MarkusBec is now known as MarkusBec_away
ugh i just found out spindle bearings are like $540 for my mill
MarkusBec_away is now known as MarkusBec
MarkusBec is now known as MarkusBec_away
danimal_garage: I know someone who bought a brand new Bridgeport manual series I, the bearings went out at 3 years, 1 month
right after the warranty expired
BP sent a guy to replace, cost thousands
A question for the devs: Why is parport mode EPP preferred over ECP?
coldelectrons: does that cause any problems?
I'm just curious - I've been reading datasheets, and I can't see exactly why use one over the other
just because, that's why
usually there is no issue
If I wanted that kind of explanation, I'd go over to #theology :P
who wrote the module?
No particular module
well, there is no particular dev then I suppose
Just in all the discussion and mailing-list that I've read, EPP is talked about, but I don't ever recall seeing ECP
I think that's correct, only one works
there may be no particular reason, I wrote some code for an emc device driver once, and I used the pp code that worked
but some chipsets don't support both modes
If ECP mode could be used, that means all those NetMos parport cards with the EPP timing bug might be usable
I have a couple of Netmos cards, which is why I'm looking into it :)
I would prefer the devs spend time on stuff that matters to large numbers of people, and they probably will
This might matter to a large number of people - Netmos cards are quite cheap and prolific
I already know they work fine in SPP mode
[02:05:19] <Jymmm> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?NetMos
Yes, Jymmm, I know - I made the original wiki entry
ECP adds DMA to EPP, which is unnecessary
I wouldn't assume that a card that has a timing error in a slower mode will not have an error in a faster mode
I guess I have more reading to do
well, that's just my understanding of the situation - I might be the one who needs to do more reading
as far as I know, an ECP port simply adds DMA modes to the EPP standard
I have this feeling that I'm about to be corrected
EPP and ECP use different handshaking protocols
ECP uses 9 wires (well maybe 7 would be enough)
for hand shaking, EPP only 4
from a driver standpoint though (specifically a HAL driver that uses all the pins for I/O), they're effectively identical, no?
I know the 7I43 cannot easily support ECP, dont know about the Pluto or Jon Elsons stuff
I know EPP mode is compatible with SPP mode, not sure about ECP
ok, I guess that's the point anyway
that ECP probably doesn't help in terms of making things more compatible with the HAL parport driver
Yeah, it always was a BIOS compatibility issue iirc
(and parenthetically that an EPP timing problem is unlikely to magically disappear in ECP mode)
I think the NetMos problem is EPP only
oh. well OK then :)
SWPadnos: I wanted to ask you something
I really wanted to answer too
but I didn't knowwhat to say
SWPadnos: Ok, then can you go ahead and answer, so I can rememebr the quesiton
No, I already know the maning of life
OH I know
some LED thing?
anyone pay with ardunio yet
jepler has, AFAIK
oh ok , I just wanted to know if it's worth it, seems to be
I was thinking of controling a LM317 usign ardunio like a dimmer flasher
am I nuts?
oh, just on general principles
your scheme may work fine
Well GP I already know <rolls eyes>
ok, so it is realisitc to be able to do this?
no, I don't think so
I believe those regulators work by sinking a small current through the adjustment terminal, something you can't control with a microcontroller
it might work, if the current is just to make a voltage on that terminal, but I'm not sure
[02:30:28] <Jymmm> http://www.google.com/url?sa=t&source=web&ct=res&cd=2&ved=0CBUQFjAB&url=http%3A%2F%2Fwww.national.com%2Fds%2FLM%2FLM117.pdf&ei=ucUZS421DYjWtgP69JD3Bw&usg=AFQjCNHyNOOG7CYQWmoTlg9RaDHV1pMuIA
I'm looking at the datasheet now
pg19 has a current limiter
bottom of pg20 is sorta what I had in mind
oh man, I like "Digitally selected outputs" on pg22
well, sort of
that's a selectable voltage output, not a selectable current limit
SWPadnos: Well it has a MAX Vout setting too
still not a current limit
not also that in the current-limiting setup, all the current still goes through the resistor, thus not saving any power (but being more accurate with varying load)
SWPadnos: Ok, I know you keep saying current limiting, and I know I don't get it, but I'm going to be mix and matching different voltages of LED's and that's how I keep thinking.
