18.84mm / 2000 = 0.0094 mm per step
well that isnt to bad?
could maybe take the gear ratio to 4 to 1?
actually, the mm per count isn't too bad
lets look at torque now
any idea how much cutting force you will need?
not a clue... dont know how u would figure that out?
you've run a wood router manually, right?
actually, lets go from the other direction
lets assume you have a 500oz-in NEMA 34 stepper - not too hard to find
(you can get as much as 1200 oz-in, but they are more expensive)
Yuga: i like the first machine on this website: http://www.ronchinimassimo.com/feedback.htm
lol... was looking at a 1200 oz-in one
ok, lets assume 1200
for wood, big area should be nice
[00:03:20] <Yuga> http://www.campbelldesigns.com/stepper-motors.php
<--- bottom stepper
yes Jacky^... that's what i need
Jacky^... send me one :P
i like the project
the website i pasted have no price's list..
this sound to me very strange
1200 oz-in *25.4 = 30480 oz-mm / 16 = 1905 lb-mm
sorry about mixed units
oz-in to metric is a messy conversion
jmkasunich... that's like a half a ton of pressure.. think it should be enough :)
anyway, with a 9mm radius on your pinion, you get 1905 lb-mm / 9mm = 211 lbs
sounds like plenty to me (but not a half ton - gotta account for the size of the pinion)
that is assuming 1:1 gearing, not 3:1
didnt think of the pinion
* alex_joni_ goes to sleep
still assuming 1:1, we're back to 56.54mm per rev, or 0.0287mm per microstep
jmkasunich: thanks for the tips ;)
ok... so jmkasunich... u say it's going to be about 211lb's of pressure?
approx - I'm neglecting friction and such
ok... so what next?
you should be able to get about 10000-20000 microsteps per second
start with 10000
if each microstep is 0.0287mm, then top speed is 0.0287 * 10000 = 287mm/sec
times 60 is 16.9m/min
that is pretty darned fast
so you could gear down
guessing it would be better to gear down more
2:1 would mean step size is about 0.014mm, max force is about 400 lbs, and max speed about 8m/min
note - with steppers, max force is stall force, you don't want to use more than about half of that
3:1 would give you 0.009mm steps, 600 lbs stall force, and ~5 m/min
but you need to make sure the gears cah handle 600 lbs without stripping
ok... so what u recon i should make it? dont think u realy need 600lb's?
anyway, you see that you can get pretty decent performance with steppers - I don't think you need servos
if you use cheaper 600oz-in steppers, the force would be about half
I can't tell you what to do, I can only tell you how to work the numbers\
you need to figure out for yourself what cutting forces you expect, what resolution you need, and what speed you want
jmkasunich.. yes... but i dont think i need 600lb's of force?
first, you don't get 600 lbs usable force, at 600 lbs the motor will stall and lose steps
and it's not worth buying 600oz steppers cause the once 2 times that force are only like40$ cheaper
friction, inertia, and other things will take some of it, and you always need a safety margin
jmkasunich... i know u cant tell me what to do... but what would u recomend?
3:1 gear ratio?
I would assume 50%, so 3:1 gearing would give you about 300 lbs usable
I know from running a manual wood rouger that the forces are much less than 300 lbs in wood
now look at resolution - what kind of work are you doing - rough hogging work, precision jointery, or tiny engraving?
pretty much going to be used for making speaker cab's
but would like to do some engraving
3:1 gives you about 0.009mm per microstep, probalby about 0.05mm to 0.10mm usable accuracy
final thing is speed
3:1 gives you about 5.5m/min speed
or 30 seconds to make a 2.5m long cut
well that's more than fast enough for me :)
have you made speaker cabinets with a manual wood router? can the router cut that fast?
it's not the cutting speed... it's the precision
and not all speaker boxes are square :)
ok then... 2:1 would be faster, but less precise
and not as strong
Yuga: i'm burning all bits..
speed is important on wood
Jacky^... how fast u cut?
