Re: [Emc-users] Request for Fonts
On Tuesday 12 February 2008, wp wrote: Gene, The Bobcad font is in the .FNT format if you can use it send me an email off list and I will send it to you. I have version 19 of BobCad. Wayne \ Humm, that sounds like a potential copyright problem, so I'll skip. I may be able to find something in a single line font on goldenweb.it, that's a great site to pull fonts from, probably sick bird here, but... Gene Heskett wrote: On Tuesday 12 February 2008, Jon Elson wrote: Is that something I could extract and use elsewhere Jon? -- 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) Thinking you know something is a sure way to blind yourself. -- Frank Herbert, Chapterhouse: Dune - 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] Request for Fonts
wp wrote: Gene, The Bobcad font is in the .FNT format if you can use it send me an email off list and I will send it to you. I have version 19 of BobCad. Wayne Gene Heskett wrote: On Tuesday 12 February 2008, Jon Elson wrote: Is that something I could extract and use elsewhere Jon? Those fonts are probably copyright by Bobcad. Unless you can document that they are licensed for other uses, please don't pass them around. (If you insist on doing so, please don't talk about it here.) Regards, John Kasunich - 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] OT: C Data Type Problem
The first time the compiler comes across the function it doesn't know the prototype, so it assumes that it returns an int. Then when it comes across the function declaration it is different. The type of a function is defined by the return type and the parameter types which must always match when the function is declared and when it is defined. Add the following after the #include but before the main function: unsigned short CRC16(unsigned char *puchMsg, unsigned short usDataLen); This will define the function so nothing is assumed by the compiler. Andy Kirk Wallace wrote: At the risk of letting everyone know I am a C newbie. Oh ... you already know? I am getting: [EMAIL PROTECTED]:~/emc2/Modbus$ gcc -o modbus-1c modbus-1c.c modbus-1c.c:75: error: conflicting types for 'CRC16' modbus-1c.c:28: error: previous implicit declaration of 'CRC16' was here [EMAIL PROTECTED]:~/emc2/Modbus$ The offending code is here: http://www.wallacecompany.com/machine_shop/EMC2/modbus/modbus-1c.c I thought my call and return data types match, but some how they must not. Sometimes when I get messages I can't explain, I find it is because I haven't #incude'd something, but I played with some options that came to mind, without any luck. Can anyone point me in the proper direction? Thanks. -- Andy PGP Key ID: 0x67090A54 - 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] OT: C Data Type Problem
On Tue, 2008-02-12 at 15:36 -0700, Andrew Ayre wrote: The first time the compiler comes across the function it doesn't know the prototype, so it assumes that it returns an int. Then when it comes across the function declaration it is different. The type of a function is defined by the return type and the parameter types which must always match when the function is declared and when it is defined. Add the following after the #include but before the main function: unsigned short CRC16(unsigned char *puchMsg, unsigned short usDataLen); This will define the function so nothing is assumed by the compiler. Andy Thanks, Andy and Ken. I seem to recall from another life long ago that main usually went at the bottom of C files. Now I know why, and how to cheat. I found this website to check my CRC program: http://www.lammertbies.nl/comm/info/crc-calculation.html?crc=10410102FF00method=hex and we agree. 10 41 00 00 01 02 FF 00 CRC16's to CF F1 , cool. -- 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] Request for Fonts
Okay, I answered my own question with a little research. Here's one: Documentation for PlotFont - http://www.delorie.com/gnu/docs/plotutils/plotutils_27.html Part of a larger package PlotUtils - (Docs) - http://www.delorie.com/gnu/docs/plotutils/plotutils.html#SEC_Top Source - http://www.delorie.com/gnu/dl/gnuindex.cgi/ftp.gnu.org/plotutils Otherwise I see that they can be used with TEX, IDL, Java Chris Chris Barker wrote: I'm interested being they are free to use . :^) What font utilities will read .jhf files? In either Linux or MS Windows. If I can ultimately get them into CAD then I can go from there. Thanks, Chris - 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] HobbyCNC driver board support
Does someone have suggestions on how to set up the config for a HobbyCNC driver board? Thanks ... - 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] UK suppliers of stepper motors and drive electronics.
