theorb is now known as theorbtwo
got an odd problem with tuning on our mill
i do a G1 F100 and tune FF1 to zero out the error during cruise
if i then do a G1 F200 the error is back and bigger
basically i can tweak it to hover around 0 error at a specific feed rate with FF1, but as i change speeds the constant for FF1 seems like it should change
wondering what i'm doing wrong
Hey guys, noob here, I'm trying to design my CNC machine. According to forums and other internet sites, I shouldn't run more than 1.75A per phase. The controller is rated 3A, 3.5A Max.
My question is does my controller mean 3A per phase?
I thought it meant 3A per phase,
or is it supposed to add together and I just misunderstood?
My controller is here:
[02:13:25] <PartScavenger> http://cgi.ebay.com/New-3-Axis-Stepper-Motor-Driver-Board-Controller-TB6560-/230494686336?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item35aa8dcc80
It's a cheap chinese
PartScavenger, there are three of the actual driver chips on that, correct?
probably three chips under the big alum heatsink?
yeah, looks like it
so I would think that each axis will get 3A per axis
yeah, they call for a 8A PSU
Yes three of the acutal chips
I saw several people recommend that you don't run over 1.75A per phase,
so I would think that with that 8A PSU you are going to get ~2.6A out per axis, minus energy losses
PartScavenger, 1.75A per phase of your steppers?
So that means 3.5A per axis right?
I'm looking at a 3A stepper then?
you know, I am not entirely sure
I would think that you would split the current in half, but it could be pulsing one and then the other?
* alex_chally is not an EE
[02:28:08] <PartScavenger> http://www.kelinginc.net/KL23H286-20-8B.pdf
Hehe, nor am I. ;)
...was the stepper I was planning to run with the said driver.
PartScavenger, take a look at page 5 of the datasheet
that is linked on the ebay page
it looks like there are two resistors, TQ1 and TQ2 that allow you to adjust the current output as a percentage of the whole
er, just pins
I would be money that those DIP switches right next to the heatsink are the controls for those pins
I would be money too, coz I would have bet some money and won it
LOL, You'd be right about the DIP switches I have seen them used on the internet to control the current.
PartScavenger, in fact, item 6 on that list "Calculation of the predefined output current" seems aplicable too
if only all of life's problems were so easily solved :D
PartScavenger, honestly the real answer is that you should totally go balls out on those
keep an eye on the temps of the motors
and you should be fine
but I am almost sure you can dump a bunch of current into those and have everything be fine
It's not the motor's I'm worried about, it's this:
[02:39:45] <PartScavenger> http://www.mycncuk.com/forums/showthread.php?1373-eBay-TB6560-Stepper-Motor-Driver-Boards/page3
Scroll mid page. =P
PartScavenger, so this is the part where he fucked up
This board is ment to be rated upto 36vdc, So I tried using my 36vdc 10A PSU.
is the quote
if you overvolt those chips you MUST have a current limited PSU
yeah, if you look at the datasheet for the drivers, they have a 3.5A max
which means without a current limiting PSU
So I guess it was unregulated and the voltage got too high,
cause if you look at the spec sheets on some of the chips,
he could only put a load of 10.2 ohms on that before it would blow it up
Voltage Max is 35V
so we have 36V=3.5A*R
in other words, having a current limited variable voltage bench PSU is awesome :D
PartScavenger, man, if I were designing that board I would have put the drivers in sockets
* alex_chally has a bag of dead easysteppers somewhere
archivist: what was the picture for? you need to machine something? (IMG_0754.JPG)
elmo40, yup, may need to make a set of gears
I've the bad feeling that I don't receive some of the ems-users emails. I sent one yesterday, don't received it. Is there a way to understat what happens ?
