Re: [Emc-users] NAMES Backdrop Photos
Feel free to deposit movies on the FTP site also if movies are desired on site. There's space. As for the hanging/attaching issue, I am mounting all the photos on foam core and typically make an easel base when I do items like this. They can be placed on tables, at the base of tables, or I do have some PVC tube around the house that I could bring down and make an impromptu trellis of sorts. Greg www.distinctperspectives.com > -Original Message- > From: Dave Engvall [mailto:dengv...@charter.net] > Sent: Monday, March 16, 2009 11:41 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] NAMES Backdrop Photos > > > On Mar 16, 2009, at 8:34 PM, Jon Elson wrote: > > > John Kasunich wrote: > >> BTW, I'm pretty sure I have the original (rather large) movie file > >> for > >> the variable-pitch, variable-diameter threading. Might be fun to > >> be use > >> that instead of a screensaver. (The YouTube version won't work at > >> the > >> show unless you have a fast internet connection, but the movie > >> version > >> just sits on your disk and runs anywhere.) > >> > > If somebody is going to have movies running, I think there is one of > > Chris' 5-axis machine that ought to be shown, too. > > I thought that was QUITE cool! > > > > Jon > > > Is anyone thinking about support for the backdrop pictures. IIRC > > the "old" Names venue was pretty much an open room. Unless you get > a booth with a wall you are going to need racks, dividers, etc to > hang those beautiful pictures on. > > Dave > > -- > > > > Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) > > are > > powering Web 2.0 with engaging, cross-platform capabilities. > > Quickly and > > easily build your RIAs with Flex Builder, the Eclipse(TM)based > > development > > software that enables intelligent coding and step-through debugging. > > Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com > > ___ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > -- > Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are > powering Web 2.0 with engaging, cross-platform capabilities. Quickly and > easily build your RIAs with Flex Builder, the Eclipse(TM)based development > software that enables intelligent coding and step-through debugging. > Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] BIG CNC machine for making small airplane?
A few years ago someone built a Lancair (composite light aircraft) here, he was concerned that the chord of one wing was 2mm (5/64") longer than the other. In his research he asked Cessna what their manufacturing tolerance is and they replied "2 inches"! If you were to take a tape measure and measure any major dimension on a Cessna, if its within 2" its within spec. Greg - Original Message - From: "Roger" To: Sent: Tuesday, March 17, 2009 8:32 PM Subject: Re: [Emc-users] BIG CNC machine for making small airplane? > Tom writes: > > snip > >> OK... I am going to step in here at this point and say "Whoa pardner!" >> >> Yes, you can be a millimeter off in some areas with very little penalty, >> but in >> other respects a millimeter difference can defeat your ability to get off >> the >> ground ... or another millimeter placement of the balance point aft of >> the c.g. >> (center of gravity) will improve control response - but can produce a >> sharp >> stall with a tendency to roll inverted... > > Tom, > I've got to assume you are speaking in hyperbole. A 3m 120kg ultralight is > 3000mm long. Each mm offset of the center of gravity (120kg/3000mm) is 40 > grams > or about 1.5 oz. I would think that what you had for breakfast or which > way you > leaned would have much more of an affect on center of gravity or balance. > People > build ultralights out of pop riveted lawn chair aluminum that fly. I'm > sure that > not all of these are built on surface plates with interferometers. I think > that > 10mm's of accuracy is more than enough for a low performance airplane. > > Peter, > As to large volume routers, the neatest one I saw was a 5 axis robot arm > mounted > on a track used for carving boat hulls. The track was the X axis and the > Y,A,B > and Z were done using the robots native movements. It may have been a > surplus > welding robot. > > I think you would need a mathematician to figure out the kinematics. > > Good Luck, > Roger > > > > > > -- > Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are > powering Web 2.0 with engaging, cross-platform capabilities. Quickly and > easily build your RIAs with Flex Builder, the Eclipse(TM)based development > software that enables intelligent coding and step-through debugging. > Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.16/2005 - Release Date: 03/16/09 19:01:00 -- Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] BIG CNC machine for making small airplane?