SWPadnos: See, If I have a 3VDC PS, and I have two 1.5V LED's in series, I don't get why I need to have to consider current limiting
well, what happens if the supply is at 3.1V, and the LEDs are actually 1.497V @ rated current?
you now have 3.1V across two LEDs that want a total of 2.996V, so the current goes up drastically
ok, it goes poof
well, at least one does, yes
it might save the other one
incidentally, note that the LM317 needs about 3V of supply headroom to provide proper reguilation
but I'll have a hard time mix and matching 1.8V@20ma and 3.2V@40ma leds
on the same chain
and that power is all dissipated in the LM317 - it's a linear regulator, so the power is I*V
for each chain, you get exactly one current setting
so you wouldn't be able to mix and match, as you said
SWPadnos: Yeah, which will kinda suck
btw, I kinda play it safe in wiring them up, not MAX OUTPUT
I think your best bet is to wire up chains of all LEDs to run from some fixed voltage, say 12V
you use as many LEDs as you can "fit" into 10-11V, and then use a resistor to set the current for that chain
SWPadnos: Yeah, that was the intension
for the 1.8V ones, you'll get 5 or 6 LEDs in a chain (probably 5, 6 would be too close to the 12V mark)
the resistor when I have to customize the chain
yes, each chain of a particular type of LED is already "custom", so it might as well have its own current-limiting resistor
Ok, what about uC controlled? PWM ?
what to use for that? 2n2222 ?
I have some code that does 16 channels of 8-bit PWM in about 40 CPU cycles on an AVR
sure, or a FET
or a darlington resistor, if you want more current
(I think the FMMT4401 is one such, in an SOT-23 package)
SWPadnos: I only know 4 silicon, and I told you two already =)
there are open source led current regulators out there, takes a little looking to find them
darlington transistors are basically two BJTs in a single package, so they have current gain in the tens of thousands instead of a few hundred
SWPadnos: so nothing like the uln2003?
unless you want relatively low current limits
could have feedback
* Jymmm checks the ghetto parts house
[02:51:03] <SWPadnos> http://www.instructables.com/id/EK2XAPS11GEWOF2YSD/
or for $30 you can have a maxflex that does whatever you want
I'm goig to assm those 3 leds are all the same specs
or for $20 you can have a buckpack that does whatever you want
the voltage doesn't matter, only the current
eric_unterhausen: links or they dont exist
ok, one minute
which is also true when you make your own 12V chains - you can use 2x3.1V + 2x1.8V if you like
as long as the currents are the same
SWPadnos: cant find that fmmt4401 http://www.taydaelectronics.com/servlet/Categories
[02:53:08] <eric_unterhausen> http://www.taskled.com/order.html
voltage source will determine which you want
eric_unterhausen: oh that's way too expensive, but thanks
[02:54:09] <eric_unterhausen> http://ledsupply.com/wired-buckpuck.php
OK, how about this instead: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=BCV27TR-ND
(DK is out of stock on the FMMT4401)
(and it's not a darlington either)
rob some schoolkid of their lunch money, you can pay for one
eric_unterhausen: I would need one per chain too
that could add up
Jymmm what are you trying to do?