With the experience I have gained so far, it leads me to believe that you are making choices that may make your quest more difficult. If you are trying to have a CNC machine to make parts and spend as little as appropriate for that end, then you should consider studying other machines that are already proven to perform and copy their success. If you want to explore different methods of machine control, be prepared to spend allot more time, money and run into dead-ends. You will also need to be able to develop your own software because these days, hardware won't do anything without software. whoa there, are you telling me EMC can't do PID? shirley not.. - 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] Request for Fonts
Hi, I you can make this work then it is clearly open http://tulrich.com/fonts/#20070211 Dave On Feb 12, 2008, at 12:56 PM, Gene Heskett wrote: On Tuesday 12 February 2008, wp wrote: Gene, The Bobcad font is in the .FNT format if you can use it send me an email off list and I will send it to you. I have version 19 of BobCad. Wayne \ Humm, that sounds like a potential copyright problem, so I'll skip. I may be able to find something in a single line font on goldenweb.it, that's a great site to pull fonts from, probably sick bird here, but... Gene Heskett wrote: On Tuesday 12 February 2008, Jon Elson wrote: Is that something I could extract and use elsewhere Jon? -- 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) Thinking you know something is a sure way to blind yourself. -- Frank Herbert, Chapterhouse: Dune -- --- 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
[Emc-users] OT: C Data Type Problem
At the risk of letting everyone know I am a C newbie. Oh ... you already know? I am getting: [EMAIL PROTECTED]:~/emc2/Modbus$ gcc -o modbus-1c modbus-1c.c modbus-1c.c:75: error: conflicting types for 'CRC16' modbus-1c.c:28: error: previous implicit declaration of 'CRC16' was here [EMAIL PROTECTED]:~/emc2/Modbus$ The offending code is here: http://www.wallacecompany.com/machine_shop/EMC2/modbus/modbus-1c.c I thought my call and return data types match, but some how they must not. Sometimes when I get messages I can't explain, I find it is because I haven't #incude'd something, but I played with some options that came to mind, without any luck. Can anyone point me in the proper direction? Thanks. -- 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] Request for Fonts
On Tue, 12 Feb 2008, wp wrote: John personally that font is such a piece of crap I wouldn't want it anyway.as for copyright.. I have no idea and that thought never crossed my mind. I think that there are much better and openly available fonts other than in BobCad I can not get that font to open even with a .FNT file reader. Wayne There are several attractive single line fonts packaged with the Qcad program, in /usr/share/qcad/fonts however they are in a strange format that appears to be unique to qcad. The format looks easily reverse-engineerable since it's just arcs and lines, or you could save the text as .dxf and convert to g-code that way. -fenn - 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] Request for Fonts
John personally that font is such a piece of crap I wouldn't want it anyway.as for copyright.. I have no idea and that thought never crossed my mind. I think that there are much better and openly available fonts other than in BobCad I can not get that font to open even with a .FNT file reader. Wayne John Kasunich wrote: wp wrote: Gene, The Bobcad font is in the .FNT format if you can use it send me an email off list and I will send it to you. I have version 19 of BobCad. Wayne Gene Heskett wrote: On Tuesday 12 February 2008, Jon Elson wrote: Is that something I could extract and use elsewhere Jon? Those fonts are probably copyright by Bobcad. Unless you can document that they are licensed for other uses, please don't pass them around. (If you insist on doing so, please don't talk about it here.) Regards, John Kasunich - 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] Request for Fonts
Gene, The Bobcad font is in the .FNT format if you can use it send me an email off list and I will send it to you. I have version 19 of BobCad. Wayne Gene Heskett wrote: On Tuesday 12 February 2008, Jon Elson wrote: Is that something I could extract and use elsewhere 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] UK suppliers of stepper motors and drive electronics?
