quadrature encoder counter with 8 channels

[max_mustermann]

Hi,

I need to acquire the signals (A and B) of four quadrature encoders. The signals have a maximum frequency of about 5kHz and should be read out with about 100 Hz. Is there a device that fulfils these requirements? It seems that a frequency of 5kHz is no problem since e.g. the USB-6008 has a counter for frequencies up to 1 MHz. However, I can't find a simple low-cost device that provides several counters. Does anyone know such a device with 4 or 8 counters?

No other analog or digital channels are necessary, but a USB connection and Matlab support would be ideal.

Thanks in advance.

[John_P1]

Depending on your definition of low-cost, the 9171+9401 might suit your needs:

• 4 counters capable of quadrature encoder measurements (the single counter on the 6008 only does simple edge counting).
• USB connection.
• MATLAB support via the Data Acquisition Toolbox (according to their website).

I don't believe NI currently has any other option that meets these requirements at a lower cost.  If USB isn't mandatory, you could also consider the PCIe-6612 which provides 8 counters.

Best Regards,

[max_mustermann]

Hi John,

thanks for your help. I didn't notice that combination, it should be working.