I have EDM function without doubt. There is however a difference if on time is started to count at 28 volt or lower there are sparcs but if it start at around 35.0 volt there are not much sparcs.
Main current source is turned on during ignition and I suspect there are current flowing before on time counter is started, there is also possibility I got something wrong I checked voltage should be about right. I just added all parameters to protocol, think anyway or is it useful to measure ignition time? Regards Nicklas Karlsson On Sun, 26 Jun 2016 08:20:37 +0200 Roland Jollivet <[email protected]> wrote: > Put a 1uF cap across your spark gap. This will allow you to test whether > you have EDM function at all. > Even a 10uF cap. It will mess with your control, but you can now get a > handle on your fluid, and typical gap. > > Regards > Roland > > > On 25 June 2016 at 10:37, Nicklas Karlsson <[email protected]> > wrote: > > > I investigated further and it seems to matter at which voltage level start > > of period start to count. As is now current is on during wait for ignition > > and hence this period may be elongenated with a lover voltage level. Low > > enough and on time will not start until a sparc happen. > > > > I actually think either ignition current of 10mA is to low or resistance > > in EDM fluid is to low. > > > > I should finnish of the protocol before running more: > > 1. Off and on times. Sparc extinguishing voltage. Start of period > > voltage. > > 2. Measure current and voltage. Count number of sparc and ionization > > events. > > > > > > Regards Nicklas Karlsson > > > > > > > > On Fri, 24 Jun 2016 18:15:03 -0700 > > dengvall <[email protected]> wrote: > > > > > I've not played with EDM for quite a while. > 10 years so I've > > > forgotten most of what I knew. > > > I know of people that used hardware store lantern oil as EDM fluid. If > > > it sounds like frying bacon > > > you are in the right range. > > > Sounds (npi) like fun. :-) > > > > > > Dave > > > > > > On 06/19/2016 10:07 AM, Nicklas Karlsson wrote: > > > >> On 06/19/16 17:55, Nicklas Karlsson wrote: > > > >>> I tried to tune parameters manually but most of the time is spent > > either in short circuit or open circuit, > > > >> this is called 'hammering' > > > >> it actually works but for a poor reason. > > > >> if the tools is too far away, you are open > > > >> if the tool is too close, it is shorting > > > >> For a brief time in transit between these 2 states you DO achieve the > > > >> proper position > > > >> and you get _some_ sparks. > > > >> > > > >> the idea is to find the ideal position where sparks occur easily > > > >> yiu can find this if you can control the 'edm servo'. > > > > Then I now how it should look. I didn't expect something good with my > > Lego prototype without proper tuning and to low ignition voltage at the > > first run. > > > > > > > >> ... > > > > You provided exactly the information I needed, thanks! > > > > > > > > > > > > Regards Nicklas Karlsson > > > > > > > > > > > > > > ------------------------------------------------------------------------------ > > > > What NetFlow Analyzer can do for you? Monitors network bandwidth and > > traffic > > > > patterns at an interface-level. Reveals which users, apps, and > > protocols are > > > > consuming the most bandwidth. Provides multi-vendor support for > > NetFlow, > > > > J-Flow, sFlow and other flows. Make informed decisions using capacity > > planning > > > > reports. http://sdm.link/zohomanageengine > > > > > > > > > > > > _______________________________________________ > > > > Emc-users mailing list > > > > [email protected] > > > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > > > ------------------------------------------------------------------------------ > > > Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San > > > Francisco, CA to explore cutting-edge tech and listen to tech luminaries > > > present their vision of the future. This family event has something for > > > everyone, including kids. Get more information and register today. > > > http://sdm.link/attshape > > > _______________________________________________ > > > Emc-users mailing list > > > [email protected] > > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > ------------------------------------------------------------------------------ > > Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San > > Francisco, CA to explore cutting-edge tech and listen to tech luminaries > > present their vision of the future. This family event has something for > > everyone, including kids. Get more information and register today. > > http://sdm.link/attshape > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------------ > Attend Shape: An AT&T Tech Expo July 15-16. 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