#linuxcnc Logs
Jan 23 2019
#linuxcnc Calendar
12:12 AM * fragalot is snowed in
12:16 AM fragalot: ._.
12:26 AM alutard: fragalot: crawl out of a window and shovel away!
12:27 AM fragalot: Sure, but I still can't get to work
12:27 AM alutard: did they tell you that you have to make it?
12:27 AM alutard: you called da boss and explained?
12:27 AM alutard: it's standard procedure.
12:28 AM fragalot: well i'm giving a training to ~15 of our engineers that have flown in yesterday
12:28 AM fragalot: so.... I'mma figure something out
12:28 AM fragalot: dog sled or something like that :D
12:29 AM alutard: or just shovel away and drive the car
12:29 AM alutard: or crawl to public transport
12:29 AM alutard: call a taxi
12:34 AM alutard: if you or anyone else misses me, i can be unreached at thealucardfromhell@Hotmail.com for further negotiations ;0
02:20 AM Deejay: moin
04:17 AM foadsf: hey guys I was wondering if you could take a look at my question here: https://www.reddit.com/r/hobbycnc/comments/ait2c0/how_to_use_a_stepcraft_cnc_machine_for_automatic/
04:19 AM Wolf__: install and boot LinuxCNC from a portable drive
04:41 AM rmu: foadsf: look if your controller supports g38.2
04:44 AM jthornton: morning
04:45 AM foadsf: @rmu sur eI will ask that. but what is it? would you be kind to geve me a link to learn more?
04:46 AM rmu: foadsf: http://linuxcnc.org/docs/html/gcode/g-code.html#gcode:g38
04:47 AM Wolf__: morning jt
04:47 AM rmu: foadsf: i don't know how "standard" G38 is with other controllers, but at least the usual hobby-suspects like mach and grbl do support it
04:48 AM foadsf: @rmu what is grbl?
04:48 AM rmu: foadsf: linuxcnc needs its own dedicated computer. connecting USB stepper interfaces to linuxcnc is not supported and will not work.
04:48 AM rmu: foadsf: grbl is a CNC controller based on AVRs (arduino)
04:50 AM foadsf: @rmu so you are telling me that I need to ask for direct interface? is it called serial port?
04:51 AM Wolf__: stepcraft says that it works with linuxcnc
04:51 AM rmu: Wolf__: link?
04:52 AM foadsf: @Wolf_ yeah I have seen some instructions to get stepCraft working with LinuxCNC I will dig into them
04:53 AM Wolf__: “Modular control electronics with stan"dard USB port. Parallel port and 4-axis are optional
04:53 AM Wolf__: that explains that lol
04:54 AM rmu: this stepcraft thingi looks like you typical stepper motor "käsefräse" router. sure you can make it work with linux. either with parallel port and a breakout-board and stepper drivers, something like a gecko g540, or more sophisticated configurations.
04:56 AM foadsf: would guys be kind to also mention these information in the Reddit post?
04:57 AM Wolf__: they probably dont know the setup
05:10 AM rmu: to paraphrase winston churchill: no reddit. definitely no reddit.
05:10 AM Wolf__: lol
05:14 AM rmu: no i mean it. but perhaps some sort of FAQ regarding what machines can be connected and how has to be improved. would make more sense for me to contribute there.
05:32 AM Tom_L: morning
05:32 AM Tom_L: 19, Hi 43
05:34 AM jthornton: 51°F high 23°F
05:34 AM Deejay: -3°C
05:35 AM Tom_L: got a light blanket of snow last evening
05:35 AM jthornton: raining here
05:36 AM rmu: snowing, -5°C
06:16 AM Loetmichel: anyone a suggestion whats the correct drill size for cutting an M2 thread in alu? 1,6mm?
06:25 AM rmu: probably depends on the tool.
