On 2014-06-30 01:10, Sebastian Kuzminsky wrote: > On 06/29/2014 06:28 AM, Marius Liebenberg wrote: >> I attached the component. It has been used as it is now and it works >> fine. I dont mind standing in for it. I will be testing it some more >> very soon on a real system so if there are any funnies, I will fix and >> report back. > Thanks for taking the lead on this, Marius. > > >> If you are not comfortable with it this way I could always >> submit a new component but I think that would be non productive. > Let's try to keep from forking this component. > > >> Maybe just to clarify the added line of code. It applies a change in the >> Z command over a period of time in stead of applying the new position in >> one go. This means that Z axis get a chance to change at a reasonable >> rate and leave very little chance of the motor slipping. It sort of >> simulates a controlled acceleration slope. > That sounds a bit like the limit3 component: > > http://www.linuxcnc.org/docs/2.6/html/man/man9/limit3.9.html > > Could you use that in a hal circuit to slew the Z at at controller rate? I looked at that in the beginning but because the Z position is not changed at any time during the move due to a Gcode instruction, we have to tamper with the position in the component. The z position change is also not predictable at any time so we have to try and control the z position and the rate of change on the fly. And when the move has ended, we have to correct the tampered position quickly in order for the gcodes to function correctly again. It might be possible to do from the outside but I thought it makes more sense to do all the calculations internal. It would also complicate the setup a bit more. This is the big problem with plasma and THC, it breaks the system in order to work. With plasma the work piece is not clamped static at one Z position but the Z of the work piece changes all the time. Not nice for CNC.
> -- Regards /Groete Marius D. Liebenberg +27 82 698 3251 +27 12 743 6064 QQ 1767394877 ------------------------------------------------------------------------------ Open source business process management suite built on Java and Eclipse Turn processes into business applications with Bonita BPM Community Edition Quickly connect people, data, and systems into organized workflows Winner of BOSSIE, CODIE, OW2 and Gartner awards http://p.sf.net/sfu/Bonitasoft _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
