On Oct 15, 2011, at 8:46 PM, Peter C. Wallace wrote: > > I would check carefully that you do not have something, likely a velocity or > steplen/stepspace setting that limits the maximum stepgen speed. > > at your scale and speed you have a fairly slow step rate (82 KHz) which is > less than 1% of the step generators maximum speed (12.5 MHz) so the ghardware > is not the limiting factor, some setup option must be set incorrectly
Here is the ini file settings that we have currently. Peter (who is working with me) is going to try setting steplen and stepspace up a little higher to see if that helps. He thinks he already tried that but will do it again to be sure... #******************** # Axis Y (Y1) #******************** [AXIS_1] NAME = Y1 TYPE = LINEAR HOME = 0.0 HOME_SEQUENCE = 0 FERROR = 0.5 MIN_FERROR = 0.5 MAX_VELOCITY = 39 MAX_ACCELERATION = 120 #STEPGEN_MAXACCEL = 220 #MAX_ACCELERATION = 10 #STEPGEN_MAXACCEL = 30 #Encoder/PID P=0.0 I=0.0 D=0.0 FF0=0.0 FF1=1.0 FF2=0.0 BIAS=0.0 DEADBAND=0.0 MAX_OUTPUT=0 # these are in nanoseconds DIRSETUP = 200 DIRHOLD = 200 STEPLEN = 200 STEPSPACE = 200 #500 encoder ppr (2000 quad) #SCALE = -1273.239544735163 #INPUT_SCALE = -1273.239544735163 #1000 encoder ppr (4000 quad) #SCALE = 2546.479089470325 #INPUT_SCALE = 2546.479089470325 #10x after setting Granite to 10:1 ratio SCALE = 25464.79089470325 INPUT_SCALE = 25464.79089470325 MIN_LIMIT = -0.01 MAX_LIMIT = 53.0 HOME_OFFSET = 0.0 ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2d-oct _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
