[Emc-users] bad links
On the page 'http://wiki.linuxcnc.org/cgi-bin/wiki.pl?RaspbianXenomaiBuild' at the bottom under '9. Pre-built image' the link 'http://87.106.51.120/downloads/xenomai.img' returns 404 and the link 'http://filecloud.io/_0vew6zmj' will not accept the given username and password. Or is it just me? -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] bad links
On 17 March 2015 at 20:24, kqt4a...@gmail.com wrote: On the page 'http://wiki.linuxcnc.org/cgi-bin/wiki.pl?RaspbianXenomaiBuild' at the bottom under '9. Pre-built image' the link 'http://87.106.51.120/downloads/xenomai.img' returns 404 and the link 'http://filecloud.io/_0vew6zmj' will not accept the given username and password. LinuxCNC does not support Xenomai. Like much else on the Wiki that page is obsolete and outdated. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] PCB adapters for oscilloscope probes
Hi everyone, please excuse this question very unrelated to LinuxCNC, but I know that here are quite some people around who are familiar with scopes and high-frequency measurements. Some who like Tek and some who don't ;) Anyway, I've got a project where I need to measure signals with frequencies in the range 10Mhz .. 100Mhz without loading the driver itself too much (the goal is to figure out how a current control loop behaves at these frequencies, so I should not add much more phase lag just by attaching the probe). Tektronix probes of type P6158 (http://www.tek.com/sites/tek.com/files/media/media/resources/60W_12026_2_0.pdf) are available, so this is ok. What we haven't a large amount of, however, are those PCB adapters (the ones with the four ground pins, where you can stick the probe vertically into). Something like this: http://hb9etc.ch/images/tek_probe_adapter_131-4244-00.png Now the question: Does anyone here have an idea how or where to get some spares of those adapters? The part# 131-4244-00 does not seem to exist anymore. In the probe datasheet, there is 131-5031-00 listed for those adapters, but market results aren't much better for those. What I found so far is a product on Amazon: http://www.amazon.com/Tektronix-131-5031-00-Tip-Probe/dp/B00DJS7BMU This could probably be the right thing, but $184 for 25 of those thingies is also quite a number. Might be worth it, but still, if anyone has a better idea/source/offer/whatever, please tell me. Thanks! Cheers, Philipp signature.asc Description: OpenPGP digital signature -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] PCB adapters for oscilloscope probes
It is possible to hold probe a little bit above the point, amplitude will however not be accurate. Rugoski coil is also useful for high frequency measurements of currents but not low frequency or DC. Nicklas Karlsson On Tue, 17 Mar 2015 22:21:45 +0100 Philipp Burch p...@hb9etc.ch wrote: Hi everyone, please excuse this question very unrelated to LinuxCNC, but I know that here are quite some people around who are familiar with scopes and high-frequency measurements. Some who like Tek and some who don't ;) Anyway, I've got a project where I need to measure signals with frequencies in the range 10Mhz .. 100Mhz without loading the driver itself too much (the goal is to figure out how a current control loop behaves at these frequencies, so I should not add much more phase lag just by attaching the probe). Tektronix probes of type P6158 (http://www.tek.com/sites/tek.com/files/media/media/resources/60W_12026_2_0.pdf) are available, so this is ok. What we haven't a large amount of, however, are those PCB adapters (the ones with the four ground pins, where you can stick the probe vertically into). Something like this: http://hb9etc.ch/images/tek_probe_adapter_131-4244-00.png Now the question: Does anyone here have an idea how or where to get some spares of those adapters? The part# 131-4244-00 does not seem to exist anymore. In the probe datasheet, there is 131-5031-00 listed for those adapters, but market results aren't much better for those. What I found so far is a product on Amazon: http://www.amazon.com/Tektronix-131-5031-00-Tip-Probe/dp/B00DJS7BMU This could probably be the right thing, but $184 for 25 of those thingies is also quite a number. Might be worth it, but still, if anyone has a better idea/source/offer/whatever, please tell me. Thanks! Cheers, Philipp -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] VFD causing limits to trip. Huh?
