theorb is now known as theorbtwo
Just this once .. here's the log: http://www.linuxcnc.org/irc/irc.freenode.net:6667/emc/2010-09-12.txt
so... how do you ground the computer / mesa hardware? like the 7i33? I have everthing grounded back to the bus bar - but I really have not run anything to the computer yet. the case is bolted to the pannel..
the vfd is tracking within 5 rpm from about 50rpm to 4000rpm. (after setting the scaling and biasing of the vfd)
Might still be worth making it closed-loop to deal with load.
andypugh: yes - in the future.
There will be an encoder on the spindle motor
Ah, yes, closed-loop is tricky with no spindle speed feedback :-)
skunkworks: put one of those moving picture things on it
skunkworks: one of these http://www.fi.edu/learn/sci-tech/motion-pictures/motion-pictures.php?cts=photography
skunkworks: I think you should do the leap frog =)
WooT! Got my little QRD1114 working on my router... registers speeds up to over 35k RPM..
That's it? Call me when you get 35P RPM
Call me when you get 35,000,000,000,000,000 RPM
Is there a way to use a game pad for jog control?
Connor2 is now known as Connor_CNC
I'm pretty sure somebody has done that
isn't it on the wiki?
[02:41:35] <L84Supper> http://vimeo.com/11555627
[02:42:23] <L84Supper> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Simple_Remote_Pendant
short answer : yes :)
Cool, got it working!
L84Supper: i believe that show CMTS is on every year.
it is a decent size, though shrinking due to the fact that large companies do not exist in N.America any more... no one to try and sell expensive equipment to!
elmo40: manufacturing week used to combine about 5 trade shows and fill all of McCormick Place in Chicago
elmo40: now all the big shows are in Asia except for Cebit in Germany every year
cebit is dead boring :)
question guys, the input's for parallel port.. they toggle when switched to ground.. would inverting them work if they switch to +5v ?
that depends what kind of pullups and downs you are using
Dunno.. It's built into the driver board for 10,11,12,13
[06:09:37] <L84Supper> http://www.beyondlogic.org/spp/parallel.pdf http://www.beyondlogic.org/spp/parallel.htm
check this schematic: https://m21.hyte.de/wiki/JogBox
currently, if I ground out the pins, the trigger (in the parport tester in emc)
it has switches to ground, and uses one output and one resistor per input as pullups
sounds like you already got some pullups somewhere
try pulling a line to ground with, lets say 4.7kohm
if it then try 10k.
yea. I think the board does.. it also uses optocouplers.. (2 of which are blown_
pull to ground, then have my circuit toggle 5v to bring it back up ?
if its reliable on 4.7k, but not 10k, use the 4.7 (means the pullups you already have in place are around 10k)
eh. how does the output of the circuit you want to connect look like? transistors?
let me find a schem.. one sec
[06:14:44] <L84Supper> http://www.epanorama.net/circuits/parallel_output.html#realworld
[06:15:43] <Connor> http://www.flickr.com/photos/jmillerid/414926843/in/set-72157594579056599/
never mind the atmega part..
just look at the opto..
don't short totem type outputs to ground or 5V
Connor and what of that circuit do you want to send into emc?
just trying to build a limit/home switch using the IR Opto.
so you got an optocoupler which gives you +5V or 'floating' output?
checking that now.
the one in the schem looks like you could directly connect it to the parport
what's the part number of the optocoupler?
meaning: using the line running to pin23 of the avr and connect it to the parport instead.
qrd1114 (reflective) or EE-SV3-B (INTERPUT
inverting an input line doesnt change anything on the electrical side. its just swapping the behaviour of active and false
Both work the same way.
okay. Well.. currently, the controller I have must be pulling those pins HIGH.
and this circuit "floats" or "high"
so.. I need to change it some how to pull low.
then probe what resistor is enough to make it 'low' and use one with a bit less resistance as pulldown
were would that go in the circuit?
[06:23:23] <L84Supper> http://www.fairchildsemi.com/ds/QR/QRD1114.pdf
means: if 22k are enough to make it 'low' try 47kk. at some point (when both resistors, the pullup, and the pulldown are same sized, it will behave liek floating)
or just use 4.7kohm of pulldown and see if it works.
typical pullups are between 10 and 100kohm. you need a pulldown which has less resistance, to make a sure low.
still it has to be big enough not to generate a short or burn out one of the controlling transitors (or your optocoupler)
4.7kohm will be right in the middle of that.
use an inverter
I can't tell how this board is setup...
what baord is this?
one from ebay, 4 axis all in one.
