Systems, methods and devices for generating pulses
At least one exemplary embodiment of the present invention includes a method comprising obtaining a first frequency and a second frequency. The method also comprises creating a table of values comprising a plurality of target frequencies intermediate to the first and second pulse width corresponding to each of the target frequencies from the plurality of target frequencies. The method further comprises outputting at least a portion of the values to a motion device.
1. A method, comprising:
obtaining a first position, a second position, and a maximum motion parameter for a movement between the first position and the second position;
calculating, using a processor, based in part on the maximum motion parameter, a pulse width, a pulse count, and a differential pulse width corresponding to each of a plurality of target frequencies for the movement;
creating a table of values comprising the plurality of target frequencies and the pulse width, the pulse count, and the differential pulse width corresponding to each of the target frequencies;
selecting at least one of the plurality of target frequencies; and
outputting at least a portion of the values corresponding to the at least one of the plurality of target frequencies from a pulse generator.
2. The method of claim 1 , further comprising constraining at least a subset of the values by the maximum motion parameter.
3. The method of claim 1 , further comprising determining each target frequency from the plurality of target frequencies.
4. The method of claim 1 , wherein the plurality of target frequencies are semilogarithmically distributed.
5. The method of claim 1 , further comprising transmitting the values to a motion device.
6. The method of claim 1 , further comprising transmitting the values via the Internet.
7. The method of claim 1 , wherein the pulse generator is integral to a programmable logic controller.
8. The method of claim 1 , wherein the maximum motion parameter is a speed.
9. The method of claim 1 , wherein the maximum motion parameter is an acceleration.
10. The method of claim 1 , wherein the maximum motion parameter is a time rate of change of acceleration.
11. The method of claim 1 , wherein the maximum motion parameter is a time rate of change of jerk.
12. The method of claim 1 , wherein the pulse generator outputs at least the portion of the values to a motion device.
13. The method of claim 1 , wherein the differential pulse widths are included in a pre-computed table and are distributed according to a constrained semi-logarithmic distribution.
14. The method of claim 1 , wherein the differential pulse widths are changed by means of an additive interpolation between pre-computed points.
15. The method of claim 1 , wherein the differential pulse widths are changed by adding one of a positive and a negative number of clock events to a current value, the one of the positive and the negative numbers being a combination of an integral number and a fractional number.
16. A computer-readable medium containing computer executable instructions to perform a method, the method comprising:
obtaining a first position, a second position, and a maximum motion parameter for a movement between the first position and the second position;
calculating, using a processor, based in part on the maximum motion parameter, a pulse width, a pulse count, and a differential pulse width corresponding to each of a plurality of target frequencies for the movement;
creating a table of values comprising the plurality of target frequencies and the pulse width, the pulse count, and the differential pulse width corresponding to each of the target frequencies;
selecting at least one of the plurality of target frequencies; and
outputting at least a portion of the values corresponding to the at least one of the plurality of target frequencies from a pulse generator.
17. A method, comprising:
outputting values from a pulse generator, the values adapted to cause a movement between a first position and a second position, the values obtained from a table of values comprising a plurality of target frequencies for the movement, the table of values also comprising a pulse width, a pulse count, and a differential pulse width corresponding to each of the target frequencies, the table of values created based upon the first position, the second position, and a maximum motion parameter for the movement between the first position and the second position, wherein the pulse width, the pulse count, and the differential pulse width corresponding to each of a plurality of target frequencies are calculated, using a processor, based in part on the first position, the second position, and the maximum motion parameter, and wherein the values are obtained from the table for outputting by selecting at least one of the plurality of target frequencies.