#linuxcnc Logs

Mar 08 2021

#linuxcnc Calendar

01:02 AM Deejay: moin
01:26 AM XXCoder: skunkworks: finally captioned. yeah you'd need to export higher resolution stl
01:27 AM XXCoder: i dont know if true arc 3d format will ever be supported.
05:53 AM Tom_L: morning
06:12 AM JT-Cave: morning
09:13 AM unterhaus_: my bandsaw fence showed up a day early. I'm askeered to go look at it
10:22 AM unterhaus_: It would have been nice if there were a few words of instruction with that fence, I'm going to feel guilty looking at grizzly's site for them.
10:22 AM unterhaus_: Okay, no I'm not
11:11 AM unterhaus_: Grizzly just has the same parts breakdown and everyone that purchased this fence and made a video about it is an idiot
11:13 AM roycroft: the fence is fine
11:13 AM roycroft: many people who bought it not so fine
11:23 AM unterhaus_: roycroft, did you ever find any instructions for it?
11:27 AM unterhaus_: I take it the back of the fence just rides on that rail?
11:28 AM roycroft: there are no instructions for it
11:28 AM roycroft: there's a plastic button that screws into the fence that rides on the back rail
11:29 AM roycroft: that was the main mod i had to make - the fence itself is cast iron, and not solid (because it would weigh even more if it were solid)
11:29 AM roycroft: and the inside is just cast, as one would expect
11:30 AM roycroft: i had to machine an area on the inside and install a steel plate so i could move that plastic button back a bit
11:30 AM roycroft: otherwise i'd have had to make the rear rail standoffs a lot longer
11:32 AM roycroft: from an email from grizzly when i was first considering that fence a couple years ago:
11:32 AM roycroft: " We do not have a complete manual for the H7587 Resaw Fence, as it is a fairly simple item. Information on the fence and installation can be found in the manual for the G0457 Bandsaw. We have linked the manual below for your convenience. Resaw fence installation instructions begin on page 18.
11:32 AM roycroft:
11:32 AM roycroft: http://cdn2.grizzly.com/manuals/g0457_m.pdf"
11:34 AM Loetmichel: sensille: you also have to losen the 2*8 screws that hold the sleds on the SBRs
11:37 AM sensille: i was afraid of that :-/ drill more holes into the bed?
11:37 AM sensille: can't really access them from beneath
11:41 AM unterhaus_: roycroft, thanks.
11:44 AM unterhaus_: no real words of wisdom in that manual either
11:45 AM roycroft: there's not much to it, really
11:45 AM roycroft: when you get it, attach the fence to the front rail
11:45 AM roycroft: set it on the table
11:45 AM roycroft: you can then mark the location of the front screw holes on the table
11:45 AM roycroft: drill and tap them
11:46 AM roycroft: mount the rear rail the same depth below the table as the front rail
11:46 AM roycroft: and that's about it for most installations
11:46 AM roycroft: the plastic button that rides on the rear rail is height adjustable, so you don't have to get it spot on
11:47 AM roycroft: i had to modify my fence, as i said
11:47 AM roycroft: and the rails were too long - i ended up cutting 7" off the left side of them so they would not stick out too far
11:48 AM roycroft: that actually was a good thing, as i think i can use the cutoff piece of the front rail to make a hanger for the fence for when i'm not using it
11:49 AM roycroft: i just haven't figured out where to locate it yet
11:49 AM roycroft: if i'm honest, i haven't thought about it yet
12:07 PM veegee: Neighbour wants me to plasma cut a hole in the forks of his forklift lol
12:08 PM veegee: I strongly advised against it because of the heat
12:08 PM veegee: But it's a small front loader type machine rated for 900 lbs load
12:08 PM veegee: so I guess a hole near the tip of the fork isn't the wort thing
12:36 PM unterhaus: roycroft, thanks, I guess I was mostly worried if there was anything sensitive about install
12:37 PM unterhaus: but there isn't, so I'm going to go tap some holes.
12:52 PM JT-Shop: damn no one sells regular shop lights anymore here
12:52 PM sensille: as in non-LED?
12:59 PM JT-Shop: yea, I have led bulbs
12:59 PM JT-Shop: and you can't convert the ones without a ballast
01:00 PM Tom_L: 8' ?
01:01 PM Tom_L: i had a box of 4' that are gone now and i'm not replacing them as they fail
01:01 PM Tom_L: not flourescent anyway
01:05 PM XXCoder: JT isnt there led tubes that can work with those?
