Re: [Emc-users] resolver/encoder converter
On Friday 08 February 2008, Jon Elson wrote: >Gene Heskett wrote: >> On Thursday 07 February 2008, Jon Elson wrote: >>>Gene Heskett wrote: I have about 6 feet of chip books (yeah, I know, today it would take 300 feet of shelves for half of them), Jon, but they don't include Analog Devices, and they are getting long in the tooth, sorta like me. :) I guess I'll have to go begging again. >>> >>>I don't use data books anymore. All the data sheets are on >>>line, and you are guaranteed to get the latest version, etc. >>>30 seconds with Google will get you to analog devices, and you >>>can look up on their site keywords of resolver and digital, and >>>you'll get a check list of the applicable models and the most >>>important differences between models. >>> >>>Jon >> >> I know that Jon, but old habits die only with difficulty it seems. >> Darnit. > >Well, I've been designing some new stuff at work using these >chips that are no bigger than a grain of rock salt (3 x 3 mm). >So, I've started using some stuff that is so new they are not in >ANY databook, only on-line. > >TI has gone insane, at last count there were 136 pages of TI >logic chips, at at least 100 part #'s per page, that is 13000+ >different parts! (Yes, some part numbers specify tape and reel >rather than cut tape, so it may be a little less. But, totally >insane to make so many oh-so-slightly different parts. I don't >understand. > >Jon All I can say is WOW & I don't understand it either! They must be trying to fit every socket on the planet, and that is not good business sense IMO. And that's just logic? What about analog & discretes? Whatever became of 'if you wanted cmos, call rca, if you wanted an op-amp, call Nat Semi, level translators call Mitel, power hexfets call IR" etc etc.. Note that's a statement even though it reads like a question. :) -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Since aerosols are forbidden, the police are using roll-on Mace! - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] resolver/encoder converter
Stuart Stevenson wrote: > Gentlemen, > I purchased an evaluation board from Analog Devices. I will try > it. It is the eval-ad2s1200cbz. It is fully populated with a BUNCH of > stuff. Randy and I will work with it. The tech support said it will > work. Randy read the propaganda and said it will work. I will know > Monday evening. Don't be so sure. Resolvers are fairly tricky, and the signals coming back are typically pretty small, so you have to watch shielding and grounding carefully. I hope it is a simple drop in, but if not, you should be able to get it going without anything extreme. I'm kind of interested in these, so I would like to hear how it goes. (If you want a minimal commercial board made for this, I'd be interested in working on it. Just resolver in, maybe a couple jumpers to set reference frequency, and some jumpers for the resolution.) Jon - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] resolver/encoder converter
Gene Heskett wrote: > On Thursday 07 February 2008, Jon Elson wrote: > >>Gene Heskett wrote: >> >>>I have about 6 feet of chip books (yeah, I know, today it would take 300 >>>feet of shelves for half of them), Jon, but they don't include Analog >>>Devices, and they are getting long in the tooth, sorta like me. :) I >>>guess I'll have to go begging again. >> >>I don't use data books anymore. All the data sheets are on >>line, and you are guaranteed to get the latest version, etc. >>30 seconds with Google will get you to analog devices, and you >>can look up on their site keywords of resolver and digital, and >>you'll get a check list of the applicable models and the most >>important differences between models. >> >>Jon >> > > I know that Jon, but old habits die only with difficulty it seems. Darnit. > Well, I've been designing some new stuff at work using these chips that are no bigger than a grain of rock salt (3 x 3 mm). So, I've started using some stuff that is so new they are not in ANY databook, only on-line. TI has gone insane, at last count there were 136 pages of TI logic chips, at at least 100 part #'s per page, that is 13000+ different parts! (Yes, some part numbers specify tape and reel rather than cut tape, so it may be a little less. But, totally insane to make so many oh-so-slightly different parts. I don't understand. Jon - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Generic controller
Gentlemen, Plain arrogance is why the machine tool builders will not settle on a standard. This would be mixed with the (misguided in my opinion) PROFIT motive. I late 1997/early 1998 I went to Oxnard, California to visit Haas. They were just developing the VR (5 axis) series machine. When I visited with Kurt Zierhut (sp?) the arrogance was very evident. Kurt is from England so this would ENHANCE his arrogance somewhat. He told me that as there is no standard G code Haas thought about changing even the XYZ symbols because they would be able to establish a defacto standard with their control and machines. They may have been able to as they have become a dominant force in the industry. EMC is ready to become the industry standard generic controller. Chris Radek helped me with a script to use APTos (APT360) with EMC. I pick the .apt extension program to load the program into EMC. The computer processes the program through APT360, posts it for EMC and