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
