#linuxcnc Logs

Jun 06 2019

01:40 AM CaptHindsight: so after a week of tweaking preempt_rt is about as fast as RTAI on Ryzen
01:44 AM CaptHindsight: 30K servo thread, 20K base
01:44 AM CaptHindsight: down from the 200-200K range
01:47 AM CaptHindsight: 200K - 300K
03:12 AM selroc: hello
03:38 AM veek_ is now known as veek
05:01 AM jthornton: morning
05:02 AM XXCoder: hey
06:37 AM Tom_L: morning
06:37 AM XXCoder: yo
06:51 AM jthornton: morning
06:52 AM * jthornton is building Lubuntu 19.04 rt preempt
06:52 AM XXCoder: nice
06:52 AM XXCoder: recenjtly upgraded to xfce mint 19
06:53 AM jthornton: xfqt is quite a refreshing change from bloated gnome and other desktops
06:54 AM XXCoder: cant find xfqt?
06:55 AM XXCoder: ah variant of xfce
06:56 AM jthornton: qt5 based desktop
06:57 AM XXCoder: nice
06:58 AM XXCoder: some desktops really is clunky
07:00 AM jthornton: the text editor has show white space which I really need
07:00 AM XXCoder: that can be amazing yeah
07:00 AM XXCoder: geany?
07:01 AM jthornton: geany does but the default is featherpad in lxqt
07:02 AM XXCoder: cool
07:02 AM XXCoder: i like geany. no more gedit
07:02 AM jthornton: yea I gave up on gedit it sucks now
07:07 AM XXCoder: wonder why gedit went bad
07:08 AM jthornton: developer trying to make it like a tablet I guess
07:09 AM jthornton: just like the file manager developer screwed up and put the recent instead of the directory your currently in and his comment was screw you that
07:09 AM jthornton: s how I work
07:11 AM XXCoder: geez
07:47 AM methods_: https://qz.com/1636413/an-open-source-ai-bionic-leg-is-the-future-of-prosthetics/
08:04 AM jthornton: wow powered by a raspberry pi
08:07 AM methods_: yeah
08:36 AM Loetmichel: jthornton: they didnt specicfy HOW intelligent it is ;)
09:00 AM skunkworks: https://www.youtube.com/watch?v=fTI_Ypv4FQE&
09:25 AM Deejay: hi
09:26 AM jthornton: hi
09:41 AM * perry_j1987 waiting for ups with more metal to turn into scrap
10:01 AM * jthornton thinks the Lubuntu 19.04 desktop hummingbird is starting to grow on him
10:05 AM jthornton: hmm 5.0.19-rt11 didn't boot up on lubuntu... guess I'll back down a notch tomorrow and try again
10:06 AM Tom_L: jthornton, better than 18.04?
10:06 AM jthornton: yea it uses lxqt based on qt5
10:07 AM Tom_L: need a different kernel though ehh?
10:07 AM jthornton: I did notice it installs libra office
10:07 AM jthornton: I just tried the newest one that had a rt patch
11:08 AM perry_j1987: so when searching for threadmills i see some single point and others that resemble a tap
11:08 AM perry_j1987: how does that work
11:18 AM JT-Shop: single point threading makes one thread at a time and a full form thread mill makes all the threads at once
11:19 AM jdh: they are not helical?
11:20 AM JT-Shop: they?
11:20 AM jdh: multipoint thread mills
11:21 AM JT-Shop: no multipoint thread mills are not helical but the path you cut is
11:21 AM perry_j1987: having trouble visualizing it
11:21 AM perry_j1987: i can imagine a single point in helical motion working
11:22 AM perry_j1987: but multi point the others are just following in the channels that were already cut ?
11:23 AM JT-Shop: both types make a helical motion with the Z move equal to pitch, single point must make many circles to cut the thread
11:24 AM JT-Shop: https://www.youtube.com/watch?v=ZeeLTSOhI50
11:28 AM perry_j1987: so single point lighter forces but slower, multi point gets it all done alot quicker but much more force im assuming
11:28 AM perry_j1987: that animation was perfect for visualizing
11:35 AM JT-Shop: that is a real back plot :)
11:35 AM JT-Shop: yea single point cost less but takes longer to make the threads
11:49 AM perry_j1987: thinking about getting a parallel breakout board to throw in this 6040 now to run linuxcnc instead of mach3
11:53 AM gregcnc: wow US has withdrawn from the Universal Postal Union effective 10/17/2019
12:01 PM Jymmm: gregcnc: What does that essencially mean?