On Tue, 2008-02-12 at 13:39 +, [EMAIL PROTECTED] wrote: Just a quickie. Can anyone recommend a UK supplier of stepper motors and associated drive electronics? eg just add mill, and computer running EMC. Mill is a light / middleweight Pinnacle universal job, XYZ travels are 400, 180, 150 mm with quill head having separate raise / lower facility and rotation about X and Y axes too. Buying a DRO today with GS500 series glass scales (5 micron) from www.machine-dro.co.uk so will hopefully be able to use output from linear scales as direct input into EMC computer, (phase 2 of the upgrade) max rapid speed of the scales is allegedly vastly in excess of anything I could need, so don't need 740 watt steppers... X table may weigh 200 lbs and perhaps another 150 for Y table, not trying to pull high G accelerations and a rapid of 300 mm per minute would be double what I'd be happy with. On a budget of course (aren't we all) but definitely prepared to pay a little more for something not prone to glitches such as interference on power rails etc causing missed steps. Doing it this way appeals to me for two reasons. 1/ redundancy, can use linear scales with either EMC computer or standalone DRO at will. 2/ eliminates backlash and screw mapping etc, linear scales will measure actual position of tables and quill. many thanks in advance. With the experience I have gained so far, it leads me to believe that you are making choices that may make your quest more difficult. If you are trying to have a CNC machine to make parts and spend as little as appropriate for that end, then you should consider studying other machines that are already proven to perform and copy their success. If you want to explore different methods of machine control, be prepared to spend allot more time, money and run into dead-ends. You will also need to be able to develop your own software because these days, hardware won't do anything without software. Successful stepper systems tend to be very consistent in their design, which doesn't include scale (or any) position feedback. The appeal of steppers is to not have the complexity of feedback, so if you are a stepper idealist, you would be corrupting the design with feedback. If a stepper system malfunctions, it is due to a flaw in the original design, tuning, or, part or maintenance failure. My take on the stepper theme is to anticipate all performance parameters and accommodate the requirements before hand. I need to admit that I have not built any stepper systems, but my attempt at using scales with a DC servo system proved a waste of time. Unfortunately I couldn't grasp why, until I saw the mode of failure which indicated to me that scales indeed give you position feedback, but what is needed is motor motion feedback. Scales aren't good at motor motion feedback because of backlash and other dynamics that real machines have. If you can accurately model the backlash and dynamics between table position and axis motor motion then maybe scales could be used, but currently you would be completely on your own to achieve this. Current systems control motor position and motion to a high degree and then achieve the required machine positional accuracy by eliminating positional flaws due to backlash and flex. Bottom line, I believe making parts and charting new motion control territory are very different pursuits with different rewards. -- 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] UK suppliers of stepper motors and drive
Dave I've got motors and drivers from http://www.motioncontrolproducts.com and was very pleased with price, service and range of choice. Good luck Andy [EMAIL PROTECTED] wrote: Just a quickie. Can anyone recommend a UK supplier of stepper motors and associated drive electronics? eg just add mill, and computer running EMC. Mill is a light / middleweight Pinnacle universal job, XYZ travels are 400, 180, 150 mm with quill head having separate raise / lower facility and rotation about X and Y axes too. Buying a DRO today with GS500 series glass scales (5 micron) from www.machine-dro.co.uk so will hopefully be able to use output from linear scales as direct input into EMC computer, (phase 2 of the upgrade) max rapid speed of the scales is allegedly vastly in excess of anything I could need, so don't need 740 watt steppers... X table may weigh 200 lbs and perhaps another 150 for Y table, not trying to pull high G accelerations and a rapid of 300 mm per minute would be double what I'd be happy with. On a budget of course (aren't we all) but definitely prepared to pay a little more for something not prone to glitches such as interference on power rails etc causing missed steps. Doing it this way appeals to me for two reasons. 1/ redundancy, can use linear scales with either EMC computer or standalone DRO at will. 2/ eliminates backlash and screw mapping etc, linear scales will measure actual position of tables and quill. many thanks in advance. - 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] UK suppliers of stepper motors and drive electronics.
