> Hi Ray. > I am thinking about CNC machine that can safe way interact with human > (people). > That machine must be one with which person can wrestle with without danger > to get injure. for example massage ( CNC programmable)machine. > That is why i want to use M80 47 code (M80 electric current overwrite, for > 47% from maximum level). I think also need M85 code that show for how long > overwrite - like 1 -4 minute until machine go into Alarm mode. > > With code M80 and M85 in place person/human can be safe way deal with CNC > programmable machine. I forgot about M90 - to program how accurate machine shout be. for example M90 1.500 means that if machine in + /- 1.5" from target place it is OK , and go to the next block. For massage machine accuracy +/- 1.5" will be good enough, i think
> Today many medical thing will be given to robots (CNC driven machine) and > it will be important part of overall economy. > > thanks > Aram > > >> >> A servo system like you are using runs torque (amps) up or down >> depending upon how big the difference between commanded and actual >> position is. That delta is computed in the EMC but is implemented by >> the motor drive. The tuning of your motor drive is a critical part of >> what you want. >> >> The second part of this is related to the EMC. In the EMC and most >> other motion control systems I've encountered you normally tune PID and >> Feed forwards to produce the desired motor characteristics including >> torque. After that tuning is done properly you can adjust commanded >> position to control motor torque. But that tuning is a static or >> constant sort of thing. Some systems watch spindle load and will change >> tools when the load reaches a certain critical point. >> >> My thinking is that you'd need to add in some feed override so that you >> get good cutting, reduce chatter, or meet a machinist's feel for the >> cut. EMC, through HAL has adaptive feedrate control that could be >> hooked up to say a summed or weighted average of following error for the >> relevant axes. Such a system might do what I imagine that you are >> asking. >> >> Rayh >> >> >> On Sun, 2010-04-18 at 02:00 -0600, a...@conceptmachinery.com wrote: >>> Hi >>> I want to ask about electric current that turns AC servomotor in EMC2. >>> I think EMC2 works like that: Tool move with lowest electric current. >>> When >>> tool is encounter resistance from work part etc. EMC2 increase electric >>> current to overcome that resistance. Increase electric current >>> translates >>> into increase of torque from AC servomotor. >>> Can I control that electric current? >>> How is possible to put overwrite 0% to 100% that electric current? >>> If I set overwrite to 100% than system behaves as it is. If I set >>> overwrite to 0% than system does not move. If I set overwrite to 10% >>> than >>> smallest resistance to tool will stop machine. When resistance reduced >>> than machine move to execute next bock of code. >>> >>> Can it be M code (machine code)? M80 47. (etc) >>> Means 47% electric current overwrite. >>> >>> Thanks >>> Aram >>> >>> >>> >>> >>> ------------------------------------------------------------------------------ >>> Download Intel® Parallel Studio Eval >>> Try the new software tools for yourself. Speed compiling, find bugs >>> proactively, and fine-tune applications for parallel performance. >>> See why Intel Parallel Studio got high marks during beta. >>> http://p.sf.net/sfu/intel-sw-dev >>> _______________________________________________ >>> Emc-users mailing list >>> Emc-users@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/emc-users >> >> >> ------------------------------------------------------------------------------ >> Download Intel® Parallel Studio Eval >> Try the new software tools for yourself. Speed compiling, find bugs >> proactively, and fine-tune applications for parallel performance. >> See why Intel Parallel Studio got high marks during beta. >> http://p.sf.net/sfu/intel-sw-dev >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > > > ------------------------------------------------------------------------------ > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
