how are you doing robin_sz ?
It doesnt seem as if anyone is on
robin_sz : anything new?
I ordered me a gasket kit and a climber manual
and just finished leak testing all the valves, things look good
my car exploded
well the negine
timing belt lost teeth ...
diesels are all interference engines
valve meets piston?
well, that sucks, hope it doesnt run you too much
nah, the car is dead, it was a cheapy
good evening, jmk...
How are thing on your coast this evening?
cold, as usual
have you heard about the EMC codefest plans?
hehe... I'm so glad not to live in a cold place anymore.
Nope, I'm unaware of codefest plans.
(BTW, I'm not on the coast, I'm in Cleveland OH)
Is NAMES coming up? That's when they did it before.
Oh... Ohio... That's not 'east coast' at all :) Just the timezone, eh?
NAMES is April 23/24 (Sat/Sun)
I'm originally from Chicago. I'm glad to have escaped snow...
the codefest will be the week after NAMES, starting Monday 4/25 and running till Thursday 4/28
we're having it at NIST, just outside Washington DC
nifty. Who's likely to attend?
you I hope ;-)
me, paul, ray, matt shaver, cradek (I think), jepler (I think), steve stallings
attendence is gonna be limited to folks with serious interest in coding on EMC, perhaps 12 people total
Welp, I just emailed myself a note to add it to my calendar when I get home and see what can be done...
last year we had some total newbies, folks who simply wanted to get a BDI install, etc...
helping those folks is important too, but you can't get much coding done while doing that
Hopefully we can continue to make that process easier so ordinary folks need less help, though... :)
Fred Proctor from NIST will be our host, but I don't know if he'll be involved constantly, or if he'll drop in as his job permits
Do you know roughly how many people are on the emc-users and emc-dev list? (I wonder stuff like how many people are trying emc, how many are using it, how many have interest in develping for it, etc in these cnotexts...)
yep... there will be another event at Roland Friestad's place (Cardinal Engineering in Illinois somewhere) in June - a NAMES alternative focused on CNC... we're planning to have a more user/integrator oriented thing there
Wow... That's a BUNCH of folks on the dev list!
most are lurkers
they read the dev list to keep abreast of what is happening, not because they're developing
Hmm... seems like an opportunity there to get involvement if we organized it right. But that's a big challenge. If even 1 out of 10 on the list contributed regularly.... wow...
there are 43 developers on SF, again many are inactive. In some cases, people asked to be added as developers just because it lets them avoid the 4-24 hour delay between developer CVS and anonymous CVS
there are 20 subscribed to the commit list... some of those are also just interested in knowing whats going on, but that is probably the closest we have to a list of active developers
I think I'm on there twice :)
firstname.lastname@example.org and email@example.com
(I'm list admin, I get to look at the membership ;-)
yup... you got it. It didn't like that i was submitted updates without being on the list, so I had to add the souceforge one...
(I know you're list admin... Which is why I asked you about numbers :) )
you need to be on there with your SF addy to avoid your commit messages from being bounced
the other addy is for receiving only
hmmm.... that's a way to identify the lurkers
anything other than firstname.lastname@example.org is a listen only address
lurkers arent' @sourceforge.net, I guess..
email@example.com _can_ commit (doesn't mean they do)
right. How many are lurkers vs. submitters?
8 from SF
wow... whittles the numbers down, doesn't it...
alex joni, cradek, ebo (he's gone for all practical purposes), jon elson, me, paul, ray, and some dude named zwisk
yeah, I'm bummed we lost ebo...
I think he could have been a good resource if we didn't have an impedence mismatch of personalities as a group with him.
I like that - impedance mismatch ;-)
(and I agree)
yeah... I just need to work on my spelling :)
I didn't even notice the spelling'
So, I've been doing some further conceptual refactoring of hal... I'm thinking maybe I'll try to use dia sometime and make some diagrams....
I've been distracted lately... busy week here
just blew up a prototype 1000HP drive at work
yeah... same here. It's hard to find time for 'fun' stuff.
and messing with other things at home
ooh... 1000HP? What does that run?
big motors ;-)
mm... yeah. :)
paper mills, big pumps, all kind of stuff
wow. So you're a hard-core EE by day, eh?
yep... power electronics
nifty. I should ask you about my desires to build a VFD sometime.
that's what I do - VFDs.
wow... how perfect. What would you recommend for a series 1 bridgeport?
I haven't worked on one rated less than 200HP in years :-(
Haha... hmm.. ok. I need a bigger mill :)
What do you run EMC on?
I work for Rockwell Automation (Allen Bradley/Reliance Electric), but our small HP drives are kinda pricey, I think the concensus for 1-5HP is Hitachi or some other Eastern models
right now I don't have EMC on any machine
I have a Shoptask 3-in-1 that I want to convert to CNC
just finished converting the Z axis (quill) from rack/pinion with 0.050 backlash, to ballscrew
but like most projects, the conversion is going slowly
yeah... I picked up a Hitachi .. 150? Not sure on the number. I just wish I could interface the VFD easily to the computer. It has a wanky proprietary profibus interface.