SWPadnos: what's so different from what you gave to this http://www.taydaelectronics.com/servlet/the-200/ULN2003AN-ULN2003-ARRAY-dsh-7-NPN/Detail
other than the contorl pin =)
current, for one
SWPadnos: but i thught we were tlking abotu using a resistor for that
it may not make any difference, but if you want to parallel multiple chains on a single output (say 10 white strings of LEDs that are all one PWM channel), you'll want to have higher current available
zetex is the led current regulator chip everyone uses because it's easy
I was after something to run ~100-200 LEDs preferably with variable current, all individually controlled on/off
SWPadnos: OT, but can the ULN series be PWM controlled output, for saw a motor or whatever?
sure. it's a bundh of transistors
like speed control
making this up for a guy http://www.vapourforge.com/hotness/capri-dash%20MK1.png
max2930 iirc 5x7 led driver
it's older, abotu $7/ea@1K
you can cascase them too
I was just thinking about charlieplexing a batch of leds for a desktop christmas tree
it'll control up to 8 5x7
[03:02:51] <eric_unterhausen> http://en.wikipedia.org/wiki/Charlieplexing
I'm impressed I remembered the name this time
we made the clock you can see in the backround here
[03:04:15] <Valen> http://i23.photobucket.com/albums/b389/762378/spark.jpg
thats just done with darlingtons
stings of 4 or 5 blue LED's with a resistor on each
4 strings in parallel per segment
(one resistor per string, I think it was 10 ohms or something like that, more of a "just in case" than anything else)
all our LED's came from one batch though
What would you saw the lead gauge is on a 1/4W resistor? 22?
nfi about guages they dont make sense to me
bout half a mm I'd say
that dont mean crap to me =)
I just need to know if it's bigger than 22awg
yeah but at least you can measure it
what are you trying to do anyway?
funny. I've done something like charlieplexing for jumper inputs to a microcontroller
standard pull up/down for the jumpers, plus detection of shorting two input pins together for more options
SWPadnos: Huh? isn't that sorta pseudo floating?
SWPadnos: what to you "see" when polling the pins?
as an example, they'd be pulled up in the micro, if a pin is seen as a low, the jumper is installed "normally"
if pairs of adjacent pins are both high, then you output low on one, and see if the next one changes also. if so, they're shorted together
SWPadnos: but what to you "see" when polling the pins? (when shorted together)
you get 29 combinations on 4 port pins
err, no. you need to flip one or more bits to output low and see if the other inputs change as a result
SWPadnos: Ah, ok
SWPadnos: so it's not the static state, as much is a dymanic state of the pin
yes, it's a dynamic read method that you start using if the number of jumpers turns out not to be ebough :)
A=1; If xyz change, there ya go
ok, I get it =)
yes. if I read 1111, then look for shorted pins
I think I'm ging to order a ardruino and the wing thing too
but nobody has the wings in stock =( http://126.96.36.199/images/products/09282-4.jpg
there aren't regular shields with screw terminals?
a normal sheild is just one board
also spelled shield by the literate among ust
I like the fact that you can add/remote it easily
and you STILL have the normal sockets there too
you dont even have to unwire anything
funny, the shield layout was a mistake
I hate that term "shield" they used for add-on boards
it's a daughter card damnit!
and has been for 40+ years
arduino means difficult in italian
or daughterboard, either one is fine with me
otoh, you know exactly what they are talking about when they say shield
and wth is the deal with (what they call software)
actualyl no, a shield to me means EMI/RFI shield
of course, now they are going to get everyone to call their daughtercards "shields" and the advantage will be lost
not a fscking knights of the round table crap
I like daughters
$2.00 or so each from DigiKey
zetex I say
the big advantage being that they actually have a step-up regulator inside
oh - that TI part was just in one of my tabs. I figured I'd say something before shutting it down :
actually, there may be better chips
but in the diy led world they all use zetex
there used to be something called the LEDuino, but I'm not finding it
eric_unterhausen: links or they don't exist =)
SWPadnos: Well, I guess I could wire a resistor to each led, but I don't think any of these are going to be able to handle mixed led types
SWPadnos: Consider the RGB LED's as example red is what 1.8 and blue is like 3.2v or soemthing like that
If I overvolt the led, it's gonna blow
it's overcurrent that blows them
(though too high a voltage causes too much current, so more or less same thing)
if the red needs 20ma and the blue needs 40ma, limiting current might make the red dim, no?
err blue I mean
you wouldn't run them in series
so you would have all reds on a chain (supply voltage permitting), all blues on another chain (with its own current set resistor) and all greens on another chain
Well how can I mix different coltage leds in parallel?
