theorb is now known as theorbtwo
Jymmm: >>> you literally dragged it? Part of the ways.. I used pipe rollers where I could but in a few instances .. it was dragged with a come along... the hard way to do it..
jthornton:..... You made that look easy! Nice to have all of that blocking handy.. You've obviously done that before! :-) Still.. that is a lot of work going back and forth moving all of that stuff around
[02:22:13] <L84Supper> http://cgi.ebay.com/2-axis-cnc-lathe-/300463043839?pt=LH_DefaultDomain_0&hash=item45f4fe34ff
still holds to 0.001", not a bad deal
hmm. i've drawn out the schematic of our lasercutter high voltage board
[02:51:05] <roh> http://yamato.hyte.de/tmp/high-voltage_driver-board.pdf
anybody seen something like that before?
it's a boost type switcher
jthornton: yay, looks like it's at ground level, congrats
jthornton: looks like a very easy fit through the door
roh: are you trying to fix it?
roh: And what did you draw it in?
L84Supper nope... well.. the laser does strange things sometimes. next will be checking out the cables, which pins of CH3 the a) ampmeter, b) current-pot. and c) 'test fire button' and d) the link from the controller-board is connected
KimK thats eagle
OK, thanks. Free or paid? How recent or what version?
also its after like 10 revisions ;) after untangling. its a single-layer board done in china. i first placed all parts on the sheet like on the pcb, and the connected them, after that i started shuffling everything around
the free one. some 5.x version on linux
5.6 is what i used
C16 is funny. according to the datasheet of the IR2110 its dangling in the air (pin8 is not connected)
roh: might be from an earlier rev of the part
i did that reversing for 2 things: i want to understand what i need to send in there, so i could retrofit it with emc later, and i want to know if something weird on it is causing the strange 'flame-out' effects we get
the laser just 'looses power' in midst cutting, but the 'ampmeter' still shows something. happens if one uses 'too much' power in the beginning after some 60 seconds runtime. cooling water isnt hot, and a fan on the mosfets did nothing.
roh: OK, thanks. I have considered Eagle from time to time. I've also recently loaded a bunch of gEDA stuff (available in Synaptic on ubuntu 10.04), but haven't had a chance to play with it much yet.
i guess that varistor (R20) is the overvoltage-'protection' and the relay with the triac-diodes-pot combo trys to be a overcurrent protection.
geda is nice, but it crashed once to often and annoyed me there
what does one controll on laser-drivers? frequency? pulse-length? or both?
roh: I suppose the CH1 1-3 is the incoming Line, Earth (not shown?), Neutral. But what is the CH2 1-3 over by the drivers?
CH2 is where 2 wires to some hv-cascade or similar is connected.
it looks like 2 line-transformers from a tv
roh: what's the final HV Voltage?
eh.. i dunno the english word. 'zeilentraffo'. the thing generating the high voltage.
L84Supper if i knew ;) its a chinese make, about 80cm long co2 tube.
And it is a two-wire inductance of some kind?
i guess so. its 2 'transformer like thingies' on a board, and a really fat resistor in series to the laser-tube
guessing from the isolation i'd say about 6-10kv?
thingies as in ferrite core? As opposed to iron core, I mean?
roh: what's the switching frequency?
L84Supper havent measured yet. i wanted to know what would happen to my scope before fiddeling in chinese high-voltage stuff
got no tools for measuring 4digit voltages
roh: without a HV probe your scopes voltage protection would be cooked
roh: You have a tounge, that's shoul dbe good enough
heh.... get a cheap HV probe for CRT's
guessing from the caps they use its 'below 2000V' on this board ;)
they probably charge pump after this circuit
Just make a coil (1-2) turns of wire and put it from your probe to probe's ground clip and bring it within maybe 6" of the coil. Not too close. Don't connect to any part of the circuit.