06:26 AM rmu: cutter probably 1,6mm, "gewindeformer" larger
06:27 AM Loetmichel: standard 1-pass cutter
06:44 AM foadsf: I wrote this: https://www.reddit.com/r/CNC/comments/aizatc/free_and_open_source_camcnc_software/
06:56 AM srk: FreeCAD Path workbench should be on top of that list :)
06:56 AM srk: also it uses libarea and parts of heekscam
06:57 AM srk: heeks* stuff is mostly dead and quite painful to use
07:12 AM rmu: and it seems julian todd is active in freecad path development (http://www.freesteel.co.uk/wpblog/frontpage/)
07:23 AM srk: made with freecad https://wiki.base48.cz/File:Anqc.jpeg
07:24 AM srk: and excellent path! :)
09:04 AM FinboySlick: syyl: What do you mean all the best stuff is made in Japan? I thought it was Germany?
09:35 AM syyl: back to the future reference ;)
09:36 AM Tom_L: the best stuff is copied in china
09:40 AM FinboySlick: syyl: Good save.
09:41 AM syyl: and i have the highest respect for japanese made goods
09:41 AM syyl: if i had to buy a new vmc today and money was secondary, it would probably be something from japan
10:30 AM Wolf__: totally syyl’s fault that I picked back up my project to add a stepper drive to index my rotary table lol
10:31 AM Wolf__: pcw_home : I have a question about the 7i96 input/output pins
10:32 AM pcw_home: Yes?
10:35 AM Wolf__: first one is simple, and I think I know the answer already, start input to my plasma cutter says “18v DC open circuit voltage at start terminals. requires dry contact closure to activate.” I can run that with the output no problem right
10:36 AM pcw_home: Yes that should be fine
10:37 AM Wolf__: other part was the xfer start cnc machine motion output from the plasma box, but I need to find the manual page its on first
10:53 AM `Wolf: grr, main computer locked up on me go figure
11:02 AM `Wolf: pcw_home, https://www.dropbox.com/s/ww6cg6si2otmnhp/PM1000%20ops%20804290r2-cnc.pdf?dl=0 last page of that shows the xfer thing, not sure on how to input that to the 7i96
11:20 AM fragalot: 'sup
11:36 AM gloops: hmm we might be seeing the Queen in parliament
11:36 AM gloops: most unusual
11:38 AM fragalot: fusion 360 does not like it when you accidentally enter a pattern of 100x1000 holes
11:39 AM gloops: the ERG group has promised to evoke 'Prorogation' if any bill is passed to stop or delay Brexit - ancient law where the monarch turns up at parliament and shuts it down
11:40 AM pcw_home: Wolf: That's just a contact closure so If 7I96 input common is 24V common then +24V --> Plasma pin 12 --> Plasma pin 14 --> 7I96 input
11:43 AM Wolf__: ok, kinda what I thought, so just need to figure out which pin on the plasma is switched and use the other as the common on the 7i96 input?
11:44 AM pcw_home: it looks like its just a contact closure between pins 12 1nd 14
11:44 AM pcw_home: s/lnd/and/
11:46 AM Loetmichel: gloops: sounds a bit like what the carrot head is doing in the US right now
11:46 AM Loetmichel: a bit like a kid throwing a tantrum at the sweets counter of the grocery store
11:48 AM Wolf__: pcw_home: actually yeah, looking at the pm1000 service schematic it shows a dry contact relay inside the machine going to yellow and black on the XFER J19
11:49 AM Wolf__: so just wire it up like the rest of the limit switches and ignore the jumper inside the machine
11:49 AM The_Ball: Hi guys, the Mesa manual for 7i84 states that to enable two MPG inputs it should be set to "MODE 2", where is this mode configured?
11:51 AM Wolf__: I’ll have to double check to see if the newer pm65/85 plasma is done the same way, trying to plan for future upgrade =)
11:54 AM The_Ball: Sorry, found it in the docs "sserial_port_N (N = 0 .. 3) [optional, default: 00000000 for all"
11:57 AM pcw_home: The_Ball, yeah the channel numbering is right to left so sserial_port_0=231 means channel 0 mode = 2, channmel 1 mode = 3 and channel 2 mode = 1
11:58 AM gloops: Loetmichel similar kind of thing yeah, but with more ceremony
11:58 AM fragalot: :o after 20 days, my boring head has turned up
11:58 AM fragalot: well, potentially turned up
11:58 AM The_Ball: I only have one 7i77 and one 7i84 so this should do it: CONFIG="num_encoders=4 sserial_port_0=0xxxxx sserial_port_1=2xxxxxxx"
12:00 PM Jymmm: XXCoder: ping?
