#linuxcnc Logs
Apr 28 2021
#linuxcnc Calendar
12:06 AM Bleep-CNC: Yeah, I'm gonna rip it out and try a different one. I just turned off the inversion of the step signals in a test copy of my configuration and the gantry is toatlly apeshit. Sometimes moves are OK other times the ends of the gantry are fighting -Y gave me -X & -Z, then it gave me -Y on the next try, then nothing then -Y1 & +Y2. there's something fucked with it for sure. .
12:32 AM gigasu_shida is now known as gigas_cedar
01:07 AM Deejay: moin
02:00 AM Bleep-CNC: Woohoo! That was it... That PC-2-ROUTE breakout board that was the only bit of original electronics left was the problem.
02:02 AM Bleep-CNC: I just sat here looping 'G0 X10 Y10' ' G0 X20 Y20' for a while without a stutter or apparent missed step.
02:02 AM XXCoder: nice
02:03 AM XXCoder: how old is router? if its like 30 years old, then its possible that caps is bbad
02:03 AM Bleep-CNC: And of course it's 00:50 and it's too freakin late to fire up the router and shopvac.
02:03 AM XXCoder: :)
02:05 AM Bleep-CNC: Yeah, I've got a recent DB25-1205 on it now and I'm going to try turning the velocity and accel back up now but it's pretty freakin fast on a G0 move as it is.
02:06 AM XXCoder: moce
02:06 AM XXCoder: *nice
02:07 AM * Bleep-CNC giggles
02:08 AM Bleep-CNC: A reminder it wasn't all for the kids... Brain: Are You Pondering what I'm Pondering Pinky? Pinky: I Think so Brain, But if the Plural for mouse is mice why isn't the plural for spouse, spice?
02:12 AM Bleep-CNC: Or maybe I wont bother playing with the vel/accel again because it's showing a max velocity of 258 on a rapid. roughly 3 in/sec.
02:12 AM XXCoder: remember to always walk in
02:17 AM Bleep-CNC: I cranked the jog speed up to 400 in/min to hit the 258 and I did it in the 12"-36" center region of a 48" table. Ive got Sharpie marks on all 3 axises at ~0.5 from home I coast down to.
02:18 AM Bleep-CNC: Well. it's too late to make noise and too early to go get breakfast so I'm going to go fall ovber for a while.
04:10 AM Tom_L: morning
04:11 AM XXCoder: yo
05:43 AM JT-Cave: morning
05:44 AM XXCoder: yo
06:30 AM jymmmm: Morning
08:43 AM jymmmm: G'morning, part two
09:28 AM JT-Shop: yo jymmmm
09:29 AM jymmmm: Hey JT-Shop
10:13 AM * Bleepshop|2 offers thanks...
10:13 AM Bleepshop|2: There is only one Finagle, and Murphy is his prophet.
10:19 AM Bleepshop|2: That freaking expesive ass breakout was the issue. Swapped from the PC-2-ROUTE board over to a cheap DB25-1205 and it seems to have cured all the apeshit gantry issues.
11:15 AM Eric__: what freaking expensive ass breakout board was it?
11:22 AM Bleepshop|2: It was the Sound Logic PC-2-Route board that was the onlt bit of original electronics left on this thing.
11:40 AM Bleepshop|2: Hot Damn! 3 lines of text at a 45 degree angle inside a bounding box and the first pass on hte box and the return pass after cutting the text are right on the line. 8D
12:10 PM roycroft: happy ed balls day
12:23 PM roycroft: if i were to buy some toolholders for carbide inserts and the inserts for my 12x36 lathe, with a mix of turning steel, aluminium, and brass primarily, does anyone have a recommendation for what to get?