what was it about
classicladder / sequential editor
I'm looking in the list archive, it does not appear
I'm pretty sure there is a bug in the sequential editor that prevent using some functions
@alex_chally Thanks so much for the help! Please forgive my manners, they were passing out chocolate cake, and I got distracted... :)
got an odd problem with tuning on our mill, i do a G1 F100 and tune FF1 to zero out the error during cruise, if i then do a G1 F200 the error is back and bigger, basically i can tweak it to hover around 0 error at a specific feed rate with FF1, but as i change speeds the constant for FF1 seems like it should change, wondering what i'm doing wrong
[08:01:51] <alex_chally> http://www.machineryforsale.com/images/TPC081276_Tahl%20Gap%20Bed%20Lathe.jpg
oh holy crap
I want a ride on toolpost
I wonder what Depth of cut they are taking....
that thing has a 230" swing
that is... 19 feet
and a bit
Valen, basicly tuning out at one speed takes little note of resonance, being critically damped at speed 1 and then running into overshoot at 2 so tune nearer to 2 or all over
tune the acceleration and stopping more than cruise
the acceleration etc is fine
I am just trying to null out the fixed offset
darren is now known as redwizard-kde
[12:37:50] <jthornton> http://cgi.ebay.com/Hitachi-CNC-Ruffer-Mill-EMC2-Servo-Retrofit-/330446805833?cmd=ViewItem&pt=BI_Mills&hash=item4cf02a1b49
heh gotta like tux appearing on ebay
you get your servos tuned up?
though a laptop
no, no idea what the problem is really
FF0 is position, FF1 is speed and FF2 is acceleration
its like I want FF1 to have an exponent or something
I "think" I only used P I and FF1 to tune the lathe... I could check in a bit when I go outside
thats all your sposed to need
I added a little FF2 to help it start and stop
[#emc] "This is the #emc channel - talk related to the Enhanced Machine Controller and general machining. Website: http://www.linuxcnc.org/,
wiki at http://wiki.linuxcnc.org/"
crash occurs on line 23 on my pastebin
the error on line 22 is at starting.
bricofoy: you have emc from package?
micges, from mozmck experimental package
weird, I don't even have a print button
I'm installing some packages and rebuilding (a guess)
inifile: warning: File contains DOS-style line endings.
you ought to fix your ini file and then never edit it on a windows machine again
I never edited it on a window machine, I don't understant where does this error comes from
I have only linux box in there
edited this file only with Gedit
did you do anything special to get print preview to crash? it works for me
[17:00:57] <bricofoy> http://imagebin.ca/view/kG0Siw.html
this is what my classic ladder looks like
nope, just "print" then select "print preview" or "print" in the printer selection window.
but seems to work for smaller design, when I do the same on another section, it works
hm, that works here
I can pastebin my .clp file if you want to try with it ?
worth a try
[17:04:51] <bricofoy> http://filebin.ca/wpqzkr/custom.clp
there it is
[17:07:39] <cradek> http://timeguy.com/cradek-files/emc/Screenshot-classicladder-preview.png
yeah for this section works ok for me
but try the same on the "sequential" section
ok, enjoy your meal
Got a question about a parport card -
someone will reply ;)
It's a MCS9865 chipset card sold by Manhattan made in China as the name would imply. :(
Installation instructions don't work, not even close.
on a side note...
i took a look at http://www.orchestracontrol.com/
Ran the liveCD they have. Not too impressed.
i tried running things and they crashed
or needed a login/passwrd to get in
i couldnt even locate the CNC module. No clue what they are trying to do with this software.
back in a couple minutes
yey it works =)
all axis work perfectly =)
so the mill is once again "whole" :P
OK The linux driver instructions don't work. My question is, do I really need the driver installed in order to use the card? Or does anyone know of a driver and installation instructions that will work? It should be pretty generic I think.
no, you probably don't need a driver
if running emc2.4 it'll probably just show up in stepconf
cradek, did you try printing the sequential section of my clp file ?
cradek, when I do lspci -v I can see the card at something like $eob8 or some thing. But shouldn't the base address be $278 or $378?
cradek, because here the section you tried also work
OK. I have 2.3.3
bricofoy: I can't even switch to the sequential system to see it, without it crashing
davidf: you can use e0b8 in 2.3, or in 2.4 discovered parports get named like "1" and "2"
cradek, hu ! this is weird
Also I see a line with something like parport.1 OUT parport.2 IN
cradek, sorry I'm not at that computer - it's in the shop and not online.
