that's how they look
they do look nice, I'll give you that
thats like a model R/C engins throtle right?
it's for a full size car..
lumenition is competition stuff :)
thats what I meant, ive only seen that on small things
it's 48mm through it ;)
It will be fine on full throttle,
gezr has changed the topic to: robin_sz I guess I better get to learning how to code hu?
ChanServ has changed the topic to: Welcome to the Enhanced Machine Control forum | Regular Developer's meetings every Sunday between 14:00 & 18:00 GMT
but they have poor charecterstics on low/mid throttle .. the air hits two restrictions, the front opening and the rear opening
cant use the /t feature in this client
Its been far too long since ive used things I guess
even the model car guys swap roller throttles for really small butterfly carbs if they can afford it
still .. they do look nice ;)
I was listening to a nice engien again today
what kind of engine?
V8, fuel injected
open pipes ...
tacho starts at 7k, redlines at 12K
the redline of my engine that I am building is about 9k rpm
this is a 1967 F1 engine ...
I cant imagine how much the car is worth ...
what are you going to put it in?
or is it in a f1 car?
oh its not mine
ah ok :D
its in a classic F1
anyway, I need to go to bed now
you go ... have a nice one
the new of Irc will wear off soon I hope
after 8 years of it, I got out of it
I like IRC, I waste too much time on it though
I hope the stuff with the segmot is going well, or hasnt stopped
I have an alternative running:)
AIUI, it works fine
98% of the time
as I understant it
but every now and then it craps itself
cradek took a huge step forward last night
thats handy :)
theres a 'buffer underun' problem thats been there for many momnths
what I would like to do is learn how one G0 X2. from the program, passes through emc
i doubt it, ts has win and lin clients
hey, emcmot is the normally used one?
ill be back in a bit
didnt miss a beat
its getting late .. wife has gone to bed
and tomorow I have all 3 kids for the whole day
that will be hard
tiring and difficult
better go .. I need the sleep :)
take care :)
okay, rs274ngc gets to look at the command first I think
no I dont know, just more looking I guess
well im totally lost
today was a good day. I got my retrofit CNC machine to run its first g-code with emc! http://axis.unpy.net/index.cgi/01104286247
(you'll miss the joke if you don't visit the website)
ive got code on the brain, i probably missed the joke but its awsome :)
thats soo sweet
wait, im talking about the etch a sketch, no mill photo
that's the "mill"
I love it
I may buy a sherline to retrofit in 2005, but for now this is the only CNC machine I have
i ordered some brass to make some chess pieces, and then 3 feet of acme, and 2 nuts to use as a machine for noe
didnt spend much at all
Ive had 2 ball bearing drawer slides lying around and thought about a way to make a simple machine today
one fixed axis using one slide | y max travel 12inches or so
hm, I'm trying to envision this
the other slide atatched to the y one, where the motor rides on a wheel to move with y, its motion --
so I have a xy table and then I have some springs, and some solenoids, ill use to retract with spring, and down with solenoid a pen, so I can make pictures
I doubt I can add even that simpe a z-axis to my machine
you wouold have to hack the etch-a-sketch
yeah, and it's not made to be opened and then closed again
well why even hack it, you could do what imdoing using strings and make the pen carrier sorta heavy, ridding on 3 or more marbles, with the pen/stylus in the middle
thats all thats inside the sketch I think
then you could have a paper copy,
I love stuff like that, I had to buy the brass rod today, its for chess pieces for my brother xmass present, the rod and nuts were like 20 bucks I think
hey, are you able to follow through the code, a commanded move of g0 x10. where the tool is at x0y0?
when I look at the code and maybe im not looking right, I dont see where or how, its read, g0 oh okay, were gonna rapid move, where are we now, where are we gonna go, oh its a straight move of one axis, which axis, how far... stuff like that
I don't follow you
you're asking how emc works when parsing g-code?
not so much how, but where
when looking at the source
the rs274ngc parser (in src/rs274ngc_new) reads the g-code line by line, and makes calls to the "canonical machining functions"
these are functions with names like STRAIGHT_TRAVERSE
is that in emc2 or emc?