12:24 PM roycroft: there are just so many types of inserts out there it's hard to make sense of the selection
12:24 PM roycroft: i'm thinking the toolholders should be 3/8" or, at most, 1/2" for a lathe that size
12:39 PM Tom_L: i'd talk to an insert vendor
12:39 PM Tom_L: you likely will want a variety
12:39 PM roycroft: yes
12:40 PM Tom_L: diamond probably for a lathe
12:40 PM roycroft: and when i see folks discuss inserts for lathes online, they usually have abom-size machines
12:40 PM Tom_L: they still cut the same metal
12:40 PM roycroft: they do
12:41 PM roycroft: but there's no way i can fit a 3/4" insert holder on my lathe
12:41 PM Tom_L: so the carbide composition will be the same, the insert size may differ
12:41 PM roycroft: yes, if the giant inserts are made in smaller sizes
12:41 PM roycroft: sometimes they are, and sometimes they are not
12:42 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/SANDVIK_TURN_H.pdf
12:42 PM roycroft: but even ignoring that, i need to take much smaller cuts than the giant lathes do
12:42 PM roycroft: and some of those inserts are pretty unhappy with small cuts
12:43 PM roycroft: i'm again just asking if folks with smaller machines like mine use inserts, and what they find works well for them
12:43 PM Tom_L: i just use hss blanks on mine
12:43 PM Tom_L: i have a few carbide boring bars but that's about it
12:43 PM roycroft: that's almost all i've ever used, other than some cheap chinese brazed-on carbide tooling
12:44 PM roycroft: and i'm not sure i should move to inserts
12:44 PM roycroft: i'm not a production shop
12:44 PM roycroft: meaning: 1. i'm not under time contraints when turning parts, and 2. i don't have a huge budget for tooling
12:45 PM roycroft: but if i could get a couple or three toolholders and a few inserts that might be reasonable
12:45 PM roycroft: i don't want to start buying a lot of different brands/styles to try them out though
12:50 PM Tom_L: my holders are right, left and center
12:50 PM roycroft: do you have any threading holders?
12:51 PM Tom_L: not for the lathe
01:03 PM gregcnc: so many inserts these days. you really need to study the catalogs
01:05 PM roycroft: yeah, and my eyes glaze over when i do that
01:06 PM roycroft: because there are so many inserts these days
01:06 PM roycroft: i'll probably end up not bothering with them again for a while
01:06 PM roycroft: until i get really bored and have absolutely nothing better to do for a few days than read catalogs
01:07 PM roycroft: i don't see that level of boredom happening any time in the forseeable future
01:07 PM gregcnc: some are very specific in application others will cover many materials
01:07 PM gregcnc: you probably can't make use of roughing grades or negative geometry
01:08 PM gregcnc: so look at medium to finishing grades for steel and non-ferrous inserts for the rest
01:12 PM Tom_L: that's why i suggested talking to a insert rep
01:25 PM roycroft: yeah, that would make sense
01:26 PM roycroft: i guess i'm reluctant because it would kind of be a waste of their time
01:26 PM roycroft: i'm not likely to buy inserts in any kind of volume
01:51 PM CaptHindsight: https://www.solomotorcontrollers.com/ for motors 8-58V – 32A – 800W, DC, BLDC, PMSM and ACIM
01:54 PM Bleepshop|2: roycroft: Get generic holders and good carbide inserts. Only way to turn. ;D
01:55 PM Bleepshop|2: Or mill your own holders and buy inserts. Hell the local NAPA store sells the triangular carbibe inserts now. LOL
01:56 PM aaroncnc: CaptHindsight interesting product but that website is something else. images and text moves and turns as i scroll down the page........
01:57 PM * Bleepshop|2 looks at the first thing out of the router since swapping the BOB and laughs maniacally.
02:05 PM Bleepshop|2: Looks like all my misse step issues were a bad BOB. I tried it with the step signals inverted and not inverted after the swapout and the gantry behaves the same either way unlike before where with teh non-inverted step signals teh gantry would go apeshit on a move.
