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. 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