On Tue, 2008-02-12 at 22:42 +, [EMAIL PROTECTED] wrote: With the experience I have gained so far, it leads me to believe that you are making choices that may make your quest more difficult. If you are trying to have a CNC machine to make parts and spend as little as appropriate for that end, then you should consider studying other machines that are already proven to perform and copy their success. If you want to explore different methods of machine control, be prepared to spend allot more time, money and run into dead-ends. You will also need to be able to develop your own software because these days, hardware won't do anything without software. whoa there, are you telling me EMC can't do PID? shirley not.. Not at all, EMC can do just about anything, if you know how. I may have stated it poorly, I'm just trying to indicate that making linear scales work, in a practical sense, with EMC's motion control, will be uncharted territory. My experience is that, scale feedback and backlash make for an unstable system. No one, that I know of, has been able to get PID to play well with backlash. The PID needs to react differently when in a region of backlash and no-backlash. EMC can do positional backlash compensation, so a solution may be to connect backlash compensation with a dynamic PID system. It's interesting to think about, it just hasn't been done yet. (The cool thing about EMC and Linux is that we are allowed to try. Long live the Penguin.) -- 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] OT: C Data Type Problem
The function CRC16 is used before it is declared. Either move the definition of CRC16 to before main, or declare it separately prior to its use. I notice that you are using (very) old style declarations in that code. Modern coders would write: unsigned short CRC16(unsigned char *puchMsg, unsigned short usDataLen)etcKen - Original Message - From: Kirk Wallace [EMAIL PROTECTED] To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Tuesday, February 12, 2008 5:29 PM Subject: [Emc-users] OT: C Data Type Problem At the risk of letting everyone know I am a C newbie. Oh ... you already know? I am getting: [EMAIL PROTECTED]:~/emc2/Modbus$ gcc -o modbus-1c modbus-1c.c modbus-1c.c:75: error: conflicting types for 'CRC16' modbus-1c.c:28: error: previous implicit declaration of 'CRC16' was here [EMAIL PROTECTED]:~/emc2/Modbus$ The offending code is here: http://www.wallacecompany.com/machine_shop/EMC2/modbus/modbus-1c.c I thought my call and return data types match, but some how they must not. Sometimes when I get messages I can't explain, I find it is because I haven't #incude'd something, but I played with some options that came to mind, without any luck. Can anyone point me in the proper direction? Thanks. -- 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 - 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] Request for Fonts
Gene Heskett wrote: On Monday 11 February 2008, Jon Elson wrote: Gene Heskett wrote: On Monday 11 February 2008, Jon Elson wrote: I have used Bobcad for this. Even an old version will work fine. It can take any True-Type font on your system and use that. I hacked up their internal vector font to clean up a couple rough characters, but if you want filled-in fonts, the True-Type ones work nice, they just take longer. How do you do the fill? Or is my version old?, all it does is the outline trace... Ummm, yeah, you are right, it DOESN'T fill in the interior, it only cuts the outline. I don't use the TT fonts with it, I use the one internal font that I modified, which is a non-outline font. Is that font mentioned in the docs? I haven't hit them since last spring when I was cutting the house and mailbox nameplates in kick panel brass. Yes, it is the bobcad default font, used for all drawing dimensions, for instance. This is on version 16.1, anyway. 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] Request for Fonts
Gene Heskett wrote: On Tuesday 12 February 2008, wp wrote: Gene, The Bobcad font is in the .FNT format if you can use it send me an email off list and I will send it to you. I have version 19 of BobCad. Wayne \ Humm, that sounds like a potential copyright problem, so I'll skip. I may be able to find something in a single line font on goldenweb.it, that's a great site to pull fonts from, probably sick bird here, but... The Hershey fonts (public domain, as long as they aren't in one particular data format) contain a single line font. Jeff Epler has them on his site: http://emergent.unpythonic.net/software/hershey A GPL'ed Hershey to g-code utility is on my to-do list, but I'm pretty busy at the moment, so don't hold your breath. Regards, John Kasunich - 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] UK suppliers of stepper motors and drive electronics?