Jacky^ well get more than 11IPM =)
well the gear ratio is easy to change so i dont mind changing it if i have to :P
4:1 would be slower, stronger, and maybe more precise (only maybe, because you may be limited by the R&Pm not the step size)
Yuga: mine actually machine its a toy.. but take a look here: http://www.woodweb.com/knowledge_base/CNC_tooling_Whats_the_best.html
I would think 2:1 or 3:1 is about right, and 1200oz-in steppers are plenty, no servos needed
jmkasunich... what speed do most wood routers cut at?
i am guessing 200ipm?
jmkasunich : "no servos needed" - When would you suggest servos be used (generically I mean)?
damned if I know, I'm an engineer, not a carpenter
Yuga: wich wood will you use for speakers cab ?
when steppers aren't good enough (or when you find a batch of servo motors and drives at a great price)
have always been worried about loosing steps with steppers
jmkasunich lol, well the later is implied =) But when are steppers not good enough (considering almost unlimted torques rated steppers are available)
stepper torque drops off with speed (oops, a factor which I completely ignored just now)
servos on the other hand like high speed
jmkasunich... so the 10000 step's wouldnt be to fast?
OK, take that 50% torque derating and turn it to 75%
that means you'll get perhaps 150 lbs with 3:1, 100 lbs with 2:1
Yuga - there are a lot of factors that go into top speed
I'm assuming you are using good drives like Gecko or Rutex, and that the drives and especially the power supply are properly matched to the motors
jmkasunich.. the site that i was planning on getting the motors from recomend geckodrives
so that's what i am using
you should read and understand there stepper motor white paper
there isnt a paper on there stepper
Jymmm: should the new nema34 be a good choice ?
i'm also interesting in wood cut
how big's your machine Jacky^?
1 mt x 80
hehe... almost cute it's so small :P
Yuga: go to www.geckodrive.com, click support, scroll down
"The Step Motor Basics White Paper"
how much are big yours speakers ? O_o
the bigger i know are lectrovoice made in us
[00:31:28] <jmkasunich> http://www.geckodrive.com/ycom/documents/C163R21_step_motor_white_paper.pdf
woofer 1 mt diameter :D
i will eard you from here hehe..
using 18" sub's
separates box ?
separates box ??
all speakers in the same cabinet ?
all in seperate boxes
Yuga: looks like the pros are running up to 1000ipm (25m/min)
but they also have 10HP spindle motors ;-)
jmkasunich... i'm no pro... just a poor speakerbox maker :)
and i am only goint to mount a normal wood router to my machine
Yuga: whick speakers ?
Jacky^... run a pure RCF system
I would go 2:1 or 3:1 (or maybe compromize 2.5:1) with 1200oz-in NEMA34 steppers, Geckos, and a properly matched power supply
and crown amps
RCF from italy..
jmkasunich... what powersupply would u recomend? voltages and amp's
rcf bad speakers?
lol... nice try
read the white paper... it needs to be matched to the motor
would take them over jbl any time :)
Yuga: try dynaudio
and you'll see
Jacky^... give me a website :)
try midrange focal
jmkasunich.. i heard something about using high voltages cause the stepper will work faster?
yes - higher voltage helps the stepper maintain high torque at high speed
voltage too low and the torque falls off very fast as you speed up
voltage to high and you overheat the motors
the whitepaper explains (better than I can) how to pick the right voltage, but you must know the motor specs first
jmkasunich... what would be to high a voltage?
depends on the motros
must realy find a pdf on those motors
download the paper, read it, understand it... it is really very will written, and very educational
Jacky^... so whats the website... or cant they afford one?
Yuga: ive some old catalog here
years ago i request it
@ moment ..
old catalog's... probibly out of business :)
old catalog, not old tecnology..
jmkasunich... what linear rails would u use?
was planning on using precision round bar with linear bearings
I've never built a router - I know about motors and drives, and I can do the math
jmkasunich : Mariss white papers are not written for the low browed, It took me a few reads to finally go 'ah I get it' (plus a two hour phoen call to him =)
so how the hell am i going to figure it out :P
Yuga read it 20 times instead of three =)
got a killer deal on some PCB bits today
Yuga: here's some tweeter http://www.speakerbits.com/net/catalogs/cat8.aspx
like it or not, you are designing a machine here.. you need to act like a machine designer
that means read, learn, do the math
Yuga: but googling youll find also nice woofer :P
jmkasunich... was joking
Jacky^... doesnt look like a pa tweeter
what ? the price ? :D
it's high-fi stuff
i eard this speakers
it's another world
Jymmm: I must disagree... granted, I'm not a layman, but I think Mariss's papers are much more accessible to the layman than many other source of documentation
with spectral amplifier..
i also like focal as midrange, you could try it
you do have to be willing to learn and understand what is going on, rather than simply looking for a cookbook approach
rcf suck !
