Thank you all for considering my problem. It made the situation clearer for me. I already have feed override from a pot in place. This changes extrusion rate proportional to x-y travel so it does not affect the "fill factor"
I think I will try to change the A-axis to velocity mode and put a HAL component in series that takes the derivative of commanded position and multiplies it with a controllable scale factor, this vill be velocity command for A. // Lars > -----Original Message----- > From: Karl Cunningham [mailto:[email protected]] > Sent: den 19 januari 2012 06:15 > To: [email protected] > Subject: Re: [Emc-users] Changing the scale factor of an axis > > On 01/18/2012 12:41 PM, Lars Andersson wrote: > > This immediately gives a "joint 3 following error" even for a very > small > > change. > > > > Can I work around this? > > The problem appears to be, as someone pointed out, that changing the > scale factor also causes a step in the output due to a multiplying the > (possibly large) position by a different scale. > > One answer would be to create a real-time hal component, into which you > would feed the position and the desired scale factor. I'd have to think > about this to be sure but this is probably close: when the scale factor > changes, the component would (from then on) subtract from the output > the > value of > -current_output * (new_scale_factor - old_scale_factor) > so there is never a step in the output when changing scale. > > Karl > > ----------------------------------------------------------------------- > ------- > Keep Your Developer Skills Current with LearnDevNow! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, > MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-d2d > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