SWPadnos: I want to mix types of leds in the same string
unless you can't do that due to the LED pinout, in which case you'd have to use a constant current (or current-settable) scanning driver
I will if I REALLY have to, but that's $8/ea
mroe for RGB
more for RGB driver
well it depends on the devices you use
something with RGB LEDs and 4 terminals can't be chained, because it has a common cathode or anode
i have a choice of 2 computers for my next emc conversion, one is an asus board powered by an amd xp2800 and the other is a dell tower powered by a 2.6ghz pentium 4 without hyperthreading. both have 1gb ram. I realize it comes down to the latencey test, but do either stand out as better for emc?
both have integrated sound and video, but i have a radeon card i can use
i'm excited, all i need is a couple more pieces to do the conversion
probably the amd
any good reason?
intel architecture was controlled by idiots until fairly recently
I'd say whichever one does better on the latency test is probably better
either has way more CPU than you need
yea, the price was right on both
do the test, but you asked for a guess
one was a dumpster find, and the other i basically got free with a monitor
yea, I was just curious if one consistently outperforms the other
no, it depends on the motherboard pretty much
the amd box has windows installed with all my cad software, so i'd rather use the dell if possible
but intel decided latency didn't matter, marketing did
do it with the livecd
oh yea, huh
good idea, thanks
cool, i modified siggen to get a new wave. the hal manual showed how to make x&y run circles with sine & cosine. i added 'xbox' 'ybox' which walk around a box rather than walk around a circle. (good for edm :)
i'm going to ride my bike 200k tomorrow, why am i not in bed sleeping?
wow, whats your average pedals/minute?
you should be drinking
i dunno, I take forever, that's the secret
dirt or road?
so road i take it
still a healthy ride
hopefully it will just be flurries
yeah, people always tell me it's a short ride
had friends ride a lot in taiwan, they had very high rates while i thought big low gears was cool, theyd always be pedalling fast, on flat on hills, just always.
which it is in comparison to 300k, 400k and 600k like we often ride
whats that in miles
(for the 200k)
i'm bad with the metric systyem
and spelling apparently
SWPadnos: this is fun, if i change the amplitude, i change the side of the square, and it 'expands'
yes. around the center even
the most i've ridden at one time is 100 miles, but that was in Brian Head, Utah on dirt
on a single speed
SWPadnos: no not about center yet, thats on the todo list. if i begin a circle or sqr using sin/cos/xbox/ybox, its assumed i'm on the perimeter
oh - I thought you were using siggen
(which I thought would expand around zero)
100 miles on dirt
SWPadnos: yes i rebuilt siggen to do sqrs, siggen begins on perimeter
did you add a phase parameter/pin?
no worse than 600k on road lol
I rode 375 miles in 32 hours back in may
it was a race, the brian head epic 100
took me 9 hours 6 minutes
32 hours is a long time on a bike
danimal_garage: I figured, nobody rides 100 miles on dirt except for a race
yeah, my night riding companions were slow
SWPadnos: 2 new pins one, theyre 90 degree out of phase truncated triangle waves ( clipped & out of phase so one axis stops while other moves )
we rode 60 for fun last week
SWPadnos: 'walkin the dog'
oh - I was thinking of a phase pin that would offset all the waveforms by that fraction of a cycle
not too many miles, but there was 12k feet in elevation gain
then you could set one siggen to 90 degrees offset, and use any of the waveforms
SWPadnos: its built in, sorta, there's a % of done he called 'index' , it goes 0 to .999999 in one cycle, you just offset from that to get phase shift
hopefully the new compressor is loadas quieter than my old one
SWPadnos: the big change is that just phase wouldnt do a square motion, you need to stop x when y moves, thus the truncation
danimal_garage: what compressor?