02:08 PM CaptHindsight: aaroncnc: I think the idea there is to disorient you and become overwhelmed by their product
02:09 PM CaptHindsight: it is a motor controller so motion
03:08 PM -!- #linuxcnc mode set to +v by ChanServ
03:08 PM -!- #linuxcnc mode set to +v by ChanServ
03:56 PM -!- #linuxcnc mode set to +v by ChanServ
03:56 PM -!- #linuxcnc mode set to +v by ChanServ
04:05 PM JT-Shop: we got 1 1/2" of rain this afternoon... I hope my K31 didn't get washed away
04:05 PM Tom_L: yippee
04:06 PM Tom_L: we got just enough to not use your windshield wipers
04:08 PM roycroft: it's sunny and warm here today
04:08 PM roycroft: but the rain will return tomorrow night
04:10 PM Tom_L: wtf, updated phones the other day and now you get no headphones or charger. you do get a charge cord but it's usb c to usb c
04:14 PM pcw_home: you need to upgrade all you devices
04:14 PM Tom_L: there were a couple on the fritz and she needed another line
04:50 PM veegee: https://www.valvers.com/img/engineering/jic-dimensions.jpg
04:50 PM veegee: Ugh, you really have to go a size up for JIC
04:50 PM veegee: 1/2" hose should use 5/8" JIC fittings or suffer the flow restriction of 1/2" JIC
04:56 PM veegee: Inside dimension of 1/2" NPT nipple is > 0.5"
06:01 PM roycroft: grr
06:01 PM roycroft: i'm ready to mount my 4 jaw chuck on the adapter platei made, but the bolts are 3mm too long
06:01 PM roycroft: and i don't want to grind them down if i can help it, because i need them for the final back plate
06:02 PM roycroft: so now to see if i can find some long metric bolts in this town
06:03 PM Tom_L: washers
06:46 PM roycroft: socket head screws that have to sit flush or recessed
06:46 PM roycroft: they go in through the face of the chuck
06:47 PM roycroft: and the store with the best selection of metric fasteners only has shcs up to m8, while i need m10
06:47 PM roycroft: so i guess i grind these down for now, and order some better ones from mcmaster for the final install
06:48 PM JT-Cave: yeah m10 is not common in stores
06:49 PM Tom_L: funny, i've got a drawer full of 10mm head bolts that have just been sitting there
06:49 PM Tom_L: probably too long for that app though
06:51 PM roycroft: and really oddly, what m10 fasteners the stores have are mostly m10-1.0 and m10-1.25
06:51 PM roycroft: these are m10-1.5, which is the standard coarse thread size
06:51 PM roycroft: m10-1.0 is extra fine, which is usually uncommon
06:51 PM Tom_L: yeah i doubt the head bolts would be coarse thread
06:51 PM JT-Cave: that is odd to have fine and extra fine but not std
06:52 PM roycroft: head bolts are usually fine thread
06:52 PM roycroft: but if that's what i had i'd tap for fine thread
06:52 PM roycroft: i can tap to any thread pitch
06:52 PM Tom_L: you may try an auto store just in case
06:52 PM roycroft: it's the diameter that is important
06:52 PM roycroft: i'm done running around
06:52 PM roycroft: i could have ground the others down in much less time than i spent hunting these down
06:53 PM roycroft: and this chuck is imported from across the big, wide ocean
06:53 PM roycroft: the chuck is decent quality
06:53 PM roycroft: but the bolts are what one would expect from over there
06:53 PM roycroft: i'd probably have ordered new ones anyway
06:54 PM * roycroft has already replaced most of the fasteners on his new jointer, which he's had for a month, with decent quality ones
06:54 PM Tom_L: either of you ever shop at mikestools.com?
06:55 PM roycroft: i know of them, but i've never purchased from them
07:01 PM JT-Cave: never been there before
07:06 PM Bleepshop|2: roycroft: Try an auto parts store before you start grinding. They stock replacements for Grade-8/Grade-10 metric SHCS.
