Galil DMC-1700 Manual Do Utilizador

 

The slave axis for each figure is shown on the bottom portion of the figure; the master axis is shown on the top 
portion.  The shock to the slave axis will be significantly less in figure 2 than in figure1.  The ramped gearing does 
have one consequence.  There isn’t a true synchronization of the two axes, until the gearing ramp is complete.  The 
slave will lag behind the true ratio during the ramp period.  If exact position synchronization is required from the 
point gearing is initiated, then the position must be commanded in addition to the gearing.  The controller keeps 
track of this position phase lag with the _GP operand.  The following example will demonstrate how the command 
is used. 

Objective Run two geared motors at speeds of 1.132 and -.045 times the speed of an external master.  Because the 
master is traveling at high speeds, it is desirable for the speeds to change slowly.   

Solution: Use a DMC-1730 or DMC-1830 controller where the Z-axis is the master and X and Y are the geared 
axes.  We will implement the gearing change over 6000 counts (3 revolutions) of the master axis. 

 

 

 

 

MO Z 

 Turn Z off, for external master 

GA Z, Z 

 Specify Z as the master axis for both X and Y. 

GD6000,6000 

Specify ramped gearing over 6000 counts of the master axis. 

GR 1.132,-.045 

 Specify gear ratios 

 

Question:  What is the effect of the ramped gearing? 

 

Answer:  Below, in the example titled Electronic Gearing, gearing would take effect immediately.  From the start of 
gearing if the master traveled 6000 counts, the slaves would travel 6792 counts and 270 counts. 

 

Using the ramped gearing, the slave will engage gearing gradually.  Since the gearing is engaged over the interval of 
6000 counts of the master, the slave will only travel ~3396 counts and ~135 counts respectively.  The difference