#linuxcnc Logs

Feb 10 2022

02:04 AM Deejay: moin
02:23 AM slick: I'm looking to build a laser engraver. Would a CNC machine in theory be able to do both laser engraving and milling/routing (assuming I change the heads and software between a laser and a mill/router)?
02:24 AM XXCoder: right now this channel tend to be pretty quiet :)
02:24 AM slick: lol, glad you're around at least :)
02:24 AM slick: thanks again
02:25 AM slick: better time of day?
02:25 AM XXCoder: np
02:25 AM XXCoder: few hours?
02:25 AM XXCoder: 2-4
02:25 AM slick: probably be asleep then, but I can try tomorrow (~10 hours or so)
02:26 AM XXCoder: cool :)
02:27 AM slick: btw, when people refer to "CNC", they're usually talking about a milling/routing CNC right?
02:28 AM XXCoder: yeah or lathe
02:28 AM XXCoder: 3d printer and laser is cnc also, though tend not to be called one lol
02:30 AM slick: right lol. I knew what CNC stood for and the concept, but late to the hobbyist game so the terminology was a little tricky
02:33 AM XXCoder: :) im both hobbyist and well techinically former cnc machinist work
02:34 AM slick: oohhh lucky lucky. Hope you took full advantage of the tools when you were in the trade
02:34 AM XXCoder: nah machins was too busy
02:35 AM slick: lol, murphy's law right?
02:35 AM slick: at least you got the experience
02:35 AM XXCoder: yeah
02:36 AM Loetmichel: hehe, i was hired here as the Production manager... what i do is design, CNC milling, CNC printing and soldering the circuits i designed. The first CNC mill here was my privately built one that i took to the company for a "quick job"... took me a good three years to get it back home ;)
02:37 AM slick: that's pretty impressive!
02:37 AM Loetmichel: nah, its just a case of "jack of all trades" getting utilized
02:40 AM slick: XXCoder, have you built a CNC yourself? Loetmichel, you said you did. How small did you get the error/precision down?
02:41 AM Loetmichel: amout 0,05mm
02:41 AM Loetmichel: about
02:41 AM slick: very nice
02:41 AM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=12569&g2_imageViewsIndex=1
02:42 AM slick: was it a lot of fine tuning?
02:42 AM Loetmichel: just a small one though
02:42 AM Loetmichel: nah, but its not meant fir heavy work
02:43 AM slick: good enough for personal projects though
02:54 AM XXCoder: I varied a lot on machines
02:54 AM XXCoder: from timy robodrill to huge a61
02:57 AM slick: jesus! huge is right, just looked up that a61, wow
03:09 AM XXCoder: yeah
03:10 AM XXCoder: robodrill can fit in my closet lol
03:10 AM XXCoder: if its gutted, you can just fit inside, standing
05:08 AM Centurion_Dan1 is now known as Centurion_Dan
05:08 AM sinned69152 is now known as sinned6915
03:37 PM Tom_L: http://tom-itx.no-ip.biz:81/~tom-itx/irc/logs/%23linuxcnc-devel/index.html
03:37 PM Tom_L: that
03:39 PM Tom_L: the 'also available' link is good it's the 'logged' one that should be the same as that
03:39 PM Tom_L: or removed
03:39 PM Tom_L: last line of the page
03:44 PM Tom_L: JT-Shop, sled looks nice
03:55 PM JT-Shop: thanks, might finish it up today
05:26 PM JT-Shop: Tom_L, https://gnipsel.com/images/wood-working/wedge-sled/wedge-sled-02.jpg
05:26 PM JT-Shop: https://gnipsel.com/images/wood-working/wedge-sled/wedge-sled-03.jpg
05:28 PM JT-Shop: just need to find some better pivot carriage bolts and figure out the stop
05:28 PM XXCoder: nice. how do you align them though if want both to be same angle (but mirrored)
05:29 PM flyback: https://www.businesswire.com/news/home/20220209006166/en/Western-Digital-Comments-on-Production-Status-of-its-Joint-Venture-Flash-Memory-Manufacturing-Facilities
05:29 PM XXCoder: du the bolt holes
05:29 PM XXCoder: nm my question lol
05:30 PM XXCoder: you probably can add bunch more angles if it had more rows of holes
05:40 PM JT-Shop: the bolt goes through a location hole
05:44 PM XXCoder: yeah thats what I figured lol
05:48 PM JT-Shop: https://gnipsel.com/images/wood-working/wedge-sled/wedge-sled-04.jpg
05:49 PM XXCoder: nice
05:49 PM XXCoder: seem to work evry well
05:49 PM JT-Shop: the angles are fixed by the number of segments I just cut the 8 segment for a test with some crap wood
05:49 PM JT-Shop: I'm stoked that it worked lol
05:51 PM JT-Shop: I need to engrave each hole with the number of segments
05:51 PM XXCoder: you made it with cnc? if so, why not engrave while it was there?