07:07 PM JT-Cave: 2 days left to burn 4.3 GB of internet data lol
07:07 PM XXCoder: yay time to download huge iso of os lol
07:07 PM * Bleepshop|2 realizes the cat has been on the ouse again and stopped the window scrolling.
07:32 PM Tom_L: JT-Cave, you must have found your leak ehh?
07:34 PM JT-Cave: yea the phone I'm sure... now to figure out how to make the s10 as up to date as the s4 was for call blocking with wildcards
07:47 PM roycroft: so i'd like a sanity check
07:47 PM roycroft: the chuck is mounted
07:47 PM roycroft: the adapter plate is too thin for me to have turned a register shoulder on the face of the adapter to center the chuck
07:47 PM roycroft: i centered it as best i could, and then bolted it down firmly
07:48 PM roycroft: it's spot on - concentric to within 0.001" along one axis, but it's about 0.015" out on the other
07:48 PM roycroft: being a 4 jaw, i can adjust the parts for that
07:48 PM roycroft: but the face of the chuck wobbles about 0.003"
07:48 PM roycroft: i'm a little more concerned about that
07:49 PM roycroft: for my one time use, is that likely going to matter?
07:49 PM roycroft: and as well, is my lack of being able to turn a register shoulder going to bite me when i start turning the big cast iron blank?
07:50 PM roycroft: i tightened the mounting bolts very firmly, but tool pressure can be rather significant
07:51 PM roycroft: i'm defining "axis" in this context as a line drawn through an opposing pair of jaws
07:51 PM roycroft: so the two axes are perpendicular to each other
07:55 PM Tom_L: wobble isn't a word you typically want to hear in a lathe discussion
07:57 PM Tom_L: since you can't put a shoulder on it, can you pin it?
07:57 PM * JT-Cave needs some kind of pre-filter for silt that can be back washed
07:57 PM roycroft: hmm, i could possibly do that
07:58 PM roycroft: and by "wobble" i mean an indicator on the face of the chuck moves in and out by 0.003" along the z axis
07:58 PM Tom_L: the chuck or the part attached to the chuck?
07:58 PM roycroft: oh, this might be fun
07:58 PM roycroft: the chuck
07:58 PM Tom_L: not much you can do about that ehh?
07:59 PM JT-Cave: can you face off the adapter in situ
07:59 PM roycroft: i just heard a big "thud", as the ups driver literally dropped the box off containing my cast iron disc
07:59 PM roycroft: i already did, jt-cave
07:59 PM roycroft: so i don't understand why i have that
07:59 PM roycroft: but the one part i'm going to make with this setup will be turned in one go
07:59 PM JT-Cave: so the chuck itself is not parallel front to back?
07:59 PM roycroft: no removing/reinstalling it
07:59 PM roycroft: yes
07:59 PM roycroft: wel
07:59 PM Tom_L: JT-Cave, screen for what?
07:59 PM roycroft: well, i don't know
07:59 PM JT-Cave: silt
08:00 PM roycroft: i should probably remove it and measure
08:00 PM roycroft: if it's not then that's another issue, and not a good one
08:00 PM JT-Cave: like a pool filter but for fine silt
08:00 PM roycroft: i need to go see if i have a cast iron disc or a box of cracked cast iron
08:01 PM JT-Cave: yikes
08:01 PM Tom_L: and a crack in your walk?
08:01 PM Tom_L: JT-Cave, some sort of spinner?
08:03 PM Tom_L: https://www.amazon.com/Sediment-Cartridge-Ronaqua-Filtration-Polypropylene/dp/B01M1CNMP9
08:03 PM Tom_L: or something like that
08:05 PM Tom_L: https://www.cleanwaterstore.com/sediment-filters-cws-manual-backwash.html
08:06 PM Tom_L: bit pricey
08:07 PM Bleepshop|2: JT-Cave: Filter for what? I've used the synthetic swamp cooler pads for biofilters in a koi pond setup for years.