[EMAIL PROTECTED] wrote: http://www.arceurotrade.co.uk/Catalogue/Stepper-Motors The 180Ncm will be big enough, and at ?18.50 at the moment ... The 3 Amp driver at ?28.95 each are a good option for driving them, so for under ?150 you have all the grunt. They will run direct off the parallel port, but a simple breakout board will be useful, and all one is missing is some DC power. 35V at a few amps does not cost a lot. Thanks to both who suggested this. I'm looking at the 220 Nm ACL571157525M steppers and the SMD093064 controller x 3. I would recommend the bigger driver with the 220Ncm motor - and a higher supply voltage. You will get as much power out of the 180Ncm motor with the smaller driver because it needs a lower voltage. The documentation doesn't show the method of connection to a PC. The sino glass scales terminate in one RS232 per each of the three axes. *NO* the glass scale produces quadrature signals - it just uses a 9 way 'D' connector. So, this useful breakout board which will accept 3 x whatever connectors the SMD controllers take plus the 3x RS232, presumably a PCI job? I'm not sure how EMC expects to get the quadrature inputs, but at least it would need a second parallel port, since most of the pins on the first parallel port are needed for the motors and other controls such as spindle and the like. Any hints and tips much appreciated. http://home.lsces.co.uk/ModelEngineersDigitalWorkshop/wiki/index.php?page=BreakoutBoard The PSU is no problemo. -- Lester Caine - G8HFL - Contact - http://home.lsces.co.uk/lsces/wiki/?page=contact L.S.Caine Electronic Services - http://home.lsces.co.uk MEDW - http://home.lsces.co.uk/ModelEngineersDigitalWorkshop/ Firebird - http://www.firebirdsql.org/index.php - 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] UK suppliers of stepper motors and drive electronics?
http://www.arceurotrade.co.uk/Catalogue/Stepper-Motors The 180Ncm will be big enough, and at ?18.50 at the moment ... The 3 Amp driver at ?28.95 each are a good option for driving them, so for under ?150 you have all the grunt. They will run direct off the parallel port, but a simple breakout board will be useful, and all one is missing is some DC power. 35V at a few amps does not cost a lot. Thanks to both who suggested this. I'm looking at the 220 Nm ACL571157525M steppers and the SMD093064 controller x 3. The documentation doesn't show the method of connection to a PC. The sino glass scales terminate in one RS232 per each of the three axes. So, this useful breakout board which will accept 3 x whatever connectors the SMD controllers take plus the 3x RS232, presumably a PCI job? Any hints and tips much appreciated. The PSU is no problemo. TIA - 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] UK suppliers of stepper motors and drive electronics?
http://www.arceurotrade.co.uk/Catalogue/Stepper-Motors The 180Ncm will be big enough, and at ?18.50 at the moment ... The 3 Amp driver at ?28.95 each are a good option for driving them, so for under ?150 you have all the grunt. They will run direct off the parallel port, but a simple breakout board will be useful, and all one is missing is some DC power. 35V at a few amps does not cost a lot. Thanks to both who suggested this. I'm looking at the 220 Nm ACL571157525M steppers and the SMD093064 controller x 3. The documentation doesn't show the method of connection to a PC. The sino glass scales terminate in one RS232 per each of the three axes. So, this useful breakout board which will accept 3 x whatever connectors the SMD controllers take plus the 3x RS232, presumably a PCI job? Any hints and tips much appreciated. The PSU is no problemo. TIA - 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] Stepper torque measurement article
Aram, measuring torque on an AC servos is definitely possible. It is not as simple as measuring current but this does give some feedback. I don't think that the current used by the servo drivers is a measure but you try Stan's setup that way. There are servo drivers with force-feedback but I an not sure if you would be able to add force-feedback to an existing machine / servo system. Maybe the easiest way is to add strain gauges, these are cheap can easily be mounted on any existing machine and you can 'calibrate' the output using a weight (with a pulley for X-Y direction). Force applied on your cutter tool will travel through the whole machine, but the further away the strain gauges are placed from your milling spindle, the more acceleration will influence the measurements. The strain gauges are long strips of electrical risistive material that will change their resistance when being pulled (or pushed) on. Glued to a piece of metal (rod or plate) the resistance varies when the metal is bent. Two placed on facing sides and connected into a wheatstone bridge give a real good feedback. I have a pair bicycle cranks operating this way (made by http://www.srm.de) : The bottom bracket is connected to the outer ring holding the chainwheel using a 4-armed spider (I have to guess but the arms are about 10x8 mm or so) and 4 gauges are glued on two facing arms and the resulting signal is converted into a frequency that is linear with the force applied. The system is calibrated (in Hz/Nm) once every two years and the zero point is determined (frequency at 0 Nm force) before each trip. Use force feedback using strain gauges and cutting using a constant force always looked good to me but that may be because I never got any proper training in machining :-) Regards, Rob Hi Can you measure torque on AC servo motor? Can I put that if torque exceed some certain level STOP machine or go to feed hold mode. It is very important because torque can directly show condition of cutter. If can stop machine when torque start increase I may or better will prevent break of cutter. I think in program need be include variable that limits maximum torque to axis. - 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] UK suppliers of stepper motors and drive electronics?