Especially not "ground"(?), lol!
first i will untangle the cables and find out where the 47k pot on the frontpanel, the amp-meter and the firebutton are connected. the controllerboard is on pins 1 and 2 of CH3 afaik
it would be really nice if i could replace the sucky pot on the front with a endless-dial and control the current with an avr for now. its nearly impossible to manually 'reproduce' the same ampage 2 times. exactly
10 turn pot?
it also drifts
Well, it might not be "drift" as much as load change
roh: How many watts is your laser? And what gas type? (Sorry if you said this earlier, I missed it)
hm.. not that i'd noticed... atleast it doesnt make a difference what material i cut
KimK its a supposedly 50W co2
Oh, CO2, there it is. Looking for the wattage now...
i think its more like 30W and since it makes trouble if i do runs with more than '0.5A' (whatever the scale means) we use it on low settings a lot.
[03:21:38] <roh> https://m21.hyte.de/wiki/LaserCutter
[03:21:57] <roh> http://camgeeks.de/maschinen/
on the bottom
So I'm guessing "0.5A" means 50% of some unspecified current?
the scale goes up to 3A
the volt-meter is connected directly behind the fuse, before even the powerswitch. so you see if the machine is plugged %-)
roh: Find the currnet shunt and you'll know
there is no shunt. afaik its connected to CH3 somehow
I have NFC what "CH3" is
Channel 3 ?
Really? 1/2 A seems like quite a bit of current for a 30 to 50 W gas tube. It must have a pretty low "on" voltage. Lower than I would have guessed, anyway.
the 88pin connector on the schematic
roh: I'm too lazy to look
KimK i dont believe the scale a bit.
roh: any bg fat resistors in there?
on the board which connects the tube to this one, is one series-resistor.
but its in series to the laser-tube and not connected to anything but the high-voltage transformers
that's not it
do keep in mind the wattages are output wattages not draw
on lasers generally
Jymmm: Your earlier comment reminds me of a joke I heard lately. Little Billy wasn't paying attention in arithmetic class, and the teacher got annoyed: "Billy! What's 2 and 4 and 8 and 22!" Billy answered, "ABC, NBC, Fox, and The Cartoon Network."
somehow this thing still creeps me out. i'm a certified tv and communication electronics technician (3 years of learning), but that board is really on the edge
i still wonder that it doesnt generate sparks. its less than a cm of space between some parts of the 'output', which is much less than whats needed to be 'safe by regulation' ;)
roh: pics of the board?
below it there is a second pcb-like epoxy board, to insulate it against the case
roh: blink three times if yout gaged
* KimK thinks it's either a gang of home invaders or "text-speak" for "moment please"?
roh: are pins 2 and 3 really connected to each other on OK2?
KimK: I vote is for hoem invader midgets
or that the isolation bypass? :)
<small_font>"Follow the yellow brick road! And give us all your money!"</small_font>
[03:34:34] <roh> http://yamato.hyte.de/tmp/laser_hv-board_back.jpg
[03:34:39] <roh> http://yamato.hyte.de/tmp/laser_hv-board_front.jpg
that looks like a lo voltage board. two bridges
maybe pwm board
yeah, no HV other than the rectified 220VAC
whats behind the heatsinks?
[03:38:17] <roh> http://yamato.hyte.de/tmp/laser_hv-board_mounted.jpg
Jymmm check the schematics. its all in there. 2 IRFP460
500V Single N-Channel HEXFET Power MOSFET
Have you got a pix of the inductor it drives? On the machine is OK, if it's attached. Excellent, you anticipated me again, thanks. So the red wire and the "resistor wire" go to the laser tube?
roh: all the data sheets are there, run the numbers with the values given....
roh: substitute a load for the laser tube and see what it does
whats the value of the resistor? I think that's a 50W resistor too
and where does that grey wire lead to?
mendel|failure is now known as mendelbuild
I can't see how the flybacks are connected to the controller board.
the green wires connect the 'hv-transformer-board' to the board i drew the schematic of.
cradek: parents with little spoiled girls
the yellow and the red wire connect the transformerboard to the lasertube
roh: Hi res photos next time please =)
ch2 connects to the HV stepup
any ozone smell?
you can test the regulator with a substitute load for the transformers and laser tube
nope. not that i noticed.