Jacky^... i run a DJ system
no audiophile ?
no party :P
carry on dreaming
lol... there big speakers are such a JOKE!!!
cough... they like tweeters :P
jmkasunich Compared to a mfg's data sheet, yes Mariss are easier to understnad. But, when I read his paper regarding 'mid band resonance' (as an example) I read it, but I didn't get it till he actually explained certian aspects to me on the phone. The paper is written that there is an assumption that the reader is familure with the aspects of stepper motors. So, someone even with a technical skillset just getting into 'steppers' is like being in a foreigh
my smallest amp would smoke them :)
thanks for the info jmkasunich...
Jymmm: ok, I'll admit that mid-band resonance is tricky, but that chapter could be skipped by someone doing a machine design
in fact I myself don't really grok mid-band stuff, but I also don't need to know
the rest of the stuff in that paper is really good info though
and BTW - where else would you find a guy who would a) actually answer the phone and talk to you, and b) take the time to explain that
Mariss is a class act IMHO
jmkasunich : Right, but that is because geckos compensate for it. Now, when you buy a Xylotex drive, and then experiance the stepper stalling, and wonder if it's the machine, driver, motor, controller, computer, parallel cable, etc. It would really be nice to see a statemnt like "Even the most expensive stepper motor is suseptable to mid band resonace (or stalling).
If I knew then what I know now, I would have just bought geckos from the beginning.
Yuga: i suggest to you build a box like this for the woofer: http://www.royaldevice.com/custom.htm
that's why I'm glad to see Yuga going that direction
btw anyone know the diameter thats commonly used to do PCB's?
Jacky^... built one similar to that in a club :)
60 mt cubes ..
wish they would give the friggin spec's!
friggin hell that is awsome
when i say i made one similar... it had 2 subs :P
got a pictures ?
was long before the time i got a digi can :P
plz dont tell me that's in some chap's lounge!!!
110 dB/1W/1 meter sensitivity starting from below 10 Hz focused on the listening position.
now that is impressive
considering we cant hear below 25
22 hz i think
22/25... same thing :)
depend on the ear used
glad u can hear it :P
a big ear can :P
friggin hell... 6.5kwatts in a 6x8m room
i use that for a party of 1ooo ppl :)
i think power is intended as peaks
well i dont think they ever get to 6.5kwatts
but if they wanted to they could :P
peaks of infarct
on low frequency i think could be true..
Yuga: tried mdf for the cabs ?
it seem to be nice material
Jacky^... it is better to use
but not practicle
it's heavy... and if it gets wet it falls apart
plywood is more practicle thatn mdf?
and wood fubars when wet
Jymmm... the thing is if mdf gets wet it's compleatly stuffed
and 'heavy' is a good thing in speaker boxes - more density
for resonance mdf should be better
and it's ALOT heavyer than mdf
Jacky^... yep... it is better for the sound
but isnt as practical
well WTH you making speaker boxes out of plywood then?!
currently i have boxes that weigh in at 100kg's
a coat of polyurithan works wonders
probibly be more like 120-130 if it's mdf
Jymmm... yes.. but it's heavy
you are already at 100kg, whats an additional 25?
makes a difference if you have to lug them to gigs...
thats what roadies are for!
and believe it or not speaker boxes get scratched... then water gets in
for every band with roadies, there are 5 that haul their own stuff
i'm not a band. i'm a dj
usualy have one chap that helps me out... so weight is a issue
same principle tho, you have to move it yourself
Can SSR's be driven DIRECTLY from the parallel port?
change of subject :P
that is a definite maybe
depends on how much input current they need
if you have a +5v supply, and let the parport pull down to turn on, you can probably do it
parport inputs are similar to the opto on a gecko step or dir pin
same rules will apply
s/parport inputs/SSR inputs/
so I should still use a opto isolatation and maybe a driver too?
most SSRs have an opto on their input
Jacky^... les is into speaker design... interesting fact i leant the other night
so no additional isolation should be needed
page 3 http://www.opto22.com/asset/documents/0859_Solid_State_Relays_data_sheet.pdf
Yuga: cool :) i know.. les have a great experience
especially with wood
damn, only says voltage needed, not current
also says input resistance
I = V/R
3v at 3mA
for the ones rated at 1000 ohms and 3V
those will probably work from a parport
almost certainly will work if you supply +5 and let the parport pull down
110A surge should be ok for a 2HP router
marginal, but might work if you want the parport to pull up (saves the 5V supply)
110A is for 1 cycle
router takes longer than that to start
you'll probably be ok, but 120D25 is a more conservative choice
what is the price difference?