loads the gcode into the control. I use an NC programming system call NCL. I have requested from NCCS a runtime version for Linux. NCL used to run on VAX VMS and the SGI Irix and IBM AIX. NCCS now focuses on Windows to use NCL. I am sure it would run on Linux with very minor changes. I would then be able to use all my part programs directly in EMC. I would like to see EMC display the APT360 program and I wouldn't even see the gcode unless I chose to. Computers are fast enough to process and post the programs in real time. Mastercam, Esprit, Unigraphic. BobCAD/CAM, Catia, WorkNC, SmartCam... Any NC programming system would then be able create a linux runtime and directly run EMC. The post processor would be a non-issue then. Wine could possibly be used now. This is beyond my capabilities but I know a person here that might just be able to make wine work. He was able to run Mastercam 8 in wine last week. Darn, I must go. My wife just woke me up to go to bed. Dreams are nice sometimes. :) thanks Stuart EMC is UMLIMITED! - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] resolver/encoder converter
Gentlemen, I purchased an evaluation board from Analog Devices. I will try it. It is the eval-ad2s1200cbz. It is fully populated with a BUNCH of stuff. Randy and I will work with it. The tech support said it will work. Randy read the propaganda and said it will work. I will know Monday evening. thanks Stuart - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Zero gage length
> -- > > Message: 8 > Date: Thu, 7 Feb 2008 21:39:49 -0700 (MST) > From: [EMAIL PROTECTED] > Subject: [Emc-users] Zero gage length > To: "Enhanced Machine Controller (EMC)" > > Cc: "Enhanced Machine Controller" > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain;charset=iso-8859-1 > > Hi > I want to ask, can EMC2 work with program that created with ZERO gage length. > > Thank you, > Aram > Aram, Yes, it can. It can work with a 5 axis program posted with no pivot length and no tool (gage) length. Stuart - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Zero gage length
Hi I want to ask, can EMC2 work with program that created with ZERO gage length. Thank you, Aram - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] resolver/encoder converter
On Thursday 07 February 2008, Kirk Wallace wrote: >On Thu, 2008-02-07 at 12:41 -0600, Jon Elson wrote: >> Gene Heskett wrote: >> > I have about 6 feet of chip books (yeah, I know, today it would take 300 >> > feet of shelves for half of them), Jon, but they don't include Analog >> > Devices, and they are getting long in the tooth, sorta like me. :) I >> > guess I'll have to go begging again. >> >> I don't use data books anymore. All the data sheets are on >> line, and you are guaranteed to get the latest version, etc. >> 30 seconds with Google will get you to analog devices, and you >> can look up on their site keywords of resolver and digital, and >> you'll get a check list of the applicable models and the most >> important differences between models. >> >> Jon > >Many years ago when I was a drafter, I would go over to the engineer's >area and go through the trash to find data books that I didn't already >have. I lugged those books around for far too long, though I kept a >couple for entertainment. Yup, some of the comments in Nat Semi books are like MasterCard, priceless. :) Need a fast analog buffer? They had 2 at the time, "fast", and "damned fast". Slew rate was 6000v/u-sec. Heck, we've got $1.25 op-amps faster that that now. >The problem now with is that there are far too many choices. It's way >faster to find what you need, but much longer to decide which one. I >like the good ol days when you had to live with what you couldn't have. Yeah, that too. I recall I needed a cmos analog multiplexer once, to switch video sources in a character generator, and the only way I could get the speed I wanted was to run 4000 family cmos stuff on the full supply available, in this case 28 volts. That's 15 volt rated stuff. But I could wrap a colored border around the character in a character generator when I got done. The 4028 warmed up about 10 degrees F, but everything ran cool and that way with zero failures for quite a few years after I built it. At 28 volts, it was the fastest cmos stuff on the planet. :-) -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Words have a longer life than deeds. -- Pindar - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] resolver/encoder converter
On Thursday 07 February 2008, Jon Elson wrote: >Gene Heskett wrote: >> I have about 6 feet of chip books (yeah, I know, today it would take 300 >> feet of shelves for half of them), Jon, but they don't include Analog >> Devices, and they are getting long in the tooth, sorta like me. :) I >> guess I'll have to go begging again. > >I don't use data books anymore. All the data sheets are on >line, and you are guaranteed to get the latest version, etc. >30 seconds with Google will get you to analog devices, and you >can look up on their site keywords of resolver and digital, and >you'll get a check list of the applicable models and the most >important differences between models. > >Jon > I know that Jon, but old habits die only with difficulty it seems. Darnit. -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Words have a longer life than deeds. -- Pindar - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] SMT Terminal Blocks?