I need one
err - the square wave should do that
picked up a new compressor today.... a 80 gallon curtis
if you offset one by 90 degrees (unless you're using it as velocity)
SWPadnos: no his sqr is bipolar +/- 1 not ttl ish like 0 1
i was running a 20 gallon piece of junk from autozone
danimal_garage: is it a rotary screwjob?
na, 2 stage 3 cylnder
the lbs has an old compressor that makes no noise
i'm too poor for a screw compressor
how much was yours?
i got a killer deal on it, the guy didnt know what it was worth
it's a $1700 unit, and it's only 4 years old
how many horse?
[05:03:04] <danimal_garage> http://img.photobucket.com/albums/v20/danielwilcox/DSCN0725.jpg
are those mufflers?
i dont really have room for it, but i guess i'll make some
i guess once i ditch the GE controller on my lathe, it'll fit
SWPadnos: i was thinking of adding a second amplitude input so sine & cosine could generate ellipses, so xbox, ybox could create rectangles
just use two siggens
will they sync?
I would think so, if you (a) connect the enables to the same signal and (b) run them in the same thread
and of course set them to the same frequency
yep sounds interesting, but will look into that later
that was the scheme I was envisioning for the 90 degree offset square (or whatever) waves
next i want them to expand to a radius/side and return to center nicely ( driven by external voltage )
sure - connect amplitude to the external voltage, and they expand around the center already
so when amplitude goes to 0, they go to center
I'll bet if you run an axis output into the offset input (which was a parameter, but may now be a pin), you'll have a variable orbital offset to the commanded machine position
still trying to grok that
it may be better to use an external sum2 - that way you can ensure that the offsets are disabled by disabling the siggen
which would set the offset to zero, not the axis position ...
i'm not using emc at all
oh. well a sum2 is still appropriate for the same reason
whatever generates the axis position would then have a "pass through with no offset" option simply by disabling the siggen
i didnt think it'd return to zero, but i had been just slammin new radii into it. if you walk thru the values from 0.001 to 5 nicely, and then back, it looks like it returns. thats great
time to document, remove debugs, & get to sleep, thx SWP
Just this once .. here's the log: http://www.linuxcnc.org/irc/irc.freenode.net:6667/emc/2009-12-05.txt
EbiDK is now known as EbiDK|AWAY
hey all, if I buy a mini desktop PC with integrated video card, would this be a problem for EMC2? I would like to have one of these because fits in my control box
take a live cd to the seller and test latency
some integrated videos are a problem
archivist_emc not a bad idea... next week I am going to the US and hoping to buy something affordable...
is a system of 350 USD a good deal?? last time I bought a PC was Hmmmm 8 years ago, and I got it from my employer
I use old freebee pc's for emc
I usually build my own from parts
I just want a nice closure so it fits in my control box next to the rest of the electronics... I could buy it from pats, but still I would need to buy parts and the mini enclosure for the PC...
we don't have freebee PC's here in this country...
then try looking for one that has known latency results
there's a list that you can find at http://wiki.linuxcnc.org/
I get barebones from http://stores.ebay.com/MICRO-ONE-COMPUTERS
parts from newegg usually
well, I don't have easy access to online stores :s
MarkusBec_away is now known as MarkusBec
alex_joni: I went with a script and used the ftp command to upload the image of the lathe control
I have to use Cheese atm to capture the picture LOL as I have not got any of the command line capture programs to work
ey swpadnos, any ideas on the Z axis being heavy and how to deal with that wrt tuning PID loops?
or anybody else for that matter
fail on casting :/
and i blame the foam :P
to dense foam
and BAD finnish on the piece :/
or , if you have hd cd &vid already http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5367062&CatId=332
these mobos are listed at wiki as passing the latency tests acceptably. cheap too.
tom3p: I will try to find a store were they sell that stuff, the computer case is rather big though
Has anyone here used the debian lenny packages on the wiki?
Valen: Counterweight the Z axis ???
I don't know if it would work with EMC2 or not but sometime on a system with a big force offset like you are describing, the tuning parameters are changed based on the direction of the axis movement.
