#linuxcnc Logs

Jul 09 2019

#linuxcnc Calendar

12:17 AM Elmo40: one sits and shakes. other is a rolling barrel
12:23 AM ItsFlipp: sure, but what about in relation to e.g. noise levels, tolerances, etc?
12:49 AM roycroft: tumblers are generally quieter
01:32 AM ItsFlipp: general question that I fully expect to be "it depends", but do people generally do clearance tolerances in CAD or CAM steps?
01:32 AM ItsFlipp: e.g. if a push-fit tolerance is required, is it built into the CAD model by offsetting coincident faces by, say, .001"
01:33 AM ItsFlipp: or is it done in CAM where if a .25" plug is going into a .25" hole, an extra .001" is taken off the hole?
01:36 AM roycroft: yes
01:36 AM roycroft: "it depends" is the correct answer
01:38 AM ItsFlipp: I've found a workflow that somewhat works is that, if I have the STEP model, if I create a derived design as a separate design and then offset the faces in the direction the tolerances are required
01:38 AM ItsFlipp: but that seems very... workflow/program specific
02:40 AM gloops: drawing up plan for an observation beehive, dont know if ill get to run it today
03:40 AM Loetmichel: soo, got the first printer mounted and placed in the rack... http://www.cyrom.org/palbum/main.php?g2_itemId=17409&g2_imageViewsIndex=1 now to mount the second, place it where the keyboard is now, get octoprint running on the PC, make a dry box for the filament rolls above the printers and done. :-)
04:14 AM Loetmichel: hmmm... "2mpix"... sensor or interpolated? what do you guys think? -> https://www.ebay.de/itm/Mini-USB-2-0-PC-Camera-HD-Webcam-Camera-Web-Cam-For-Laptop-Desktops-HO-W0HWC/273882259151
04:47 AM jthornton: morning
04:56 AM Tom_L: morning
04:56 AM XXCoder: heys
04:56 AM XXCoder: jthornton: shop is still half leds lol wonder whats happening there
04:57 AM jthornton: maybe they are waiting to see if you get used to them...
04:57 AM XXCoder: wonder how they evaluate that
04:58 AM XXCoder: i work in old light area so wouldnt know
04:58 AM jthornton: everyone stops complaining lol
05:05 AM jthornton: https://forum.linuxcnc.org/49-basic-configuration/36936-feixt#138938
05:06 AM jthornton: I'm thinking English is not his native language...
05:07 AM Tom_L: doesn't smell like chinglish
05:07 AM Tom_L: foreign cause it's metric
05:11 AM Tom_L: sounds like max velocity or acceleration is off or something like that
05:11 AM XXCoder: jt possibly. dim workspace sucks so hope not
05:12 AM XXCoder: would be fine if they doubled up led lights
05:12 AM Tom_L: or something in the [DISPLAY] override section
05:13 AM Tom_L: XXCoder put that in the suggestion box
05:14 AM gloops: just put a new cap on spindle moulder, got jammed last night, luckily featherboard stopped serious kickback, switched back on - no power in motor
05:14 AM Tom_L: fuse?
05:14 AM gloops: found a big cap in a box stuck it on - yahoo
05:15 AM gloops: there was power to the motor it was turning - just very weak
05:15 AM gloops: only thing is it seems a lot more powerful than it was before now haha
05:16 AM gloops: ought to buy proper cap for it
05:19 AM Tom_L: maybe the original china cap was undersize
05:20 AM Tom_L: doesn't run any hotter than before?
05:22 AM gloops: not run for any time yet, i did notice the motor was hot when it failed last night - not chinese though its german
05:22 AM gloops: might have been old cap on its way out, thats why it jammed
05:58 AM Loetmichel: *MAAAAN* the tools i have to work with... tried to open a shipping crate with a screwdriver (used it as a crowbar)... then THAT happened: http://www.cyrom.org/palbum/main.php?g2_itemId=17412&g2_imageViewsIndex=1 ... and thats a 6mm screwdriver shaft... tried it afterwards: i can bend it back with my bare hands... how is that possible with steel???
06:16 AM jthornton: low carbon steel is pretty soft...
06:17 AM Loetmichel: i noticed
06:17 AM Loetmichel: arent screwdrivers meant to be hardened tips though, and tool steel/high carbon steel?