01:06 PM Tom_L: you need the ballast type i think
01:08 PM XXCoder: maybe https://youtu.be/ts4dW8kLefY hes talking about no ballast
01:10 PM XXCoder: yeah can google "Ballast bypass" led tubes
01:11 PM XXCoder: they are designed to work directly with no ballast at all. like your lights JT-Shop
01:48 PM unterhaus: home depot has bulbs that don't need a ballast
01:48 PM unterhaus: I just converted all my shop lights
01:48 PM unterhaus: and one of the drop ceiling lights
01:48 PM unterhaus: ballasts are getting expensive
01:51 PM XXCoder: nice
01:52 PM XXCoder: wonder why tho
01:52 PM Tom_L: copper
01:52 PM Tom_L: and probably because they want to phase them out
01:56 PM sinned6915: XXCoder: I have ~10 HO flouscrent fixtures in my shop so they lilght up in the cold. The ballasts are $75 each now.
01:56 PM sinned6915: they are at their end of life
01:57 PM sinned6915: bulbs are $6/each
01:58 PM sinned6915: for the price of 2 ballasts, I can convert everything
01:58 PM XXCoder: makes sense
01:59 PM sinned6915: its nuts. supply and demand.
01:59 PM sinned6915: and the 60Hz hummmmmm is gone too
01:59 PM unterhaus: nobody but silly people needs a ballast
01:59 PM unterhaus: that always runs the price up
02:00 PM unterhaus: it's like lead screw nuts are cheap, but the mounting plate is expensive
02:00 PM unterhaus: they figure if you can't make it yourself, $$$$
02:09 PM gloops: might be weed growers pushing price of sodium lights up, standard kit seems to use the 600w ballast
02:43 PM enleth: that cleaned up nicely: https://i.imgur.com/s2vs8pm.jpg
02:44 PM XXCoder: wow
02:44 PM XXCoder: cast iron?
02:44 PM enleth: no, steel
02:45 PM enleth: I'm pretty sure it's a training projectile for a T-62 tank, found on an old firing range
02:45 PM enleth: for me, it's a chunk of mild steel
02:45 PM XXCoder: you found it and cut it?
02:46 PM enleth: a guy selling a bunch of those out of his garage did
02:46 PM XXCoder: thats quite a thick chunk of steel indeed
02:46 PM XXCoder: whats you making
02:46 PM enleth: I'm cleaning up the pointy side to chuck it properly, so I can make parts out of the wider end
02:47 PM XXCoder: nice
02:47 PM enleth: right now, a new bearing housing for the bridgeport
02:47 PM XXCoder: rebuilding one?
02:48 PM enleth: yep, replacing crapped out spindle drivetrain
02:49 PM enleth: someone here said last week that I'm about to waste a bunch of inserts cleaning up this rusty chunk, but in fact, I'm on the same cutting edge of a no-name chinese CNMG and it's still fine so far
02:49 PM XXCoder: you can always grind some very hard metal and cut off rusty stuff
02:50 PM JT-Cave: my led tubes take 100-277v I just toss the ballast however I still have a bunch of fluorescent tubes that require a working fixture
02:50 PM XXCoder: make design where resharp takes literally seconds
02:50 PM enleth: 100mm final diameter, 160rpm, 1mm DOC, 0.25mm/rev feed
02:50 PM XXCoder: jt you might be able to resell ballasts lol
02:50 PM enleth: no visible wear on the insert
02:51 PM enleth: despite the cut being interrupted on the surface, the part didn't want to center very well
02:53 PM enleth: anyway, I'm flipping it around now that there's a proper surface to chuck it on, so it doesn't jump out on me when I crank feeds and speeds up a bit
02:54 PM XXCoder: indeed
02:55 PM XXCoder: have fun :D
02:55 PM XXCoder: isnt bottom harder metal?
02:55 PM XXCoder: well you'll find out soon enough
02:55 PM enleth: file bites the botyom as well
02:55 PM XXCoder: curious if you cut off nose or just turn all of it into chips
02:56 PM enleth: cut it off
02:56 PM XXCoder: nice
02:56 PM enleth: besides, if it were hard, that's what I have CBN inserts for
02:57 PM XXCoder: i like that because sometimes cutoffs can be useful
02:58 PM XXCoder: i get sad when person turn 4" diameter into .5" diameter max part
02:58 PM enleth: I've got a lot of bar stock that originally came out of a printing press, as rollers - it's all surface hardened
02:58 PM enleth: so I'm used to hard turning the outside
02:58 PM XXCoder: makes sense
02:59 PM unterhaus: roycroft, I'm going to have to do something to move the rear rail button forward
03:00 PM unterhaus: it's at least 5" off the back of my table
03:00 PM enleth: but this thing is probably not even heat treatable, I assume it's the chrapest mild steel they could get
03:01 PM enleth: its only job was to get lobbed a mile across the firing range so a bunch of dumbasses would learn to operate a tank
03:03 PM XXCoder: enl yeah and its not expected to live much past firing
03:33 PM roycroft: it took me about an hour to do it, unterhaus
03:33 PM roycroft: i'll snap some pics of the mod i did
03:36 PM roycroft: i guess i'll take some pics when my ipad has enough of a charge
03:36 PM roycroft: for some reason it did not hibernate last night, and now the battery is dead
03:39 PM roycroft: i've had no bites on my edge sander yet, but that's to be expected
03:39 PM roycroft: it's not the most sought after machine
03:39 PM roycroft: it may be a while before the right person sees the ad
03:40 PM roycroft: i'm really enjoying the extra space in my garage shop, though, so i may move it out the fabrication shop, which is pretty full, but i've staged machines there before and have always found a way to work around them
03:42 PM roycroft: posting the ad on a sunday evening was probably not the best idea anyway
05:24 PM XXCoder: crazy robertz video. making then measuring gage ball. uses .000005" division measuring tool
05:29 PM XXCoder: then he goes into math to calculate tiny error by ball deformation by weight on it for better precision
05:29 PM XXCoder: god tier
05:32 PM Tom_L: using one to measure your prints?