That is pretty common in hydraulic servo system where one side of a cylinder has more surface areas than the other side due to the cylinder rod.
Of course if you don't want to go fast or have fast response you can tune it as a compromise in both directions
Hm...everything seems to be working (latency tests, etc), but I'm getting a bunch of "HAL: Error: Could not open shared memory" and stuff
Valen: gas spring counterbalances ( new machinery uses them rather than counterbalances ) http://www.hysonproducts.com/liftstrutcounterbalance_hyson.html http://www.kaller.com/web/Hem.aspx
counterbalances are cheap tho
Valen: You can also use an air cylinder to counterbalance a heavy axis, use a decent size accumulation tank to feed the cylinder and put an air regulator on the accumulation tank - makes a good controllable balancer.
jthornton: I think the problem is that the cam is only supported by v4l2 not v4l
and most command line programms assume v4l
you can LD_PRELOAD a v4l app to talk to v4l2 drivers
I trying to move a unipolar stepper motor with an uln2003a, using 4 wire like this http://axis.unpythonic.net/etchcn,
What configuration I need to apply to emc2?
sorry, this http://axis.unpythonic.net/etchcnc
cemede: look at youremcdir/configs/stepper/README, likely has the info you need.
ok, i go to see that
tom3p I using the live-cd 8.04
cemede: sorry, i just looked at the schematic for that... you have something special there, 4 wires per motor connected to the parport. read up on 'stepconf' a utility to design the hal files and determine the parallel port pinout.
yes, that's what I trying to do, use stepconf, but by default there has only "X Step" + "X Direction" on pin 2&3, and 4&% has the Y axis config
cemede: i just ran stepconf, you're right its not set up to handle 4 wire motors. sorry, i have no answer, someone else may know a file for you to look at.
you need to do it the old way .. e.g. yourself ;)
start by reading the stepgen docs (integrator's manual)
yes the lower level component 'stepgen' can handle 2 control modes for unitpolar motors ( type 5 &6 esp )
[17:52:58] <tom3p> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?action=browse&diff=1&id=Stepgen
why the guy from the url above (etchcnc), does not mention the config that he used?
I also tryed this circuits http://www.8051projects.net/stepper-motor-interfacing/unipolar_stepper.gif
and this http://www.tigoe.net/pcomp/img/unipolar_stepper.png
but with no luck
cemede, I just dropped in, but with those circuits, you will need to use stepping type 2 (I think) or one of the higher step types... step/dir will not work
aha, I understand
cemede: the simplicity of the driver chip you used, creates the need for a complex wiring a:) but, you can put a unipolar driver between the computer and the motor (not the uln2003) and get simple step & direction control from computer to driver. the motors just wire to the drivers output. example :http://kitsrus.com/pdf/k179.pdf
well, yesterday, I take apart a old fax to take some motors and It comes with this uln2003a and a L6219
you can drive it with the uln chip, but you have to figure out how to connect motor to chip output, and parport to chip input, and how to control the parport from emc.
you spend time or you spend money. (dont hook to motherboard parport unless you are willing to risk it , try to use a pci parport card instead )
sure it's unipolar? the l6219 is designed for bipolar http://www.genesis-microchip.com/stonline/products/literature/ds/1377.pdf
maybe you can just hack to old control board
yes, fax come with two motors
bipolar and a unipolar
I also have tons of uniplar motors
how to visually recognise wheither it bipolar or unipolar?