L84Supper nope. dont have loads, or a clue about the spec of these transformers. i got no documentation i havent written myself
roh: This is what happens if you are running a job on your laser and go pee http://i34.tinypic.com/eldwly.jpg
uha... something went really wrong
roh: close up http://i37.tinypic.com/sqh6r7.jpg
somebody is gonna be in the shit
roh: NEVER WALK AWAY FROM THE LASER EVER
Hit pause, but never walk away
looks like it burned really hot
I though it was a photocopier
That is a laser engraver, they guy was gone 3 minutes to pee
we are always near the machines. not exactly infront of it, but not more than seconds away.
also i never leave it doing someting i havent done while watching it.
roh: Well it looks like you have yours in a cubby hole
is that a fashion velor fireproof jumpsuit?
not fireproof. sadly
No, that's the gal that's out $30,000
* roh uses cotton jumpsuits repurposed from germany army surplus. really tough textiles. saved me from some harm already while biking
I wanted to make up some kevlar clothing, but its impossible to find in a tight weave
its all rather coarse for doing fiberglassing etc with
My first laser engraving http://i38.tinypic.com/1zvyafo.jpg
reverse carved on clear acrylic
now this looks interesting: http://en.wikipedia.org/wiki/Laser_cladding
A little expensive for prototyping but looks like the same concept(only with a laser).
Jymmm: you should try it ;)
Jymmm: were your hands over you head in that pic or does your face not have a reflection? :)
L84Supper: no reflection
he is a vampire...
heh... about retrofitting our machine: i would completely swap the controllerboard, which also houses the 2 stepper drivers. will my parport be fast enough for the speeds one needs on a laser? or should i start asking for help funding a mesa board to connect to the parport in my hackspace?
I never realized that vampire things was only for faces
elmo40: I sorta been thinking about it, but the "additive" part I can't figure out
L84Supper: it's not
But right now, before I do anything, I need to figure out the air scrubber sound prooofing box
I need to figure out what "clamps" to use to hold on the lid
36" x 14" apx
roh: up until the series resistor it's a ~220V oscillator
roh: B2 is used for regulation
well feedback for the regulator
L84Supper its just hard cap
no real regulation
also i havent seen the relay do anything yet. need to check if thats also true when it 'flames out'
I got in contact with these guys http://www.synrad.com/vseries/v40.htm
about that laser. told them I wanted to make an interchangeable router/laser machine (swap it out for either head) and they said many people have tried with bad luck. they talked about the laser getting all 'dusty' causing poor performance. I think the guy was thinking a two-in-one machine, at the same time.
when that effect happens its 'not cutting anymore' and seems to become 'unfocused' .. very weird
Jymmm: I think the additive is powdered metal.
there is a seminar on it I wasn't to attend. http://www.reseaumateriauxquebec.ca/LaserCladding/index.html
too bad it is a 3.5hr drive :/
*I want to
[04:08:57] <L84Supper> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220663831119&ssPageName=STRK:MEBIDX:IT
says CNC but it looks like only DRO
now this is a geeks dream toy! http://www.open-pandora.org/index.php
[04:42:23] <L84Supper> http://cgi.ebay.com/MORI-SEIKI-AL-2-CNC-LATHE-/150487667725?pt=BI_Lathes&hash=item2309c3940d
is that an iron oxide finish? :)
not as slick :)
How to you put a delay on a DC line?
Jymmm: what are you trying to delay?
or is this a trick question :)
two bulbs in parallel, and I want one bulb to light slightly before the other
maybe 2ms delay
wait, will that just delay the DC in the tank?
or reduce it?
well, I guess I really should ask whats driving the circuit
and is the lamp the only load?
well two of em
could I just wrap wire around the resistor for the inductor?
I'm assuming parallel
crude but sure
how many turns?
were talking 24ga wire
rc + transistor switch
all passive baby!
two relays, one with a tighter return sprint than the other
no relays =)
or a DP with one contact further apart than the other :)
* Jymmm smacks L84Supper with tube tester
One of the drug store sized!
the rc circuit will also keep the lamp lit form longer than the other
It's really two flashing RGB LED's and I don't want them flashing in tandem =)
really really long delay line..... hmm 2ms at 0.5C (c=speed of light) = 300Km
L84Supper: Actually, I DO have that. but it's fiber optic.