12:01 PM gregcnc: no more free shipping from china
12:01 PM jthornton: perry_j1987: you might want to see if the pc will run on linuxcnc debian 9 by using the livedvd
12:01 PM Jymmm: gregcnc: seriously?
12:02 PM gregcnc: I haven't read much about it yet, but that Union is why the US delivers mail from China at a loss
12:02 PM Jymmm: gregcnc: th'ts goig to seriously suck
12:03 PM gregcnc: you're paying for it now with every postal rate hike
12:07 PM jym: gregcnc: where did you see this?
12:08 PM gregcnc: China subsidizes the costs in china so it's free to shippers. china delivers it to the US and gets charged a minimal fee. US delivers the rest of the way at our expense
12:09 PM jym: gregcnc: That's gonna hurt a LOT of things
12:10 PM gregcnc: how would a few bucks change anything?
12:10 PM boddax: there any stm32 based controller?
12:11 PM gregcnc: anyhow UPU is considering it's options, so the outcome may be different http://news.upu.int/no_cache/nd/upu-issues-statement-on-postal-remuneration-rates
12:11 PM jym: gregcnc: There's that amazon/ebay "free shipping" mentality
12:11 PM gregcnc: which is why domestic sellers have a hard time
12:11 PM perry_j1987: free shipping allows me to stay at home and not meet anybody in the town i live in :P
12:13 PM gregcnc: I jus think it's crap that it costs me 15USD to ship my parts internationally, while China does so for free. not long ago international outbound was reasonable.
12:18 PM JT-Shop: try shipping something that weighs over a pound...
12:18 PM gregcnc: yeah i know
12:19 PM perry_j1987: imagine when we get all those BFR rockets flying around shipping packages all over the world same day
12:19 PM gregcnc: I should probably quit everything and start a amazon truck fleet
12:19 PM * JT-Shop goes back to fixing the mess he made at the CHNC
12:21 PM Loetmichel: gregcnc: not trucks
12:21 PM Loetmichel: quadrotor drones ;)
12:21 PM gregcnc: pfft, if that ever succeeds I'll be surprised
12:22 PM gregcnc: Is DHL still flying drones in DE?
12:22 PM * Loetmichel too, but probably for different reasons
12:22 PM Loetmichel: i dont see the tech fail, i see people steal the drones in droves
12:22 PM Loetmichel: no idea if they are still testing
12:23 PM gregcnc: they had a decent system, that I thought made some sense
12:23 PM Loetmichel: ... or shoot the drones down because they thought they were spying on them
12:24 PM Loetmichel: or people suing amazon for injury compensation because the tried to catch the drone and got cut by the rotors
12:24 PM Loetmichel: and so on
12:24 PM gregcnc: all of that
12:25 PM Loetmichel: Drone packet delivery to the private customer will simply fail because of said customer
12:25 PM Loetmichel: :-=
12:25 PM Loetmichel: )
12:25 PM gregcnc: what about weather limiting availability?
12:25 PM * Loetmichel flied drones in 70kph winds and horizontal rain
12:25 PM Loetmichel: the tech can cope with that
12:26 PM Loetmichel: s/flied/flew
12:26 PM Loetmichel: <- bad english ;)
12:26 PM gregcnc: while carrying a package and 30km range?
12:26 PM Loetmichel: if you can call a DSLR a package: yes ;)
12:27 PM Loetmichel: bit that gets easier with size, not harder
12:27 PM methods_: thats' what she said
12:27 PM Loetmichel: so a big drone that can carry a standard 5kg package will fly a LOT more stable than my little 1.5kg TOW ones
12:29 PM gregcnc: a few lawsuits from crashed drones and it will be over
12:30 PM Loetmichel: gregcnc: indeed
12:30 PM Loetmichel: or a after a few 100 "mysteriosly disappeared" drones
12:31 PM gregcnc: who has the rolling mailbox from which you pick up your box?
12:31 PM Loetmichel: IIRC the german DHL tested it for blood and medical drug delivery from clinic to clinic.
