Command Summary - Electronic Gearing - Galil Motion Control CDS-3310 User Manual

Command Summary - Electronic Gearing

COMMAND
GA n
GD a
_GPn
GR a
Examples
Electronic Gearing
Objective: Run a geared motors at a speed of 1.132 times the speed of an external master. The master
is driven at speeds between 0 and 1800 RPM (2000 counts/rev encoder).
Solution:
Now suppose the gear ratio of the A-axis is to change on-the-fly to 2. This can be achieved by
commanding:
Phase Corrections
You may also perform profiled position corrections in the electronic gearing mode. Suppose, for
example, that you need to advance the slave 10 counts. Simply command
Under these conditions, this IP command is equivalent to:
Often the correction is quite large. Such requirements are common when synchronizing cutting knives
or conveyor belts.
Synchronize two conveyor belts with trapezoidal velocity correction.
i
52 Chapter 6 Programming Motion
DESCRIPTION
Specifies master axes for gearing where n = DX for auxiliary encoder
Sets the distance the master will travel for the gearing change to take full effect.
This operand keeps track of the difference between the theoretical distance traveled if
gearing changes took effect immediately, and the distance traveled since gearing
changes take effect over a specified interval.
Sets gear ratio. 0 disables electronic gearing for specified axis.
Instruction
GA DA
GR 1.132
GR 2
IP 10
PR10
BGA
Instruction
GA DA
GR2
PR300
SP5000
AC100000
DC100000
BG
Interpretation
Specify aux encoder as the master
Specify gear ratios
Specify gear ratio for A axis to be 2
Specify an incremental position movement of 10
Specify position relative movement of 10
Begin motion
Interpretation
Define aux encoder as the master axis for B.
Set gear ratio 2:1
Specify correction distance
Specify correction speed
Specify correction acceleration
Specify correction deceleration
Start correction
CDS-3310