Most fun projects do take a lot of time, and seem to go slowly because we're impatiently trying to get to the part where we use what we're making! :)
most drives have wanky proprietary interfaces, but they usually also have inputs for run/stop and 0-10V speed reference
I hate proprietary stuff
yes, that's true. But it'd be easy to plug a serial port into the thing and write emc software to talk to it. it's harder to break everything out to analog current loops and a bazillion inputs that need to be opto-isolated.
I trashpicked a big pile of AllenBradley 1394 AC servo stuff from work, but the proprietary interfaces make it almost useless
(Easy, I maen, if it weren't proprietary.)
But you work there... surely you can get a compatible driver to talk to it, right?
nope - it's a big company
the system is modular - I think I can reverse engineer and use the axis modules (power sections) and replace the control part
or maybe I'll just sell 'em on eBay ;-)
so many projects, so little time
this evening I was troubleshooting a Tek instrument that was being scrapped
like a big digital storage oscilloscope?
nope - tho I've got a DSO here
A TVC-501 time to voltage converter
it's really nice for measuring jitter, or PWM signals, or step pulse trains
(assuming I can repair it)
It's amazing what a big company scraps
I just unloaded a beautiful 60" tall 19" rack cabinet
Yes, it is. But, in reality, it may not be worth the big company's time. (It's totally worth free time for us individuals, though!)
from a DEC Alpha server
I didn't want the server - too strange - but the rack is really nice
Yeah, I picked up 4 rack cabinets like what you're describing. Make great shelves in the garage, and are on BIG wheels to roll stuff around.
this one even has two full extension ball bearing shelves, so you can pull a system completely outside the cabinet to work on it
I've gotta re-arrange the piles in the basement so I can bring the rack inside
yes, those are nice. We threw away a bunch of those roller bearing glides at a company I worked at back in '99. Wish I would have saved those!
then maybe I'll finally have some bench space
ooh... a basement. That's something I wish I had out here.
the problem with basements is getting the heavy stuff and and out
mine's too small anyway
(better than none I guess)
where do you have your machine(s)?
yes. I want a basement on a hill with a garage door on the hillside.
My tools are all in the garage. a 2 car garage that sometimes has a car in it is just not nearly big enough for all the toys.
I have a Van Norman #12 mill and a SouthBend 13" lathe in the garage - too heavy to get inside
It's hard to beat a basement for large raw concrete space!
but that means I rarely use them in the winter, and fight a constant battle against rust
I have a Logan 12" and a Jet ... couldn't even tell you what... next to my bridgeport in the garage. Not enough space to get around them all.
my mill: http://home.att.net/~JEKasunich/vannorman/VN_Home.htm
I also have an ancient #3 grinder. I don't even know how to use it. I just couldn't hardly see it go to scrap, so I saved it... but... now I really would love the space back!
my bench: http://home.att.net/~JMKasunich/Pics/bench.jpg
ooh... horizontal and vertical...
I hope to move the stack of computers on the right into the rack
And rack mounted cases...
all from the dumpster
the top one is the compile farm - 8 individual PCs in one box
It is amazing what you can find dumpster diving.
(only 200MHz tho)
the middle one is 600MHz P3
I have another one similar to that, 500MHz P3, still setting on the floor
whoa... nice. I that some sort of early blade system? (with 8 pc's?)
ISA backplane, 16 slots, split into 8 two slot chunks
one blade goes in the left slot of the pair
any ISA card in the right slot
each blade has video, SCSI, IDE, and ethernet
the rack contains a built in 8 way KVM switch which also muxes the 3.5" floppy
So you have 8 drives stuffed in there too?
and there is space for 8 hard disks
(And scsi drives at that?)
some are scsi, some are IDE
oh... you said ide too.. yah..
the original drives were 2G scsi
a build farm sounds like a perfect use for 'em...
yep... not much else that makes sense
I can't wait to get that stack off the bench
(at one time it was worse - I had a laserjet II on top!
just barely fit under the flue pipe from the waterheader
I've got a room full of that sort of stuff. I have a pile of old laptops that I need to do something with at the moment...
I'm a terrible techno-packrat
me too. Who knows when that stuff could come in handy for some sort of project?!
Hate to say hello and goodbye right away, but I think I'm gonna find smoe dinner..
the problem is that in order to have the thing you need when you need it, you gotta have an enormous pile of stuff, and at least some kind of system so you can find things
for every one you use, there are 10 or 100 that you don't... but if you don't have that many, you won't have the one you need
The other thing is that finding things in the junk, you don't get to choose what or when things show up... You have to have a stockpile to queue interesting things up into...
like that rack... I've been wanting one for a couple years
last week the server appeared in the loading dock with a "scrap" sign on it, so I swooped down and nabbed it
Exactly. I did the same thing with the racks I got. Gotta jump when they're available.
same with the 1394 servo stuff... I have no idea when or if I'll use it, but it was too good to pass up
sounds interesting. firewire based servos?
my employers are assholes!
the allenbradley website seems to be inaccessible from my linux box... works great from winblows
I was gonna send you a URL for the system, with a couple pics and such
hmm. oh well. I have no winblows box anyhoo. :)
I gotta takeoff and do the dinner thing. I may stop back a bit later and see who's about. g'night jmkasunich, and all...
goodnight - I'll be asleep when you get back
a little ohming out of this instrument, then bed for me
CIA-temp688 is now known as CIA-12
I asked for a example on how to use c++ togther with the plc's I am working with
I got a 17mb example... of a realtime kernel..
alex_joni is now known as alex_joni_
oohh.. robin is also around ;)
hi alex, any sight of paul lately?
