don wilson wrote: > Hello all, new to group. > > I am in the very final phases of completing my cnc setup. > > The last thing I did was set a backlash setting in my ini file. After doing > this and running a test, I noticed that the x-axis motor started freezing up > and loosing steps. Everything was working perfectly before I used a backlash > number. > > I was wondering if anyone else has encountered this here. I am thinking that > the backlash repositioning does not adhere to whatever acceleration values > you have set on your system and therefore locks up. > > Is there a way to change the acceleration value of the backlash? Will > lowering the acceleration of the system help this? > > Any input is appreciated! >
This is a known problem, one that unfortunately doesn't have a simple fix that we could apply to the code. The backlash compensation move is limited to 50% of the accel limit in the ini file. The compensation move is added to whatever movement is required to machine the part. If the part program is using 100% of the accel limit, then the sum of the two can total 150%. The only workaround is to reduce the ini file acceleration limit to 66% of what you have determined that your motors can handle. That way, you have a maximum of 66% main program accel + 33% backlash accel = 99% which your motors can handle. Regards, John Kasunich ------------------------------------------------------------------------------ Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
