22:23:17] <XXCoder> nice
[22:23:19] <Tom_L> an old old square grand piano
[22:24:01] <Tom_L> XXCoder i fixed the lead in out from line to arc
[22:24:15] <Tom_L> the rest was done already
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[22:31:18] <cryptg_> life check
[22:32:08] <Tom_L> empty
[22:32:14] <cryptg_> i see
[22:32:23] <cryptg_> question for the general chat
[22:32:28] <cryptg_> belt or ball screw
[22:32:41] <cryptg_> what is recommended for a cnc
[22:32:43] <Tom_L> question for the curious: application?
[22:32:52] <Tom_L> i'd go ball screw
[22:33:00] <cryptg_> cnc mill build
[22:33:04] <Tom_L> unless it's 100' long
[22:33:06] <XXCoder> materials to be cut?
[22:33:11] <Tom_L> then the screw would whip
[22:33:20] <cryptg_> dimentions 3'x3'
[22:33:29] <Tom_L> ballscrew
[22:33:35] <cryptg_> mainly wood/light use of aluminum
[22:34:18] <cryptg_> alright i was thinking ball screw too, just wondering what was the normal here
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[22:34:52] <cryptg_> i was orignally going to make the mpcnc model, but upon thinking about it i am going to aim for something more solid
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[22:36:22] <cryptg> somehow i timed out
[22:36:28] <Tom_L> http://tom-itx.no-ip.biz:81
[22:36:35] <Tom_L> that's what i did
[22:36:54] <cryptg> hmm
[22:36:58] <cryptg> nice
[22:37:06] <XXCoder> mpcnc is mostly toy
[22:37:12] <XXCoder> can do plastics and wood maube
[22:37:47] <cryptg> im debating whether i should make the y axis like yours or make it so the gantry is the one that moves instead
[22:38:12] <XXCoder> both have benefits and negatives
[22:38:33] <XXCoder> since you want squarish workspace router type is good
[22:38:41] <XXCoder> now fixed gantry or not..
[22:38:58] <cryptg> haha
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[22:39:30] <cryptg> well fixed gantry i could potentially get less gantry deflection
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[22:43:22] <ryptggg> Freenode not cooperating
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[22:43:58] <ryptggg> Wow
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[22:44:52] <cryptg> Dam
[22:44:58] <Tom_L> are you registered?
[22:44:59] <cryptg> Am I back?
[22:45:00] <Tom_L> yes
[22:45:02] <cryptg> Yes
[22:45:07] <Tom_L> hmm
[22:45:13] <Tom_L> bad connection
[22:45:15] <cryptg> I had to switch to my phone
[22:45:22] <cryptg> That's odd
[22:46:00] <cryptg> Speed test =17ms ping
[22:46:07] <cryptg> 100m down
[22:46:57] <cryptg> Oh well
[22:46:58] <cryptg> Tom what steppers are you running?
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[22:48:31] <Tom_L> https://www.ebay.com
[22:48:59] <Tom_L> gecko drivers
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[22:49:29] <cryptg> I see
[22:49:59] <cryptg> I'm still going for closed loop, I was wondering about holding torque
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[22:50:24] <cryptg> Answered my question nicely though
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[22:55:47] <cryptg> Hmm
[22:56:23] <cryptg> Looking at that deal, im almost tempted to get them and add my own encoders....
[22:56:48] <Tom_L> those come in .250" and .375" shaft if you look around
[22:56:57] <Tom_L> i'd rather have the .375" shaft
[22:57:02] <Tom_L> which is what those are
[22:57:18] <cryptg> I do prefer the bigger ones as well
[22:57:29] <Tom_L> the other end is still .250"
[22:58:07] <cryptg> I can't find any with encoders built in though
[22:58:07] <cryptg> Looks like open loop only unless some tomfoolery is had
[22:58:19] <cryptg> I'm up for it...
[22:58:29] <Tom_L> i'd be hard pressed to stall them
[22:59:06] <Rab> Stepper budget + encoder budget = bigger stepper budget, closed loop not needed.
[22:59:34] <Tom_L> those were the largest nema23 i could find
[23:02:05] <cryptg> Alright I'm sold :D
[23:02:43] <cryptg> I have these from a previous project
[23:02:45] <cryptg> Signswise 600p/r Incremental Rotary Encoder Dc5-24v Wide Voltage Power Supply 6mm Shaft https://www.amazon.com
[23:03:19] <cryptg> I was thinking or gearing them 1:1 and finding a closed loop controller,
[23:03:37] <cryptg> But I hadn't noticed the 600 pulses per rev
[23:03:39] <Tom_L> i'm only running mine at 2.5A too
[23:03:57] <Tom_L> that's where the drivers were set for the previous steppers i had
[23:04:06] <cryptg> All I see are drives that use 1000 pulses so I'm unsure if they'll play nice
[23:04:26] <cryptg> Nice!
[23:04:42] <cryptg> So, plenty of torque then.