12:01 PM Jymmm: fragalot: It must have been real bored if it was roaming around all this time. Maybe it should get a hobby and stop being so bored
12:01 PM fragalot: Jymmm: Agreed. it's job is to bore. not to be bored.
12:01 PM fragalot: (minus that stray ')
12:02 PM Jymmm: fragalot: Maybe you need a boar (oink) instead?
12:02 PM * fragalot nods agreeingly
12:03 PM Jymmm: Mmmmmmm bacon!!!
12:05 PM pcw_home: The_Ball: CONFIG="num_encoders=4 sserial_port_0=002xxx
12:07 PM pcw_home: ( assuming the 7I84 is connected to the 7I77s RS-422 expansion connector )
12:11 PM The_Ball: pcw_home, it is yes, one on each connector, why did it end up being only port 0 and the config string "002", are there three channels in use?
12:17 PM The_Ball: fyi 6i25 onbaord -> 7i77, 6i25 expansion -> 8x breakout -> 7i84
12:18 PM Wolf__: pcw_home: thx for the info, gives me some confidence that I’m not going to blow up 7i96 lol =)
12:23 PM pcw_home: The_Ball: The sserial host interface is divided in ports and channels each port can have up to 8 channels, most firmware has a single port (port 0)
12:23 PM The_Ball: oh, and I thought the port referred to the physical port on the board not in the firmware
12:24 PM The_Ball: I'm guessing the 7i77 requires two channels then since it's "002"
12:25 PM pcw_home: so the standard 7i77x2 firmware has a single port sserial port and 6 channels (0=7i77 Field IO, 1 = 7I77 Analog, 2= 7i77 expansion interface )
12:25 PM pcw_home: ( the other three channels are on the second FPGA connector )
12:26 PM pcw_home: you can see this in the pin names (the channel number is one digit of the pin name)
12:27 PM pcw_home: Wolf__ the 7I96 is pretty rugged though connecting >5V to the step/dir outputs will cause pain and suffering...
12:28 PM Wolf__: hah good to know
12:29 PM pcw_home: and the parallel expansion is basically unprotected (assumes a breakout is used)
01:27 PM Jymmm: https://youtu.be/vaDEpiHmM2g?t=523
01:32 PM CaptHindsight: fragalot: did you travel by dogsled today?
01:36 PM fragalot: CaptHindsight: indeed.
01:37 PM fragalot: streets were nicely plowed at the top of the hill, and the "californian drivers" with summer tires were all still stuck at the bottom of the hill
01:37 PM fragalot: so once I made it there (took about an hour for 1km), smooth sailings.
01:38 PM CaptHindsight: a few cm of snow lately here, mostly cold -5C to -20C
01:38 PM fragalot: hovered around 0°C here
01:38 PM CaptHindsight: yeah was similar here for weeks, 10C some days
01:39 PM CaptHindsight: now it looks like siberia till some tim in Feb
01:39 PM CaptHindsight: how much snow did you get?
01:39 PM fragalot: roughly 15cm in my area (which is almost unheard of)
01:40 PM fragalot: normally if we get 15cm, it's lengthwise
01:40 PM CaptHindsight: huh, what we had for snow this week
01:41 PM gloops: decent frost here, -5C maybe
01:41 PM CaptHindsight: first year in the past few where we have had snow that stays for more than a day or so
01:41 PM fragalot: we had a good frost 2 days ago
01:41 PM fragalot: more ice inside my car than outside, lol
01:42 PM CaptHindsight: the auto battery stocks at the stores are low
01:42 PM fragalot: yea...
01:42 PM CaptHindsight: the shelf was almost empty at Walmart yesterday
01:43 PM CaptHindsight: people wait until they don't start one cold morning
01:43 PM CaptHindsight: "worked fine for 8 years"
01:43 PM fragalot: hehe
01:44 PM CaptHindsight: fragalot: did you ever hear more about that powder bed printer for 2+ materials?