~450Km using coax RG59 or similar
L84Supper: No, really. I DO have a fiber optice delay line.
L84Supper: they use special fiber for delays
slow propagation materials
What am I disagreeing to?
'I came in here for an argument and all you do is contradict me"
alex_joni: 30KM of fiber ~= 200mS delay
Jymmm: they use optical delay lines in opti-switches
gotta delay the signal until you decode it and prepare the mirror ahead for the right position
alex_joni: This was in laser modules used in analog telementry
alex_joni: ie remote antennas in the desert, receiver 30KM away
guess it depends on the fiber
or for mountina top cell sites
I have from here: 28msec to amsterdam
160 msec to across the ocean
surely a lot more than 30km :P
Well, the stuff we made was analog. Some are used at a reference inside HP T/E
alex_joni: $50,000 USD calibration reference =)
and never dropped it either =)
My linux kernel patch against 188.8.131.52 fixed the conflicting types but now rtai userspace won't compile: http://pastebin.com/TtPfyiGi
Trade one broken thing for another. http://pastebin.com/zKEPptpP
[06:59:51] <alex_joni> http://failblog.org/2010/09/06/epic-fail-photos-genuine-fail/
NTU: you'll probably have more success asking on the RTAI mailing list
OK Thanks, I'll subscribe and ask there.
btw, how's your laser working?
that's a cool idea
Yeah, I thoguht so.
did any engravings yet?
alex_joni: I haven't really touched it lately. I've been focusing on designing an air scrubber/sound proof enclosure for the dust collector.
[07:16:03] <Jymmm> http://i38.tinypic.com/1zvyafo.jpg
alex_joni: I'm trying to make the enclosure fit under the laser (on the legs) so that I can jsut roll aorund both if I need too. http://www.engraversnetwork.com/uls/m300.html
alex_joni: I *think* I found some material I can use for sound proofin without worrying about sparks from the brush motor of the DC
alex_joni: Last few days I've just been doing a lot of reading on acustics, soundproofing, and materials.
alex_joni: I did find one sheet material, but in stamped on is "May ignite if in contact with sparks"
Birdman3131 is now known as birdman3131|zzzz
alex_joni: That is reverse carved on clear acrylic
thanks, my first engraving =)
Thought I was going to have to buy a new tube initially, but between drivers, settings, and sitting for 5+ years all it needed was some tweeking.
here's something that could be useful for cutting-simulation: http://arxiv.org/abs/1009.0794
So far, I've only had to replace the gas springs for the lid and got lucky to get those for $23 for the pair shipped.
I feel very fortunant to get it.
that's their idea of machining...
somebody was talking about running their laser cutter off EMC, I'm not sure if its the best idea
some have, especially when the controller was dead
Valen: what were you thinking?
I have two co2 lasers here (1.5kW and 1kW)
micges_work: bite me
sorry not cutters engravers
things that operate in a raster mode
and I've retroffited 5 :D
because EMC cant change the laser power output fast enough
via paraport you mean?
the problem is changing the "spindle speed" resets the motion planner
how about making laser intensity Z?
or some other axis
yah, the problem is it causes a tiny hickup
that was my suggestion
DaViruz_: You need the PWM to control the laser
you could do it
it was talked about in here before
there are 2 things
vary the step pulse
usign a laser for vector stuff (turn laser on, move, turn off)
and use it as a raster
for raster the current emc2 solutions aren't good
but there have been proposed sollutions, which nobody cared to implement yet
Um *MY* laser is NEVER 100% dudty cycle. It's PPI max is 1500
what was the reason you couldn't use an axis for laser power output?
the gcode wasn't pretty
alex_joni: what soultions? I don't remember..