05:52 PM JT-Shop: I can put it back later... need the mill for work so I had to finish up the critical stuff on the base
05:52 PM XXCoder: true, not that besides approxately where hole is, location isnt that critical
05:53 PM _unreal_: hello
05:54 PM JT-Shop: it will cut 8, 10, 12, 16, 24 and 36 segments
05:54 PM JT-Shop: the videos show 144 segments but that seems crazy lol
05:54 PM _unreal_: segments of what?
05:55 PM JT-Shop: I need to make a spreadsheet to calculate the lengths of segments to get the desired diameter
05:55 PM JT-Shop: wood
05:55 PM _unreal_: thats a lot of segments what is being constructed?
05:56 PM XXCoder: 144 sounds like you'd need huge lathe if you wanted to smooth circle it
05:56 PM JT-Shop: anything you want
05:56 PM JT-Shop: or they are very small segments
05:56 PM XXCoder: yeah though small it'd increase errors
05:56 PM unterhaus: I bought something at salvage which refreshingly said what was in it on the manufacturers web page
05:56 PM XXCoder: +- .01 * 144
05:57 PM unterhaus: essentially, "we bought a power supply from Power One and put it in a nice box"
05:57 PM JT-Shop: glue up is the tricky part it seems
05:57 PM unterhaus: with 144 segments especially
05:58 PM JT-Shop: I used a rubber band on the 8 segment test pieces
05:59 PM JT-Shop: hmm the calculations for inner and outer diameter of a finished part seems a bit daunting at this point
05:59 PM unterhaus: solidworks
06:00 PM JT-Shop: to the rescue
06:04 PM unterhaus: seems like it would be a great use of a parametric dimension
06:04 PM XXCoder: yup. can be done in openscad
06:04 PM XXCoder: you program in and design a simple gui
06:04 PM XXCoder: done
06:05 PM XXCoder: i see no reason to use 3d
06:07 PM JT-Shop: driving dimensions are segment length and width and driven are inner diameter and outer diameter
06:14 PM JT-Shop: time for some rabbit food...
06:15 PM Tom_L: inscribed octagon or whatever or circumscribed..
06:15 PM Tom_L: since the circle will be to the flats only
06:17 PM JT-Shop: yep
06:17 PM Tom_L: tangent
06:21 PM Tom_L: https://www.varsitytutors.com/hotmath/hotmath_help/topics/congruent-tangents-and-circumscribed-polygons
06:21 PM Tom_L: close
07:03 PM perry_j1987: hows it goin
07:20 PM Tom_itx: JT-Shop, http://catia-tnt.blogspot.com/2017/10/polygon-udf.html
07:20 PM Tom_itx: nice exercise for ya :)
07:21 PM Tom_itx: i haven't tried creating a user defined function but i might give it a whirl
07:33 PM roycroft: i just found that jeremy schmidt did his own take on a dust shoe for his cnc router
07:33 PM roycroft: his is also not attached to the spindle, but sits at a fixed, but adjustable, height
07:33 PM roycroft: he doesn't use a brush though - he uses a flat bottom that sits about 0.020" off the workpiece
07:34 PM roycroft: https://www.youtube.com/watch?v=oFIy5Jyz23E
07:36 PM XXCoder: interesting
07:38 PM roycroft: it reinforces my decision to not design the dust shoe as part of the initial build, so i can consider and perhaps try options later on
07:39 PM roycroft: i was always concerned about the bristles getting dirty and possibly even scratching materials like acrylic
07:39 PM roycroft: a no-contact dust shoe would eliminate any possibility of that
08:00 PM CloudEvil: segmented brushes optically raised.
08:02 PM roycroft: this, for me, will be a tool, not a toy
08:02 PM roycroft: i'll want to keep things as simple as possible both for reliability and cost savings
08:06 PM XXCoder: and repairability
11:35 PM Tom_L: this will be cool once i get it working
11:38 PM Tom_L: input circle radius, number of sides and it calculates a circumscribed or inscribed polygon
11:39 PM XXCoder: nice. openscad?
11:39 PM Tom_L: nope
11:39 PM Tom_L: catia
11:39 PM XXCoder: I want that file if youre sharing kik
11:39 PM XXCoder: lol ok
11:39 PM Tom_L: creating a user defined function for it
11:55 PM XXCoder: cool :)