On Mon, Mar 16, 2015 at 4:40 PM, Karlsson Wang nicklas.karls...@karlssonwang.se wrote: I think you are right and will just try to dig a little bit deeper. A shield is primarily intended to prevent electrostatic coupling from the outside world. So by grounding in the consuming end the shield will get the ground potential of the consumer and the signal cables will be shielded from different external electric fields. This should motivate why as you say the shield should be connected in this end only. If there are current there is also a potential difference. I consider the VFD to be a noise source since it have common mode voltage which will emit an electrical field. There is also a capacitance between the VFD cables and shield. Since Shield impedance on high frequency is far from zero the shield around the VFD cables will not be at GND potential. The most common method is to increase common mode inductance by a filter but I have also seen active filters which reduce the common mode voltage and multiple step voltage inverters. Nicklas Karlsson A shield has two primary jobs - keep interference from the outside getting in, and keeping the signal inside the shield from getting out. Mark -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] DIY CNC MILL LATHE
Last post seems to have got lost. https://www.youtube.com/watch?v=sFrVdoOhu1Q This is quite something. Using, amongst other things, granite blocks, flat within 1 micron Cheers Wallace. -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Debug print in Gcode
Explained at http://linuxcnc.org/docs/html/gcode/overview.html#sec:messages debug being a special case of msg As I thought but there must be a problem with my stuff cause I dont see any message from the Gcode. Dave Caroline On 17/03/2015, Marius Liebenberg mar...@mastercut.co.za wrote: Can someone please tell me where does the debug statement in Gcode print its output? - Regards / Groete Marius D. Liebenberg +27 82 698 3251 +27 12 746 6064 -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Debug print in Gcode
Explained at http://linuxcnc.org/docs/html/gcode/overview.html#sec:messages debug being a special case of msg Dave Caroline On 17/03/2015, Marius Liebenberg mar...@mastercut.co.za wrote: Can someone please tell me where does the debug statement in Gcode print its output? - Regards / Groete Marius D. Liebenberg +27 82 698 3251 +27 12 746 6064 -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] VFD causing limits to trip. Huh?
On Tue, Mar 17, 2015 at 5:49 AM, Nicklas Karlsson nicklas.karls...@karlssonwang.se wrote: Yes a shield has two primary jobs but ground impedance is far from zero at high frequency. The shield will not stay at fixed potential at high frequency for a noise source. If there are three-phase input and a ground Cable summed current thru all four may be zero but there may be a current flow from the three-phase Cable to to ground cable. At high frequency impedance in ground cable is far from zero and there will noise on the ground cable. Nicklas Karlsson True, but as Bertho pointed out, there are a few different ways to skin a cat when it comes to shielding stray noise. Filters can be added to the cable to suppress or allow certain frequency bands, and where and how you ground the shield can also have a lot to do with what you are actually shielding from or for. Mark -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Debug print in Gcode
Can someone please tell me where does the debug statement in Gcode print its output? - Regards / Groete Marius D. Liebenberg +27 82 698 3251 +27 12 746 6064 -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] VFD causing limits to trip. Huh?
Yes a shield has two primary jobs but ground impedance is far from zero at high frequency. The shield will not stay at fixed potential at high frequency for a noise source. If there are three-phase input and a ground Cable summed current thru all four may be zero but there may be a current flow from the three-phase Cable to to ground cable. At high frequency impedance in ground cable is far from zero and there will noise on the ground cable. Nicklas Karlsson On Mon, Mar 16, 2015 at 4:40 PM, Karlsson Wang nicklas.karls...@karlssonwang.se wrote: I think you are right and will just try to dig a little bit deeper. A shield is primarily intended to prevent electrostatic coupling from the outside world. So by grounding in the consuming end the shield will get the ground potential of the consumer and the signal cables will be shielded from different external electric fields. This should motivate why as you say the shield should be connected in this end only. If there are current there is also a potential difference. I consider the VFD to be a noise source since it have common mode voltage which will emit an electrical field. There is also a capacitance between the VFD cables and shield. Since Shield impedance on high frequency is far from zero the shield around the VFD cables will not be at GND potential. The most common method is to increase common mode inductance by a filter but I have also seen active filters which reduce the common mode voltage and multiple step voltage inverters. Nicklas Karlsson A shield has two primary jobs - keep interference from the outside getting in, and keeping the signal inside the shield from getting out. Mark -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] VFD causing limits to trip. Huh?