To do the engraving above I did 750 PPI
micges_work: create a component which takes a 2D array
but that was raster
it gets fed from userspace (like hal_streamer)
alex_joni: ah yes
and you set start/end for lines
then while emc2 is moving in straight lines, the component outputs on/off, laser power, whatnot
you can also do antialiasing and whatever you find interesting to implement
that was the problem with using an axis, the guy doing it was using parallel port output
he needed PWM output to run his laser
you can do 15-20kHz on a parport pretty easily
that surely is enough for laser PWM
he was using spindle PWM output to controll his laser power
well, as everyone said (a gazillion times) that won't work
yeah but can you get PWM out for an axis on parrport?
you can get PWM out on parport.. no axis needed
pwmgen -> parport
then you can just change pwmgen parameters (frequency, duty-cycle, whatnot)
you can even do PDM which is probably better for this
If i'm being irritating let me know, i think i'm having a bit of a reaction to some antibiotics at the moment
nah, it's fine
feels like i'm 2 beers infront of everybody else, except i dont drink
I think the other reason for using an axis was it meant not having to change anything in the internals of EMC
Valen: Sure you didnt mix up the antibiotics with vicodin =)
thats the thing i stopped taking the pain killers yesterday
(got 2 wisdom teeth out)
Valen: Well, maybe you did mix them up?
nah, very different
one of the antibiotics is fairly potent though
thats the light weight one
the active thing is metronidazole
think i'm getting better now
just a bit giddy
anyway, what do you guys think about sticking something like a 10-30W IR LED module onto a mill to do some lightweight sheet cutting?
or would we be better off with a plasma cutter
[07:59:29] <Jymmm> http://www.medicinenet.com/metronidazole-oral/article.htm
Valen: drink lots of water
Valen: It seems it has some funky interaction with the liver.
yeah, which would have done wonders with the panadine forte they had me on as well
you taking blood thinners?
nah its nothing too bad, just a little dizzy, only got 2 more of them anyway
drink a lot of water though.
i normally do, but its been down quite a bit with the not wanting to open the mouth think lol
usually I'd drink 3L or more a day ;->
(we have some really really big glasses, 1L per glass)
might go have a drink ;->
Valen: get a straw
nah cant use a straw
the sucking is bad
Valen: water or cranberry juice
water is good enough for me, kidneys are doing enough work at the moment
the vitamin C is a good thing, plus the cranberry good for liver
and may easy the dizziness too
use a IV bag
and let it drip into your mouth :P
maccas thickshakes were good
drinking em without the straw
what was weird is they tasted hot
heh getting back onto real food
but initally my "standard meal" was 2 cheeze burgers and a fillet o fish
took me an hour to eat lunch
thing that shits me is its not the teeth that hurt
its the freekin stiches
they go half way up my cheek
vicoden to the rescue
nah trying to stay off that stuff
didn't seem to do much anyway
did you get your package yet?
skunkworks: How the hell are ya?
hanging in there.
skunkworks: Will check today or tomorrow.
Jymmm: did you see http://www.youtube.com/watch?v=QU_O_Z7Vv8c
skunkworks: Still have that STD?
more than one!
I think I finally got rid of it.
skunkworks: Ah, very cool! You and your 1" acme ;)
oh yah - You saw it ;)
skunkworks: Oh, your one of those that have 39 STD that dont have names yet!
skunkworks: It's all good, I do that all the time when I'm excited about something
Just wait till I get this air scubber completed
skunkworks: I just found out that audacity have a freq analysis plot feature. So I'm going to try and use that for reference in sound absorbtion
At least it'll give me an idea at what freqs I am attenuating
skunkworks: I'm taking a big guess at the material I found is the right stuff for the job. I'm just running out of time
[13:21:57] <Jymmm> http://sfbay.craigslist.org/sby/tls/1940213970.html
With all the thought you have put into it - I am sure it will work great
Thanks for the confidence, but like I said I'm taking a big guess in hoping (fingers crossed) that these recycled rubber floor mats will attenuate the dust collector.
They have the right pattern on them, heavy, yet soft, and since recycled they are "mooshed" together so fairly porus (but can rip easily)
only about 1/4" thick or so, so we'll see if that's enough or if I need to double them up.
