hey dave I hear you. I might get good at coding myself soon.. but would love to solve the problem.
I don't think the spindle load could really help much though. I am machining plastic and aluminium and the spindle load doesn't noticeably change in corners. I more need a limit on the initial acceleration for a split second I suppose or go the full way and have something that analyzes the G code path and calculates the best speed and path for the machine regards Andrew regards On Tue, Sep 22, 2020 at 11:35 AM dave engvall <dengv...@charter.net> wrote: > HI Andrew, > Just because I have ideas does not imply I can implement them. ;-) > However, I believe there is a velocity pin that might be used to slow > down in corners. Since the spindle loads up going thru corners it may be > possible to monitor spindle load and back off velocity thru the corner > which should make milling a bit smoother. Adding jerk control involves , > as you know, adding another order to motion. (see first sentence). ;-) > A lot of bright people are involved in linuxcnc but they all have their > own pet projects. Just the way it goes. > Hang in there, your heart is in the right place. > > Dave > > On 9/20/20 8:19 PM, andrew beck wrote: > > Hey guys > > > > just a few thoughts here. > > > > I have a high speed cnc machining center (cnc mill) > > > > it has 16mm pitch ballscrews and weighs 6ton > > > > linuxcnc is awesome and does a great job controlling it. I make plastic > > injection molds and lots of 3d machining all the time. plus all the > little > > jobs that a cnc is great for. > > > > I think the only thing lacking from linuxcnc for my use is some sort of > > jerk control for corners. there may already be something around that > > solves the issue though without jerk control. so what happens is when > the > > machine changes direction the whole machine vibrates and jumps around. > its > > quite bad. enough that I may rubber mount the electrical box lol. > > > > I have accelerations of 750 (i think it is mm/sec2) > > > > and max rapids of 8m/min > > > > I would love to turn those up to like 25m/min rapid and 2000mm/sec2 > > accelerations > > > > has any one tried any form of jerk control yet on linuxcnc? or wants to > > have a play and code it. I have 3 6 ton cnc machines that will all use > > linuxcnc so very keen to solve this jerk control issue. > > > > regards > > > > Andrew > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