I think he crossed the pool ;)
ocean actually ;)
alex_joni: somthing hillarious happened to me today
you got yourself a nice oil-bath from the hydraulics
alex_joni: I talked to the manufacturer of the plc's i work with and asked for a example of how to use c++ togther with them ;)
I got a mail with a 17mb example of a RTOS..
anything usefull in there?
yeah probably I havent had time to look at it too much
is it proprietary?
I would have asked you to mail me a copy... but in that case .. better not
it's of no real use.. though
I am just curious on how to use c++ togther with the plc's..
the priority stuff is somthing I can make up for myself if I need it :)
what interface do you have?
for conecting to the plc?
although just can and rs232 on this one
rs232 would be the easiest way
they'll talk with pretty much anything :)
but you need a command set
how to talk to it
already written that :)
then what's missing?
* alex_joni prods robin_sz
oh, I was curious since I am thinking about implementing my filters in c++ since it'd be more efficient..
you mean the stuff you program into the PLC?
that is what you want to code in c++ ?
parts of it..
* alex_joni needs your experience ;)
adaptive filters to ignore pressure spikes from real stuff..
what do you think of : http://www.rollon.com/english/products/uniline.htm
with real stuff I mean legetimate pressure and not just pulses from the huydralic system..
alex_joni: its a linear slide :)
I know that...
it has a belt drive inside
you can connect the motor to either end
I plan to use a G340 + DCmotor + encoder (on the other end)
how do you plan to set the torch height?
on the X axis (2 slides with a connection between them)
at first no, maybe later with an z-axis (only for height controll from plasma-voltage)
not actually connected to the controller
right ... well .. you have 2 choices
1) some sort of Z axis
2) some sort of plate rider (rolling ball bearing)
or some sort of manual adjustment ...
to set the height for the complete sheet...
I suspect it is not stable enough for 2 .. the twist and torsion will make it innacurate as the balls bounce around the shhet
alex_joni: that wont work
first find flat sheet
I did a lot of plasma cutting without changing height
over a big sheet?
usually the precision needed on the parts is not that high
ive seen sheets that big with 20mm of bend in em
who sells those?
well anyway ..
I just wanted your opinion on these linear stuff (rollon)
what impression do they give you
it doesnt look like it has enough torsional stiffness to hold a torch height controller (z) or support the strains of a plate rider
the motion part is OK ... its just the stiffness bit
apart from that .. its fine
* anonimasu yawns
well I think 2 x A55-3000 mm and 1 x E75-2000 (for Y-axis) E75 is a bit stiffer
[13:51:22] <alex_joni> http://www.rollon.com/english/catalogs/4141E-B/zip/41-41E-Uniline.zip
getting office work done...about to start the machine
darn connection ;)
* anonimasu yawns even more
maybe I should be moving a bit..
I'll fall asleep at the keyb if I dont take a walk
* alex_joni_ agrees
I need my coke
I've just had a pepsi max
didn't drink any today
yuck.. pepsi ;)
but it's too weak to make a difference..
* alex_joni_ is anti-pepsi
2l coke / day still do the trick for me
well it's better then the other orange stuff..
no coffee though
I just drink 1�l
my doctor said it's healthy to drink a lot of fluids :}
hi alex_joni_ i am just starting with rtai
not now maybe later :-)
if you need help you can probably find it here ;)
alex_joni_ is now known as alex_joni
yep , thatz the way i like it
robin_z is now known as robin_sz
* anonimasu sighs
can't decide to go machine stuff, or have a coffee.
that's it... coffee wins.
I tried to machine a gearknob..
roughing the part took 10 minutes :/
out of what?
turbocnc wouldnt go any faster..
afaik there's no motion planner..
so it dosent interpolate motion
it stops the axis:es each direction change..
so it's slow as fck..
why do you use it?
even when running at 1000mm/min
because emc and I had a fight last week..
sounds like you lost
cradek: Yeah hard..
are you going to kiss and make up soon?
cradek: emc dosent give me pulses when running my axis:es..
just one way
didn't paul say that's because he messed up the parallel port driver?
if so, just download emc1 from cvs
it works perfectly
did he find the bug..
I'll reinstall it tomorrow..
but I might change to a 600mhz box instead
it should be able to give me a bit more speed..
does emc stop when milling like that=
I NEED EMC!
the old planner blends lines
the new planner blends lines and arcs both
you could try both
* anonimasu longs for a program with good lookahead
you want emc/segmentqueue then
I'll install it again tomorrow..
it works *great*
I cant live with this crap anymore..
the part is a 3d surface..
but so ther's lots of direction changes..
want to see it?
a gearknob :
hold on a bit
anonimasu, how'd you design the part?
