Quote:
Originally Posted by Ether
What do you mean by "pips" in this context?
What example are you referring to?
What is the complete model number of the S4 you are using?
How fast are you spinning the encoder (RPM) ?
Are you using the FPGA to compute rate? If so, what sample size are you using? And what mode 1X, 2X, or 4X? Or are you reading delta counts and dividing by elapsed time? If so, are you just dividing by 100ms? Or are you reading the system clock to get elapsed time? For the 100ms task, are you using a timed loop or a wait loop?
It would help if you would post a picture of the relevant portion of your code showing all the parameter values you are using to decode the encoder signal.
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The Encoder Get VI he showed in 100ms loop screenshot is spitting out the rate that the FPGA calculates (via the orange wire) in distance/s based on the average encoder period for the last N samples (see setSamplesToAverage) and the Distance/Tick number fed in in Begin.vi. The Begin.vi shows he is decoding in 4x mode. The 100ms loop is merely polling the FPGA for an updated rate number every 100ms. LabVIEW is really not the easiest to read
I would like to see a plot vs. time of the rate you get from your 100ms loop. Also, can you give any details about the gearbox (input motors, input voltage, reduction between motors and idler sprocket/encoder, and any load applied). A complete S4 encoder part number will also help us know what speeds it is rated for, the CPR, etc. Something like S4-X-250-X-S-B.