On 03/17/2015 12:33 AM, Karlsson Wang wrote: The frequency converters I have seen for electric motors generate a square wave voltage. To generate a sinus the duty cycle is varied to get sinus voltage in average and usually the current is close to sinus. Most modern converters are class D amplifiers. One main difference is in the headroom they provide in the switch-frequency. The cheaper ones have about one order of magnitude headroom whereas the really good ones have up to two orders of magnitude headroom, frequency wise (switch frequency vs. output frequency). There is a trade-off between output accuracy and cost of switching and filtering. It all comes down to money ;-) Second, as you note, the current may be sinusoidal, but that does not mean that the voltage is sinusoidal. A motor is an inductive load, where the voltage and current are not in phase. This results in a problem for control loops where you have to choose between current based or voltage based regulation. Both have merits, but ultimately, the result of the output is in the quality of the filters in the VFD and the impedance matching between VFD, cabling and motor, which have to span a considerable frequency range. Then it come to quality I guess the large difference is in filters and coupling to control signal ground. There exist true sinus output but I think all of them are sold as true sinus for a higher price. Yes. The filters are very important. But you have to look at the system as a whole to build a good one. Components must be matched properly for best results. Non-sinusoidal drivers may be adequate for many systems, but when the power goes up, the EMI pollution generally increases too. It is a question of keeping EMI under control. Eliminating it completely is utopia. -- Greetings Bertho (disclaimers are disclaimed) -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] PCB adapters for oscilloscope probes (Philipp Burch)
I just looked at your mentioned Textronix probe Phillip. U shouldn't use such a probe if you want low interference because it has a very high RC load in the R component. Maybe U should use a classic 10M Ohm probe instead and connect that to a 1 MOhm scope? My impression is that your probe is designed for 50 Ohm RF circuitry and that the 1KOhm-probe is supposed to be a calculated load in that circuitry. /Roger @lists.sourceforge.net To subscribe or unsubscribe via the World Wide Web, visit https://lists.sourceforge.net/lists/listinfo/emc-users or, via email, send a message with subject or body 'help' to emc-users-requ...@lists.sourceforge.net You can reach the person managing the list at emc-users-ow...@lists.sourceforge.net When replying, please edit your Subject line so it is more specific than Re: Contents of Emc-users digest... Today's Topics: 1. Re: bad links (andy pugh) 2. PCB adapters for oscilloscope probes (Philipp Burch) 3. Re: PCB adapters for oscilloscope probes (Karlsson Wang) 4. Re: PCB adapters for oscilloscope probes (Philipp Burch) 5. Re: PCB adapters for oscilloscope probes (andy pugh) 6. Re: PCB adapters for oscilloscope probes (Bertho Stultiens) 7. Re: PCB adapters for oscilloscope probes (Florian Rist) 8. Re: PCB adapters for oscilloscope probes (Florian Rist) -- Message: 1 Date: Tue, 17 Mar 2015 20:36:25 + From: andy pugh bodge...@gmail.com Subject: Re: [Emc-users] bad links To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Message-ID: CAN1+YZV3a6PWFD0tUpPzGE==tdauef3tjkkihlyhvo_rdnr...@mail.gmail.com Content-Type: text/plain; charset=UTF-8 On 17 March 2015 at 20:24, kqt4a...@gmail.com wrote: On the page 'http://wiki.linuxcnc.org/cgi-bin/wiki.pl?RaspbianXenomaiBuild' at the bottom under '9. Pre-built image' the link 'http://87.106.51.120/downloads/xenomai.img' returns 404 and the link 'http://filecloud.io/_0vew6zmj' will not accept the given username and password. LinuxCNC does not support Xenomai. Like much else on the Wiki that page is obsolete and outdated. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Message: 2 Date: Tue, 17 Mar 2015 22:21:45 +0100 From: Philipp Burch p...@hb9etc.ch Subject: [Emc-users] PCB adapters for oscilloscope probes To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Message-ID: 55089ae9.4090...