Laser LS8000-3 manual Quadrature Output Phase Relationships

LaserSpeed 8000-3 Instruction Handbook

Interfacing with the LS8000-3

Because the opto-isolator in the circuit has a relatively slow response time compared with the LaserSpeed's maximum pulse output frequency, when using this circuit, keep the LaserSpeed's pulse output frequency below 20kHz.

Quadrature Output Phase Relationships

The phase relationship of the quadrature outputs is determined by the direction of the measured velocity. If the velocity is a positive number, Phase A rising edge will lead Phase B rising edge, and if the velocity is negative Phase B will lead Phase A rising edge. For more information on the direction input, see Operational Inputs.

Typical Full Quadrature Pulse Train with Positive Velocity

Part No. 93463 / Drawing No. 0921-01561 Page 39 of 221 Revision A (Sep 2007)