I did find some sound deadening material, but I fear that if I use it might be a fire/explosion hazard.
it go boom
you WILL get addicted! http://numptyphysics.garage.maemo.org/
Uber fun game.
Well, in an enclosed contianer with a brushed motor that sparks and stamped on each sheet it says "Spark or ignition source may cause fire hazard" that's 18" tall, I take it to heart.
its says 'may cause' not 'will cause'
moopy: "Must be made fire retardant" to use
Unable to do that in this case. Will be in an enclosed area, with dust particals and an burshed motor.
birdman3131|zzzz is now known as Birdman3131
* JT-Work closed the garage door with the 308 inside this morning
Did you just move the garage instead of the 308?
what a relief when the machine is at ground level and inside
who said anything abut ground level? I think he just dug a ditch and it's actually BELOW ground level, but in the garage =)
He does have that hackhow ya know =)
yes, it went very smooth this morning took about an hour to set up everything then about 5 minutes to push it in
I even took a picture of the garage door going down with the 308 inside :)
Jymmm: what is a hackhow?
JT-Work: You would know it better as " tu dolla sucky sucky"
JT-Work: How much clearance did you have at the garage door?
about 4 inches in height and 18 on each side
yes, and I was able push it almost all the way to it's temp resting spot
ries_ is now known as ries
push or comealong it?
JT-Work: So, how does it feel to be the 6000+ lb movin, beer drinkin, nap takin, bbq makin, one man superman?
JT-Work: good job btw
I used the backhoe to push it into the garage with my other brother John watching and flagging
it's surprising how well 2x4s work as skis
they were actually 1 x 8 or so
once I got them moving they slid pretty easy for having 6k on them
like they had a choice in the matter
If I made a box where the bottom is sorts like the brim of a tophat, is that putting excessive stress on the "tabs" to hold the entire weight?
not if the material is strong enough to hold the weight
5/8 or 3/4 MDF 36" long
That tabs themselves would be 2"
are you going to through bolt the tabs with carriage bolts?
back from getting coffee...
You mean like mounting bolts? I wasn't planning on it, but I guess I could drill two or thee holes.
JT-Work: I'm building a box to fit *ON* the legs under the laser... http://www.engraversnetwork.com/uls/m300.html
larger pic http://www.engraversnetwork.com/uls/iimages/m300_big.jpg
JT-Work: The legs on the laser would break some bones if dropped on a foot
2x3" steel tubing
I can't visualize what your building in my head...
Ok, gimme a few to sketch up something.... not gonna be pretty though
JT-Work: I hope this makes sense... http://i51.tinypic.com/281g6eh.jpg
JT-Work: the "blue" is the bottom of the box with the tabs the sit on the legs of the laser.
yea, that makes sense to me
JT-Work: the red dashed line is the box the is sitting recesed in the the legs
is the box open on the bottom?
No, it will be opened on the front
just make the bottom the width needed and attach the sides to that
the whole front panel will be removable
I could double the side walls, that would give an added 3/4" tab support per side
1.5" thick side walls
I'm getting ready to EMC'ify a reprap machine, and am wondering how I'd configure the extruder "axis". Guessing something similar to the setup of a CNC wirefeed welder, is that a good approach?
I guess you want the extruder either on or off. when it's on the axis movement should be proportional to the distance travelled in xy ?
it's a stepper driven extuder, so it actually get's fed g-code where the 'coordinate' increments in coordination with the desired extrusion amount/speed.
same as a wirefeed welder would, I'm assuming.
* bill20r3 has never actually seen of a cnc wirefeed welder.
stepgen in velocity mode? you would tell it to despence at a rate. maybe
well, you tell it an amount, so like "G1 X10.0 Y10.0 E5.0" would move from the current location to 10,10, and dispense 5mm of extrusion along the way.
I'm more wondering about how emc/axis would handle/visualize such an axis.
e5.0 is the speed of the motor? akin to the RPM of a spindle?
but it is a stepper... make it a 4th axis and figure out the pulses/rev and such.
