Subject:
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Re: Analog port shaft encoder
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 25 Oct 1999 16:24:48 GMT
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Original-From:
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Gary Livick <glivick@pacbell.net/avoidspam/>
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Viewed:
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3308 times
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Rob,
I use these same encoders just as you do, and they work fine. However, the
spacing of the encoders from thier targets is important for proper function.
1.5 to 2 mm works well for me.
In addition, I have had to play with the encoder high threshold to make things
work. I set mine at 125, and never miss a count.
Good Luck,
Gary Livick
TH0RMAN23@aol.com wrote:
> Tried what you said Joshua, I went through all the analog ports and manually
> fed them with a TTL signal from a function generator at a relatively low
> frequency of 5Hz and wrote this little test code to test it. In this example,
> the sencdr3.icb has been loaded with a global variable named encoder3_counts.
> This variable kept the running count of the encoder's ticks so I really dont
> have to do anything else but to read it.
>
> void encoder_test()
> {
> while(1)
> {
> printf("Count: %d\n", encoder3_counts);
> }
> }
>
> void main()
> {
> start_process(encoder_test());
> }
>
> The optical encoder is connected to analog port 3 with a 330 ohms current
> limiting resistor for the Emmiter and the sensor si pull up by the Handy
> Board's internal 47K. An oscilloscope is connected to the sensor side of the
> encoder (QRB1114) . I ran the code and got the pulse but I have no result on
> the LCD beside a 1 which seems to "stuck" there and wont change. Does anybody
> else have this problem with using this driver? Thanks.
>
> Best regard,
> Rob
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Message is in Reply To:
 | | Re: Analog port shaft encoder
|
| Tried what you said Joshua, I went through all the analog ports and manually fed them with a TTL signal from a function generator at a relatively low frequency of 5Hz and wrote this little test code to test it. In this example, the sencdr3.icb has (...) (27 years ago, 23-Oct-99, to lugnet.robotics.handyboard)
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