[19:37:47] <anonimasu> http://www.bojn.net/~an0n/knob.jpg
like in what program did you design the knob? What did you use to make the gcode?
visualmill + solidworks
I currently do this... myself... draw the program in autocad, and manually do the gcode... but I am only doing it for 2d (lathe) work.
I coded some g-code but when you can use a cam program it's hillarious :)
why's that? I've tinkered with mastercam.
the part took maybe 20 minutes to cad and less to generate the toolpaths..
yeah, cause it's automated.
isnt that one of the points of having a cnc ?
I went back to that local store, to settle my account. :) I didn't want to wait longer to pay it off... they forgot about my account already... and it was less than 24hrs. :)
it was only $10... but it's the principal. :)
they don't take advantage over me... and I don't want to over them. [And plus I needed more socket head cap screws]
stupid metal supplier doesn't have 3/8" dia 6061 round bars in stock... I'm gonna have to turn down what I have to 3/8... :(
my metal supplier dosent have any alu..
or well the one we use at work..
anonimasu, that SUCKS.
so I have a hard time to get alu
that really sucks.
one of the largest metal suppliers in sweden..
my supplier has about a 3ft by 12ft shelf, by 4 ft deep, full of alumnium off cuts... I browse that area often. :)
I bought off a local shop that does milling earlier
My metal supplier supplies bombardier (makers of jets, skidoos, turbo prop planes)
but there's a new retard that bought the company off the old guy..
and he's stupid enough to not have any spare metal in stock..
what are your prices like?
just allocated for projects stuff..
3/8" dia, 6061, 6ft. $5.00 CDN, taxes in.
hm, that sounds cheaper..
well, that was what I was quoted.
but I cant remember as I bought it at the company I work for..
I need some very thick alu
1Euro = 1.59383CDN.
Damn... Euro is expensive.
for making a supercharger casing..
2" diameter is nothing.
Iv'e got some 4" dia stuff here. :)
2.5" that's only an inch.
err. 2.54cm = 1"
but 2.5 would be ok aswell..
the dimmensions not critical as it is to be milled down lots..
but well.. getting the material.. is hard..
that could be a little costly. i'm guess it would cost me, around $50CDN.
hm, for 40x40x2.5?
getting the material isn't that hard... it's the shipping.
or 5 which?
2ft x 2ft x 1" = $475USD + shipping from www.onlinemetals.com
damn they are freak'n expensive.
I should call up my supplier and ask.
ARGH.. that's super expensive..
my supplier is like 1/2 their costs.
I'll get a supplier at work at monday..
hmm... their 3/8" 6061 is cheaper...
not after shipping. :(
Man... I wished titanium were cheaper for me to toy with.
I wish that too
what's your price?
the stuff I've got... I got for $25/ft for 1"dia Ti 6al4v or something like that.
that's not that expensive..
I got 3 ft worth of it... plus I got some that's 1.5" dia.
No, but I look at the other places... and I'm like WOW.
holy smokes that's expensive.
it's like $75/ft from onlinemetals.
I'd love to have some 3/8" to make the shafts for the supercharger in..
it's 3pm now... I have yet to accomplish something productive.
anonimasu? ebay? :)
I am in sweden
the most expensive thing will be buying ceramic ball bearings..
so is that +1GMT or +2?
omg. ceramic ball bearings that go high rpms, cost an arm.
some rep from FAG (the bearing manufacturer) said it'd be like $10K CDN... it was insane.
more like $100
I think I'm now going to need a bottoming #6-32 tap. :/ aRGh.
yeah, the FAG guy knew nothing... he was talking shit.
but I'm just quoting him.
try skf instead
yeah, I like SKF. They have a local manufacturing plant.
they are super precise :9
BB-105C2 Ceramic 5x10mm Bearing
yeah, but I spent #30 on two bearings.
I can type, really.
I need speeds over 30000rpm
I actually need two or three bearings to make a spindle... that go around that speed. 30K+ RPM
more like 120000at max
the spindle I want is only rated for 30K. and costs $180USD. :(
that's cheap :9
spindle was mean to be chuck.
I'm mkaing the spindle.
still cheap :)
each of my servos was around 600~
small galil ones..
[20:06:04] <A-L-P-H-A> http://www.mcmaster.com/itm/find.asp?searchstring=2823A32&sesnextrep=501333187300961&tab=find&FastTrack=false
tell me if that link works.
if not it's part number: 2823A32 on www.mcmaster.com
you really should get a real mill chuck..
the endmills I'm using are 3mm dia.
endmill shafts that is.
tiny stuff :)
I can see why you need that kind of speed
yes. I have another spindle that does 5K already.
that uses W20 collets.
W20, swiss made Schuablin standard.
nice stuff, expensive though. and doesn't go at the rpm I require. :(
I dont know if I could use rollerskate bearings..
Abec 5 and 7 yeah I could.