[EMAIL PROTECTED] wrote: Just a quickie. Can anyone recommend a UK supplier of stepper motors and associated drive electronics? eg just add mill, and computer running EMC. Mill is a light / middleweight Pinnacle universal job, XYZ travels are 400, 180, 150 mm with quill head having separate raise / lower facility and rotation about X and Y axes too. Buying a DRO today with GS500 series glass scales (5 micron) from www.machine-dro.co.uk so will hopefully be able to use output from linear scales as direct input into EMC computer, (phase 2 of the upgrade) max rapid speed of the scales is allegedly vastly in excess of anything I could need, so don't need 740 watt steppers... X table may weigh 200 lbs and perhaps another 150 for Y table, not trying to pull high G accelerations and a rapid of 300 mm per minute would be double what I'd be happy with. On a budget of course (aren't we all) but definitely prepared to pay a little more for something not prone to glitches such as interference on power rails etc causing missed steps. Doing it this way appeals to me for two reasons. 1/ redundancy, can use linear scales with either EMC computer or standalone DRO at will. 2/ eliminates backlash and screw mapping etc, linear scales will measure actual position of tables and quill. many thanks in advance. http://www.arceurotrade.co.uk/Catalogue/Stepper-Motors The 180Ncm will be big enough, and at £18.50 at the moment ... The 3 Amp driver at £28.95 each are a good option for driving them, so for under £150 you have all the grunt. They will run direct off the parallel port, but a simple breakout board will be useful, and all one is missing is some DC power. 35V at a few amps does not cost a lot. -- Lester Caine - G8HFL - Contact - http://home.lsces.co.uk/lsces/wiki/?page=contact L.S.Caine Electronic Services - http://home.lsces.co.uk MEDW - http://home.lsces.co.uk/ModelEngineersDigitalWorkshop/ Firebird - http://www.firebirdsql.org/index.php - 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] UK suppliers of stepper motors and drive electronics?
I got mine from at the model engineer ex http://www.arceurotrade.co.uk/Catalogue/Stepper-Motors in Leicester and seems they have some even cheaper since I bought mine Dave Caroline archivist on #emc FreeNode - 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] Turning Polygons on Lathe
On Tuesday 12 February 2008, Ian W. Wright wrote: On Monday 11 February 2008, Ian W. Wright wrote: For those who were fascinated by the polygon turning have a look at this - http://tinyurl.com/2wqbvl , it achieves the same ends but without any extra power or synchronisation of spindle and cutter! The video even gives a good indication of how you can make your own!!! Usual disclaimer - no connection with company etc. etc. Gene Heskett wrote: Now that's cute Ian. But the forces would seem to preclude my trying it on my little toy lathe. Hi Gene, I'm not sure that the cutting forces would be very great at all. If you look closely at the tools you will see that the front face is dished in creating a cutting edge around the front of the tool. So, coupled with the 1 degree clearance angle of the tool axis and the tool being smaller than the hole its cutting for internal splines etc., the cutting action is that of a knife. It would appear that the whole secret of this is in producing the tools with this sharp cutting edge at the front and then choosing one with an appropriate shape and relative size to the work. I think its a bit like the old 'Spirograph' toy Interesting for sure Ian, but I was born just north of Missouri and I think I'd have to see it done on simpler machinery than that was. :) -- 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) I don't deserve this award, but I have arthritis and I don't deserve that either. -- Jack Benny - 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] Turning Polygons on Lathe