01:44 PM CaptHindsight: aerosint or something
01:45 PM fragalot: I did not.. that said, I didn't ask for an update anymore either
01:45 PM CaptHindsight: they haven't really gotten off the ground
01:47 PM CaptHindsight: I have to get around to finishing up the sand paste dispenser and spreader
01:51 PM fragalot: just get a toddler
01:55 PM gregcnc: maybe more snow this weekend
01:57 PM CaptHindsight: cold cold cold
01:57 PM gregcnc: Jymmm https://www.instagram.com/p/BAO9Jlyp4oT/
01:57 PM gloops: nice box https://www.pinterest.co.uk/pin/AVCL6hYVTcgLZB_flZ-cgeTaCtB35wYTlNwiCk_azu9L3VSvmiSrOWQ/visual-search/?x=16&y=11&w=530&h=357
01:57 PM CaptHindsight: high of 3F on Friday
01:58 PM gregcnc: yeah crazy on-off weather
02:50 PM gregcnc: curious height gage https://www.ebay.com/itm/173757094289
02:52 PM CaptHindsight: gregcnc: how do you know if the base is level with the part you are measuring?
02:52 PM CaptHindsight: it would rock if tipped
02:53 PM gregcnc: wouldn't you be using this on a surface plate?
02:53 PM Tom_L: gregcnc, precision machinists jack
02:53 PM Tom_L: :)
02:53 PM CaptHindsight: yeah, why i asked
02:54 PM gregcnc: Oh, I assume you stand on it to make sure the ratchet slips
02:54 PM CaptHindsight: https://www.mechanicalmeasuring.com/wp-content/uploads/2017/09/micrometer-screw-gauge-parts-and-Function.jpg it's a micrometer without the anvil
02:55 PM CaptHindsight: and c-frame
02:55 PM CaptHindsight: well it's only down to 0.001"
02:56 PM gregcnc: might not even have a ratchet, expert inspectors only
02:56 PM CaptHindsight: maybe it's just for soft items?
02:56 PM gregcnc: never seen one before
02:57 PM CaptHindsight: I'm interested to know what it was intended for
02:58 PM Tom_L: https://www.ebay.com/itm/Mitutoyo-Digimatic-Height-Gauge-192-613-10-HD-30-AX-from-Japan-New/283319880586?epid=1523840944&hash=item41f72e4b8a:rk:25:pf:0&checksum=2833198805864656e353e996499bba5a6c47842b72ce&enc=AQADAAAC8BkojIFHYtWT%2BANpG6F7t2FMxwRoIdrpCrVQjRB4GwccX8bL3AtxMywWqQYDpKOGnQ74lPHRy9obpEKxzp6xLAQe4Ra6XTTZpNDT7Q1XmzQe4GGAorQkQ7YqeqjqSM5%2Fc0whceIfvCKvqoZMoZAQE1aLCwQyCZlPdeszjZGcAuHBJ4%2FWXVhe93DTD58z46mZivIf1jsc7VbEQQ4YHj7Nh4BXXaJtyp9ogHsGn
02:58 PM Tom_L: woah
02:59 PM Tom_L: i'd rather have one of those
02:59 PM FinboySlick: That stuff is so asspensive.
02:59 PM gregcnc: yeah I've been looking for a digital, that isn't a fortune
03:00 PM gregcnc: I don't know if the cheap imports are terrible or not
03:02 PM Tom_L: there's a cheaper version listed for $570
03:02 PM FinboySlick: I was watching a few DMG corporate videos and they keep bragging about all their mills having 'direct reading' as standard. Essentially a glass scale on every axis part of the servo loop. I was wondering how feasible it would be to 'ghetto' one of those and if so, how much of a gain it would provide.
03:03 PM XXCoder: Jymmm: pong
03:03 PM Tom_L: FinboySlick looks like about a hundred bux an axis
03:04 PM FinboySlick: Tom_L: Would it be fast enough to use as a servo encoder though or would you have to run it in parallel?
03:04 PM Tom_L: https://www.ebay.com/itm/NEW-SINO-KA300-Linear-Glass-Scale-Linear-Encoder-USA-Seller/173505939894?hash=item2865c289b6:m:mez4BSeBSTliOcgCJEskwfg:sc:USPSPriority!67213!US!-1:rk:7:pf:0
03:04 PM Tom_L: no idea
03:04 PM gregcnc: Aren't there a few linuxcnc machine running with scales?
