right thats easy
turn the current up and run them fast and hard
when they get too hot to touch, thats about right
so, tehe current can be measured with an ampmeter ?
yes the ACTUAL current can be measured with an ampmeter
the RATED current is derived by seeing how much curren t you can push before it gets too hot
or .. you can ask the manufacturer for the rated current
and wont burn your fingers
yeah, i know ..
i was thinking, many years ago
yeah? why did you stop
i was building box fro speakers
before calculate the box,
we was checking all possible parameters
like resistence, resonance frequency, etc etc
les big box ..
* robin_sz vaguely remembers thielle-small params and lots of hard maths
for motors seem hard to check real values parameters
like curve or others..
good manufacturers provide that
but check it by hand could be interesting
servo motors behave very much like loudspeakers
I have seen speakers that use rotary servo motors...
and I have made xyz machines using large loudspeaker voice coils!
got a picture ?
voice coil drive
no picture unfortunately
for speakers there are many software,
to draw frequancy response, and other
but many large low frequency loudspeakers can apply a force of several hundred newtons
in fact the speaker term BL product
is simply newtons per amp
20-30 is common
i've an impedance meter
with variable frequency ..
handy to have
i used it to measure impedance of speakers with different frequency
20 hz-20 khz
then draw the curve
I use signal analyzers to do that
on pc ?
you can buy software that uses pc sound card to show impedance curves
I doubt on how accurate is..
probably, it depend on sound card quality
I am having to measure impedances of piezo acoustic stuff these days
it can be pretty accurate if the sound card is good quality
right now i am having to add inductance to a piezo element to get an impedance match
best match if load is the exact complex conjugate
in my case 1000 ohms plus 3 milliHenry
same math as motors really
I measure and model impedance of cnc machine tools similarly
first time i eard that
i believe :)
We can design very optimal systems that way
just like loudspeakers
i will try to find some doc about
There is plenty on the web
lots of math.
I like math.
Robin does plenty of math, but I am not sure he likes it!!!
i dont' like too .. but sometime is useful
anyone see any problems using this router bed design ? http://www.whipy.demon.co.uk/cncv2-1.dxf
the vertical sides need some extra support i think
* paul_c looks around for Jymmm
* Jymmm waves
Why are you not in bed ?
Jymmm: was waching redshow :)
hi paulc :)
I am not greatly fond of bb rollers on a round shaft
im about to finish a puppy linux emc2 livecd :)
I have a question!
Jymmm: 4.23 being uploaded to servers as we speak.
Where is the auto tool change stuff in emc?
emc.run doenst work quite well with busybox builtins ;)
cncuser: If you distribute it, you will end up being the "expert" and have to give support to all and sundry.
paul_c: hehe, notime ;)
les: Tool change logic or commands to implement it ?
cncuser: No, you misunderstood.....
logic and comms...looks like I may score an HSD auto change electrospindle
paul_c: but i hope there will be downloads available for testing within the next hours, im fiddling with libtcl right now :) non grapical it works allready
You will end up providing support whether you want to or not.
paul_c: hehe, well see :)
les: The comms consist of a couple of simple messages - prep tool & load tool (/me checks)
and tool unload
M06 Txx needs to send the spindle to a place where the tool is and do the logic to change it...
could be via external plc...
The logic to handle tool changes is all within bridgeportio
I think there is no function to send the end effector toa specific location?
kinda out of io to do that?
In the NIST model, M06 initiates the tool change, but does not involve any motion.
bridgeportio assumes the spindle is in the correct location for a tool change.
ok so Mo6 needs to be followed with a corresponding xyz move to get to where it needs to be?
Having said that, there is some hackery that allows you to define the tool change position from within the ini....
well, I need to study it
and an M06 will take you there (I think...) Ray would be the best one to ask about that detail.
the turkey call stuff involves 24+ manual tool changes a day
it gets old!
cu later (reboot)
At the end of the day, it depends on how you implement the mechanics of a tool change....
Do you use a pick'n'place tool change or...
simplest would be just a row of tools in the work envelope
Right - What I call pick'n'place
tool xx corresponds to position xyz
rather than having an arm swing round to load the tool.
but I see no facility for that in bridgeportio
There isn't - Bridgeportio has no way of commanding motion.
what you need is a small toolchange macro in your g-code
go to T1 - Unload tool - Go to T3 - Load tool
well the quick and dirty way is to post process 274 files to add to an xyz
detect M06 and add the motion g code
the current interpreter model makes those sorts of macros messy to implement.
pity one can't put it in the tool table
I would have to process the g code file withan external program I guess
Hey les, I got a mini grease gun last night, but the ONYL cartridges they had were lithium grease. Kinda a carmel color (not white). Should that be ok?
A pick'n'place toolchanger needs to remember to unload the old tool in the correct slot before loading a new one.
anyway, I hope to do this. I have turkey stuff coinciding with engineering stuff. I want to do both.
The key is to up the productivity of the machine.
like one day of cnc time keeps the sanders busy for a week.
I can do this now thanks to your bugfix
* Jymmm pokes les.... look up ^^^
I can use more power because I can run faster.
paul_c: and what were you screaming to me about earlier?
I have to look at the keyboard...I can't type!!!
* paul_c needs to check all the tp fixes made it in to cvs.
yeah lithium will do.
EP is good too.
* Jymmm hands les color coded irc client that highlights when being spoken to =)
Jymmm: BDI-4.23 is being uploaded to the server(s) so that you can burn some beer mats.
it would have to be on the keyboard
paul_c ah, cool! When I get the replacement cdrom for the laptop I got, I'll try and install it on there.
* Jymmm got a ThinkPad i1500 for $50.... the cdrom was going out and got a replacement for $15 off ebay.
Dumb thing needs a full charged battery to update the BIOS, will get a Ni-MH battery for $45 when I know the cdrom is working correctly.
les: Type in "/beep 30 5" to your irc window.
I did that
[01:01:22] <paul_c> http://www.mirc.com/cmds.html
now it will do that every time a line is directed at you.
* Jymmm says hi to Jymmm
/beep doesn't work with ksirc, but I guess it does for Les.
30 beeps! haha
it does not say what initiates the beeps.
les says hi to les
pulling yer leg.
les says hi to <les>
do you really want 30 beeps every time someone mentions your name ?
4 would be ok!
right - Time for bed.
les you CAN setup mirc to change the color of text when your name is called.
At the top... click on TOOLS|OPTIONS
The on the left, expand the section that says 'IRC'
then click on 'highlight' and enter in your nicks that you use...
and of course, check 'enable highlighting'
Jymmm: you swiched my desktop !
can't find a curvetracer schematic in all the net :\
just some simple circuit ..
[Global Notice] Hi all. Hyperion 1.0 (release) looks ready to go. It includes patches for Y: line checking, unkline propagation, join throttling and ping timeout disable. In about 3.5 hours we'll upgrade the production network.
[Global Notice] This will have a pretty major effect on network operations, but should, if all goes well, be over in about 10 minutes. Thanks in advance for your patience, and thank you for using freenode!
Jymmm is now known as Red70sShow
Red70sShow is now known as Jymmm
[Global Notice] Hi all. In about 15 minutes, we'll be upgrading to hyperion 1.0 (release). Thank you in advance for your patience, and have a great morning!
[Global Notice] Okay, here we go.... see you on the other side, hopefully. (Thanks to Australia for lighting the way....)