I want to build PMinMO L297-8, but actually I don't have the hardware, I just try to play with what I have
dimas_ unipolar has 4 wires normally
bipolar has 4 wires
unipolar has more
i have one with 5
it's unipolar then
(the kind of unipolar that you can't drive in a bipolar configuration)
and when 6 - it's unipolar as well?
that's unipolar, but you can drive it with a bipolar drive
I remember that you answered this but: how is ot going with more than one pwm frequency per mesa/hm2 card?
cemede: look into these, 6$ per chip, simple emc2 compatible interface, drives unipolars and with external fets can get some power. ( replaces classic 5804) http://www.stepgenie.com/
tom3p I have acces to some free texas instrument parts, for example this http://focus.ti.com/docs/prod/folders/print/drv8811.html
can I use it for that job?
micges: What is it the you need maybe I can figure a way to do it with whats already there
I have pwm controlled laser and servo and I need 20kHz for servo and 100kHz for laser, and on other machine I have 20kHz for servo and 1Khz or lowe for THC DC motor
I saw something about two pwms from one mesa you're talking some time ago
so I'm asking
Well if its for analog out you can use PDM for that and PWM for devices that need PWM (PDM and PWM rates are different)
cemede: it looks ok to me, but you must study the sheet to see how o wire to emc2 ( step & dir ) and study the motor to see if this chip can drive it. you would be able to use step conf to design the ini & hal files.
Also if you bypass the driver, you can get binary multiples of the PWM rate on different channels
(the PWM generators are individually 9,10,11 or 12 bit resolution so for example if the reference counter
has a base rate of 24 KHz at 12 bit resolution, choosing 10 bit resolution would give you a96 KHz 10 bit PWM channel)
pcw_home_: I don't know if pdm can be used for laser but if so first problem will be solved
can i plug a pci video card into a pci-e x1 or x16 slot? ( no idea what pci-e is but its on a mobo i'm looking at )
pci-e = pci express
lots smaller connector
PCIE is 1mm pitch instead of .050 inch also
PCIE cards have a specific PCB card extension to prevent plugging PCIE cards into PCI slots
I think the keying and lengths prevent plugging PCI cards into PCIE slots
tom3p the drv8811 has 2 pins for step & dir (19 & 3), but I don't know how to wire the rest of it, for example USM0-1 (microstep mode), decay, and other sensing things..
cemede: microstep mode is something set on the chip (like a jumper or pull up resistor) it does not 'talk' to the emc, or parport. if you are not comfortable with such problems, look into higher level solutions.
cemede: how to wire it is: read the chip docs, read the emc2 docs, design on paper, try with no load, try with load.... go back to step 1 and repeat ;)
catch the smoke too
yeah, but I'm totally a newbie now :P
so give up
alex_joni: pcw_home: thx about pci-e i finally looked at wikipedia to see pci just doesnt fit ( pci-e 1x is teeeny! i got one of those & wondered what that was )
[19:42:25] <alex_joni> http://cheezburger.com/View.aspx?aid=2880049408
alex_joni: I don't see the problem with that... easy access for the burglars and the 16yo hormones to enter
jepler: What do you think of the arduino? I'm thinking of getting one.
any idea for gaintry servo hal file on mesa 7i43?
issy: you can start of study this: http://axis.unpythonic.net/01162326817
thanks mic , many thanks.
toast_ is now known as toastydeath
for different conversion kits can i find exactly what timing belts and pulleys they contain?
the smallest one
alex_joni: it is v4l2 type... xawtv can see it, now to get it to capture a picture :)
alex_joni: yes it is a v4l2 device... at least xawtv can cee it
18:05 < oPless> you can LD_PRELOAD a v4l app to talk to v4l2 drivers
thanks alex_joni I missed that
[22:23:51] <alex_joni> http://en.gentoo-wiki.com/wiki/Webcam
DAMN DAMN DAMN I can't decide to keep or get rid of this 14U full depth portable rack =(
got a pic?
Front view: http://farm3.static.flickr.com/2365/2341661963_262a8a0e38.jpg
Top View: http://farm3.static.flickr.com/2095/2341662349_0325bac986.jpg
Even has front retractable wheely bars
rolls around as smooth as can be, can hold a 1000+ lbs easily
It be perfect if it wasn't so deep
Yeah, i know.