I've never looked at emc2
there they are ah
emctask/emccanon.cc implements these functions, does some extra calculations, and puts a different representation of the actions into a global variable "interp_list"
that's where I get fuzzy. I think the next step involves transmitting the items in the interp_list over to the realtime side for motion planning
the rs274ngc_new parser of emc1 is describe pretty well in this document: http://www.linuxcnc.org/handbook/RS274NGC_3/RS274NGC_3TOC.html
one more question, this is probably directly related to c, when I see something like G_1 thats just another way of saying what I see as G1?
Yes, G_1 refers to G1. What's going on there is that rs274ngc defines some codes like g64.1 which are decimal fractions. rs274ngc_new multiplies those by 10 so that it can treat them as integers. So G_1 is a constant equal to 10, which is the value stored somewhere to indicate that the current motion mode is "g1" (straight feed)
this is done for all G-codes afaik, but not for M-codes.
er, I guess I mean G61_1, there's no G64_1
right I saw that in the code
I didnt really see a direct G_1 to g1 but I may not have been in the right place
they would call a 64.1 probably a 641 I think
im gonna just drag on you guys to explain this simple stuff to me
"read_g" would parse G1 in the input file and set the state variable block->g_modes to G_1
okay, then there is more stuff reguarding read_g starting on 8805
one thing about emc: they are layers and layers and layers of it
layers dont matter if I have a starting point, the rest I can bug my friends about, last guy I asked to look at emc outside of emc almmost lost his mind, well he didnt do that, he left programing and is becomming a lawyer
jepler_ : your in the us right?
gezr: yes. lincon, nebraska to be more exact.
ah cool, Conway arkansas here
not a part of the country I've been to
I work about a block from the (anything I say from this point on could be taken the wrong way, no matter how I try to say it,) the library,
the web says conway is 43k people. that's a good size for a town to be.
yeah, its nice
I'm going to head off .. good luck with figuring out emc.
take care, and thanks for letting me ramble
jepler_: congratulations on your new machine!
sounds like it's awfully fast
is it running on your laptop or bdi?
on the laptop with bdi-live
did you find a flexible coupling that works?
(I notice the drawing isn't very round, but it's not awful either)
if I draw the globe twice in a row, it's clear that it's lost a few steps. But not as many as the nonroundness would seem to imply
I think it's mostly an EMC tuning issue
you're sure it's losing steps and it's not the etch?
I'm not sure
another test was to draw a circle (two arcs) 26 times. It repeated very closely every time, but the square looked rather .. boxy
er, the circle looked boxy
at the quadrant boundaries or elsewhere?
the top, bottom, left, and right seemed flattened
I see something like that on the right of your globe
all of the arc-like bits are flattened. You can see a pattern that one is flattened "up" and the next is flattened "down".
I can't picture what would cause that
probably has to do with the wires on the pulleys inside
alternating verticals are drawn from bottom-to-top or top-to-bottom
I see the pattern in the verticals now that you mention it
so the flattening-direction and movement-direction are related
you didn't have any problems with using your laptop (controller missed realtime deadline)?
no messages like that
after my luck I thought maybe all laptops were useless for RT
but maybe it's just mine (or APM that requires switching to real mode)
I didn't try f.e. closing the lid switch while it was running .. or building a kernel .. but without taunting, it worked well for most of an hour
should I worry if my steppers get warm, or only if they get too warm to touch?
warm is fine - hot is even sometimes fine
you're running them within the specs, right?
how much v are you feeding them?
mine have never even gotten warm, but I suspect they're grossly underdriven
it would be nice if emc could idle down the motors, but it can't
12V (the value written on the motor casing) but with two windings on at a time
you can I dont know the exact numberrs but can really toss the voltage at them
I also don't know if that's 12V in bipolar or unipolar operation
oh, that would be a big difference wouldn't it
surely it's unipolar
they can run safely hot enough to burn after a few seconds of touching
they are built that way
that would make me really nervous, but I agree I have read that most steppers can get pretty hot
I dunno, not so hot there's any discomfort in touching them. They're just nice and warm
after being on an hour? that's perfectly fine
try em at 24v if you can
they wont be eating so much current at that v
gezr: my driver board is too simple for that. No chopper or anthing
ULN2803, a simple darlington driver chip
you can still toss v at it, v comes into the motor, and the chip opens the gate right?
do your chips get hot as well?
the parts cost for the board is somewhat under $10, I think
the chips get a little bit warm .. I think I calculated that they dissipate ~1W each
you need a nice close-up photo of the board while it's still shiny
those darlingtons can sink a bunch of current too
you can also stress that it was made with emc
cradek: reload the page
there's a photo of the unpopulated board there
backlit, so you can't see how shiny the copper is but I still think it's nice
it looks sooooo cleanly cut
"It's a simple constant-voltage L/R drive. I made the circuit board using EAGLE, and milled it on my friend's real CNC machine."