03:04 PM Tom_L: yes
03:05 PM Jymmm: XXCoder: On youtube, are you able to CC for things in russian by chance?
03:05 PM XXCoder: i saw russia captions before so I guess yes
03:05 PM Jymmm: XXCoder: The captions are very limited to as much as he's actually speaking in the video... https://www.youtube.com/watch?v=Uv0ir930KBY
03:06 PM Tom_L: https://www.ebay.com/itm/2-Axis-TTL-Linear-Glass-Scales-14-28-Digital-Readout-DRO-5um-CNC-Milling-Lathe/202562120100?hash=item2f29a4a9a4:g:vgkAAOSwliFcNWRL:sc:FedExHomeDelivery!67213!US!-1:rk:3:pf:1&frcectupt=true
03:06 PM Tom_L: 2 axis kit
03:06 PM FinboySlick: Jymmm: They need AI to compensate for the vodka intake too ;)
03:06 PM Jymmm: FinboySlick: lol
03:07 PM XXCoder: video has english captions so it defaulted to that
03:11 PM CaptHindsight: FinboySlick: I have a ton of glass scales if you are interested
03:12 PM FinboySlick: Mostly just brain-shuffling. I won't be doing any cool stuff until I'm done with the house-building.
03:12 PM FinboySlick: And I'm already in way over my head.
03:20 PM XXCoder: glass scales?
03:21 PM CaptHindsight: I have a ton of Renishaw and Accurite scales, mostly analog 1vp-p
03:23 PM CaptHindsight: XXCoder: look at Tom_L link ^^
03:24 PM XXCoder: ya saw, linear glass scales. interesting
03:24 PM CaptHindsight: i wonder how reliable the Chinaco glass scales are?
03:24 PM CaptHindsight: they are glass
03:24 PM XXCoder: they are surpising cheap
03:24 PM CaptHindsight: I bet all the hardware is just cheap
03:24 PM syyl: they are suprising good
03:25 PM XXCoder: did your company (or company you work for) order a lot of those then decide it have no use?
03:25 PM CaptHindsight: comes with double sidded tape for mounting
03:25 PM CaptHindsight: XXCoder: leftovers, machine pulls etc
03:26 PM CaptHindsight: motors I never have enough off
03:26 PM CaptHindsight: they seem to just wander off
03:26 PM gloops: does it have that note at the bottom - measurements +-3mm due to variations
03:26 PM XXCoder: lol ok
03:27 PM XXCoder: gloops: i would think thats length of part itself not measuring varance
03:27 PM gloops: lol, yeah probably, slightly alarming for a precision instrument though, its on so many ads
03:27 PM XXCoder: once saw size +- 1 cm, and item was less than one cm. :P was wondering if seller would claim 1 cm - 1 cm = 0.
03:28 PM XXCoder: "your box is totally full of 0 cm length parts, you just cant see em"
03:28 PM gloops: would be an interesting one for trading standards court
03:28 PM XXCoder: got em fine btw
03:45 PM CaptHindsight: outside of China who makes BLDC motors >5KW?
03:47 PM Deejay: gn8
04:06 PM gloops: brook crompton?
04:20 PM wint: I have a question about shop drawings. Anyone here feel opinionated about them?
04:20 PM syyl: i have a lot of opinions on many things!
04:21 PM CaptHindsight: don't waste paper!
04:21 PM CaptHindsight: https://www.alibaba.com/showroom/ecu-vent-plug.html anyone have s source for silicone versions of similar vents?
04:22 PM syyl: drawings on paper <3
04:23 PM wint: syyl are you accustomed to making or using shop drawings?
04:24 PM syyl: sure
04:25 PM CaptHindsight: I only make 3d models, drawings are for the interns
04:25 PM syyl: ha :D
04:25 PM wint: okay have a look at this screenshot
04:25 PM wint: https://i.imgur.com/EMMduLx.png
04:25 PM wint: at top is the 3d
04:25 PM wint: at bottom is the "plan" representation of those elements
04:26 PM wint: I have circled two lines in red
04:26 PM wint: Should those be on the top view?
04:26 PM syyl: yes
04:26 PM syyl: they are an edge
04:26 PM syyl: so they are drawn
04:26 PM wint: or should it be 2 parallel lines for the sides of the vertical fin, with no edges?
