morn, just took my 1st cut with my new cnc based on emc2 !!
yep i'm well pleased!
it actually all works
[09:51:49] <pjm> http://pjm.dyndns.org/cnc1.jpg
is my machine
i just have some counter weight to add for the Z, then it'll be perfect. I used a smaller weight but need 25Kg really
* fragalot jealously stares at pjm
fragalot, the cure is to start building :)
archivist_ub: i should do a fund raiser first
I know the money problem, I want to get on with axis 5..........
and the boss is threatening to sell the site here (no job then)
i'd be happy with 3
I also need a bigger machine to take on more common work
what do yo uhave now?
hmm g83 doc error
R is unexplained in the G83 doc
archivist_ub: got any pics of it?
ah yeah that one, looks fun
4 axis machines rule
in 24 bit color
* archivist_ub adjusts to yuv
or maybe pink
* skunkworks_ is color blind
fenn: for your high powed hexapod.. http://www.electronicsam.com/images/KandT/servostart/boardfinal4.PNG
make one out of copper already, sheesh
well - I was waiting for jepler to get his machine straitened out.. ;)
I think he successfully made a board yesterday
yeah, after setting the trace widths to 87mil
why so thick?
no, I think it's due to the runout on the dremel spindle
I think it would have been OK with slightly narrower traces, but I went to the max I could without getting drc errors
was this for the breakout board?
it ended up looking about like this in eagle: http://emergent.unpy.net/files/sandbox/switch-breakout.png
does that plug go right to some part of the pluto?
those are some fatty traces :)
cradek: that 5x2 connector is the same pinout as the shrouded header on the pluto, you could connect them with a ribbon cable. I actually used the sparkfun female jumper cables, though.
old serial port thingies are 5x2
archivist: your worm and ring gears are really nice.
tom1, its fun making, with 5 axis it will be easier
they just went out the door 15 minutes ago
ra3vat is now known as dimas_
I wonder how small a thread you can cut (in spec) with a plain old TCMT insert with 1/64" radius
hm, they may not have the necessary relief
does anyone know how to change the 'x' size here
[18:50:50] <skunkworks_> http://imagebin.ca/view/s-OWMC4.html
hmm, not very small, since 32 tpi would be the first one you could even think about cutting - and you would be completely on the radius
I cannot for the life of me find the setting.
I want the traces connected to the pad bigger. More substantial
look in drc for thermal?
maybe even just disable them
I will look again.
change the width of the polygon
well cool - I can turn it off.. (I didn't know it was part of the polygon) duh
now lets see if I can make them bigger
you can be sarcastic if you want.. ;)
result of changing width of a polygon: http://emergent.unpy.net/files/sandbox/thermals-12mil-50mil.png
I am seeing the effect. the issue is that it doesn't fill in where I need the 'fill'. I may just turn them off. I will have to play with it a bit.
you could rip up the polygon, then route from the pad into where you know the polygon will fill, then ratsnest. it will keep the wider trace that you added manually
you can do the same without ripping anything up if you use this command: wire 'signalname
(change 'signalname to your signal name, e.g., 'gnd)
Hmm - neat idea. I will have to try that. The thermals are nice because they keep the solder around the pad better. but those are just a little too small.
(in my mind)
jepler: when I rip up the polygon - I cannot run route from the pad. Can I force a route?
skunkworks_: rip up polygon. set polygon_ratsnest off. rats. now you'll get the airwires
then when you're done, set polygon_ratsnest on. rats. that'll put the polygon back
Cool - thanks
rats are good
alex_joni: "ratsnest" is a command in eagle that makes it place "airwires" between pads and traces with the same signal name that aren't connceted by wires.
but by default "ratsnest" also recomputes polygons, which caused the board to end up without any airwires
the "route" command requires you to pick an airwire as the first step
I am sure this is confusing if you're not an eagle user ..
lots of crazy non-words
they are words..
but yeah, confusing :)
good night all
does this make sense?
[22:22:26] <skunkworks> http://www.cnczone.com/forums/showthread.php?p=489174#post489174
I agree it would be cool, but it can't really work, and it's not a control issue. consider the angle at which the tool meets the workpiece when you're doing this.
right - but simple ovals (that are almost round) would work
that's called slow tool servo
or slow slide servo
freeform machine tools do it, and some custom aftermarket controls do as well
there's a primitive version of it called form relieving
for manual machines
it's how camshaft grinders work, too
isnt the big issue having enough torque to move your machine fast enough :p
and a servo controlled spindle/rotary table
what some of those machines do is just keep a constant spindle speed and make the X axis do all the hard work
yep.. requires alot of torque
so they don't have to deal with having to have full control over the C axis
or slower spindle speed ;)
at 1krpm you need to move the slide in and out 8.3 times per second :)
if you are making a lobe ;)
depends on the tool system
some are short stroke, high frequency
but most aren't.
most turn at 60-100 rpm.
that's besides the point really
1" stroke is more than enough for some applications
not all forms need the whole X axis stroke
i'm not talking about the really high frequency thing, i'm saying there are tool systems that can do 700-1000 hz over moderate ranges
where do you find that kind of actuators at a sane price?
they're using speaker voice coil type things as linear motors
you are talking about diamond turning machines right?
i mean some diamond turning lathes use that type of system
Yes, but for a normal lathe?
okay well, define "normal lathe"
because plenty of places consider 8+ axis lathes "normal" now
I'd say diamond turning lathe's arent normal.
it's like comparing a cmm to a caliper..
but i'm not talking about diamond turning lathes - you brought it up
whatever, the bottom line is it's possible, and if you don't care about speed, you could do it on a hobby machine
they are SUPER PRECISION 2 axis only... the ones ive seen anyway
modulating stuff at 1000hz is damn fast :)
yes... i WILL do it on my hardinge no problem
you don't need a 1000 hz slow tool system to get started in asymmetric turning
slow down... the diamond will work slower..
toastydeath: though voicecoil's will do that kind of speed, but they are fairly shitty in regards to torque.
i'm sure that was a design issue for those kind of systems
drive torque with diamond is relativly LOW if you use a small TNR
and this isn't diamond turning!
you can take any old dumb lathe with a good enough spindle encoder and do asymmetric turning if your control supports it
those are the only two requirements
I wonder if you can turn flats if your machine is fast enough
or if you slow your machine down enough, all you need is to stay inside what you consider a reasonable following error
broaching is the same.. jus co-ordinate the c-axis ... i made a 16 lobe X .06" rise and fall on a DMG linear about 5 yrs ago..
the trick is getting the control to synch the C axis without requiring a bajillion lines of code
the linear would do a 1/2 " flat true to .003 flatness
but since the emc folks are already trying to do some pretty neat 5-axis stuff to enable hand programming those forms
i had a pretty neat macro to map the c axis
but the big guys want CAM integration.... so new and exotic g-codes are Bad to their thoughts
i have programmed a DMG evolution AT the machine to make a Visitors part @ a show.... tell me what you want... i'l make it come true
siemens 840D LOADED
but i can do the same thing on ANY machine that can keep up with my 12 lines of code