I got rid of the 4U switch a ways back, have a 1.5U Cisco catalyist now + a 1U 24p 10/100
tom3p, my casting went to shit :P
[23:04:42] <MrSunshine> http://pici.se/511881/ http://pici.se/511882/ http://pici.se/511883/
too small details etc .. :)
to thick foam maybe
as it took ages for the aluminium to eath throught it
MrSunshine: i think you have a sprue problem also, the 'rest of the ring' didnt fill and you could extend your sprue to the far side, also at the furthest filled points, add small pocket outside so fill flows past the problem and occurs in the garbage extra bit
fwiw, i'm not a lost foam caster, just ex mold maker
tom3p, aye .. dont know at all how to make the sprue system :)
tom3p, but like i said ..the foam seems to thick
on the middle of the thick piece in the middle of the part on the far side from the metal intakes it hasnt filled fully
telling me that the foam took to long to burn off
so the metal got under poring temp even before it filles the 10mm thick part
and on top of that expecting it to fill a 5mm thick piece like the extruding part is just silly :P
and ive been warned about jackofoam before
as its a bit dense
Jymmm: the arduino is fine. it's a 16K or 32K flash AVR with 2KB flash used by the bootloader.
Jymmm: I am not in love with the arduino environment, but you can also program the devices with regular C programs at the commandline
Jymmm: having the usb/serial bootloader really makes the program-debug-by-printf cycle easier
tom3p done, I found circuit and EMC2 config to use the DRV8811 ! The circuit uses a Allegro A3979 which is compatible with the DRV8811 (pin and function compatible) http://hobbymechatronics.com/electronic-projects/11-projects/14-diy-microstepping-motor-driver
here the breakout board http://hobbymechatronics.com/projects/29-mechanics/11-sherline-cnc-conversion?start=4
and here the EMC2 config http://hobbymechatronics.com/projects/29-mechanics/11-sherline-
if you have a spare 30 bucks and a project, it's worth a look
MrSunshine: ok, i have no feel for how thick molten aluminum is
not realy thick until it starts to solidify :()
and burning of material takes heat from the metal right? :)
the sprue lets hot gas escape too, so it doesn't cause back-pressure
maybe drinking straws glued to the foam?
i like open cavity molds more realy .. there you know theres nothing that stops the metal more then stuff traveling to far :P
jepler: how close is the dev lang to native AVR c?
cemede: looks nice, you buying the pcb ? and soldering the smt's yourself? (you got better eyes and hands than I ;)
Jymmm: arduino is C plus limited C++ plus basic functions for pin I/O and serial I/O plus add-li libraries for stuff like onewire and the like
MrSunshine: yes a gas vent would be good
that motor mount would work in an open face mould, if you don't mind drilling the holes
soldering smd's relly isn't a big deal
the "sketch" naming convention bugs me
jepler: Ok, I'd have to re-learn c, is why I ask
tom3p, thats what the small one was supposed to be .. but figured after ive done everything that nothing would be able to escape throught it :P
DaViruz: 'shield" bugs the shit out of me
tom3p yeah, I have great soldering skills :P
i huess most their names bugs me
bbl really this time :)
but i like to say 'arduino milenove' to the girls at the bar " buono note signorina dove pose una arudino milenova?'
sounds better after afew drinks
i like words i can pronounce
and then you find out the hard way that arduino means "itchy fanny"
don't try it in Naples :)
tom3p, arduino as a pickup line? :)
aparently one of my gym friends has been a NC programmer for 10 freakin years .. never used a cad program to do the g-code .... how the hell :P
4 axis g-code in the head ?
MrSunshine: only if im sure the girl doesnt speak Italian
tom3p, hehe :)
and your friend, yes, 4 axis, a calculator and 10 yrs of experience, no cam needed
i cant wrap my head around thatr :P
MrSunshine: did you leave the foam in the riser & the sprue?
toast_ is now known as toastydeath
MattyMatt, foam everywhere
pencils would hold a hole in the sand open while you packed it
MattyMatt, usinga ceramic shell i do not pack any sand
i just have dry sand aroun dit .. .shake it in place and cast
so a pencil hole would collapse on itself quite fast :)
are you talking about lost wax?
why not a foam sprue?
it won't let gas out until it's melted itself