06:29 AM jthornton: quality tools yea
06:41 AM gloops: that was in the days when tools were designed with a task in mind, these days theyre designed for repeat purchases when they snap
07:14 AM Valen: if the tip is too hard on it though you can snap the tip off, done that once or twice with cheapish ones
07:14 AM Valen: the end of the thing explodes basically, only on rusted in screws when you are leaning on them with all your might of course
07:14 AM * Valen has good screwdrivers now
08:18 AM * Tom_L gives Loetmichel a crow bar and an instruction manual
08:20 AM Loetmichel: Tom_L: i was lacking a crow bar
08:20 AM Loetmichel: just for reference: the knife of a leatherman wave hat NO problem to open that box without bending or breaking.
08:20 AM Loetmichel: so much for the screwdrivers steel strenght
08:50 AM FinboySlick: Loetmichel: Using the wrong tool for the job? How un-german of you... :)
09:05 AM Loetmichel: FinboySlick: old german saying: "if you only have a hammer everything looks like a nail"
09:05 AM Loetmichel: .-)
09:17 AM FinboySlick: Loetmichel: Anton Chigurh disagrees! https://www.youtube.com/watch?v=riyC8AJNQZs
09:20 AM perry_j1987: morning
10:05 AM gloops: motor with oversize cap ran well - for a while lol
10:05 AM gloops: started gettin smelly, then started smoking
10:06 AM perry_j1987: what are you "fixin"
10:06 AM gregcnc: how much oversize?
10:12 AM gloops: damn internet dropped off
10:13 AM gloops: cap was about 4 inch too long and about 1 inch diameter too big, got a smaller one on now, motor seems to be running normally again...
10:14 AM Rab: Cap as in capacitor?
10:14 AM gloops: yeah
10:15 AM Rab: I am not sure length and diameter are the primary figures of merit.
10:15 AM gloops: well it looked like the best bet in a box of old junk
10:16 AM gloops: shaper never ran as fast lol
11:12 AM Deejay: hi
11:26 AM skunkworks: https://www.youtube.com/watch?v=YZI7Q7O_PcY
11:28 AM Loetmichel: gnhihi... just went to the car mechanic to get an appontment for the exhaust leak and the parking brake repair... opened the thick steel (fireproof) door to the shop, mechanic looks up: "Hi! Exhaust repair? I could hear you parking thru the closed door." ;)
11:38 AM gregcnc: irony... driving school in town has a car with "student driver" in bright vinyl letters on every side of the car, no turn signal apparently didn't look almost sideswipes another car coming to a stop light. No student in the car.
12:31 PM skunkworks: http://electronicsam.com/images/greenmachine/IMG_20190708_225437.jpg
12:35 PM skunkworks: http://electronicsam.com/images/greenmachine/IMG_20190708_194306.jpg
12:43 PM FinboySlick: skunkworks: Would it be possible to shorten the holder further and gain some z space with the probe?
12:44 PM Loetmichel: gregcnc: normal
12:44 PM Loetmichel: my driving school teacher was a TERRIBLE driver if on the wheel himself
12:45 PM Loetmichel: not "uneducated" but "uncaring" if you know what i mean
01:01 PM skunkworks: FinboySlick: sure - but I don't think I have z problems...
01:03 PM skunkworks: FinboySlick: http://electronicsam.com/images/greenmachine/20180921_205733.jpg
01:03 PM skunkworks: z all the way down..
01:03 PM skunkworks: the probe does touch the table... :)
01:04 PM FinboySlick: I see.
01:07 PM skunkworks: FinboySlick: I raised the z column by about 5 inches... It was way to close..
01:07 PM skunkworks: now I can put a small vise and still have room
02:06 PM Tom_L: skunkworks, finally watched that this morning
03:09 PM Connor: Anyone know where to get oil grove cutting endmills? They're not the same as ball endmills.. They can be rounded or flat bottomed, but, then have a rounded edge vs a sharp edge..
03:10 PM Deejay: gn8
03:11 PM methods_: Connor: you want a bull mill?
03:12 PM XXCoder: bull nosed endmills
03:12 PM Connor: No.
03:12 PM Connor: Not the same. Thinkg of a upside down bell shape.
03:13 PM Connor: bull or ball will leave a hard edge..
03:13 PM XXCoder: so starts like radius cutter and ends like bullnose endmill
03:13 PM Connor: oil groove cutter leaves a radius
03:13 PM Connor: right
03:14 PM methods_: ah tapered bull mill
03:14 PM Connor: This is the only place I've seen that has them.. and they're not in the states.. https://www.schleiftechnik.com/en/oil-groove-milling-cutter-model-c,113-81
03:15 PM methods_: hmm interesting
03:16 PM Connor: The reason is.. the sharp edge tends to scrape away the oil.. so, the lead in/out prevents that.