04:26 PM wint: You know, I agree
04:26 PM wint: but I'm dealing with colleagues who disagree
04:26 PM syyl: some people leave them out
04:26 PM wint: in my world, that means "someone has to do work
04:26 PM wint: but other tenchical ppl are saying "only put a line if an angle meets it"
04:27 PM wint: honestly with any material, a sero-edge is impossible
04:27 PM wint: *zero-edge
04:28 PM syyl: there is a iso standard for drawings
04:28 PM syyl: i am pretty sure its defined in there
04:28 PM syyl: or a company has their own standard on drawings
04:35 PM Rab: wint, you pose an interesting question. My feeling is that you couldn't call out that feature from the top view, only from the side. So all you're trying to do in the top view is provide a graphical representation for ease of recognition. I think the line is not adequate for that purpose, so it should probably be eliminated.
04:35 PM syyl: tangential edges are drawn
04:35 PM syyl: as a full line
04:35 PM Rab: But I'm no GD&T expert.
04:36 PM syyl: you cant just leave stuff out of a view, that makes things terrible
04:36 PM wint: huh. ISO 128.
04:36 PM wint: I'll look into that
04:36 PM wint: thanks
04:43 PM andypugh: syyl: Have you seen the pics of my CNC UPA3?
04:43 PM syyl: yes
04:43 PM syyl: you are crazy
04:44 PM syyl: moderately crazy at least
04:44 PM andypugh: It seemed like a good idea at the time, it would have made it easy to machine spherical cavities, for example.
04:44 PM CaptHindsight: hey andypugh
04:44 PM syyl: you need that all the time, right? :D
04:45 PM andypugh: Well, not yet :-)
04:45 PM andypugh: Hi CaptHindsight
04:46 PM CaptHindsight: was working on a friends Ford yesterday, broke down late at night, was impressed by the materials used
04:47 PM andypugh: I can’t claim any credit for the materials, but I am well positioned to cause breakdowns :-)
04:47 PM CaptHindsight: 2010 CV police model, looked like a aluminum subframe under the front suspension
04:48 PM andypugh: Possibly Jaguar parts
04:48 PM andypugh: (Not sure of the time scale there. There were some shared floor-pans.
04:49 PM CaptHindsight: possibly cast aluminum control arms
04:49 PM CaptHindsight: 2010
04:49 PM CaptHindsight: http://www.wikiwand.com/en/Ford_Crown_Victoria_Police_Interceptor
04:49 PM andypugh: Our protoypes had CNCed-from-solid versions of those control arms. Looked expensive :-)
04:50 PM andypugh: (Not that model)
04:50 PM CaptHindsight: most difficult starter location i have ever encountered
04:51 PM CaptHindsight: would have been easy if i didn't have a car already on the my lift
04:51 PM andypugh: Don’t ask me why I was reminded of this now… But have you seen the Sentinel steam-wagon crank where the differential is inside the crank?
04:53 PM andypugh: Pics 12 and 13 here are a model version. (The real one is hidden inside the crank case so rarely seen)
04:53 PM andypugh: http://www.msmec.org.uk/index.php?page=brighton-model-world-2016-2
04:55 PM CaptHindsight: the last Fords I worked on were 73 Mustangs
04:55 PM CaptHindsight: not too familiar with steam engines, my brother wishes he were born 200 years earlier since he loves them
04:59 PM Jymmm: Best use of conduit I've ever seen.... https://www.youtube.com/watch?v=duv6CVWNNLs
05:03 PM CaptHindsight: https://imgur.com/gallery/aKUdyJX Wood joiner w/sound
05:04 PM CaptHindsight: Jymmm: PhD
05:04 PM Jymmm: CaptHindsight: ?
05:05 PM CaptHindsight: post hole digger
05:05 PM Jymmm: CaptHindsight: that cutter is vicious!!!
05:05 PM Jymmm: CaptHindsight: conduit water well and conduit pump too
05:07 PM CaptHindsight: Jymmm: how deep is your water table?
05:07 PM CaptHindsight: aren't you in Mountains/Hills?
05:08 PM Jymmm: CaptHindsight: I really don't know, but have been told that there are two lava caps