12:31 PM Loetmichel: that could work, because it dosent involve "customers"
12:31 PM gregcnc: zipline is doing very well in africa
12:35 PM Tom_L: they're the same but one has more cutters
12:35 PM Tom_L: woops scrollback bites again
12:39 PM FinboySlick: perry_j1987: I have a video of my LinuxCNC machine single-point thread-milling. Depending on material and hole, it can still go relatively fast.
12:40 PM perry_j1987: looks like there is some single point threadmills on ebay for 30 bucks
12:41 PM gregcnc: redtool?
12:41 PM Tom_L: https://www.youtube.com/watch?v=JkAAWT7Nxd8
12:41 PM Tom_L: perry_j1987
12:42 PM Tom_L: http://onlinecarbide.com/sipithmi.html
12:42 PM Tom_L: http://onlinecarbide.com/threadmills.html
12:42 PM Tom_L: both styles
12:43 PM FinboySlick: perry_j1987: https://www.youtube.com/watch?v=ZX6bvPdfElE It's better to start from the bottom that way you don't end up having to crush a bunch of chips at the bottom (on blind holes)
12:43 PM Tom_L: and it's climb cutting
12:43 PM Tom_L: i go from the top down on the outside
12:44 PM Tom_L: i run mine slower because of the spindle motor
12:44 PM Tom_L: you could run them alot faster
12:45 PM gregcnc: single point is flexible: ID, OD, various pitches
12:45 PM Tom_L: that's one reason i went with them
12:45 PM Tom_L: they both have their tradeoffs
12:48 PM Tom_L: FinboySlick what feed/speed did you use on that?
12:48 PM Tom_L: is that plastic?
12:48 PM FinboySlick: Tom_L: I don't remember. It's acrylic, yes.
12:49 PM FinboySlick: It melts so easily that I tried to avoid going too slow.
12:49 PM Tom_L: black acrylic is horrible about heat
12:49 PM FinboySlick: Tom_L: Yeah. I suffered my lack of compressor a lot during that job.
12:50 PM Tom_L: years back i made some aquarium parts with clear and black and the black was horrible to work with
12:51 PM FinboySlick: Tom_L: Is the link you sent your new bolt-moving mill? ;)
12:51 PM Tom_L: yep
12:51 PM Tom_L: :)
12:51 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/temp/skimmer/skimmer.jpg
12:51 PM Tom_L: the yellow was black plastic
12:52 PM Tom_L: protein skimmer for saltwater tank
12:52 PM FinboySlick: Tom_L: I ended up using those computer cleaning air-cans. The cold really helped prevent gumming.
12:52 PM gregcnc: not a tramp oil skimmer?
12:53 PM Tom_L: the wheels work pretty good for oil skimmer
12:53 PM Tom_L: my mill is mist coolant only though so it doesn't matter
12:54 PM FinboySlick: Tom_L: I like that you kept the sherline head :)
12:54 PM Tom_L: it works. that's about all i can say about it
12:54 PM FinboySlick: Welded steel construction?
12:54 PM Tom_L: yeah
12:55 PM Tom_L: it's not perfect but it does rather well
12:55 PM Tom_L: i'm rather impressed with the steppers
12:56 PM Tom_L: running about half current direct drive they didn't stall
12:56 PM FinboySlick: I've considered hollow tubing machine which I would pepper with coarse-thread screws then fill with epoxy concrete.
12:57 PM Tom_L: ppl said i may need to fill mine but it does fine
12:57 PM Tom_L: fairly thick wall 2" and 4" on the riser
12:58 PM FinboySlick: Tom_L: Yours is sort of skinny. I'd build a box around it and encase it instead.
01:00 PM FinboySlick: I have the same sherline you used to have too. Almost never got to use it, it's just gathering dust.
01:00 PM FinboySlick: Their lathe as well.
01:00 PM FinboySlick: The long one.
01:01 PM jthornton: Tom_L: will any of the thread mills you have do a 3.5mm pitch?
01:13 PM Connor: OKay.. so, anyone know how the touch signal probe suppose to work with a height gauge? Looks like it just beeps when it touches.
01:19 PM Connor: Looks like when it beeps, it holds the measurement. I'm trying to figure out how you zero it out.
01:19 PM Connor: No youtube videos on it. :(
01:21 PM Tom_L: jthornton, what's that translate to in english?