[06:33:09] <Connor> http://cgi.ebay.com/4-Axis-NEMA-23-Stepper-Motor-Driver-Controller-CNC-Kit-/260650940286?pt=LH_DefaultDomain_0&hash=item3cb001b77e
and, for the life of me, I can't understand why they didn't add pin 15 for input, and why they're using multiple pins (3) for driver enables..
[06:34:22] <Jymmm> http://www.cnczone.com/forums/showthread.php?t=65000
theres all the data sheets for it
that's for the driver.. I'm looking more at the inputs for limits and home.
are you connecting th switches to the paraport, or thru this board?
through this board...because they're opto.. but, if it gets to be too much trouble, I may make a break out to by pass the board.
err. opto isolated
There are only LIMIT switches, not HOME switch connections on the DB9
Pins 1-9 respectively
yea. You can combine them though..
where does it say that?
use X,Y,Z for home, and limits + e stop on the other
I'd return it ASAP
Bad design imo
Connor: Where you at?
US, Knoxville, TN
Have you looked at Geckos?
Switched machines.. No.
[06:48:53] <Jymmm> http://www.geckodrive.com/product.aspx?c=3&i=14469
I love that thing
And Mariss stands behind his products.
root is now known as Guest94914
not really emc specific, but does anyone know some site with free electric guitar plans for cnc? :)
all I found before was crap made from crap and that was sold
frallzor: np =)
cant see how people expect one to pay for crap
some really crappy set of cad-files made from an even crappier drawing
easy, lots of the world buys crap
one would expect thaty ppl that owns cncs knows quality :P
dressed up with the right marketing and lies http://www.usa.denon.com/productdetails/3429.asp
frallzor: Fender, Gibson, etc keep their stuff to themselves, but I'd suspect that they test and calibrate the acoustics and adjust the drawings as needed
that's a lot of testing
This is fscking with me
I have a co-worker that is an audiophile like that. (pure copper cables, the right insulators, nitrogen filled...)
my eyes glaze over when he talks about it.
'breaking in' cables
Les is like that
I must not be refined enough to understand.
Some ppl have an ear for it
Big ass box, and STILL not enough room for everything!!! ARGH
* jthornton made some Toad in the Hole last night for dinner
archivist: would know what that is I suspect'
jthornton: give it up quickly or I'll tell you what that REALLY sounds like!
jthornton: Sounds like a play on a gerbel fetish
very delicious dish actually
wonder where they get the name :?
jthornton: you stuck a toad up your butt then ate it?
Jymmm: get your mind out of the gutter
I aint googling, so give it up
sounds way too much like 2g1c
* jthornton wanders back out to the shop now
weey some code done for a guitar :P
we call them audiophools i ##electronics
oh man. i want! http://www.scope-of-the-art.com/product/rto.html?_language=en
elmo40: according to the EDN article the prices aren't too bad http://www.edn.com/article/510356-Vendors_target_oscilloscope_sweet_spot.php
8k to 20k? not bad, i suppose... never bought a brand spankin' new scope before. didnt know thy were THAT expensive.
how fun it was to mill a "wannabe" guitar body
electric though =)
Thinkubator... is that like a MindPluck? http://thinkubators.com/
who falls for this crap?
anyone know what is used or how to stabilize the voltage from a rotary phase converter?
[17:12:31] <L84Supper> http://www.metalwebnews.com/howto/ph-conv/ph-conv.html
has some basic info
Hey Guys, what kind of wire do you all normally use to hookup your stepper motors?