E5.0 is the amount of extrusion to spit out. equivalent to "use 5mm of welding wire"
or consume 5mm of plastic wire?
so if you had it for 10.0 it would consume 10mm of wire in the same distance?
and you'd end up with a 'fatter' deposition of plastic.
then it is like a 4th axis. should be simple enough. you could program it to be A and give it the correct setup in stepconf
ok. sounds like I'm only complicating it in my head.
do you know if Axis can be set up to visualize that 4th axis in an arbitrary manner? like faster-extrusion is drawn with a darker color?
in my mind EMC could view it as a 4th axis. Unless it complicates things with Axis and it rotates the whole part... maybe another stepper function is required. Would the PLC give step commands?
sounds like inverse time... gimme 10 mL hot glue while moving 7mm in X and 4 mm in y, begin & end at same time
yes, that's an accurate description of the setup I'm after.
although the "E"(extrusion value) is currently a relative number, to minimize accumulated round-off error. (it resets periodically, at each "Z" move, btw.)
yes, all motion would be relative. useful for 'end of glue' maybe. configure it as an axis , dont try to interpolate it, just ONLY use inverse time when you want gluing. the trouble/benefit is the other axis moe slowly to accomodate the glue in that mode. Dont use that mode for positioning, only gluing.
ok, I think I understand.
how about setting up a FIFO or FIFO's with values for E, (E might = laser power, fluid pressure, ink volume etc) that gets clocked by the axis it's needed in?
Btw, "E" may be reversed, too. Sometimes you want to roll-back the extrusion feedstock a bit to avoid ooze.
dont try to use EMC2 for any reverse. use HAL or rewrite EMC's traj planner (enforces next is fwd along path ) . there aint no reverse gear in EMC2
Is the basic difference between a LINEAR and an ANGULAR axis that the angular axis values wrap around, but linear axiss have stops at each end?
bill20r3: no, there are no real differences
you can have wraparound rotary axes, but only recently, and you need some special config incantations for that
aj, more of a pointer for Axis to know how to visualize it?
Can anyone recommend an electronic edge finder that can approach a part from above without breaking (Z axis approach).
That way I can take my time hooking up the probe
bill20r3: not sure I understand what you're asking
ichudov: how about just mount a cheapie dial indicator in a tool holder?
alex_joni, I was asking if the ini file configuration value for axis type (angular|linear) is used by the Axis GUI to know how to visualize that axis.
ichudov: or what I do: just roll a dowel pin under the tool while slowly lifting it with the jog wheel
bill20r3: angular/linear in the ini file are not used for anything, they are a historical oddity
bill20r3: XYZ, UVW are linear. ABC are angular.
are those enforced types, or just by convention?
the answer to that is probably "it depends" unless you give more information. one difference is that xyzuvw change units with g20/g21, and abc don't because they are not ever inches OR mm
I'm not really sure how to answer your questions
there's nothing to say you can't hook up something linear as B, but it'll be goofy with respect to units and feed rates etc
I mean, in terms of EMC2 config files, if axis types are tied to the name(letter), or if it's just "the usual names" that axis's are given.
ok, so they're usual-names, they don't have any magical meaning in terms of emc configs.
in EMC xyzabcuvw are the names of the 9 axes. you can't call them anything else.
believe it or not, I've actually used emc before, but it was a textbook x/y/z mill, so I didn't have to learn much about the config details.
has anyone got an idea what 'Exceeded negative soft limit on joint 0' means in axis???
has anyone got an idea what 'Exceeded negative soft limit on joint 0' means in axis???
uhm, I'd guess just what is says.
there's a setting for soft-limit, the point of "never move past here", and you moved past there.
but the position is well between my MAX_LIMIT and MIN_LIMIT ini params
I thnink the soft limits are different settings, perhaps they dont match.
do you know what the parameternames are to define in the ini file?
not offhand, but I saw it recently, sec.
hmm, no luck, maybe the answer is in here: http://wiki.linuxcnc.org/emcinfo.pl?Homing_And_Limit_Switch
cradek: great idea about dial indicator.
have any of you guys played with induction furnaces?