Tom writes: snip > OK... I am going to step in here at this point and say "Whoa pardner!" > > Yes, you can be a millimeter off in some areas with very little penalty, but > in > other respects a millimeter difference can defeat your ability to get off the > ground ... or another millimeter placement of the balance point aft of the > c.g. > (center of gravity) will improve control response - but can produce a sharp > stall with a tendency to roll inverted... Tom, I've got to assume you are speaking in hyperbole. A 3m 120kg ultralight is 3000mm long. Each mm offset of the center of gravity (120kg/3000mm) is 40 grams or about 1.5 oz. I would think that what you had for breakfast or which way you leaned would have much more of an affect on center of gravity or balance. People build ultralights out of pop riveted lawn chair aluminum that fly. I'm sure that not all of these are built on surface plates with interferometers. I think that 10mm's of accuracy is more than enough for a low performance airplane. Peter, As to large volume routers, the neatest one I saw was a 5 axis robot arm mounted on a track used for carving boat hulls. The track was the X axis and the Y,A,B and Z were done using the robots native movements. It may have been a surplus welding robot. I think you would need a mathematician to figure out the kinematics. Good Luck, Roger -- Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] BIG CNC machine for making small airplane?
On Tuesday 17 March 2009 04:13, Peter Braroe wrote: > The main thing I am thinking about is how to make something work over such a > long distance as 6 meters. Perhaps a linear motor and a bicycle chain(s) > with a tensioner could be used for the long axis? Those parts are plentiful! > How to make an accurate sensor is then the question. Although if a beefy > stepper operates the chain cog and an initial calibration is performed then > perhaps that is good enough. the biggest foam routers I've seen were built something like an overhead crane with a gimbaled cutting head on an arm hanging down from the crane platform for something that size you might look into a cable drive setup something like the straight edge on an oversized drafting table and hang it from a couple of concrete walls in the garage or maybe build it up from sections of pallet rack as for the size of the components I'd think about breaking them down into more manageable chunks just to save on wasted foam you could easily get three or four half tubes to glue together out of a chunk of foam barely big enough to carve out one - one piece tube and it could be done on a much smaller machine Brian -- "Nemo me impune lacesset" -- Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] BIG CNC machine for making small airplane?
Burt Rutan figured this out in the 70's. with the Varieze and LongEze's. Tapered airfoils with twist can be made by running hot wires along numbered templates. CNC your templates then hotwire the wings in 4 foot sections. This will probably be too heavy a method for Sport Category craft. Scaled Composites in Mojave CA uses a 50' x 20' x 8' 5 axis gantry mill. http://www.scaled.com/services/cms_mill.html -- Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] BIG CNC machine for making small airplane?
Peter Braroe writes: snip... > Actually airplanes are a big like boats, not very precise... and I would be > very surprised if they had > millimeter precision! > snip... > wouldn't it be nice to just put a big > block up and have "instant airplane"! Just add the skin. > Has anyone attempted something like this before? Ideas? > Perhaps I will try to build something smaller first and experiment! > Best regards, everyone! > /Peter OK... I am going to step in here at this point and say "Whoa pardner!" Yes, you can be a millimeter off in some areas with very little penalty, but in other respects a millimeter difference can defeat your ability to get off the ground ... or another millimeter placement of the balance point aft of the c.g. (center of gravity) will improve control response - but can produce a sharp stall with a tendency to roll inverted... Although I am an EMC cnc machine builder/enthusiast, I am also a licensed glider pilot (N71J) and I have some experience with model scale aircraft design and composite structure fabrication. I have friends in the business of full-scale composite repair/modification - and most importantly I have known and discussed airframe design & modification with respected designer-test pilots who are now dead. Right here & now, I am seeing a lot of uninformed speculation about airframe design flying back and forth, and this is not the proper forum for speculating about such variables as wing thickness, spar design, dihedral, etc. At the very least, I suggest that you think in terms of breaking your endeavor into 2 components: ie: 1.) cnc machine design 2.) airframe design and fabrication Tom -- Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Automating emc2
I currently have Keling drivers and I have the enable pins hooked up but I don't know how to get EMC to manage the power to the steppers. How did you do this? And how can I get run to turn 'em on and stop to turn 'em off? (All this with the known caveat that powering down the motors loses accuracy). Thanks - Mike -Original Message- From: BRIAN GLACKIN [mailto:glackin.br...@gmail.com] Sent: Monday, March 16, 2009 8:22 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Automating emc2 If your driver chip has an idle current circuit, you can let EMC manage power to the steppers. I currently use this function and this past weekend, the machine was up for 8 hours with no activity. Touched the steppers and they were stone cold. Hit the run button and they were humming along. -- Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] BIG CNC machine for making small airplane?