@hb9etc.ch Content-Type: text/plain; charset=utf-8 Hi everyone, please excuse this question very unrelated to LinuxCNC, but I know that here are quite some people around who are familiar with scopes and high-frequency measurements. Some who like Tek and some who don't ;) Anyway, I've got a project where I need to measure signals with frequencies in the range 10Mhz .. 100Mhz without loading the driver itself too much (the goal is to figure out how a current control loop behaves at these frequencies, so I should not add much more phase lag just by attaching the probe). Tektronix probes of type P6158 (http://www.tek.com/sites/tek.com/files/media/media/resources/60W_12026_2_0.pdf) are available, so this is ok. What we haven't a large amount of, however, are those PCB adapters (the ones with the four ground pins, where you can stick the probe vertically into). Something like this: http://hb9etc.ch/images/tek_probe_adapter_131-4244-00.png Now the question: Does anyone here have an idea how or where to get some spares of those adapters? The part# 131-4244-00 does not seem to exist anymore. In the probe datasheet, there is 131-5031-00 listed for those adapters, but market results aren't much better for those. What I found so far is a product on Amazon: http://www.amazon.com/Tektronix-131-5031-00-Tip-Probe/dp/B00DJS7BMU This could probably be the right thing, but $184 for 25 of those thingies is also quite a number. Might be worth it, but still, if anyone has a better idea/source/offer/whatever, please tell me. Thanks! Cheers, Philipp -- next part -- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 473 bytes Desc: OpenPGP digital signature -- Message: 3 Date: Tue, 17 Mar 2015 23:09:10 +0100 From: Karlsson Wang nicklas.karls...@karlssonwang.se Subject: Re: [Emc-users] PCB adapters for oscilloscope probes To: Enhanced Machine Controller \(EMC\) emc-users@lists.sourceforge.net Message-ID: 20150317230910.5f7a293dddc8733f85338...@karlssonwang.se Content-Type: text/plain; charset=US-ASCII It is possible to hold probe a little bit above the point, amplitude will however not be accurate. Rugoski coil is also useful for high frequency measurements of currents but not low frequency or DC. Nicklas Karlsson On
[Emc-users] PCB adapters for oscilloscope probes (Philipp Burch)
Imho , Are U sure U need any particular measurement point device for your pcb Philipp? At those frequencies U mention U just need a simple pin and a common ground point at your card to make the measurement. In my days as an RF repair engineer i hooked my probe at those points with my integrated 1:10 attenuator an did my measurement with no or little interference from the probe. /Roger -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] PCB adapters for oscilloscope probes
On 17 March 2015 at 22:16, Philipp Burch p...@hb9etc.ch wrote: Unfortunately, amplitude is quite something that matters. According to my simulations, the loading of the mentioned probe should be ok, it really only the problem of securely attaching it for doing the measurements. Could you use SMA or microdot connectors instead (and not use an actual test probe?) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] PCB adapters for oscilloscope probes
Hi Nicklas! On 17.03.2015 23:09, Karlsson Wang wrote: It is possible to hold probe a little bit above the point, amplitude will however not be accurate. Rugoski coil is also useful for high frequency measurements of currents but not low frequency or DC. Unfortunately, amplitude is quite something that matters. According to my simulations, the loading of the mentioned probe should be ok, it really only the problem of securely attaching it for doing the measurements. It is not a single-shot thing, I'll need to take hundreds of waveforms without readjusting the probe, so manually holding it on or somewhere near the testpoint is not really an option. Regards, Philipp On Tue, 17 Mar 2015 22:21:45 +0100 Philipp Burch p...