$12/$18 I think
$12 for the 10A one, $18 for the 25A one? then I'd use the big one
it will run cooler too
ah, ok. I always forget and thermal
read the rest of the doc (I didn't)... those things often require heatsinks to achieve rated specs
ok... i'm off to bed
Jymmm: a good idea could also be to add a fan to the box
thanks for the help again jmkasunich
the bigger one will probably need less heatsink
jmkasunich +5v and let para pull DOWN?
yes - parports can sink more current than they can source
+5---10K resistor---SSR----par port pin (active low)
Jacky^ good idea
the SSRs have built in resistors - didja see the part where it says min turn on voltage 3v protected to 35V (or something like that)?
no resistor needed
saw that, dind't know what it means
means it's not a raw LED input, you don't need a current limiting resistor
When all this comes together, it'll be really cool to press one button on the keyboard... vac turns on, router starts up, and a few seconds later the machien does it's thing, then turns everything else back off =)
jmkasunich Silly question... If I want to manually turn on the SSR, would it be a 1K resister to ground?
so I done blow up the para port
or should I just use a SPDT (center off)
bed calls.. night all
anonimas1 is now known as anonimasu
could anyone help me with running BDI?
what's the problem?
when it's time to run X-server...
it's trying to run
and it stops
during install? or afterwards?
without any error
yes, during install
I tried to run it on vmware and it worked fine
but on my PIII 550Mhz it can't be installed :/
I tried also many kernel option during boot
but it didn't helped
hmm.. might be a something the installer is not detecting
that's part of debian's anaconda
can't help you there
i tried linux noprobe
but you have 2 options
1. wait for the next BDI in a few weeks :(
2. install on a different system
then move the HDD over to this bx
it should work
can you do that?
is there possibility to run BDI installer in text mode?
don't think so :(
I think I have to ;]
I just installed for a PII-233
but that was too slow/crashed eventually
so I installed on a 1.4 GHz Athlon
and moved the HDD over at the end
just thought of option nr. 3
then follow http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?DebianInstall
should be failry simple
can't type.. not fully awake yet ;)
it sounds reasonable ;)
I've debian already on CD...
ok, I'll try that way ;]
well. that's what I would do
thank you very much for help
what graphic card do you have?
because that is a known problem with the current BDI
no on-board, some common PCI or AGP, I even didn't know, but surely not on-board
yes, I know, I read your page
maybe try another one..
[09:45:11] <barca> http://linuxcnc.org/bdi/
I thought you're member of cnc project :P
but the BDI is paul corner's baby ;)
he's not around right now :P
I'm just helping out where I can :)
ok, thx again, I will try to install debian and apt-get emc ;)
report back any success :D
this looks nice: http://www.maxonmotorusa.com/files/catalog/2005/pdf/05_265_e.pdf
* paul_c slaps alex_joni around a little with an old fish
that's for taking care of your BDI users?
ah.. just for fun?
"I would suggest to give emc2 a spin if things don't work out with
heh.. what's wrong with that?
"Has anyone running or tested emcsegmot and Steppers like freqmot?"
it certainly makes his life/mess a lot easier
Till is using segmentqueue
and adding master/slave
heh.. don't answer
'cos it's there, and he can ?
master/slave should go to emc2
* alex_joni hides
Imperator_ is working on that afaik
at least he plans it
hey there Jacky^
alex_joni is now known as alex_joni_away
Jacky^ is now known as Jacky^afk
alex_joni_away is now known as alex_joni
Jacky^afk is now known as Jacky^
* A_Guy slaps Jacky^ around a bit with a large trout
what are U drinking ? O_o
very dirty water
apple vs M$... on ipod patents
"In generale la nostra politica � quella di permettere ad altri di sfruttare i nostri brevetti per i loro prodotti",
M$: "In a generalized manner our politics are that one to allow to others
to take advantage of our licences for their products",
'tap tap tap' is this thing on?
knock knock knock..
when i find the chap who designed the plans for this speaker box i am going to KICK HIS ASS!!!
i have never in my entire life seen such shit plans
* paul_c adds a little something to da web page for M$ IE usrs.
paul_c : a virus?