03:16 PM Connor: https://www.schleiftechnik.com/thumbs/3/produkte/109920/skizze/Schmiernut2WEB.420-0-0.jpg
03:18 PM Connor: The other thing is.. how to figure out the size of the grooves and the radius.. :)
03:21 PM Connor: I'm thinking 2mm radius, 1mm depth, 4.5mm lead-in radius
03:21 PM methods_: yeah no idea i've never seen those before or used them
03:21 PM methods_: that company seems to be the only one making anything like that
03:39 PM Connor: Anyone else done oil grooves in saddles or gibs?
03:39 PM Connor: https://www.youtube.com/watch?v=BTeoIT-l68s&t=1806s
03:39 PM Connor: That guy goes over it pretty good.. Just wondering if anyone had any more details
03:53 PM gregcnc: that's a very specific cutter, not common at all
03:53 PM gregcnc: standard hydrodynamics apply, but I'm not sure that grooves like that are actually common
04:00 PM Rab: Seems like you could approximate that profile with a ball nose end mill followed by a tiny corner rounding end mill.
04:25 PM -!- #linuxcnc mode set to +v by ChanServ
04:40 PM andypugh: I wonder how hard it is to hack the firnware of a digital dial-indicator?
04:40 PM perry_j1987: what do you need it to do
04:40 PM andypugh: https://www.instructables.com/id/Radius-Measuring-for-Reverse-Engineering/
04:41 PM perry_j1987: they are easy to interface an arduino or an esp8266 with
04:41 PM andypugh: There is a fair chance that any motorcyclists in the room will recognise the name of the author.
04:47 PM Rab: Those things are just one glob-top IC, probably without any flash...you'd have better luck interfacing your own MCU with the capacitive sensor. Better to use the existing interface.
05:05 PM andypugh: Are they even capacitive? I was wondering if they might use a rotary encoder.
05:05 PM Tom_L: andypugh you don't have a set of radius gages?
05:06 PM andypugh: I do, but but they stop at 1/2”
05:06 PM Tom_L: hmm
05:07 PM andypugh: https://www.amazon.co.uk/CGOLDENWALL-accuracy-digital-indicator-Measurement/dp/B0127I4KHQ measures radii from 6.5 to 700mm
05:08 PM Rab: I assumed they work the same as the digital calipers, but I don't actually know for sure.
05:10 PM Tom_L: on micrometers possibly a highly accurate encoder on the shaft?
05:10 PM Tom_L: no idea really
05:12 PM _unreal_: sweet my milling bits just showed up in the mail
05:12 PM _unreal_: 10x titanium 200 degree 0.3mm tip bits :)
05:12 PM _unreal_: "" for pcbs "" I hope
05:13 PM _unreal_: has "china" plastered all over the case so we shall see
05:14 PM Tom_L: andypugh possibly some have a serial interface
05:14 PM Tom_L: my old calipers did
05:15 PM Tom_L: https://sites.google.com/site/marthalprojects/home/arduino/arduino-reads-digital-caliper
05:16 PM andypugh: Yes, hooking in to the serial interface is an option, but I doubt that the coin cell would run an arduino + display for long.
05:17 PM Tom_L: use an alternate power source for the avr
05:17 PM andypugh: But then it’s a clunky mess.
05:17 PM Tom_L: how many times are you gonna use it?
05:17 PM andypugh: Oh, never.
05:17 PM Tom_L: heh
05:17 PM andypugh: That’s hardly the point!
05:18 PM andypugh: (Actually, I do a fair bit of reverse-engineering, it would be quite a handy thing to have at times)
05:18 PM Tom_L: one of those 'can i do it' things ehh
05:18 PM Tom_L: might be easier to use your faro arm
05:18 PM andypugh: Ah, yes. I really should finish that.
05:22 PM Tom_L: https://www.greatgages.com/collections/digital-indicator-to-pc-interface-packages
05:22 PM Tom_L: about the same cost as one you'd have to hack
05:24 PM Tom_L: do the arc math on the pc for your holder
05:24 PM Tom_L: you could have more than one holder spaced differently
05:24 PM andypugh: Yes, like the software in the original instructable you mean?
05:25 PM Tom_L: yeah
05:26 PM Tom_L: i could see where you might want a holder with closer spaced points
05:27 PM Tom_L: no i didn't read the entire article yet
05:29 PM Tom_L: you could make the ball ended probes or get ball stylus tips
05:29 PM Tom_L: probably alot more cost though
05:29 PM Tom_L: use QTPyVCP and roll your own :)
05:52 PM jthornton: geez we are going to the Lake of the Ozarks this weekend and it's going to be super hot!
05:57 PM Tom_L: take a big cooler
05:57 PM jthornton: we'll be on the bikes...
05:58 PM jthornton: with the can am trailer behind...