I've read that one
jthornton: are you needing to better control the voltage, power factor or?
voltage between phases is not balanced as well as I need it for the BP
jthornton: mine's pretty unbalanced and it's never caused me any trouble
the CHNC runs fine on it
I just put any electronics on the real (directly connected to real power) phase
I need to double check that on the BP
all the axis will run at full speed but the spindle alarms out when I go past 2k or so...
seems like everything gives the same alarm lol
so the alarm doesn't tell you anything about what's wrong?
nope, just that you have one
they all say axis failure or something like that even when I ran the coolant pump and it had a short
drive itself doesn't have any lights or anything?
heh sounds like the boss8
one 7 segment led
">AXIS LIMIT" meant something (anything) was wrong - usually nothing to do with limits
a bit newer than the boss 8 I think but by the same people
what drive name and model?
when it alarms the led translates to no power on terminal 65 fix apply 24v to terminal 65 LOL
yea, that is why I was trying to balance the power a bit better to see if that had any effect on the symptom
I'd just make sure the PS that makes that 24 is on the good phase
7 segments should be enough for 128 possible states of alarm, more if you can change the blinking rate as well ; )
yea I'll double check that... now that you mention that it is 22v when running and after an alarm and the drive is off it is 24v
no matter what you do to balance, I bet it'll vary with load - might be a fool's errand
hopefully they designed for better than 24V +/- 2V
if the 24v supply runs off a 240->120 isolator, be sure it's jumpered right
it's surprising that it drops so much
old caps in the regulator?
if a stepper motor is incorrectly wired, is it possible for it to be wired in such a way that it draws way too many amps and blows a driver chip?
do you have personal experience?
a lot of drivers can't handle shorted outputs for instance
im not sure if i had a short
but i know i had the outputs in the wrong order
try tying an output ground that is meant for a winding :) wait for the smoke
anyway other than the spindle issue the 308 is up and running g-code
oh, do you know how long a little giant submersible pump runs when not in water?
about 60 seconds :/
jthornton: how do they measure spindle speed?
with a freq to voltage converter? or is it all digital?
just wondering, nevermind
ok, nap time here anyway
* jthornton wanders off to take a nap now
jthornton. an expensive way would be 2 variacs
hehe and two trained monkeys to turn the knobs while watching a voltmeter
I'd do it once at full load, and call it set :)
Has anyone ever had any luck finding the star-point of a motor and splitting it?
Any way to tell if there even is a star point? I can imagine the motor might be wired 440V delta.
andypugh: if you open the terminal box, what do you see
I see three terminals. Which is why I dismantled the motor earlier.
a lot of motors I have checked have 6 terminals.
Yes, I was disappointed to see only three.
most likely it has a hard wired star-point then
Yes, but I couldn't easily spot it.
can you get a clear look at all parts of the coils?
They are in a motor, wrapped in string and laquer, and I can see several joints.
The new word of the day... Chinesium: A common element that breaks, cracks, or deforms on a consistent basis.
I think you will find that even the failures are inconsistent
"Chinesium: A common element that breaks, cracks, or deforms on a consistent basis and usually at the worse possible moment. (See Also: Murphy's Law)"
I'm still kinda hung up on how I want to do my end stops and home.. 1 sensor per axis (on the axis) with flags at either end., stationary sensors on each end of axis. and weather I want the end stops to act as home..
[20:04:33] <frallzor> http://www.lolz.se/uploader/pics/git1.jpg http://www.lolz.se/uploader/pics/git2.jpg
Connor: End stops as home save IO pins, but does get annoying if you always work in the middle of the travel. If you have enough IO then I would put Home at the normal working point.
ok. well.. with traveling sensors, I could put 3 flags, one on each end, and home in the middle...
also, this isn't just a CNC, it's also going to have a extruder too.. (entrchangable)
Pumps and Motors http://sfbay.craigslist.org/sby/bfs/1944227709.html
Connor: No you can't, as EMC has no way to know if the sensor is seeing a home flag or a limit flag
And I think that a mid-travel home needs a very long flag, so that it knows which way to go to find the end.
I've seen so many ways of doing it.. I just getting overloaded..
all limits in series + e-stop, then 1 each for home... independent limits... with home.. independent limits (using 1 as a home)...
Endeavour_ is now known as Endeavour
!later andypugh andypugh: (sent via "later") Interesting you should be asking about that star point, I was just asked for advice on a friend's trailer mounted generator and I was surprised to find that they bring out the other star point. In addition to the usual T1-T9 wires, this adds T10-T12, so you have the ends of all six coils. Very nice. Not sure how this answers your Q, if your motor is one-voltage-delta, you might not have a wye point, or anything, for
!later andypugh andypugh: (continued via "later) that matter. (bah, flooding again, sorry.)