[20:12:39] <anonimasu> http://www.rceracing.com/lowfriccerbe.html
the stuff I'm looking at is abec 9... and I'm guessing the price is going to be costly... but probably less than < $100.
this spindle hasn't even been started yet... as I don't have the bearings.
I need the bearings first.
so I can maching the spindle, and housing... no point in doing any of it before I get the parts I require.
I think the abec7 bearings that goes to 41000rpm will handle double that without problems..
but well I might talk to skf about bearings..
but it'll cost a arm
haha... abec 7 are less than $8USD each.
on mcmaster.com :)
I was looking at abec 5
I hate the prices on stuff..
I could actually have a oil bearing..
but well, machining the pices isnt somthing I could do..
the ra that's needed are way what I can produce
I would need a new lathe and a toolpost grinder 8 diamond wheel..
and all that stuff costs more then buying good bearings :9
whats up ya'll
Made 6 identical lengthed spacers
and that took me like 40 minutes. :(
I'm so slow.
I only need 4... but this is just incase the tap breaks within the part. [always scared of that.
talking bearings hu?
I have a few bearoig books around here
Abec 5 all cost aroun $10USD. Abec 7... cost around $120USD
Same... I've got Forenten or something... SKF, and NTN [cd-rom]
hm, does skf list prices`?
I dont think they do
how fast you gonna whirl them about?
no. no prices.
my application. max I think I'm gonna be going is 15K.
unless I'm grinding, which I will than be going at atleast 30K.
ill be right back
somwhere around there..
abec 5 will be good enough for my application. :)
why not just buy a turbo?
a-l-p-h-a: a supercharger costs 4000$
and I have a turbo housing and a good impeller..
A-L-P-H-A : check or watch ebay for air grinding spindles
a-l-p-h-a: the same reason your not buying a spindle..
anonimasu, COST... and application.
that way you can save lots on your main MILLING spindle
The spindles I see, are +$5K.
thats cause they are using 3k worth of bearings in 6 bearings
they are not just using a abec 7 bearing thats off the shelf
well... I don't need continuous duty though either... and I don't mind replacing the bearings, say after 15 hours of use. 15 hours of use could probably give me ALOT of parts.
all matched sets, they even come with a special grease its all wierd
I see two air spindle bearings...
I don't think I need air... which means I gotta run lines from my garage to my basement workshop, which I don't want to do.
well an air grinding spindle for use if you plan on using grinding wheels
yeah... I could deal with that. I do also have a cheap cheap dremel clone.
but my application is just do this: use a 1/3 or a 1/4HP motor, spinning at 1750, make a pully and use some polyrope.
Hmm... wow. I would need a 6" pully @ 2000rpm to drive a 1" pully at 12000rpm. Lets see if I make an addition pullyset what would happen.
Well. if I use 3 pulleys.
I wonder how much speed regular bearings will take..
3" => 1" connected to 3" => 1" it would do the job as well.
abec 5? 48K rpm.
for an 8mm bore
hm abec7 ?
abec 7, 12mm bore, 60rpm.
hm, I'd still need better bearings :/
if you get bigger, the speed drops conderably. Page 1021 on www.mcmaster.com
smaller would be even better :9
well... the Abec5 bearing I see, that's 0.0469" Bore... is rated for 120,000rpm.
but it's life would be short I would think.
I need even better bearings..
* anonimasu starts sawing an arm off
don't for a kidney as well.
More machining. :) hehe. dang. it never stops. :) hehe
I cant imagine what im gonna do for a spindle
as far as bearings go, its gonna cost plenty im sure of that much
thats what I get for wanting to copy a full size machine into miniture
gezr? if you don't need to drill with it... it's easy. :) And also ifyou want a drawbar or not.
what kinda collet system do you want to use?
im going to intergrate a special tool system into the main spindle
that way I dont have to worry about grinding say an r8 taper or anything fancy
and I will be drilling, milling, all sorts of stuff
2 set of 3 angular contact bearing sets
im hopping for 8k max rpm
I tend to be brutal with machining, so I need power
I'd like a 5hp motor on my mill. :)
I'm happy with 1hp on my lathe.
does what I need it to do.
oh, I started to be a little more agressive on my lathe.
I dont need more then a horse or 2
I'm making chips, not ribbins. :)
A-L-P-H-A : if you have machining questions I can help you with that stuff
well... sometimes I get chips, sometimes I get 2" ribbins
I had in order to break the chip on a part earlier this week jack the feed rate up to .028"/rev
now the chip was still about 8 inches long but 1/2" curl and was breeaking
this is at work and not on a small machine
the doc was only .060
I just don't like buying carbide inserts... they're expensive to me... considering I can't order them locally... well I can... but it's even MORE expensive.
if you keep your machine tight and take care of it, oil and stuff, its gonna last
there is a crabide guy, crap I cant remember its name now
everything is inexpensive
I buy my carbide inserts from www.carbidedepot.com
im gonna go with a w style insert
they FINALLY ship to Canada now.
They did, stopped, and now started again.
such a pain.
I had to ship to my sister in Ithica new york.. and wait till she comes back from school to get my carbides.
do you make sure your tools are on center height?