Card doc says it handles epp modes etc. Can I set it for IN or OUT without driver software?
yes, hal_parport takes care of that for you
Awesome in fact. :)
It's getting harder to find PCI parallel cards. What happens when we can't get them?
I disagree with your premise, and also point out that there are PCI-E parallel port cards, and also point out that Mesa is currently making new PCI-E hardware in addition to all their other options
I stand corrected! Thanks
Search Terms: pci parallel port
(1-20 of 67 Results)
(a search on newegg.com)
OK I should check out Mesa.
mesa has a variety of awesome stuff that works nicely with emc
What's the url?
[18:41:25] <cradek> http://mesanet.com/
Thanks. When I said hard to find, I really meant at retail brick & mortar stores. It's pretty much all USB.
it's hard to find anything useful at those stores :-(
I'm much more likely to find what I need in my basement than a best buy store :-)
HA. I can see that.
I just find the words to explain why grafcet is interesting, and is complementary to ladder. Grafcet is a _simple_ way to implement state machines.
cradek, please (if you have time) try with this file : http://filebin.ca/wqbrzs/custom.clp
previous one had a design mistake, may be this is why it crashed for you
cradek, please just tell me if you have time to test this now. Not a problem if you don't, but please tell me because I have to go. But I can stay a while if needed.
cradek, ok, you're afk, so I assume you don't have time to test. So I go. see you tomorow :)
good night !
what to mill in wood
lepton: You were talking about a way to "numptify" the EMC2 interface? This is what my Lathe config looks like most of the time, running the same bit of adaptable G-code all the time in semi-manual mode.
[20:40:44] <andypugh> http://www.bodgesoc.org/lathe/lathe.html
andypugh: Yeah, that looks quite a lot like what we're invisioning
Feel free to steal any of it you fancy
We're currently finishing up the wiring of all our I/O, and once we've got it electrically tested my last major task is to finish up the gui
andypugh: I've seen jmkasunich do a similar thing but he just edits numbers in the file
He is probably more of a CLI geek to my GUIboi..
it'd be interesting to think of a way this could be done in touchy (with the wheel used to change the values)
Well, my milling machine now has a drawbar, with one minor flaw.
The only way to release it is to swivel the head all the way to upside-down and use the table to push the release plunger.
is the design defective or just not yet done?
Not done. I need a pneumatic cylinder. Oh, and a compressor.
funky new kind of tool changer.... easier to put a new tool in when its on top!
A lever would work, but would need engineering itself, and I am not totally sure that I want to push against the top bearing. I would rather "pinch" to release. Though I am not sure how much it matters, it is a big bearing. However I notice that Tormach went to great trouble to avoid it.
wow the forum has > 2000 members
Do any answer questions rather than ask them?
just a few and some demand an answer right away :)
like they paid for the answer
I'm running crippled atm with only 4 stations on the turret that work :/
I really don't like forums, it is really difficult to read through everything in sequence.
it's better if it is out of sequence?
I am a completist, I hate to think I have missed something. That's why I like mailing lists. (I used to read all of rec,motorcycles every day too, which was a challenge)
I guess I'm confused how could you miss anything on the forum?
oh bother, the menus don't work after the last upgrade
It isn't that, it is that you have to look for it. Search for new posts, click them one-by-one...
yea, that is a real chore to scroll down a bit to see what sections have new posts :P
It is manageable with the EMC forums, but anything half-way busy (like CNCzone for example) and there is no knowing what you are missing or how many parallel threads are covering the same issue.
I have the same feelings about the mailing list and usually just delete them all as there is too much traffic to try and sort out the order and follow a topic because the date/time is wrong for all of them
so you end up reading the end then message 22 then message 29 then 25...
I find that a gmail account for mailing lists makes it all very pleasant.
that is what I have but they still all come in out of order... can you remember what M1.. code I used to open my collet?
Odd, they don't come in out of order for me. Maybe you ISP is playing games?
Right, night all.