Hi Peter, A previously asked question is very important: how many axes? 3 X, Y, Z? 4 X, Y, Z, A? If the A axis is the rotation of the part along the X axis that would actually be reasonably doable because the A movement could be the rotation of the table supporting the part. More than 4 axes gets complicated to engineer, expensive to build and challenging to program. A gantry design (spindle moves, table is stationary) would seem to be the logical choice for this project. It is quite possible that this machine could be built so that it can be disassembled. The locations where the machine is supported would need to be very rigid so that when the machine was assembled it could be anchored to these points and the anchoring would provide stability to the frame. Proper anchoring and triangles, triangles, triangles in the design will provide a structure that will make it possible to achieve the + / - 1 mm and probably better (depending on how fast the cutting process occurs). Is there a budget in mind for this project? I wish you success, Jim Fleig - Original Message - From: "Peter Braroe" To: Sent: Tuesday, March 17, 2009 7:13 AM Subject: [Emc-users] BIG CNC machine for making small airplane? > Hello all! > > > > Here are some thoughts: > > > > Precision > > Actually airplanes are a big like boats, not very precise. Consider a > bunch > of aluminum panels put together by hand with rivets, or wood spars with > cloth covering. I fly two different Cessna 172s and they are supposed to > be > identical but have very different feel to them. I think +/-1 mm or worse > would be fine. Probably 1 mm per meter of range would be OK too, > especially > if any error is symmetrical. Look at a 10 meter long wooden airplane from > the 1930s - they fly fine - and I would be very surprised if they had > millimeter precision! > > > > Dimensions > > The wing isn't very thick - perhaps only 4 inches or so. A bit more if it > is > to be done in one block with the "dihedral" i.e. the vee-in-the-middle. > The > fuselage would be no more than 1,5-2 meters from the lowest point to > highest. Less if the "empennage" (i.e. tail feathers) would be made > separately. If one wing where to be made at the time they would be 5,5 > meters each, and the fuselage would be maybe 8 meters - less since the > engine cowling would be made separate. > > > > Assembly from smaller parts > > This is of course an option - but wouldn't it be nice to just put a big > block up and have "instant airplane"! Just add the skin. but I agree that > it's probably wiser to calm down a little and limit the size to say 6 x > 1,6 > x 1,6 meters or so. Even that is of course massive! Then one could do one > wing at the time and then the fuselage. > > > > I am thinking perhaps assembling a frame from scaffolding tubing - then it > can be disassembled too! > > > > The main thing I am thinking about is how to make something work over such > a > long distance as 6 meters. Perhaps a linear motor and a bicycle chain(s) > with a tensioner could be used for the long axis? Those parts are > plentiful! > How to make an accurate sensor is then the question. Although if a beefy > stepper operates the chain cog and an initial calibration is performed > then > perhaps that is good enough. > > > > Has anyone attempted something like this before? Ideas? > > > > Perhaps I will try to build something smaller first and experiment! > > > > Best regards, everyone! > > > > /Peter > > > > > > -- > Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are > powering Web 2.0 with engaging, cross-platform capabilities. Quickly and > easily build your RIAs with Flex Builder, the Eclipse(TM)based development > software that enables intelligent coding and step-through debugging. > Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] NAMES Backdrop Photos
NAMES booths are 10' by 10' normally. Booth B15 shows on the floor plan as having a sliver of open space on one side, probably a mandated access to some safety related equipment on the facility wall. Otherwise you have only 10' of frontage for access. This is why I was hoping we could juggle and get 3 adjacent booths for PMDX, PICO, and EMC and thus share open space and allow people to walk through the booth while still having displays on the front. The two supplied tables per booth are 2.5' by 8' and can be arranged as you wish, including as an L that slightly exceeds the 10' side dimension. Putting a table on each side results in an alley 5' wide down the middle, and this gets crowded easily. An open L with one table along the back wall would likely be best, unless the "sliver" is wide enough for people to walk back and forth between booths. Steve Stallings > -Original Message- > From: Dale Grover [mailto:dgro...@redcedar.com] > Sent: Tuesday, March 17, 2009 7:06 AM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] NAMES Backdrop Photos > > At 8:41 PM -0700 3/16/09, Dave Engvall wrote: > > > > Is anyone thinking about support for the backdrop pictures. IIRC > > the "old" Names venue was pretty much an open room. Unless > you get a > >booth with a wall you are going to need racks, dividers, etc to hang > >those beautiful pictures on. > > > >Dave > > While we're against a wall, I think we're required to have > everything freestanding. (I'll try to check.) Besides, I > think folks will want to look at the photos up close and read > the captions, so we can't have them too far away. We have > the space--perhaps the booth is an open U shape? > > --Dale > > EMC at NAMES 2009 wiki page: > http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?EMC2AtNAMES > > -- > > Apps built with the Adobe(R) Flex(R) framework and Flex > Builder(TM) are powering Web 2.0 with engaging, > cross-platform capabilities. Quickly and easily build your > RIAs with Flex Builder, the Eclipse(TM)based development > software that enables intelligent coding and step-through debugging. > Download the free 60 day trial. > http://p.sf.net/sfu/www-adobe-com > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] NAMES Backdrop Photos
At 8:41 PM -0700 3/16/09, Dave Engvall wrote: > > Is anyone thinking about support for the backdrop pictures. IIRC > the "old" Names venue was pretty much an open room. Unless you get >a booth with a wall you are going to need racks, dividers, etc to >hang those beautiful pictures on. > >Dave While we're against a wall, I think we're required to have everything freestanding. (I'll try to check.) Besides, I think folks will want to look at the photos up close and read the captions, so we can't have them too far away. We have the space--perhaps the booth is an open U shape? --Dale EMC at NAMES 2009 wiki page: http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?EMC2AtNAMES -- Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] BIG CNC machine for making small airplane?