On Thu, Feb 07, 2008 at 11:34:31AM -0800, Kirk Wallace wrote: > > I was planning on assembling the boards myself. When you say "I'd go > with through-hole parts.", do you mean the terminal blocks, or all > parts? I thought now would be a good time to get used to through-hole > parts going away. I've converted to 99% SMD, partly to save the labour of bending and snippping all those component leads, partly so I can use both sides of the board, making a neat little unit. A soldering iron tip with a solder-holding hollow allows me to solder all 11 pins on one side of a PQFP in one second. > I thought SMT screw terminals would be a long-shot, but I have some > surplus telecomm boards here that have some beefy double row pin > connectors in SMT, so I thought I'd ask. But as you say, these are > inside a housing and probably cycled a few times, worst case. Even a largish SMD Atmel micro I'm looking at has a metal pad underneath, which must be soldered or glued down, to ensure the package stays on the board. (Pin pads are shrinking all the time.) I have some SMD pinheaders, but wouldn't dare use anything but through-hole for lotsa amps and connecting stiff cable. I did try gently bumping the pinheaders off the surplus PCB. They'll withstand normal handling. Must try a destructive test. > That's good news about the holes being inexpensive. I was thinking I > should go with a single side board to avoid holes. There may be someone more convenient closer to home, but I've been happy with www.custompcb.com . Up to 500 holes, for the base cost. For prototyping, double sided and single sided at the same cost, so no issue for just a few off. The silver plated pads are a delight for SMD components, because they're so flat. Oh, and I can just send Eagle files, which suits. Just my experience, FWIW. You'd have to have similar in the northern hemisphere. Erik - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Generic controller
You would have to test each one to see if it is close enough. I've tried some and unless you stay to the basics like G0,1,2,3 they all seem to vary a lot. The closest one I found from my list was a generic fanuc post... YMMV If you find one that is the same as RS274 please post that information either here or on the wiki site. John On 7 Feb 2008 at 12:40, [EMAIL PROTECTED] wrote: > So are is there any of these that follow Rs274? > > 426_Parm_3d > DIN_ISO > Fadel_3d > Fanuc > Fanuc3d > Fanuc3x > Fanuc4ax > Haas_3x > Maho432_3d > Mikron23 > Okuma_3d > Roeders > Roeders4 > Sin810_4_3d - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Generic controller
Thanks Anders Wallin wrote: >> So are is there any of these that follow Rs274? >> > > more or less all of the ones below follow 'standard' g-code to some > extent I would think :) > > To really verify what works and what doesn't on each machine is beyond > what most people and companies have time/money to do. There is not much > convergence towards a common standard. The CAM software vendors are > happy to charge extra for a myriad of different post-processors and > their annual subscriptions... > It's strange that the machining industry hasn't settled on a standard > language for toolpaths. Julian Todd has much more to say about this - > see for example half way through this post: > http://www.freesteel.co.uk/wpblog/2008/01/worknc-art-and-mori-seiki/ > > > AW > > >> 426_Parm_3d >> DIN_ISO >> Fadel_3d >> Fanuc >> Fanuc3d >> Fanuc3x >> Fanuc4ax >> Haas_3x >> Maho432_3d >> Mikron23 >> Okuma_3d >> Roeders >> Roeders4 >> Sin810_4_3d >> > > - > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Generic controller