I make sure.
are you using a positive geomerty type insert?
I have an multpoint turret system... or was it called a multiplex?
I dunno now... it's just nice, and my machining friends are jealous of it. :)
hahah, cool, positive may not break a chip as well, but it will take less hp to use
while a negative insert will be stronger and more readly break a chip, with the cost of really straining your machine
and oh, keep some hss bits handy, youll find at times, they will provide you with a better finish if you grind them properly
cause they can be run at a much lower speed so the surface footage needed is way down there
I have lots of HSS... I just stink at grinding. But I had to for that keyway I needed to carve out.
there are some simple rules to follow for it, you have a dressing ting for your grinding wheel right?
somewhere... [I just don't use it]
you need to keep your grinding wheel clean :)
I think I know where it is... I need a need rough wheel anywyas... I put a grove into it.
yeah, just practice with stuff
unlike you, I dont have much stock, and what I do have, is stuff like 4140 and 4340, all over 30rc
I dont like spending money I think is my main problem
[21:51:18] <A-L-P-H-A> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=57028&item=3867566320&rd=1
<-- something I'd like... but out of my budget.
I cant really click and go on this console, whats that?
the stock I got is sitting flat on a shelf above my workbench. I realize I have lots of 3/8 to 1" of brass.
it's an High Speed Grinding Spindle for 45000 rpm.
oh yeah, how much is it?
With a mounting arm.
right now $530USD :(
that is indeed painfull
but a bargan if you think about it
just wait and watch, youll find one for 100 bucks or so
thats much less then a set of bearings
for a grinding type spindle
I may play machinist tonight myself and finish my x-y table up
my objective isn't grinding... my objective is to have highspeed milling spindle for light applications. Milling Titanium, with cutter dias of .5mm up to 1mm. At 12K rpm.
hey, you have gear cutters?
Yup. I got gear cutters.
do you know what the hole diameter is?
I can find out.
Ide gladly buy them off you or any arbor type mounted tooling you dont want
or cant use
right now I have a 7/8" arbor, and a 1" im in the process of making
I believe they are 8mm.
I got 0.315" on the bore
oh, little bittie ones?
this is a jewellers lathe. :)
that is soo cool
how is the indexer comming?
spindle is made... bracket mocked up in cardboard. Stock all bought.
Motor mounts / journals.
drill and tap the spiggot for set screws.
drill and tap the motor coupling for set screws.
so I hope to be complete by the end of the weekend. :)
the only time consuming part is the bracket.
the rest could be done in a few hours if I concentrated.
never ask a blonde whats written on the side of an orange juice carton.
I need a tea or another coffee... cold.
picnet, why? hehe.
I'll install emc at the faster computer tomorrow
the estimated time for my job was 56 minutes
for some 3d finishing..
I like blonde jokes... I'm Asian... so I have black hair. But I have a birthmark, which is a blond patch. :)
anonimasu, so if your making this out of foam? Are you casting it? or what's up?
no I am milling it out of foam..
for playing around
and I dont want to spend 50 minutes when my machine if milling somthing with very large stepover.. :
because the controller dosent interpolate motion
a-l-p-h-a: it's that gearknob..
it should take like 5 minutes in foam..
your using foam as somethign safe to machine?
wax is neat too
"markiso" in swedish..
it's isolation foam..
stiff and nice..
2 large plates was like $25
ive also used it, tends to break into tiny pieces and fly around the machine at high rpm, but vacuum can take care of that - > explosive particle cloud?
I dont think it's that a problem :)
but that's probably right..
but well, alu-chips are dangerous too
I paid $0, do you need clean sheets of it, or just test stuff? - easy to pickup from someone building a house...
I bought clean sheets..
it was easier then to look around for somone willing to give me
I dont care for the price that much..
i know that well :)
I wish I could get somthing like wax
but it's even harder for me to source then aluminium
can you machine that kind of wax?
freeze it first
or how you spell it
I'd like real prototype wax
are you just testing ? blue core is probably good enough, or some machinable plastic brb..
yeah, that blue stuff machines nicely..
but I'd like to make some molds later on..
but I could machine them out of that blue stuff and just use some thin plastic to cover it while making a fibreglass mold off it..
that works too
as long as it machines nicely, and get a decent surface finish...
gezr, the other night, when I was maching some al 6061. I was using the DOC as the radius of the carbide insert I was using. It was not chipping. Still strings that were as long as whatever. I was going at maybe 300mm/min as well. I think my DOC was 0.4mm
aluminum can be stringy and easly chipping, its a play with thing
mind you... going at 300mm/min at 0.4mmDOC was fun... so fast. :) heh.
turning alu is funny
it could be that you didnt have enough doc to cause it to break on its self, or think of it as if you need to stress the metal in the chip ya know
[22:14:27] <A-L-P-H-A> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=92086&item=3867837778&rd=1
wow... this is nice... but of absolutely no use to me. it's an atlas 10 spindle pully replacement
I wish I had a cnc lathe
yeah ive seen that, that would fit on my lathe
well soon maybe
I use a timing belt pully on mine. Zero slippage. :)
[22:18:02] <A-L-P-H-A> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=25295&item=3866051983&rd=1
<-- wow. Right Angel Milling spindle. Cheap for now. :)
300mm/min isnt very fast, what rpm were you cutting the aly at?