I don't want to be negative because I like when people try out new ideas, but... The rules are very clear, wings must have a tested beam and cross sections to be certified. Foam is for surfboards. Not even the lighest gliders are built with any type of foam. Beams and sections. Always. But it doesn't stop you from building a very long router to build parts. Go for it! There are several ways with fixed belts that operates smoother than chains, but now we're getting way off this list. :) Regards, Sven 2009/3/17 Stuart Stevenson > How would you hollow out the fuselage if you cut it out of one block of > foam? > > On Tue, Mar 17, 2009 at 6:13 AM, Peter Braroe > wrote: > > Hello all! > > > > > > > > > -- Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] BIG CNC machine for making small airplane?
How would you hollow out the fuselage if you cut it out of one block of foam? On Tue, Mar 17, 2009 at 6:13 AM, Peter Braroe wrote: > Hello all! > > > > Here are some thoughts: > > > > Precision > > Actually airplanes are a big like boats, not very precise. Consider a bunch > of aluminum panels put together by hand with rivets, or wood spars with > cloth covering. I fly two different Cessna 172s and they are supposed to be > identical but have very different feel to them. I think +/-1 mm or worse > would be fine. Probably 1 mm per meter of range would be OK too, especially > if any error is symmetrical. Look at a 10 meter long wooden airplane from > the 1930s - they fly fine - and I would be very surprised if they had > millimeter precision! > > > > Dimensions > > The wing isn't very thick - perhaps only 4 inches or so. A bit more if it is > to be done in one block with the "dihedral" i.e. the vee-in-the-middle. The > fuselage would be no more than 1,5-2 meters from the lowest point to > highest. Less if the "empennage" (i.e. tail feathers) would be made > separately. If one wing where to be made at the time they would be 5,5 > meters each, and the fuselage would be maybe 8 meters - less since the > engine cowling would be made separate. > > > > Assembly from smaller parts > > This is of course an option - but wouldn't it be nice to just put a big > block up and have "instant airplane"! Just add the skin. but I agree that > it's probably wiser to calm down a little and limit the size to say 6 x 1,6 > x 1,6 meters or so. Even that is of course massive! Then one could do one > wing at the time and then the fuselage. > > > > I am thinking perhaps assembling a frame from scaffolding tubing - then it > can be disassembled too! > > > > The main thing I am thinking about is how to make something work over such a > long distance as 6 meters. Perhaps a linear motor and a bicycle chain(s) > with a tensioner could be used for the long axis? Those parts are plentiful! > How to make an accurate sensor is then the question. Although if a beefy > stepper operates the chain cog and an initial calibration is performed then > perhaps that is good enough. > > > > Has anyone attempted something like this before? Ideas? > > > > Perhaps I will try to build something smaller first and experiment! > > > > Best regards, everyone! > > > > /Peter > > > > > > -- > Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are > powering Web 2.0 with engaging, cross-platform capabilities. Quickly and > easily build your RIAs with Flex Builder, the Eclipse(TM)based development > software that enables intelligent coding and step-through debugging. > Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > -- Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] BIG CNC machine for making small airplane?