Hi Put in standard Fanuc. There are very few changes you will have to make. Andy Holcomb <[EMAIL PROTECTED]> wrote: So are is there any of these that follow Rs274? 426_Parm_3d DIN_ISO Fadel_3d Fanuc Fanuc3d Fanuc3x Fanuc4ax Haas_3x Maho432_3d Mikron23 Okuma_3d Roeders Roeders4 Sin810_4_3d Anders Wallin wrote: >> What is a generic controller form that the emc code needs to follow? >> Example Fanuc,Haas, etc. I am trying to set up solid cad and I need a >> generic cnc-controller to set up with. >> > > Fanuc, Haas, etc. probably all have their own dialect of "G-code" > > EMC mostly follows the RS274 standard > > look here: > http://www.isd.mel.nist.gov/documents/kramer/RS274NGC_22.pdf > and here: > http://en.wikipedia.org/wiki/G-code > > AW > > - > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Generic controller
> So are is there any of these that follow Rs274? more or less all of the ones below follow 'standard' g-code to some extent I would think :) To really verify what works and what doesn't on each machine is beyond what most people and companies have time/money to do. There is not much convergence towards a common standard. The CAM software vendors are happy to charge extra for a myriad of different post-processors and their annual subscriptions... It's strange that the machining industry hasn't settled on a standard language for toolpaths. Julian Todd has much more to say about this - see for example half way through this post: http://www.freesteel.co.uk/wpblog/2008/01/worknc-art-and-mori-seiki/ AW > 426_Parm_3d > DIN_ISO > Fadel_3d > Fanuc > Fanuc3d > Fanuc3x > Fanuc4ax > Haas_3x > Maho432_3d > Mikron23 > Okuma_3d > Roeders > Roeders4 > Sin810_4_3d - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Generic controller
So are is there any of these that follow Rs274? 426_Parm_3d DIN_ISO Fadel_3d Fanuc Fanuc3d Fanuc3x Fanuc4ax Haas_3x Maho432_3d Mikron23 Okuma_3d Roeders Roeders4 Sin810_4_3d Anders Wallin wrote: >> What is a generic controller form that the emc code needs to follow? >> Example Fanuc,Haas, etc. I am trying to set up solid cad and I need a >> generic cnc-controller to set up with. >> > > Fanuc, Haas, etc. probably all have their own dialect of "G-code" > > EMC mostly follows the RS274 standard > > look here: > http://www.isd.mel.nist.gov/documents/kramer/RS274NGC_22.pdf > and here: > http://en.wikipedia.org/wiki/G-code > > AW > > - > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Generic controller
> What is a generic controller form that the emc code needs to follow? > Example Fanuc,Haas, etc. I am trying to set up solid cad and I need a > generic cnc-controller to set up with. Fanuc, Haas, etc. probably all have their own dialect of "G-code" EMC mostly follows the RS274 standard look here: http://www.isd.mel.nist.gov/documents/kramer/RS274NGC_22.pdf and here: http://en.wikipedia.org/wiki/G-code AW - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Generic controller
What is a generic controller form that the emc code needs to follow? Example Fanuc,Haas, etc. I am trying to set up solid cad and I need a generic cnc-controller to set up with. Andy - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] SMT Terminal Blocks?
