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QUadrature Pulses Motor

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#1 Checho

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Posted 01 August 2013 - 01:58 PM

Hi, I have 2 quadrature encoders and need to Give (pulse/Dir) to 2 servos ( Flexible drivers)


I was thinking in a U6.... using Labview...


since all 4 timers are gonna be occupied by encoders.... do I need extra hardware for the (Pulse/Dir) ???



anyone with a similar application????

#2 LabJack Support

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Posted 01 August 2013 - 02:20 PM

You would be using all 4 timers for your 2 quadrature inputs.  That means you would do software commands to create the step pulses.  I think you would always use a software command to set the direction output high/low.


It takes roughly 1 ms to execute a command through software, and you could do a handful of pulses in 1 command, so that gives you and idea of the speed you could get making the steps in software.


Timers/counters are part of the DIO EF system on the new T7, and it looks like you can do quadrature on FIO2/3 & FIO6/7, leaving FIO0/4/5 available for PWM or pulse output.  So the T7 might be something to consider.

Also tagged with one or more of these keywords: QUadrature Pulses, Motor

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