@hb9etc.ch wrote: Hi everyone, please excuse this question very unrelated to LinuxCNC, but I know that here are quite some people around who are familiar with scopes and high-frequency measurements. Some who like Tek and some who don't ;) Anyway, I've got a project where I need to measure signals with frequencies in the range 10Mhz .. 100Mhz without loading the driver itself too much (the goal is to figure out how a current control loop behaves at these frequencies, so I should not add much more phase lag just by attaching the probe). Tektronix probes of type P6158 (http://www.tek.com/sites/tek.com/files/media/media/resources/60W_12026_2_0.pdf) are available, so this is ok. What we haven't a large amount of, however, are those PCB adapters (the ones with the four ground pins, where you can stick the probe vertically into). Something like this: http://hb9etc.ch/images/tek_probe_adapter_131-4244-00.png Now the question: Does anyone here have an idea how or where to get some spares of those adapters? The part# 131-4244-00 does not seem to exist anymore. In the probe datasheet, there is 131-5031-00 listed for those adapters, but market results aren't much better for those. What I found so far is a product on Amazon: http://www.amazon.com/Tektronix-131-5031-00-Tip-Probe/dp/B00DJS7BMU This could probably be the right thing, but $184 for 25 of those thingies is also quite a number. Might be worth it, but still, if anyone has a better idea/source/offer/whatever, please tell me. Thanks! Cheers, Philipp signature.asc Description: OpenPGP digital signature -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] PCB adapters for oscilloscope probes
Hi Philipp Now the question: Does anyone here have an idea how or where to get some spares of those adapters? Do you have other probes available as well? It's much easier to find these adapters for 2.5 mm probes. http://www.digikey.com/product-detail/en/PK106-4/PK106-4-ND/3587113 http://www.keysight.com/en/pd-2422998-pn-N4864A/25-mm-probe-tip-to-pcb-adaptor-vertical?cc=ATlc=ger Using your probes, don't you think you'd bee good just using any suitable receptacle for the tip and the ground spring contact on the probe to connect to a ground plane? You could extract a single pin from precision DIL socket for the probe tip. If you need 'full' pcb adapter for the 3.5mm probes and since this is the LinxCNC mailing list, you could get a few carrier DIL socket for the center pin and mill the outer sleeve from a piece of brass. https://www.buerklin.com/de/katalog/Carrier-IC-Fassungen-Typ-MPE-GARRY-MC-Metal-Carrier-DIL-B091000.html (I'm not 100% sure if a standard probe tip fits in..) See you Flo -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] PCB adapters for oscilloscope probes
Hi Could you use SMA or microdot connectors instead (and not use an actual test probe?) This is most probably not an option, as Philipp has to minimise the influence of the probe on the signal. But the SMA connector might be a good idea, still. A SMB jack has a outer diameter of about 3.6 mm, close to the probe's one. So a straight PCB mount SMC plug might be able to hold the probe, not as good as the suitable adapter would, but it might work. http://uk.rs-online.com/web/p/smb-connectors/2508694170/ See you Flo -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] PCB adapters for oscilloscope probes
On 03/17/2015 10:21 PM, Philipp Burch wrote: Now the question: Does anyone here have an idea how or where to get some spares of those adapters? The part# 131-4244-00 does not seem to exist anymore. I'd take a small PCB with copper on both sides, drill a couple of holes the right place and size, put four small pogo-pins in there and line/solder the edge. The center-hole would have mounted one of the spring-groundings soldered on the PCB to hold the lot and make a proper ground connection on both sides of the PCB. Such setup, when small enough and grounded properly should be a relatively good substitude IMO. -- Greetings Bertho (disclaimers are disclaimed) -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] PCB adapters for oscilloscope probes
