GE 469-P1-HI-A20-T relay

The Contour Mode is ideal for generating an arbitrary velocity profile. The velocity profile can be specified as a mathematical function or as a collection of points. The design includes two parts: Generating an array with data points and running the program. Generating an Array - An Example Consider the velocity and position profiles shown in Fig. 6.6. The objective is to rotate a motor a distance of 6000 counts in 120 ms. The velocity profile is sinusoidal to reduce the jerk and the system vibration. If we describe the position displacement in terms of A counts in B milliseconds,

The DMC-18x2 can compute trigonometric functions.

 However, the argument must be expressed in degrees. Using our example, the equation for X is written as: X = 50T - 955 sin 3T A complete program to generate the contour movement in this example is given below. To generate an array, we compute the position value at intervals of 8 ms. This is stored at the array POS. Then, the difference between the positions is computed and is stored in the array DIF. Finally the motors are run in the contour mode.

Specifying Stepper Motor Operation

 In order to command stepper motor operation, the appropriate stepper mode jumpers must be installed. See chapter 2 for this installation. Stepper motor operation is specified by the command MT. The argument for MT is as follows: 2 specifies a stepper motor with active low step output pulses -2 specifies a stepper motor with active high step output pulses 2.5 specifies a stepper motor with active low step output pulses and reversed direction -2.5 specifies a stepper motor with active high step output pulse and reversed direction

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