A_Guy: try to listen this: http://www.spectralaudio.com/dma360.htm
whats that Jacky^?
something can send you to the other world, then come back :P
Jacky^... not realy that impressive
only draws 2000 watts
listen before talk..
I got a P3 733 for $15 on saturday, no hdd. I pulled out the hdd from my other machine that had BDI installed on it and installed it inot the new machine with the intensions of wiping the drive and doing a fresh install. For the hell of I decide to but up the hdd in the new machine just to see what would happen before wiping it... The damn thing booted up, found all the hardware and worked perfectly! lol
showing one area in which Linux is far superior to Windows
try that with Win2K, and you'll have a hard time booting (since it won't see the IDE controller), and then you may end up with two motherboards in the device manager
they aren't even the same mobo's.... one is an intel the other is an asus.
(one of which isn't working correctly)
right - it'll boot on any chipset that the kernel supports
one is pci video, the other being agp
do they have the same video card?
paul_c: i think 've fund my issue about feedrate ...
same brand, but like I said one is PCI the other is AGP
paul_c: i'm using isa parport ..
OK - same X driver - that's the thing that doesn't work so well on Linux - X isn't reconfigured at boot time
paul_c: what if i change it with pci parport ??
Jacky^... that doesnt look like to much of a serious amp
actual speed should be abou 20 us
A_Guy: you can believe me
I listen it
Jacky^: If you switch from an ISA parport to a PCI one...
just looking at the circuit... and current draw
to see where it is found.
paul_c: do you think pci parport will give better performance ? i think so ..
i want to check with scope
max rated pulses i get
i also have onboard parport
but i dont want to use it
if chipset burn, then mb will not work :\
i've not opto-isolation at the moment
Sounds like you have made your mind up already.
Jacky^: do you have geckodrives?
if you connect them directly your port wont die.
l297-298 homebuilt circuit
* paul_c disappears for a bit.
dosent say me anything
it's probably good...
but I wouldnt run un-isolated with it ;)
but I think ISA parport is slow
Jacky^ DUH! =)
anonimasu: i'm running unisolated a lots
before add any optoisolator i want to check real speed i can get
Jymmm: the mine is too slow for woodworking
Jacky^ have you tried to reduced the rpm on the router?
Jymmm: i bought a new router on ebay, im waiting to receive it
it has electronic speed control
should work ..
ah. what did you get?
about 1k watt
641 if i remember well
I JUST found out the REAL mfg of my Sears router.... Bosch
* Jacky^ listen michael buble' 'home'..
have i mentioned today that i am going to kill this chap who made this plan?
Yes. Several times.
thought i would just mention it again
cant you save the msg in a file ?
Jacky^.. it's just not the smae
what changed ?
i like the constant moaning... gives us something ti talk about
lol... downloading gummi bears... yes i am bored
the only reason i am downloading gummi bears is cause i cant find thunder cats :P
Jacky^... how old u?
nooooo... i didnt ask mental age... asked physical age
mnemonical age about 1024
i need to add another bank of 2048 :P
i'm 36 years old
you married ?
very very nice :P
never do it
current gf is already driving me mad... lol... dont think i can handle marrage right now :)
Jymmm... women are like leaches... they suck the life out of you.
i agree with you
ok... every one stop what u are doing and tell me what u think of my boddy kit i am fitting on my car
[20:17:45] <A_Guy> http://www.myride.co.za/uno/1.jpg
more like black widows
should I look at the pic now?
Jymmm...s o does your mother... but your father didint complain
A_Guy as does yours
* A_Guy get's the soap and washes mind
ok... night mares for weeks now
payback is a bitch aint it!
what is ?
so what u think of the bodykit?
Fiat uno ?
y am i crazy now?
just ignore the spraypaint on the bonnet :) got bored :P
Jacky^... what u got against my body kit?
an abortion of the nature
Jymmm... is Jacky^ always this crule and full of shite??? or u laughing at the bodykit?
03paul_c * 10emc/src/emcnml/initraj.cc: Move reading of DEFAULT_ACCELERATION down in the order else MAX_ACCELERATION is not honoured.
