Hi Rob! On 12/26/2013 07:14 PM, Robert Ellenberg wrote: > 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?
I'd be very happy with another G-code for controlling this behaviour. I need something like this for a dispenser already, where it is required to decelerate slowly while applying a line of glue, so that the line gets thicker to the end. The workaround is now as you described with a "stair-step" shape, i.e. the line is simply divided into a few segments of decreasing feed. A built-in method for this would obviously greatly simplify the program. Instead of a G-code, I could also live with something more "exotic", like two F words on the same line. If the parser can handle this, of course. But the dedicated G-code is probably better when concerning compatibility to other interpreters. Keep up the great work :) Regards, Philipp > > 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 >
signature.asc
Description: OpenPGP digital signature
------------------------------------------------------------------------------ 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