2,000 rpm I think.
somewhere along that line... I didn't run the tach to check.
cutter was what dia?
picnet, the turning tool is a 55deg diamond, with a radius point of 1/64" I believe.
ah lathe, not mill?
i best vanish its late here, have fun.
so easy to make.
can't believe this guy did that. hehe
but it won't have the power to mill I think.
now if I had 2 of thoose bearings :)
or 4 ;)
real power :)
I doubt you can mill with it..
I can believe engrave... but not mill.
yeah milling takes lots of hp..
My requirements: 1IPM feedrate. Cutting diamater of 0.5mm to 1mm, DOC is 0.5mm. RPM at 12K.
does ti take that much speed?
* anonimasu havent seen anything about milling ti..
just that it's tricky
I was told those specs by the end mill manufacturer. CET is the manufacturer.
I'd give a url, but I don't remember it.
I have their catalogue somewhere
dosent matter that much
[22:29:43] <A-L-P-H-A> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=58254&item=3854378718
<-- not this is something of interest to me.
all I'd need is a nice tach to figure out my RPMs.
I am so tempted to make an RPM reader... I have the schematics and everything, just not all the components.
a 5 digit LED/LCD counter... that'd be nice.
use an ATMEL chip to do my dirty work. :)
hmm... I just figured out how to do it.
atmels ar nice
do it on a 10second or 5 second count. For 5 seconds, count how many pulses were triggered. report that on the LCD/LED. Repeat.
that's way too slow
it'd be accurate enough.
I could do it for a second... bit I couldn't get any readings lower than 60rpm. :)
* anonimasu will be using a 0.5 sec as interval
with 2 pulses per rev
but that's for my other project
but I need emc running so I can cut some alu and measure,,
[22:36:33] <A-L-P-H-A> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=58254&item=3854378718
<-- I like this design, it's simple.
just wonder if it's beefy enough the motor.
I need to rest for a bit
hmm... maybe I'll use a planetary gear system... [for kicks] for my spindle. hmm...
[22:40:43] <A-L-P-H-A> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=58254&item=3868911769&rd=1
<-- dang this wolfgang guy has a lot of CNC systems to sell.
* alex_joni finally set up his internet connection at home..
now I can browse wirelessly with my laptop
even in bed .. :D
A-L-P-H-A: you can multiply the value read by the counter
I know. :)
or do some kind of average (to increase performance of the display)
that's what I would do..
grap an ATMEL with gcc
in 5 mins you're done
my problem isn't the ATMEL to LCD display functions.
I haven't played with atmels much at all.
though I do have 20 or so of them of the 90s2313
it's basic c-programming
90s2313 - 10mHz.
you just output to one pin (or port)
say you have an BCD-display
alex_joni, you play with atmels a lot?
I played with some ATMega128 ;)
those are a little bigger
128 kB flash
cool... well... I just need to figure out how to make make the chip communicated with the LCD/LED screen.
yeah.... but how big will my app be? TINY. :)
LCD or LED?
Either... isn't the logic the same?
I know.. that's why a 90s2313 is the best
not really the same logic
if you have LCD, it probably has an controller on board
and you basicly send text to the LCD
where write is the function to output to the LCD
you can find a lot of source code for most LCD controllers
try AVRLib (it has some controllers)
so I'd need a secondary controller, that is if the LCD/LED doesn't already have a controller.
so I'd need to pins to the controller to get it down.
Atmel -> controller -> LCD/LED
if the LCD/LED doesn't have a controller you need to controll it
* alex_joni haven't seen an LCD without controller... ;)
but a lot of BCD-display (those 7-segments like in electronic watches)
those don't have controllers
but they are easy to use
well... I'm looking for something on the cheap. :) heh... I'll worry about the TACH at a later time. :)
use a 8-bit register (say 74LS245) and connect the outputs to the BCD
I have an tach from www.dakeng.com built already. so I'm good for now.
now you only need to load the value for the BCD to output into the 245
one 245 for each BCD you need
4 digits-> 4 x 245
how optimized is it?
I liked doing it by hand... the AVRASM. but C would be so much faster. :) heh
a lot faster
and.. you have gdb ;)
I use a JTAG programmer
Hmm... I'd need examples on how to poll a crystal, to get a proper timming/sync.
well.. you don't need to poll the crystal
you know how fast it is
and based on that you can calculate a timer-function
say.. if you have a 10MHz osc
The crystal forces the clock cycles on the chip though.
crystals lend themselves to interupts ...
say you program a timer
yeah, so I guess I don't need to do anything with the crystal other than hook it up.
to count x clock cycles
yeah, a timer .. you could poll a timer
and then generate an interupt
* alex_joni thinks that atmel might even have an counter
connect the signal from the spindle to the counter
and you need a big while
* robin_sz saw a nice up board this week
check the value of the counter
alex_joni, hang on a sec... :) I'm writing down some thoughts.
no ... a blackfin DSP
it runs linux ..
robin: disregard that ;)
using a DSP core ... weird huh
* alex_joni thought it's smthg else
linux on a DSP...
a lot of ideas come alive :D
you get a nice baord, with various IO, serial, parelallel, some sort of notwork ..