A_Guy: Jacky^ is never been mean or cruel as long as I have known him.
alex_joni: You're a M$ IE lusr aren't you...?
You don't wanna be going to my web pages then.
added a little something just for IE users
errr.. scuse me, but I would NEVER touch IE
I only started it once .. to download Opera
then used Opera to download firefox :D
wth is a 'spline' ?
determined by some points
depending on the grade
you have 3rd 5th, etc degree splines
they are actually based on a polinom
any reaosn why there would be issues importing/opening a file that has 'splines'?
a drawing/cad program
if it doesn't know how to handle splines.. yes
in that case you need to convert to curves
spline, curves, and now sergments?!
less the tpos =)
* Jymmm typoed typo
depends how stupid the cad is
more than one program bitched about splines
so, whats a segment?
* alex_joni is watching jerry springer ;)
STEVE! STEVE! STEVE! STEVE! STEVE! STEVE!
california is having a huge teacher shortage
about 52000 teachers are needed
sounds about right.
till 2007 students will be forced to have sex with each other
alex_joni: 52k is quite many...
yeah.. because of the lack of teachers
alex_joni Hey, we got all kinds of shit here, hard to keep up with it all
I created some artwork in Corel, saved as DXF, tried opening it up in DesKam and it bitched about 'splines'. Then tried opening the DXF in SW and it bithced about 'splines' again.
go back to corel
and you have an option convert to curve there
ok, let me try
cron's still working ;)
Damn, I did export text as curves, but DesKam is still bitching about exploding splines
Jymmm's splines are exploding
any suggested version to export to?
any suggested version to export to?
from corel I mean
* Jymmm smacks alex_joni with MS-PAINT!
lucky me I set up a zombie to take the slapping
homie dont think so!
paul_c has kicked alex_joni from #emc
Jymmm: Have another go ;)
* Jymmm smacks alex_joni_ with MS-PAINT!
who's alex_joni_ ?
Jymmm: try M$.doc
alex_joni_: welcome back mr Joni
seems my connection is crappy ;)
yes it is, sir, captain
ValarQ: how's crap going?
i haven't been working on crap for a while
think i have to do some clever gnome-canvas wrapper...
which slides should i use for a machine 1mtx1mt ?
24" I beam
Jymmm: some pictures ?
i was thinking something like this: http://www.baricentrorc.net/upload/rte/CNC/Attilio/passo1/01.jpg
may someone here can build these slides using his machine ?
i will pay for it :P
instead of buy it from skf :\
Jymmm: can you machine a slide like that ?
i eard in some forum, someone has do it
Jacky^: get IGUS
alex_joni_: what are ?
err.. not igus
lemme find the url
[22:05:08] <alex_joni_> http://www.hiwin.com/lg/index.html
this is cool: http://www.hiwin.com/lm/lmsp.html
alex_joni_: Damn, man I can't get it out of Corel and into something else worthwhile =(
Jymmm: too bad :(
alex_joni_ you're just in a mood today, huh?
yeah.. going to bed now
more than enough for a day :P
Jacky^: Hiwin should be in italy too
alex_joni_: ok, i will search, tnx
hows the storms?
no storms today
another plane crashed :\
hi les :)
jacky we often have thunderstorms in the afternoon
les : Oh, btw... My 'Sears Craftsman' router is really a Bosch router.
yes The Cyprus plane is perplexing
les: i'm looking for a good slides for my next machine
why did they not put on their oxygen masks?
not too much expensive, but strong
jacky hiwin 15mm rail is very good
Jacky^: See, alex JSUT told you that =)
how much ?
you know ?
what size machine?
about 1 mt
dou you know.. i'm working on wood
here perhaps US$500 or so...
500 $ anyone ?
i need two right ?
Your price might be very different
Jacky^: or INA
you need 6....2 for each axis
INA is fine too
les: he might get away with 1 bigger / axis
on Y&Z I think
X surely 2
also for Y
Y should be at least 80 cm ..
but the 15 mm is not so expensive
better to use two if you can afford it
i cant afford it teorically
but i will do :\
the 15 mm is not structural though...it needs to be bolted to something stiff
15 mm is soo small ;)
typically structural steel rectangular tubing
I just got some cariages to replace on a robot
i was thinking abou 40 mm
1m = ?? mm ?
about 80 mm wide
and 250 long ;)
alex_joni_ go to bed already!