Hello all! Here are some thoughts: Precision Actually airplanes are a big like boats, not very precise. Consider a bunch of aluminum panels put together by hand with rivets, or wood spars with cloth covering. I fly two different Cessna 172s and they are supposed to be identical but have very different feel to them. I think +/-1 mm or worse would be fine. Probably 1 mm per meter of range would be OK too, especially if any error is symmetrical. Look at a 10 meter long wooden airplane from the 1930s - they fly fine - and I would be very surprised if they had millimeter precision! Dimensions The wing isn't very thick - perhaps only 4 inches or so. A bit more if it is to be done in one block with the "dihedral" i.e. the vee-in-the-middle. The fuselage would be no more than 1,5-2 meters from the lowest point to highest. Less if the "empennage" (i.e. tail feathers) would be made separately. If one wing where to be made at the time they would be 5,5 meters each, and the fuselage would be maybe 8 meters - less since the engine cowling would be made separate. Assembly from smaller parts This is of course an option - but wouldn't it be nice to just put a big block up and have "instant airplane"! Just add the skin. but I agree that it's probably wiser to calm down a little and limit the size to say 6 x 1,6 x 1,6 meters or so. Even that is of course massive! Then one could do one wing at the time and then the fuselage. I am thinking perhaps assembling a frame from scaffolding tubing - then it can be disassembled too! The main thing I am thinking about is how to make something work over such a long distance as 6 meters. Perhaps a linear motor and a bicycle chain(s) with a tensioner could be used for the long axis? Those parts are plentiful! How to make an accurate sensor is then the question. Although if a beefy stepper operates the chain cog and an initial calibration is performed then perhaps that is good enough. Has anyone attempted something like this before? Ideas? Perhaps I will try to build something smaller first and experiment! Best regards, everyone! /Peter -- Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] NAMES Backdrop Photos
Note about NAMES, and every other show I have been to lately: Attaching things to the walls or any other part of the facility is not allowed. You must use self supporting displays. Also, the supplied table coverings are thin plastic that is easily torn if you try to slide a heavy object around on your table. The tables are standard folding units that will support a couple of hundred pounds if placed over the leg, but not in the middle. Steve Stallings > -Original Message- > From: Dave Engvall [mailto:dengv...@charter.net] > Sent: Monday, March 16, 2009 10:41 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] NAMES Backdrop Photos > > > On Mar 16, 2009, at 8:34 PM, Jon Elson wrote: > > > John Kasunich wrote: > >> BTW, I'm pretty sure I have the original (rather large) movie file > >> for the variable-pitch, variable-diameter threading. > Might be fun to > >> be use that instead of a screensaver. (The YouTube version won't > >> work at the show unless you have a fast internet > connection, but the > >> movie version just sits on your disk and runs anywhere.) > >> > > If somebody is going to have movies running, I think there > is one of > > Chris' 5-axis machine that ought to be shown, too. > > I thought that was QUITE cool! > > > > Jon > > > Is anyone thinking about support for the backdrop pictures. > IIRC the > > "old" Names venue was pretty much an open room. Unless you get > a booth with a wall you are going to need racks, dividers, > etc to hang those beautiful pictures on. > > Dave > > > -- > > > > Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) > > are powering Web 2.0 with engaging, cross-platform capabilities. > > Quickly and > > easily build your RIAs with Flex Builder, the Eclipse(TM)based > > development software that enables intelligent coding and > step-through > > debugging. > > Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com > > ___ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > -- > > Apps built with the Adobe(R) Flex(R) framework and Flex > Builder(TM) are powering Web 2.0 with engaging, > cross-platform capabilities. Quickly and easily build your > RIAs with Flex Builder, the Eclipse(TM)based development > software that enables intelligent coding and step-through debugging. > Download the free 60 day trial. > http://p.sf.net/sfu/www-adobe-com > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] VB: BIG CNC machine for making small airplane?
Have a look at cnczone.com, there are numerous of home made machines in large size. You need the big the garage, that's for sure. To cut building costs you can choose to not use ballscrews, linear guides exist in different rigid types and there are also a bunch of proven home made designs. But my most important suggestion is: design before you build! You'll cut the number of mistakes when you model it. Regards, Sven 2009/3/17 Tom > BRIAN GLACKIN writes: > > > > > Why cut the whole part at once? > > > > Model the part, create smaller pieces to cut. > > > > Assemble the smaller pieces. into original whole. > > > > finish by hand. Can't be too hard to finish. > > > > Allows for smaller work envelope and better tolerances perhaps? > > > -- Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