On Tuesday 12 February 2008, Brian Pitt wrote: On Monday 11 February 2008 15:14, Gene Heskett wrote: On Monday 11 February 2008, Ian W. Wright wrote: For those who were fascinated by the polygon turning have a look at this - http://tinyurl.com/2wqbvl , it achieves the same ends but without any extra power or synchronisation of spindle and cutter! The video even gives a good indication of how you can make your own!!! Usual disclaimer - no connection with company etc. etc. Now that's cute Ian. But the forces would seem to preclude my trying it on my little toy lathe. with the angular offset and shearing action of the cutter they take allot less push than you'd think But its a full splines depth of cut in one pass, just with the force concentrated on one tooth at a time. You could still be pushing thru an 1/8 or more of steel per spline depending on how deep they were. but you have no controll of the orientation That could be a problem where one would need timing accuracy. That would be curable with cnc synch between spindles, but there isn't any in that setup. and you cant work behind a shoulder or swallow more than an inch or so of the part then again the polygon head wont do splines ,keyseats or internal work a few years ago someone made a CNC mill that would drill square holes like this http://upper.us.edu/faculty/smith/reuleaux.htm by syncing the table motion to the spindle position Neat, but would need way faster tables than I have. I'm sure someone somewhere has a use for that feature but I think they did it mainly to show off how fast the machine was ;) There is more than a little bit of the watch this, see what I can do available on the net these days, unforch a lot of it shot by folks with little knowledge of how to shoot such a project, so it isn't well done as far as seeing how it was done, most all of that is lost in the blur of the motion. Brian - 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 -- 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) I'm not proud. - 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] UK suppliers of stepper motors and drive electronics?
Just a quickie. Can anyone recommend a UK supplier of stepper motors and associated drive electronics? eg just add mill, and computer running EMC. Mill is a light / middleweight Pinnacle universal job, XYZ travels are 400, 180, 150 mm with quill head having separate raise / lower facility and rotation about X and Y axes too. Buying a DRO today with GS500 series glass scales (5 micron) from www.machine-dro.co.uk so will hopefully be able to use output from linear scales as direct input into EMC computer, (phase 2 of the upgrade) max rapid speed of the scales is allegedly vastly in excess of anything I could need, so don't need 740 watt steppers... X table may weigh 200 lbs and perhaps another 150 for Y table, not trying to pull high G accelerations and a rapid of 300 mm per minute would be double what I'd be happy with. On a budget of course (aren't we all) but definitely prepared to pay a little more for something not prone to glitches such as interference on power rails etc causing missed steps. Doing it this way appeals to me for two reasons. 1/ redundancy, can use linear scales with either EMC computer or standalone DRO at will. 2/ eliminates backlash and screw mapping etc, linear scales will measure actual position of tables and quill. many thanks in advance. - 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] Request for Fonts
On Tuesday 12 February 2008, John Kasunich wrote: Gene Heskett wrote: On Tuesday 12 February 2008, wp wrote: Gene, The Bobcad font is in the .FNT format if you can use it send me an email off list and I will send it to you. I have version 19 of BobCad. Wayne \ Humm, that sounds like a potential copyright problem, so I'll skip. I may be able to find something in a single line font on goldenweb.it, that's a great site to pull fonts from, probably sick bird here, but... The Hershey fonts (public domain, as long as they aren't in one particular data format) contain a single line font. Jeff Epler has them on his site: http://emergent.unpythonic.net/software/hershey A GPL'ed Hershey to g-code utility is on my to-do list, but I'm pretty busy at the moment, so don't hold your breath. Regards, John Kasunich Hershey fonts? Those date back to Jurassic park, the original, not the movie. I was around when Bill Barden was doing those, using a trs-80 Color Computer, and I think I may have a copy on my hard drive attached to my coco3. Now all I gotta do is find time to turn it on and do the search. - 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 -- 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) A handful of friends is worth more than a wagon of gold. - 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