On Tue, 17 Mar 2015, Philipp Burch wrote: Date: Tue, 17 Mar 2015 22:21:45 +0100 From: Philipp Burch p...@hb9etc.ch Reply-To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: [Emc-users] PCB adapters for oscilloscope probes Hi everyone, please excuse this question very unrelated to LinuxCNC, but I know that here are quite some people around who are familiar with scopes and high-frequency measurements. Some who like Tek and some who don't ;) Anyway, I've got a project where I need to measure signals with frequencies in the range 10Mhz .. 100Mhz without loading the driver itself too much (the goal is to figure out how a current control loop behaves at these frequencies, so I should not add much more phase lag just by attaching the probe). Tektronix probes of type P6158 (http://www.tek.com/sites/tek.com/files/media/media/resources/60W_12026_2_0.pdf) are available, so this is ok. What we haven't a large amount of, however, are those PCB adapters (the ones with the four ground pins, where you can stick the probe vertically into). Something like this: http://hb9etc.ch/images/tek_probe_adapter_131-4244-00.png Now the question: Does anyone here have an idea how or where to get some spares of those adapters? The part# 131-4244-00 does not seem to exist anymore. In the probe datasheet, there is 131-5031-00 listed for those adapters, but market results aren't much better for those. What I found so far is a product on Amazon: http://www.amazon.com/Tektronix-131-5031-00-Tip-Probe/dp/B00DJS7BMU This could probably be the right thing, but $184 for 25 of those thingies is also quite a number. Might be worth it, but still, if anyone has a better idea/source/offer/whatever, please tell me. Thanks! Cheers, Philipp One easy way if you dont have many spots to probe and you control the PCB design is dispense with the probe and use a small coax connector and make a built in passive probe on the PCB. A 949 Ohm SO6 resistor into the center pin of the coax (and using 50 Ohm coax and scope input) will give you a passive probe about equivalent to the 6158 (well maybe 1 GHz bandwidth instead of 3) Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your ()_() signature to help him gain world domination. -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] DIY CNC MILL LATHE
On 17 Mar 2015, at 09:54, Marshland Engineering wrote: Last post seems to have got lost. I got both ok. https://www.youtube.com/watch?v=sFrVdoOhu1Q This is quite something. Using, amongst other things, granite blocks, flat within 1 micron Watched the video and some of the others. That lathe is the bees knees right enough. An outstanding project. I notice it uses air bearings for most moving surfaces, and I wonder how much that limits the loads it can bear. I noticed the builder did say quite clearly it was for small loads, but I wonder what he means by small? At what kind of loads does an air bearing stop bearing? I also noticed his joysticks integrated into the apron. Nice touch. Marcus Cheers Wallace. -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Debug print in Gcode
On March 17, 2015 4:04:14 AM MDT, Marius Liebenberg mar...@mastercut.co.za wrote: Explained at http://linuxcnc.org/docs/html/gcode/overview.html#sec:messages debug being a special case of msg As I thought but there must be a problem with my stuff cause I dont see any message from the Gcode. Which GUI are you using? -- Sebastian Kuzminsky -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] DIY CNC MILL LATHE
Wallace, Just a FYI, I got the email. Watched a couple of others, and I'm planning on watching the whole series. Not that I'm likely to ever own a water jet cutter. Raymond Julian Kettle River, MN The things we admire in men, kindness and generosity, openness, honesty, understanding and feeling are the concomitants of failure in our system. And those traits we detest, sharpness, greed, acquisitiveness, meanness, egotism and self-interest are the traits of success. And while men admire the quality of the first they love the produce of the second. -John Steinbeck, novelist, Nobel laureate (1902-1968) On 03/17/2015 04:54 AM, Marshland Engineering wrote: Last post seems to have got lost. https://www.youtube.com/watch?v=sFrVdoOhu1Q This is quite something. Using, amongst other things, granite blocks, flat within 1 micron Cheers Wallace. -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