01:21 PM Tom_L: :)
01:21 PM Tom_L: but probably so yes
01:21 PM Tom_L: the 3/4 one might
01:22 PM Tom_L: it does from 10 to 32 tpi
01:27 PM Tom_L: what is that, about 13 tpi?
01:32 PM Tom_L: FinboySlick i've had the sherline for probably 25-30 yrs
01:33 PM Tom_L: now it's all safe in a box
01:34 PM gregcnc: 3.5mm pitch is substantial
01:36 PM Tom_L: if i figured right it's about 13.77 tpi?
01:36 PM Tom_L: which is well within the range of the 3/4" butter
01:36 PM Tom_L: cuter
01:36 PM Tom_L: i give up..
01:36 PM gregcnc: no, ~7.25tpi
01:37 PM FinboySlick: Tom_L: Hmmm, I got mine around the year 2000 too.
01:37 PM Tom_L: then it would require the 1" thread mill
01:37 PM Tom_L: or it would cut shallow
01:39 PM Tom_L: i calculated the thread pitch
01:39 PM Tom_L: https://www.fastenermart.com/understanding-metric-fasteners.html
01:40 PM gregcnc: 13.77 isn't the thread pitch either?
01:40 PM Tom_L: .1377
01:40 PM gregcnc: .1378" pitch
01:40 PM gregcnc: inverse is TPI
01:41 PM Tom_L: it would require the 1" cutter then
01:41 PM Tom_L: only $150
01:42 PM Tom_L: you _could_ set it up with a boring head if you have one
01:42 PM Tom_L: and a lathe single point tool
01:43 PM Tom_L: unless they're cut backwards
01:48 PM Tom_L: bbl
02:04 PM gregcnc: https://www.instagram.com/p/ByYCvWRJVo5/
02:08 PM gregcnc: bedtime stories https://www.amazon.com/dp/0578488574/
03:09 PM Deejay: gn8
04:28 PM Sabotend_ is now known as Sabotender
05:26 PM _unreal_: sweet just got my NEJE laser engraver
05:27 PM _unreal_: $60 USD shipped from china couldnt argue with the price
06:13 PM andypugh: _unreal_: Does it actually engrave?
06:16 PM Tom_L: hah
06:20 PM * SpeedEvil thinks of https://www.youtube.com/watch?v=5dpLOXeR7bk
06:21 PM SpeedEvil: The MicroSlice | A tiny Arduino laser cutter & engraver.
06:21 PM SpeedEvil: 2013
06:25 PM _unreal_: I have not even plugged it in yet but yes
06:26 PM _unreal_: 1000watt laser on it
06:32 PM _unreal_: oh wow they bumped the price up $10 I got it and shipped for $63 USD total
08:24 PM perry_j1987: got myself a thread mill enroute now :)
08:27 PM D__ is now known as Guest27765
08:54 PM Tom_L: what size?
09:09 PM perry_j1987: it should let me do 1mm pitch threads
09:10 PM Tom_L: from where?
09:19 PM perry_j1987: ebay
09:20 PM perry_j1987: https://www.ebay.com/itm/M6-45-1-00mm-SINGLE-PITCH-THREAD-MILL-BRAND-NEW-TiALN-COATED/152020605836?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
09:33 PM Tom_L: you do mostly metric threads?
09:33 PM perry_j1987: ya
09:34 PM perry_j1987: so much easier thinking in metric
09:34 PM Tom_L: are those carbide with a coating?
09:34 PM skunkworks: I am multi-dimensional...
09:35 PM Tom_L: i've done both but prefer imperial
09:35 PM perry_j1987: using premium 10% cobalt micrograin
09:35 PM skunkworks: From pica's to mm'ers to inches...
09:35 PM perry_j1987: TiALN coated
09:35 PM Tom_L: the ones i linked are pretty nice and would do metric threads
09:35 PM perry_j1987: I just dont like fractions heh
09:36 PM skunkworks: http://electronicsam.com/images/greenmachine/IMG_20190603_183551.jpg
09:36 PM Tom_L: what determines the range is the size of the point
09:36 PM Tom_L: it needs to fit in the smallest hole but not bottom out on the larger pitch
09:37 PM Tom_L: sam, you have such tiny machines!
09:37 PM skunkworks: That chuck was off a cincinati we need to get running...