8 of those on a C-frame :D
it is small Alex....but more than enough for a light duty wood router
I use 45 mm
* alex_joni_ nods
but mine is a heavy machine
les: i like 45 mm :P
les: I presume 4 ball lines?
15mm rail ~= $10/100mm
well it's fine.....Hope you have a good bank account
Jymmm: how much micron precision ?
Jacky^ go look it up! alex gave you the url!!!
max dynamic load for minr is 150 kN per axis
I don't think you need that!
les: how much static load will it take?
les: too expensive i suppose
More, but I forget the number
45mm rail == $240USD/m
max dynamic is for 10^6 maters travel I think
medium grade 30mm rail == $140 USD/m
Well the parts for mine were $20,000
and a year full thime
30mm rail == $140 USD/m its ok ..
Jacky^ : plus the blocks
and if i caluclated well..
I think 15 has a load of prob 20 kN or so
i need 4 right ?
30mm Bearing Block, Square == $75 USD/each
* Jacky^ mumble mumble..
* Jacky^ thinking
what brand jymmm
les I'm grabbing proces from automatic4less.com
many 1x2 meter use the 15 just fine if for wood only
they have rail in 5mm increments too
les : UID: A4L PW: order
they have a generic login
les: can u tell me please, what the best feedrate for woodwork ?
too fast possible , ok ..
les: jacky is having trouble with toold turning black
yeah, but it's not my only issue ..
$18 for a ESTOP button ?! wth
i'm actually kidding with a toy machine
a moment ..
i seen some nice pictures
that's cheap for a estop
and that excludes the actual electronics too!
but is in restricted area of a website..
my retailer at work takes 50$
i will upload it on my album to show it
screw that, I know where to get some arcade buttons =)
I checked the 15mm load rating: 10kN +. Plenty for you.
I used to buy from HIWIN direct but have not for a while...so don't know exact prices
typical router cutting force is only 100N!
les : Heh, they have a branch office 15 minutes from me =)
Hiwin rates their forces in kGf, but being an engineer I don't like such a unit. kG is a unit of mass!
Folks I must now go to a city hall meeting.
Back in a little while after I yess at poliyicians!
les got your soundtrack cd handy?
and amazingly...a storm is coming now!
I hear thunder
seems the 4 channel STG doesn't have any ADC's on it :(
no tach feedback
no wonder the values measured are always 0
anonimasu: use a proper drive for that
you do not need tach feed back anyway
drive -> motor
tach -> drive
encoder -> emc
you need 2 control loops
drive-tach for velocity
how seem to you ?
Current drive with velocity derived form encoder is typically used these days...works great. No second velocity estimator (tach)
yeah.. that too
That was only used long ago when computers were slow
they are still slow
for most of the tasks anyways
no no no tachs rock!
the same way resolvers rock.
les : pricing from hiwin directly is the same as A4L
back in 1975.
* paul_c kicks anonimasu in to the 21st century
back to the future
back to the present would be nice
wth is a 'light curtain' ?
i've lost time
what time is it ? O_O
[14:41:50] <Jacky^> what time is it ? O_O
[00:42] <Jacky^> what time is it ? O_O
* Jacky^ confused
well, ok.. i will buy hiwin slides, you agree ?
i will proceed in the next week
no way man, les and alex_joni_ know nut-ting!
03alex_joni * 10emc2/src/hal/drivers/hal_stg.c: fixed a typo on the ADC routine. adc needs testing by someone with a STG-I-8 board, the 4 channel seems to lack ADC's
les: think you have a STG ;)
alex_joni_ has changed the topic to: Welcome to the Enhanced Machine Control forum - Support and development of a linux based CNC control. | Home page www.linuxcnc.org | Regular Developer's meetings every Sunday between 14:00 & 18:00 GMT | General emc discussions and support the rest of the week.
ChanServ has changed the topic to: Welcome to the Enhanced Machine Control forum - Support and development of a linux based CNC control. | Home page www.linuxcnc.org | Regular Developer's meetings every Sunday between 14:00 & 18:00 GMT | General linux discussions and support the rest of the week.
how are things today paul_c ?
trying to sort out a problem with accel.
I still have no machine
here, have one of mine.
I dont have an active X session up at the moment :(
* Jacky^ yawns
I'll be heading to bed in a couple of minutes