08:08 PM JT-Cave: pre-filter for my water filters for drinking water
08:08 PM Bleepshop|2: Cleaned them by having an airstone under them and diverting flow to the waste line and triggering the air feed.
08:08 PM roycroft: it seems to be a cast iron disc, which is good
08:09 PM roycroft: but now there's a whole other problem
08:09 PM XXCoder: cracked?
08:09 PM roycroft: i need the disc to be a bit over 2" thick - about 2.125"
08:09 PM Bleepshop|2: roycroft: My guess was a hernia after putting it on the bench. LOL
08:09 PM roycroft: i ordered a 3" disc, figuring i'd be spending a whole lot of time making cast iron dust while i turned it down
08:10 PM roycroft: what they sent me was 4-1/2" thick
08:10 PM XXCoder: ow
08:10 PM roycroft: it's too big to cut down with my band saw
08:10 PM roycroft: otherwise i'd be delighted - i'd get two for the price of one
08:10 PM JT-Cave: Tom_L, https://gnipsel.com/images/house/water-filters-01.jpg
08:10 PM XXCoder: can hand saw?
08:10 PM roycroft: hmm, actually, i may be able to cut most of it with the saw in horizontal mode, and then freehand cut the rest with it in vertical mode
08:10 PM XXCoder: id build a big to keep cutting down stright and narrow
08:11 PM JT-Cave: that's my current filter system, 20 micron on the left and two parallel 5 micron and ro upper left but I need something before that for sediment
08:11 PM * roycroft does not want to slice an 8" diameter disk by hand
08:11 PM roycroft: not even cast iron
08:11 PM JT-Cave: bolt something to it to hold it still
08:11 PM roycroft: my band saw is 7x12"
08:11 PM XXCoder: can rotate it?
08:11 PM Bleepshop|2: JT-Cave: Centrifugal trap with a drain.
08:11 PM JT-Cave: how big is the disk?
08:11 PM roycroft: and actually, the 7" limitation is not an issue
08:12 PM XXCoder: saw most of it, then rotate finish it
08:12 PM roycroft: because it's not thick enough to go back to the saw arm
08:12 PM roycroft: so yeah, i can cut it in the band saw, after i built a fixture to hold it
08:12 PM roycroft: it also weighs just under 100 lbs
08:12 PM JT-Cave: Bleepshop|2, I've never seen one got a link?
08:13 PM roycroft: which is why the ups driver both literally dropped it off and had a scowl on her face as she left
08:13 PM JT-Cave: looks like the chickens are in for the night time to tuck them in
08:15 PM -!- #linuxcnc mode set to +v by ChanServ
08:15 PM Bleepshop|2: JT-Cave: Industrial version is a 'verticle vortex separator'. Think cyclone separator for a vacuum only for water.
08:16 PM Tom_L: roycroft, i cut that 2.5" brass to size in the lathe with a sawzall :)
08:17 PM Tom_L: probably out of the question in your case
08:17 PM Tom_L: JT-Cave, you must have some muddy well water
08:18 PM JT-Cave: Tom_L, yeah
08:18 PM * JT-Cave calls it a night
08:18 PM Bleepshop|2: JT-Cave: Yo can fake it with a 55 gallon drum if you've got a booster pump topside.
08:19 PM Tom_L: he doesn't appear to have room for a drum in his basement
08:20 PM Bleepshop|2: 6" or 8" PVC then but he'd have to drill and tap holes in caps.