09:37 PM skunkworks: some day
09:38 PM Tom_L: where do you find room for all these toys?
09:38 PM skunkworks: 5 inch through hole...
09:38 PM skunkworks: well - we have a finite amount of room - but I think we have the machines we need.
09:38 PM skunkworks: not all running yet.
09:38 PM skunkworks: :)
09:39 PM skunkworks: it is 40X80ft shop
09:39 PM Tom_L: use them for work or play mostly?
09:39 PM skunkworks: play
09:39 PM skunkworks: dad is retired - I use them for tinkering...
09:39 PM Tom_L: i'd like to see mine pay for itself but i'm not all that concerned about it
09:39 PM perry_j1987: whats a chuck like that weigh
09:40 PM Tom_L: you move it with a hoist
09:40 PM skunkworks: we figure about 300lbs
09:40 PM perry_j1987: no one handed holding it while fishing the bolts to affix it to the chuck adapter eh
09:40 PM skunkworks: yes - well - we needed to get it off the lathe and then to where the hoist could pick it up...
09:40 PM Tom_L: that's your horizontal it's sitting on right?
09:40 PM skunkworks: some elbow grease..
09:40 PM skunkworks: yes
09:41 PM skunkworks: perry_j1987: no. it was suspended by the eye hook on the chuck
09:42 PM skunkworks: https://www.youtube.com/watch?v=NA7UU93ycL8
09:43 PM skunkworks: keeps us out of trouble...
09:46 PM skunkworks: mostly...
09:47 PM perry_j1987: just need to strap a router on that giant xy axis and have couple guys help you heaft a sheet of plywood up in the air for it to cut :P
09:47 PM Tom_L: perry_j1987 what have you been using for cad cam?
09:47 PM Tom_L: f360?
09:48 PM perry_j1987: ya
09:49 PM skunkworks: perry_j1987: we have thought about using the gantry for a plasma...
09:50 PM skunkworks: I use acad12 and fusion 360...
09:50 PM skunkworks: most of my gcode is handmade though...
09:50 PM skunkworks: or acad12 and ace conveter.. :)(
09:51 PM Tom_L: years back i knew a guy that did 3d parts with acad and a plugin
09:51 PM Tom_L: never quite understood that
09:51 PM Tom_L: ncpolaris it was...
09:51 PM skunkworks: fusion 360 is pretty awesome... I just haven't had the time to really play with it
09:52 PM Tom_L: my year went up and i don't think i ever actually tried it
09:52 PM skunkworks: I have 3d printed a few things out of fusion.. but no actual mill gcode..
09:52 PM skunkworks: or lathe for that matter
09:52 PM perry_j1987: you can re-up on f360 Tom_L
09:53 PM Tom_L: i've got an old cad cam copy i'm used to
09:53 PM Tom_L: not modern day solid modeling but it does full 3d
09:53 PM Tom_L: and lathe
09:54 PM Tom_L: i've only used the lathe twice i can think of
09:55 PM skunkworks: this was fusion and printed...
09:55 PM skunkworks: http://electronicsam.com/images/greenmachine/Screenshot_2019-03-12_18-32-52.png
09:56 PM perry_j1987: I use a macbook pro which is absolutely amazing with its touchpad and fusion360
09:57 PM Tom_L: if i _need_ a solid model i generally do it in catia
09:57 PM Tom_L: then export it to my cad
09:57 PM skunkworks: https://www.youtube.com/watch?v=YEPBl9W6PyE&t=
09:57 PM perry_j1987: i gave a try on a surface pro 3 with its pen and fusion360
09:57 PM perry_j1987: i cant get use to it at all
09:57 PM Tom_L: pens are a waste of time imo
09:58 PM skunkworks: I do - linux - vm - windows10 + video passthrough...
09:58 PM Tom_L: cute spindle cooler
09:58 PM skunkworks: Tom_L: umm... it does this.. https://www.youtube.com/watch?v=F7QulGiMt20
09:59 PM Tom_L: nice
09:59 PM Tom_L: like i said, you get tired of that spindle send it my way
10:00 PM skunkworks: https://www.youtube.com/watch?v=GScFjhaTWnA
10:00 PM perry_j1987: may have competition there tom... what if im closer :P
10:00 PM skunkworks: I have cute kids too...