On Thu, 2008-02-07 at 14:14 -0500, Stephen Wille Padnos wrote: ... snip > Where you run into extra expense is if you get the boards assembled. > Adding through-hole parts means that the boards need to go through an > extra process - wave solder / cleaning. It may also change the SMT > process - adding glue for example, so SMT parts aren't washed away in > the wave solder machine. > > I'd go with through-hole parts. > > - Steve Thanks for the reply, Steve. I was planning on assembling the boards myself. When you say "I'd go with through-hole parts.", do you mean the terminal blocks, or all parts? I thought now would be a good time to get used to through-hole parts going away. I thought SMT screw terminals would be a long-shot, but I have some surplus telecomm boards here that have some beefy double row pin connectors in SMT, so I thought I'd ask. But as you say, these are inside a housing and probably cycled a few times, worst case. That's good news about the holes being inexpensive. I was thinking I should go with a single side board to avoid holes. -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending) - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] SMT Terminal Blocks?
Hi Kirk Kirk Wallace wrote: >I am trying to layout my serial DAC board. So far, I have used SMT for >everything, but I am down to the terminal blocks. I like these: > >http://rocky.digikey.com/WebLib/Phoenix/Web%20Data/1725656.pdf > > Those terminal blocks are good, but I don't think you'll find good ones in SMT packages. The reason is that the through holes are needed for mechanical reasons - you'd rip SMT pads off the PCB with too connector many mating cycles. I'm pretty sure I have seen SMT connectors like this before, but they still have pins that go through the board. >but of course they are through hole connectors. Does anyone know of a >good SMT connector? On the other hand, do holes cost much when having >boards professionally made? I will, at least, have four mounting holes, >but I can do those myself. > > Holes are essentially free when getting the PCB made. If you have more than 50 or 100 holes per square inch they may charge you more, but as long as you stick to the standard drill sizes, there shouldn't be a charge for a few holes (even with non-standard drills, the charge is usually a few $ per additional drill size, not per hole). Where you run into extra expense is if you get the boards assembled. Adding through-hole parts means that the boards need to go through an extra process - wave solder / cleaning. It may also change the SMT process - adding glue for example, so SMT parts aren't washed away in the wave solder machine. I'd go with through-hole parts. - Steve - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] resolver/encoder converter
On Thu, 2008-02-07 at 12:41 -0600, Jon Elson wrote: > Gene Heskett wrote: > > > I have about 6 feet of chip books (yeah, I know, today it would take 300 > > feet > > of shelves for half of them), Jon, but they don't include Analog Devices, > > and > > they are getting long in the tooth, sorta like me. :) I guess I'll have to > > go begging again. > > > > I don't use data books anymore. All the data sheets are on > line, and you are guaranteed to get the latest version, etc. > 30 seconds with Google will get you to analog devices, and you > can look up on their site keywords of resolver and digital, and > you'll get a check list of the applicable models and the most > important differences between models. > > Jon Many years ago when I was a drafter, I would go over to the engineer's area and go through the trash to find data books that I didn't already have. I lugged those books around for far too long, though I kept a couple for entertainment. The problem now with is that there are far too many choices. It's way faster to find what you need, but much longer to decide which one. I like the good ol days when you had to live with what you couldn't have. -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending) - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] SMT Terminal Blocks?
I am trying to layout my serial DAC board. So far, I have used SMT for everything, but I am down to the terminal blocks. I like these: http://rocky.digikey.com/WebLib/Phoenix/Web%20Data/1725656.pdf but of course they are through hole connectors. Does anyone know of a good SMT connector? On the other hand, do holes cost much when having boards professionally made? I will, at least, have four mounting holes, but I can do those myself. FYI - here is the schematic, comments welcome: http://www.wallacecompany.com/machine_shop/EMC2/serial_dac/serial_dac-4a.png -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending) - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] resolver/encoder converter
Gene Heskett wrote: > I have about 6 feet of chip books (yeah, I know, today it would take 300 feet > of shelves for half of them), Jon, but they don't include Analog Devices, and > they are getting long in the tooth, sorta like me. :) I guess I'll have to > go begging again. > I don't use data books anymore. All the data sheets are on line, and you are guaranteed to get the latest version, etc. 30 seconds with Google will get you to analog devices, and you can look up on their site keywords of resolver and digital, and you'll get a check list of the applicable models and the most important differences between models. Jon - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
