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FM-3 Programming Module Reference Manual
Decimal Places
The number of decimal places set in this parameter determines the number of digits after the
decimal point used in all distance and position parameters used in synchronized motion
throughout the software. Using a high number of decimal places will improve position
resolution, but will also limit the maximum position. You can select from zero to six decimal
places of accuracy.
Scaling
The scaling factor is defined as MasterAxis.CharacteristicDistance / MasterAxis.Counts. The
numerator (top value of the scaling fraction) is the Characteristic Distance. The denominator
(bottom value of the scaling fraction) is the # of Counts. The Characteristic Distance is the
number of Master Distance Units that will be traveled per number of counts in the bottom of
the fraction. The Counts parameter is the number of incoming pulses it takes to travel the
characteristic distance.
Master Velocity Units
Decimal Places determines the number of decimal places to be used in the velocity parameter
for all synchronized motion.
Velocity Filter
The FM-3 uses a Low Pass Filter to smooth the observed velocity of the master encoder
signal. For synchronized motion, this filter helps to reduce noise in the command changes to
the drive which are based on the observed change of the master encoder. The user can set the
bandwidth (in Hz) of this filter based on the anticipated dynamics of the master encoder. For
a highly dynamic master, the bandwidth should be increased. For stable, slowly changing
masters, the bandwidth can be lowered.
Master Acceleration Units
The number of decimal places set in this parameter determines the number of digits after the
decimal point used in all real-time accel/decel parameters used for synchronized motion
throughout the software. Using a high number of decimal places will improve accel/decel
resolution, but will also limit the maximum accel/decel rate. You can select from zero to six
decimal places of accuracy.
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