Thread: Direct control of a Servo or Speed Controller
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Unread 06-03-2006, 13:53
Russ Beavis Russ Beavis is offline
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Re: Direct control of a Servo or Speed Controller
LabVIEW running under Windows definitely cannot be relied upon to produce the timing necessary to create 17ms period PWM signals with on-time variable between 1 and 2ms. BUT... If you're using a data acquisition module with a "full" timer/counter module (ie not the simple event counter that exists in the USB-6008/9 but a full-blown counter as in most PCI-based cards from NI), it's very easy to generate PWM signals with hardware-based timing and microsecond precision and accuracy. Because most USB-based DAQ modules are lower-cost systems, they tend to have limited counter capabilities.

There are also LabVIEW Real-Time variants that can produce the necessary timing but that's a big step up in cost and complexity.

Russ
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