* alex_joni had acces to a StarCore DSP
that's a big DSP
[23:04:08] <robin_sz> http://uk.farnell.com/jsp/endecaSearch/partDetail.jsp?N=401&SKU=8546185
that's the logic I'm thinking of.
TT = TTL
not good... back is twiching.
robin: this SC I'm talking about has 4 DSP cores
running at 250 MHz each ;)
we have an evaluation board at the local college
this is a single 600mhz core I think
with Gigabit / Gigafibre
they do cores to 756mhz .. thats quick enough :)
I hope it's passive cooled
and cheap too .. 95 GBP for that development board ..
you don't get a SBC for 100 quid
and if you say it's got ethernet...
well. .. details are sketchy :)
I see that
[23:13:27] <robin_sz> http://blackfin.uclinux.org/
I am already reading there
hmm... I guess I'm gonna have to hash through this code to learn it. :)
a-l-p-h-a: can't get that page to load
nah. I'll wait till I need to. dang. this is so much on my plate.
[23:16:46] <robin_sz> http://www.analog.com/en/epHSProd/0%2C%2CBF533-STAMP%2C00.html
yeah, it has ethernet :) and LOT more
that's the logic anyways. :)
issue I see that I'll be having is, well... the output will be flashing alot, cause the RPM may not be exact stable.
I kinda agree
but.. you might get into problems
it would be better to count an exact time..
say you do a lot of nops (10.000.000)
that's exactly 1 second @ 10 MHz
I could average the RPM pulse by a stack... and average that stack.
alex_joni: if you conut 1000000 nops you dont know how long that takes .. interrupts culd have happened
I don't know how to do a timer that is like that... in asm, I would have to manually figure out the # of clock cycles for each comment, and compute that.
try gcc ;)
make a big for
you can be +/- 1% accurate
that isn't that important
robin_sz: " a networked oscilloscope "
this sounds nice
project with a blackfin
* robin_sz nods
thye have one thing very right ...
if you couldnt make a 600mhz DSP into a nice pulse gen ...
I'm wondering what would be better, my method of monitoring the difference in ticks? and display an average... display every X seconds? or your method of count ticks?
A-L-P-H-A: depends on the RPM
Your way would be good if the RPM is higher than say 120RPM... but my way is good for all rpms.
at low rpm, time each rev
at 10000rpm, count revs per time period
hmm... good idea.
just put the logic in there.
you dont want interrupts at 10khz ....
start it off... count... if pulses are greater than see 50 pulses per second... then go secondary route (my route)
50 pulses per second = 3000rpm.
this is to get spindle speed on a lathe?
no, highspeed spindle that will be used on the lathe.
for milling titanium.
and you need exact control of the rpm for?
no, I don't need exact... I need ballpark.
12K rpm is my target.
i had some beer, a nice curry, and now a sit down with a cup of tes
mmm ./. sleepy :)
* alex_joni is hungry
mmmm ... currry
had a chicken roti yesterday. :)
hit the spot really nice.
* alex_joni plans on making some sushi tomorrow
this was matta paneer
I am supposed to be at a friends house for ribs tonight... but I didn't want to drive to her house.
and it's tooo cold to do anything.
a her, and food, namely ribs and it being cold
* alex_joni thinks of a fireplace...
and a LOT of possibilities :D
she's a friend... we had some chemistry... but she's HER... and I'm Me... I know her quirks too well. we're close friends. that's all.
A-L-P-H-A : see ya tommrow pal
Now her sister is really really cute... but she gets annoyed way too easily. I'm actually affraid of her...
All 5'2" of her...
robin: wanna hear the latest crap I thought off?
k, off to machine some spacers... well. drill and tap them. shouldn't take that long.
drill and tap
she has beer too?
[23:36:02] <robin_sz> http://www.analog.com/UploadedFiles/Technical_Articles/418382427uClinuxWhiteWP_WEB.pdf
alex_joni: go on ... shoot.
I have an PDA I don't use...
I thought I could make a nice pendant for EMC out of it
I plan to buy a CF-WLAN card
whats it run?
but it's Win-CE unfortunately
Win-CE-2002 I think
plenty of support for that
can't find a page on the net to scrap that
and put linux on it..
seems they modified the update process so you can't do that
with 2000 you could still boot off a CF
seel it and get a zaurus or somesuch
not anymore :(
who'd want to buy it?
it's an Casio E-125
i feel strange about what I want to do or not do tonight/this weekend
not much ebay activity around here ;)
i want to ... RELAX
* alex_joni plans on coding a little
I plan on meeeting up with an U18 girls netball team in a pool
* alex_joni grabs a bite...
like so many things though ...
it wont happen
* alex_joni is back
I really need to get broadband...
this dial-up really sux ;)