(You can use my name)
it's perfectly made
a work of art
that is nice
"my Chris's ... machine"
I have to go do fun stuff like wash the dishes and feed the cats now. see you guys around.
your both in the same town?
you need free samples
they will send you like 6 free
Im trying to remember
they are nice stepper chips :)
I was reading about some of their chips today. I think they're what the xylotex boards are based on.
and you found that you can't buy them anywhere, right?
I need to order some more
you get them directly from alegro
I may have 2 extra
i roasted one on accident
oh one more thing, do you have a good huge resistor between the motor and its input V?
your probably gone, I shouldnt try and keepyou,
cradek : maybe you know if he does?
that will also cut the heat down
no, he's not using L/4R drive, just simple switching with V= the motor rating
the design is entirely as basic as possible while still working
all very cool
those were the design criteria: working, cheap, simple (in about that order)
so what is yoru hobby the machining or the computing?
I have more hobbies than anyone should
im either just starting off or too far behind, I hope you havent given up on the motion stuff yet
I am an ok amateur machinist, an ok programmer, an ok musician, an ok lots of other things.
no, I just got home too late to work on it tonight. I'll work on it at least a little bit more, and if I can't figure out exactly what's up, I'll band-aid it so it runs until someone smarter looks at it.
I work as a machinist, ive always loved computers and programing, just never really learned much as far as programing
sounds like a great opportunity to learn something new
as long as I dont start thinking im asking stupid stuff like i used to get into
I also fix mechanical watches (it is probably what got me into miniature machine work) and antique radios
I like to work on cars some
I have a good friend with a drinking problem who does the antique radios thing or did, he has a full blown shop now dedicated to machining
well I shouldnt say that about him, I dont spend enough time with the guy, he is really fun
I enjoy it. It's nice to restore old things that have quality we don't have now.
(it's the same with watches)
Ijust want to make extremely cheap machine tools for home use that dont have to travel on a boat to get to a us destination
that would be nice.
maxnc is pretty cheap... It would be hard to beat them
the earlier talk about different castings moved things up a bit
I go to a localharbor frieght fromtime to time, they have that 400$ mill, and all I can think at that moment is what I would want to make myself
ive worked on some really nice machines
what $400 mill is this?
the designe I have in my head now, can be set up to be, a hobb, 3 axis mill, 4 axis mill, 5 axis mill, vertical lathe
and would look good, on a dinner table
oh, let me find a link, I thik grizzly sells one as well
[04:11:15] <gezr> http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=47158
for small stuff I like my Sherline equipment
my bad 300$
its not bad, its not what I need though
my current fettish, is gear cutting
that's a very cute machine
I wonder if you could start with it and make something useful
i bet I could
I wonder what the spindle bearings are like
it might just be a cheap drill press not made for side pressure
doesn't say if it uses acme threads
there are lots of articles on the web about those size machines, its 50% on thumbs up and thumbs down
lots of articles on mods for them as well, Im pretty sure they use acme threads
but i think its metric stuff graduated in inch
you mean the lead screws are metric thread?
I think so
but the handwheels are graduated in inches
you move the crank .001 inch, it moves .001 inch,
but the accual thread is a metric pitch
its been a while since I really specked one out
that doesn't make sense... what would the markings on the wheels look like?
I dont think they go to 100 or 200 divisions, its more like 120/rev
[04:21:56] <gezr> http://www.mini-lathe.com/Mini_mill/Main/mini-mill.htm
[04:22:26] <gezr> http://www.mini-lathe.com/Mini_mill/Features/features.htm#Graduations
there it is
oh okay its not a metric thread, but not a 10 pitch, heck it may be a metric thread
0625/rev is insane
sorta strange hu?
all those mills are farm raised,and sold to whom ever
they arnt bad
screws can be replaced, and the likes, many modifications on that page are shown
they have heaver machiens as well
[04:27:02] <gezr> http://www.monarchmt.com/PMC.htm
is what I want to build,in baby form
ive accually ran that machine
oops, it's time for bed here
ill probably never make it