[23:04:59] <Tom_L> i'm using gecko 203v
[23:05:13] <cryptg> OK
[23:05:21] <Tom_L> https://www.geckodrive.com
[23:05:29] <Tom_L> you can get cheaper chinese ones
[23:06:48] <cryptg> Ok
[23:07:05] <Tom_L> the geckos are good though
[23:07:29] <cryptg> Since this is hobby project for now I'll probably go with the chinesium until further notice
[23:07:50] <Connor> Any one know if the coolant pumps found in Band Saws have some sort of float switch? I picked up a used horizontal saw.. it has a coolant pump.. but doesn't work. I've not put any coolant in it yet either.. so, I wasn't sure if that was the issue or not.
[23:08:33] <cryptg> Band saws use a flood coolant?
[23:08:43] <cryptg> We use mist tipically
[23:09:12] <cryptg> Cutting oil*
[23:09:12] <Connor> It's what it came with.
[23:10:00] <cryptg> Any way you can shoot me a picture of the pump?
[23:10:16] <cryptg> And the band saw in general
[23:11:17] <Connor> https://www.ebay.com
[23:11:26] <Connor> One sold on ebay that looks very much like it..
[23:11:55] <Connor> maybe not the exact model.. It's still in the saw.. I've not pulled it yet.
[23:12:10] <Connor> I don't see a float switch.
[23:12:18] <Connor> and I don't hear anything when I turn it on.
[23:12:43] <cryptg> It shouldn't have one
[23:13:29] <cryptg> Open the panel on the side and check to see if the power is direct to the motor
[23:14:51] <cryptg> Assuming the motor doesn't turn, grab a dmm and check for resistance of the coil
[23:15:01] <Connor> Has it's own switch.. coming off the saw switch. It looked okay connection wise.. I'll double check that it's functional this week.
[23:16:26] <cryptg> Could be a bad switch too, the contacts can get gunned up depending how often it's switched on
[23:16:54] <cryptg> A multimeter will be your friend
[23:17:56] <cryptg> Step 1 make sure there is power input and output at the switch
[23:18:40] <cryptg> Good luck
[23:19:17] <cryptg> OK guys thanks for the info!
[23:32:31] -!- veek has joined #linuxcnc
[23:35:49] <cryptg> Hey Tom
[23:36:13] <cryptg> https://rover.ebay.com
[23:37:04] <cryptg> 3.5x the price 😖
[23:38:06] <XXCoder> wow! you guys know about youtube channel named 11foot8? its about bridge that trucks keep smashing into
[23:38:27] <XXCoder> apparently it captured factory explosion yeserday
[23:38:44] <cryptg> Wow
[23:39:03] <XXCoder> most recent is https://www.youtube.com
[23:39:12] <XXCoder> I dont think guy will upload explosion one
[23:40:16] <cryptg> No wonder I couldn't find it
[23:40:43] <XXCoder> one guy died in that explosion I dont think he will upload it. i wouldnt
[23:41:17] <cryptg> Ah makes sense
[23:42:04] <XXCoder> i dont know why people keep getting smashed into that bridge
[23:42:25] <XXCoder> it happens so often that after they added very strong iron bar to protect bridge, they had to replace it after a year.
[23:43:19] <cryptg> It's an odd height for a bridge with so much traffic
[23:43:29] <XXCoder> its old
[23:43:36] <cryptg> The should dig the road deeper
[23:43:50] <XXCoder> 4 inches higher bridge, or land 4 inches lower yeah
[23:44:24] <cryptg> Would solve many headaches in the long run imho
[23:44:33] <XXCoder> yeah.
[23:44:49] <cryptg> Hey what's your opinion on the chinesium stepper drivers
[23:44:51] <XXCoder> either of those solutions is quite expensive
[23:44:57] <XXCoder> which one?
[23:44:59] <cryptg> Like the TB660
[23:45:07] <XXCoder> tb660 is ok
[23:45:09] <cryptg> Tb6600*
[23:45:22] <XXCoder> my first one was tb6560. it sucked lol
[23:45:35] <XXCoder> tb6600 runs way better but its still chinese
[23:45:50] <XXCoder> man that semi trailer got destroyed
[23:45:59] <XXCoder> $10,000 gone
[23:46:52] <cryptg> 10k? I've seen dual unit reefers get hit there😖
[23:46:58] <XXCoder> i shudder to think when someone does same but with standard transport box
[23:47:12] <XXCoder> 10k was wild guess really
[23:47:46] <cryptg> A flat bed cost us around that price at work
[23:47:47] <XXCoder> them transport boxes is made from hard metal. it'd wheck protective bar, and probably jkill bridge too if guy was speeding
[23:47:50] <cryptg> No enclosure
[23:48:09] <cryptg> Haha
[23:49:13] <XXCoder> https://www.youtube.com 7 years old. it predates bar
[23:51:55] <pink_vampire> hi
[23:52:16] <XXCoder> hey pink
[23:52:28] <pink_vampire> hi XXCoder
[23:53:20] <cryptg> Hi