PCM-22 Rotary Knife Controller
40
© EMERSON Motion Control
Master Phase Distance
The
Master Phase Distance
is the distance that determines how far the
Master zero position lags behind the Master
Cycle Point
. If the
Master
Phase Distance
is longer than the
Average Master Length
, the
Average
Master Length
distance will be subtracted from the
Master Phase
Distance
until the remaining distance is between zero and the
Average
Master Length.
This remaining distance is used as the phase
relationship between the Master and Follower axes. The minimum
Master Phase Distance
is zero. See
Terminology
and
FM12
serial
command.
Master Phase Distance Adjustment
If the desired
Cycle Point
is at a position other than the registration
mark, the
Master Phase Distance
parameter is used to move the
Cycle
Point
. Increase the
Master Sensor Distance
to move the
Cycle Point
before the start of the product; decrease the
Master Sensor Distance
to
move the
Cycle Point
after the product registration mark.
The
Master Phase Distance
may be adjusted serially or by using
Sensor
Dist. Increment
and
Sensor Dist. Decrement (
input functions 72 and 73
respectively) while in cycle.
Master Cycle Defined By Sensor
This parameter determines if the product position is defined by a sensor
input “Yes”, or if not defined by a sensor “No”.
Master Cycle Defined By Sensor - “No”
If “No” is entered, the
Master Cycle Length
entered using PCX will be
executed. The
Zero Master Cycle
input must be activated once to define
the Master zero position. Once the Master zero position has been set the
master axis length is determined by encoder counts only.
Master Cycle Defined By Sensor - “Yes”
If “Yes” is entered, the Master cycle will be defined by a sensor on the
Zero Master Cycle
input line. The sensor will then be used to determine
the beginning of each Master cycle. The synchronization source will
provide positional information of the
Master Cycle Length
along with the
sensor input to compensate for length and phase variations. See
Average
Length
and
Maximizing Profile Performance.
Note:
Typically if the Master cycle is defined by sensor then the
Follower should also be defined by sensor for the greatest
accuracy.
Cycle Length Averaging
This parameter determines how much the new measured length affects
the current operational Master Length. The lower the average, the faster
length errors are corrected for. The higher the
Cycle Length Averaging
value, the more it will filter out sensor and machine anomalies.