05:59 PM Tom_L: group or just u 2?
06:02 PM jthornton: the group, there are 3 couples and 4 bikes
06:02 PM Tom_L: sounds like fun other than the heat
06:02 PM jthornton: Pearl rides her little Harley sometimes
06:02 PM jthornton: yea, it will be fun except for the heat
06:08 PM perry_j1987: thermal shert
06:08 PM perry_j1987: shirt
06:08 PM perry_j1987: welders use
06:08 PM perry_j1987: with the water tubes :)
06:13 PM andypugh: 3 couples and 6 bikes is the only way that everyone can have fun. Carrying a pillion is horrible, and being a pillion is worse. :-)
06:13 PM jthornton: hook it up to the radiator of the goldwing
06:14 PM jthornton: two of the ladies only like to ride and what could be better than a 2 wheel couch with a stereo or in the case of the other a 3 wheel couch
06:20 PM JT-Shop: well crap, I replaced the actuator and the transfer case control module but the actuator still does not work...
06:22 PM andypugh: Fuse? :-)
06:28 PM JT-Shop: checked them first but a recheck is in order, also traced the wires out looking for wood rat damage
06:57 PM Tom_L: trade it in.
06:57 PM enleth: how much angular play do you think there should be in a brand new never used Bridgeport spindle dog clutch?
06:58 PM enleth: I'm working on a replacement and I'm not sure how much clearance to include between the teeth
06:58 PM Tom_L: i've got a feeling less than what you're experiencing
06:58 PM enleth: that's for sure, the clutch I have is chowdered up pretty good
06:59 PM enleth: but I can't find any dimensioned drawings of the original part, or any info on factory specs for the clutch fit
07:01 PM Tom_L: can't help much on that
07:01 PM Tom_L: my bud rebuilt his but i wasn't around
07:03 PM enleth: eh, let's try 1deg of angular separation between teeth
07:03 PM enleth: it looks fine on the drawing
07:04 PM andypugh: Is there any chance that the design clamps up tight?
07:05 PM andypugh: That’s fairly easy to achive with a dog clutch if you make it like a Hirth coupling.
08:07 PM perry_j1987: gah went on youtube and now i found some more tools i need to make for my lave...
08:07 PM perry_j1987: lathe
08:20 PM Tom_itx: skunkworks, https://youtu.be/5QcYX240U2I
08:24 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/thread_mills/Boring_Mill_Holder.jpg
08:27 PM _unreal_: So if I have done everything right. still STILLL waiting for the damn computer to load. when it loads. and I can test. I now have a speed controller setup on my cnc
08:27 PM perry_j1987: nice
08:27 PM _unreal_: only manual control currently. i have to make a custom voltage to PWM converter
08:27 PM _unreal_: just have not bothered to deal with the arduino
08:28 PM perry_j1987: i was wondering if these VFD's with modbus communciation sendback spindle speed for linuxcnc to use?
08:28 PM _unreal_: !!1 and it works
08:29 PM _unreal_: I ordered this https://www.amazon.com/gp/product/B0789NKJZM/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
08:29 PM _unreal_: VERY very diverse
08:29 PM _unreal_: but its input is PWM based. and my controller is voltage based as far as speeed control
08:30 PM _unreal_: and there is a nice code already made and stuff online I could link you to if interested
08:30 PM _unreal_: That one controller will handle AC and DC
08:30 PM _unreal_: its input does not matter
08:30 PM _unreal_: though I am not sure if it outputs AC?
08:31 PM Tom_L: perry_j1987 some are using modbus so probably so
08:32 PM _unreal_: Sweet
08:33 PM _unreal_: only major things I need to do now. are mill or ETCH a second set of my limit switch signal conversion boards. wiring them into my controller board because its knows + and - limit swichs ends. but I've only wired the machine for mono dual end limit
08:34 PM _unreal_: and the control board has a few buttons that I have run the wires for but not setup a controller for
08:34 PM Tom_L: perry_j1987 http://linuxcnc.org/docs/2.7/html/man/man1/hy_vfd.1.html
08:34 PM _unreal_: ESTOP and play/pause
08:34 PM Tom_L: http://linuxcnc.org/docs/2.7/html/man/man1/hy_gt_vfd.1.html
08:35 PM _unreal_: I also need to wire in the "9pin" serial port socket that I'm using for a plug for my A axis.
08:36 PM _unreal_: I have not used the A axis yet but all I need to do is solve the wiring I setup on my A years ago and then match that on the femail reciver
08:36 PM _unreal_: female
08:36 PM _unreal_: then I can finally have an A
08:36 PM _unreal_: dont know how much I can use it though. It amy not be short enough for my machine to use it?