10:00 PM Tom_L: don't blink... they'll be in college
10:01 PM Tom_L: my youngest is 18
10:01 PM skunkworks: I try not to think about it...
10:02 PM Tom_L: won a skills competetion and got hired in at a shop working with some DMG Moris
10:02 PM Tom_L: 5 axis
10:02 PM skunkworks: she needs paper towel rolls behind her...
10:02 PM Tom_L: heh
10:02 PM skunkworks: Nice!
10:03 PM Tom_L: aparently they've got some big machines there as well
10:03 PM Tom_L: gantry etc
10:03 PM skunkworks: can't you get a tour? part of being a papa...
10:03 PM Tom_L: it's closed door
10:03 PM skunkworks: darn
10:03 PM Tom_L: due to contracts etc
10:04 PM Tom_L: alot of military aircraft parts etc
10:04 PM skunkworks: nothing an nda wouldn't fix...
10:05 PM Tom_L: the 5 axis is 50 taper
10:05 PM Tom_L: running ~400 ipm
10:05 PM skunkworks: wow - we don't have anything 50 taper.. We used to have a B&S that was a 40 iirc
10:05 PM skunkworks: nice
10:05 PM Tom_L: my but had a couple 50 but most of his were 40
10:06 PM skunkworks: stuart had a really cool gantry that was like 40 ft long.. 5 axis
10:06 PM Tom_L: i'm not sure i saw that
10:06 PM Tom_L: he walked me thru but it's hard to recall everything i saw
10:06 PM skunkworks: right
10:06 PM Tom_L: i saw the cincinati
10:07 PM Tom_L: wonder how he's doin since he moved on from there
10:07 PM Tom_L: i'm only a couple miles from there
10:08 PM ziper: can you put a 3 jaw chuck on a horizontal mill
10:09 PM Tom_L: just say you can't and see what happens
10:09 PM ziper: i cant put a 3 jaw chuch on a horizontal mill, help
10:11 PM Tom_L: make an adapter?
10:11 PM skunkworks: hey - there is peter! http://electronicsam.com/images/KandT/Fest2013/DSC_3879.JPG
10:11 PM CaptHindsight: skunkworks: real bad mosquito year
10:11 PM Tom_L: he wasn't there the day i stopped by
10:12 PM Tom_L: which one is he?
10:12 PM CaptHindsight: in the chair
10:12 PM Tom_L: i kinda figured but wasn't sure
10:13 PM skunkworks: skunkworks: today was the first time the mosquitos where bad..
10:14 PM skunkworks: the knats are brutal
10:14 PM skunkworks: Thought I had a picture of his gantry but cannot find it
10:14 PM Tom_L: all this rain i keep waiting for em
10:15 PM Tom_L: the EDM was kinda cool i thought
10:16 PM skunkworks: all of his machines were kinda cool :)
10:16 PM Tom_L: well.. yeah
10:16 PM skunkworks: Liked his toyotas... reminded me of the K&T
10:17 PM CaptHindsight: https://youtu.be/jHbI_B2sPA0?t=77 cnc crash, hurrts to watch
10:17 PM Tom_L: they took that one bad one offline
10:20 PM Tom_L: the one where it bends the drill moving in x and z i almost experienced when i first started using linuxcnc because i didn't know all axis would move at once on homing
10:21 PM Tom_L: fixed that straight away
10:21 PM CaptHindsight: happened to me once during home
10:21 PM CaptHindsight: was dry run without a cutting tool
10:21 PM Tom_L: mine was during setting the machine up so also dry run
10:22 PM CaptHindsight: I broke my favorite end mill the MPG too fast to start a manual pass
10:22 PM CaptHindsight: by cranking
10:23 PM CaptHindsight: silly things you do when in a hurry
10:23 PM perry_j1987: i havnt had an endmill around long enough to become a fav...
10:23 PM CaptHindsight: hah
10:23 PM perry_j1987: i should probably stop trying to feed this 6040 endmills one day and get a real mill
10:23 PM perry_j1987: haha
10:24 PM Tom_L: my local guy has alot of 'used' new stock i can get for like a buck a piece or sometimes less
10:25 PM Tom_L: some may be a little oddball
10:25 PM Tom_L: like the time i needed a 10mm reamer and got a reverse flute one but it worked fine
10:28 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/thread_mills/Reamers.jpg
10:28 PM Tom_L: the middle one