08:22 PM roycroft: i think i can do it in the bandsaw
08:23 PM roycroft: and if i want to get two back plates out of it, i'll need the band saw - i won't have much wiggle room for a crooked cut
08:23 PM Tom_L: just make a straight cut
08:23 PM XXCoder: roy yeah i was thinking that you can just rotate it
08:23 PM XXCoder: then finish cut there
08:28 PM roycroft: yes, that is something i could have done
08:46 PM roycroft: my experience, tom_l, is that a sawzall sometimes does not listen when i tell it who is boss
08:47 PM roycroft: i'd probably be able to make the cut straight enough, but if it wanders a bit it could easily change from 2 parts to 0 parts
09:11 PM Tom_L: the sawzall was all i had that would do that other than a hacksaw and i wasn't about to do that
09:12 PM Tom_L: it came out quite straight by turning it slowly
09:33 PM roycroft: 2-1/2" is lot easier to cut straight than 8-1/4"
09:33 PM Tom_L: yes
09:33 PM Tom_L: i suggest turning it as you cut so it will come out straighter
09:33 PM Tom_L: may not be possible
09:34 PM Tom_L: the end looked bad but it was straight and cleaned up nice
09:35 PM roycroft: in the olden days, cabinetmakers used to cut thin sheets of veneer with a bow saw that had the blade mounted perpendicular to, and in the middle, of the saw frame
09:36 PM roycroft: to track the saw they used a "veneer plane", which was actually a handplane-shaped thing that had a saw blade mounted in the sole
09:36 PM roycroft: they would cut a groove around all four sides of the piece of wood with the veneer plane, and then the saw would track almost automatically in the kerf
09:37 PM roycroft: they could reliably slice veneers <1/8" thick that way
09:37 PM roycroft: i should think that a saw would track similarly when cutting metal that is kerfed like that
09:38 PM Tom_L: possibly
09:38 PM Tom_L: worth a try anyway
09:38 PM roycroft: but i can fit it in my band saw
09:38 PM roycroft: so i'll just do that
09:38 PM Tom_L: my lathe doesn't do cutoff well so that's why i did it the way i did
09:38 PM roycroft: and it will probably track to about 0.010" or so
09:44 PM roycroft: i've done cutoffs on the lathe holding a hacksaw while the lathe spins
09:44 PM roycroft: but for an 8-1/4" diameter disc, i don't think i'd want to try that
09:45 PM roycroft: i also don't have a hacksaw with enough clearance
09:46 PM Tom_L: yeah, you maybe could mark the perimeter that way though so the bandsaw would follow it better
09:46 PM roycroft: yes
09:46 PM roycroft: that might be a good idea
09:47 PM Tom_L: and when bandsawing, i might even consider hand turning it as you cut slightly
09:47 PM Tom_L: you get one shot so do what you think is best :D
09:47 PM roycroft: the saw tracks really well
09:48 PM roycroft: but i've never cut a cylinder this large in it before
09:48 PM roycroft: 3-1/2" or so is the biggest i've done to date
09:48 PM roycroft: and i don't get one shot
09:48 PM roycroft: but i the first go fails, it costs me another $100
09:48 PM Tom_L: we cut ti trailing link forgings on the bandsaw and that went ok
09:48 PM Tom_L: didn't scrap any at least :)
09:49 PM Tom_L: if the first go is a fail at least one half should be useable
09:50 PM roycroft: it depends on how it fails
09:50 PM Tom_L: don't drop it on your toe
09:50 PM roycroft: it's only thick enough that i'll need to cut it right down the middle if i want two parts out of it
09:50 PM roycroft: i'll wear steel-toed boots
09:50 PM Tom_L: so it smashes the steel in good ehh?
09:51 PM roycroft: it would likely end up causing a bruise instead of a fracture
09:51 PM roycroft: the best plan is to not drop it
09:51 PM roycroft: and that's the plan i'll use
09:52 PM Tom_L: scoring the perimeter i think will help
09:52 PM roycroft: yes, that's easy to do, and will probably help
09:52 PM roycroft: and there's no downside to doing it
11:17 PM Bleepshop|2: roycroft: Make sure you put something under that cast iron slab to catch it. You don't want it hitting the floor and breaking. The disk or the floor. LOL
11:25 PM roycroft: i need to make a wooden cradle for the chuck anyway - i was planning on using that to handle the disc