08:37 PM _unreal_: or I may have to make a custom adapter to loser it?
08:37 PM _unreal_: who knows
08:37 PM _unreal_: So the good news is that everything is working
08:37 PM _unreal_: and I have not broken anything
08:46 PM perry_j1987: ya cause that'd be a good reason for me to switch to modbus
08:46 PM perry_j1987: since i dont have any encoder on this spindle etc
08:50 PM _unreal_: perry_j1987, what type of signal? rs422?
08:58 PM perry_j1987: its a nowforever vfd
08:58 PM perry_j1987: i dont know much about it
08:58 PM perry_j1987: came in the 6040 controller bo
08:58 PM perry_j1987: box
08:58 PM perry_j1987: i think this is the one https://www.docdroid.net/NYibeDM/nowforever-manual-e-100.pdf
08:59 PM _unreal_: perry_j1987, I already have worm fuzzy feelings. first page has chines on it
09:00 PM perry_j1987: ahhh thats how you know i spent less money so i could give it all to the endmill companies instead :P
09:01 PM _unreal_: yes one must not be to picky when sowing one's GREEN to to non endmill companies
09:02 PM _unreal_: So I got 2 things done tonight
09:03 PM _unreal_: got the speed control functional. and I got the opening for my A done and main power wires for the motor run out. 10pm I think its time for food more beer.
09:03 PM _unreal_: and more
09:04 PM _unreal_: you know its odd for all the play. My mill has? I guess the play is really in the FINE movements only. because I've cut a few round parts now and did some spin test's and they are rather well balanced.
09:05 PM _unreal_: so I guess my play is really more in the range of a FULL stroke lets say a 1/16th so thats a 32nd + and -
09:05 PM Tom_L: have you trammed it?
09:06 PM _unreal_: heh by my design. wont make a difference
09:06 PM _unreal_: remember I'm just finishing a machine I built with few tools several years ago
09:06 PM _unreal_: a project I started just a few months before my Xwife announced out of the blue BYBY
09:07 PM _unreal_: Tom_L, MY best bet would be to use the shit out of this. and when I grow tired of it. I'll just buy a machine
09:07 PM _unreal_: HELL I might even use this machine to cut parts for a new machine
09:07 PM _unreal_: it its self is more then big enough to mill any of its own parts
09:09 PM norias: heh
09:09 PM norias: Xwife
09:09 PM _unreal_: .. if I decided to rebuild parts of this machine. I could likely gain 5" on the Y and maybe upto 1" on the X axis and I could gain at least 3" to my Z
09:10 PM _unreal_: That was random norias
09:10 PM _unreal_: but Tom_L I digress I'd likely rather just buy a metal fabbed mill from china for $200
09:10 PM Tom_L: _unreal_, i used my sherline to build my current mill
09:11 PM _unreal_: nice
09:11 PM _unreal_: ya I used a HAND router to HAND machine my current machine
09:11 PM _unreal_: :)
09:11 PM _unreal_: I WAS the cnc machine
09:11 PM _unreal_: LOL
09:11 PM norias: _unreal_: does your Xwife run on Wine?
09:12 PM _unreal_: ahh
09:12 PM _unreal_: I dont know
09:12 PM _unreal_: she lives 4 hours away
09:12 PM _unreal_: and amazingly she took are daughter this summer
09:12 PM _unreal_: ok food
10:03 PM skunkworks: Tom_L: what is that? about .0005"
10:04 PM Tom_L: overall probably .001
10:04 PM Tom_L: or a little less
10:05 PM skunkworks: Have you tried an .125 cutter yet?
10:05 PM Tom_L: i think it's about as good as i can expect on that mill
10:05 PM Tom_L: no, that was a .500 holder i turned out to .625 as a test
10:05 PM Tom_L: i need to make the .500 one tomorrow
10:06 PM Tom_L: i'll use the bigger one on my 3/4" threadmill
10:06 PM Tom_L: it's 5/8" shank
10:07 PM Tom_L: i had one i've been using but it was oversize so i wrapped some shimstock around the cutter shank
10:07 PM _unreal_: ?
10:07 PM _unreal_: .0005 .001? I have no idea what you guys are talking about
10:08 PM Tom_L: https://youtu.be/5QcYX240U2I
10:08 PM Tom_L: that
10:09 PM _unreal_: ahh
10:09 PM Tom_L: skunkworks thanks for the idea
10:09 PM Tom_L: best one so far
10:15 PM skunkworks: of my ideas.. probably.. ;)
10:16 PM Tom_L: i had to be careful not to hit the spindle itself when boring
10:16 PM Tom_L: since the holder butts up against it