Hi Greg, Sorry for taking so long to answer. I've been working on the trajectory planner recently, so I can try to weigh in on your question. First of all, I'm curious what the application for this would be. Do you use it as a "one-off" move, or would you run a whole program this way?
It seems like this mode could useful when you have a program to do detailed profiling with short segments. The default planner would make a velocity profile that has more of a stair-step shape, since it will accelerate as fast it can to the requested speed. This is a minor change in the trajectory planner. The bigger issue is how we'd want to control this mode. One way could be to create a new G-code, similar to G61 / G64. It could also be done by HAL-pin, if you didn't need to switch between modes during a program. I'm curious what others think about this. Would anyone else find this useful? -Rob On Wed, Dec 18, 2013 at 7:17 PM, Greg Bentzinger <skullwo...@yahoo.com>wrote: > (Ok here I am mumbling into a microphone before the crowd... ) > > But going way, way, way back ( Picture in your minds eye teletypes and > paper tape programs...) I had always wanted a ramped feed rate command. > > Like > > G1 X1. Z-.25 F20. > ( ramp command) X4. Z-1. F5. > > So that the move from X1. Z-.25 to X4. Z-1. would start at F20. and slow > to F5. by completion of the move. > > This could be a one shot ( like a G04 ) or modal, or both. > > Another use would be for a part off lathe tool being fed in FeedPerMin vrs > FeedPerRevolution. > > Same could apply to feeding a tapered ream, start at F.02 end at F.002 ( > FPR ) > > Often there are other easy ways to do things, but sometimes it would be > the best method - were it available. > > Just thinking outloud > > Greg > > > ------------------------------------------------------------------------------ > Rapidly troubleshoot problems before they affect your business. Most IT > organizations don't have a clear picture of how application performance > affects their revenue. With AppDynamics, you get 100% visibility into your > Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics > Pro! > http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