05:32 PM XXCoder: LOL
05:34 PM gloops: 0.0127 Millimeters
05:34 PM gloops: a bit less than a cig paper thickness
05:34 PM XXCoder: hmm think you miscounted zeros
05:35 PM Tom_L: closer to the hair on a gnat's ass
05:35 PM XXCoder: 1.27×10^-4 mm
05:35 PM gloops: https://www.calculateme.com/length/inches/to-millimeters/0.0005
05:35 PM XXCoder: thats .00127mm
05:36 PM XXCoder: thats FIVE zeros, not 3
05:36 PM gloops: oh yeah, well spotted, i just clicked the calculator
05:36 PM XXCoder: :)
05:36 PM gloops: i could have messed up bigtime following that!
05:37 PM Tom_L: chances are, if you hold it it will change
05:38 PM XXCoder: tom he shows that very slight weight change on sensor holder have an effect
05:38 PM XXCoder: larger than .000005"
05:38 PM XXCoder: in fact, it waves very slightly by his body heat as he puts on tiny weight and off
06:06 PM * JT-Cave milled up a half a bucket of stickers... need another bucket and a half before felling the twin white oak
09:07 PM enleth: that went rather well: https://youtu.be/_t5fo2400gQ
09:09 PM XXCoder: not bad
09:09 PM XXCoder: can get it closer ot just close enough?
09:10 PM enleth: plenty close enough, I only did that because it was simpler than swapping in the 3-jaw chuck
09:10 PM Tom_L: is the 3 jaw that close though?
09:10 PM enleth: the part in the jaws is going to be a cutoff anyway
09:11 PM XXCoder: cool :)
09:12 PM enleth: Tom_L: generally, yes - aftee last week's reconditioning of the bellmouthed jaws, it's pretty darn accurate
09:12 PM enleth: *after
09:15 PM Tom_L: nice
09:17 PM XXCoder: :)
09:35 PM roycroft: are you about, unterhaus?
10:02 PM -!- #linuxcnc mode set to +v by ChanServ
10:11 PM andypugh_ is now known as andypugh
10:18 PM captain_morgan0 is now known as captain_morgan
10:26 PM enleth_ is now known as enleth
10:35 PM unterhaus: roycroft just got back
10:36 PM roycroft: roycroft.us/BandsawFence
10:36 PM roycroft: that's how i modded my fence
10:36 PM roycroft: i don't recall the exact measurements, but the opening in the casting was well under 1"
10:37 PM roycroft: so i took a pice of 1/2" x 1" flat bar, squared up the sides, and that measured at about 0.980" or so
10:37 PM roycroft: i then milled the inside of the fence to match that, and drilled and tapped some holes
10:38 PM unterhaus: so you found some hammered finish paint?
10:38 PM roycroft: drilled and tapped for the plastic button, which iirc is an m6 screw
10:38 PM roycroft: tjat
10:38 PM roycroft: it's not hammered
10:38 PM roycroft: it's fake power coat
10:38 PM roycroft: it's fake power coat
10:38 PM XXCoder: powder?
10:38 PM roycroft: i've used it a lot in the past
10:38 PM roycroft: it's not actual powder coat
10:39 PM roycroft: but it leaves a finish like powder coat
10:39 PM unterhaus: never heard of fake powder
10:39 PM roycroft: which is why i call it "fake powder coat"
10:39 PM roycroft: i think the can says "textured finish"
10:39 PM roycroft: anyway, that took me an hour or so to do
10:40 PM unterhaus: I might have some of that but I think it says hammered
10:40 PM roycroft: you could probably just epoxy a piece of steel in there - it would last forever
10:40 PM unterhaus: mine isn't going to be that nice
10:41 PM unterhaus: I was looking for a piece that would fit so I wouldn't need to mill
10:41 PM roycroft: the casting is kind of rough
10:42 PM roycroft: i think that even if i were not going to screw it in i'd probably mill it like that and then epoxy it
10:43 PM unterhaus: I'm going to screw it in, at least from one side
10:44 PM unterhaus: problem is I can't mill
10:49 PM roycroft: that makes it a bit more difficult to do it neatly
10:50 PM roycroft: but epoxy works fine, i promise
10:53 PM unterhaus: Thanks for the pictures
10:54 PM roycroft: no problem