Technical information

230V FX Series Positioning Drive Reference Manual

for this parameter leave enough room for the motor to stop without damaging machinery

or injuring personnel.

For example:

A motor with 0.5 In/Rev lead screw and the motor’s maximum speed is 3000 RPM. If the

motor is operating at 1500 RPM (750 In/Rev), and the Travel Limit Decel Time = 1 second,

the actual stopping time would be:

((1500 RPM)/(3000 RPM))(1 sec)=.5 sec

The distance traveled during the .5 sec deceleration period would be:

Distance Traveled=(750 IPM)(.5 sec)/(2(60sec/min))=3.125 in

Therefore, your limit switch (or software travel limit value) should be more than 3.125 inches

from the actual end of travel to avoid machine damage.

The value you enter here is the time the FX drive will take to go from maximum motor speed

to zero. If the motor is traveling at less than maximum speed, the time to stop is

correspondingly shorter:

DT1=(DT2)(AMS/MMS)

Where:

DT1 = Actual deceleration time

DT2 = Value you entered in PCX

AMS = Actual Motor Speed

MMS = Maximum Motor Speed

The factory default for Travel Limits & Fault Decel Time, as well as Stop/Hold Decel

Time, is 0.040 seconds. Theoretically, this is the time needed to stop a motor running at

3000 RPM within a distance of one motor revolution. If your motor is connected to a

speed reducer, this short decel time may be too abrupt to bring the motor/reducer/load

combination safely to a halt. You may wish to use longer decel times for each of these

conditions, depending on the load size and the machine’s operation.

Stop/Hold Decel Time

This parameter sets the deceleration time used when a Stop, Suspend or Hold command is

initiated. see “Travel Limits and Fault Decel Time” on page 87 for more information.

Absolute Rotary Position Limits

This value is used in rotary indexing applications and determines the position at which the

internal position counter will be reset to zero. In a 360.00 degree application, the proper entry

would be 360.00 degrees. If the axis is moving in a positive direction, the next position after