Subject:
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Expansion Board Servo timing...
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 12 Apr 1999 20:31:18 GMT
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Original-From:
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wengd@optionshealthcare.com%saynotospam%
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Viewed:
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950 times
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How sensitive are the exp bd servo routines to many processes running
concurrently. My servo works fine in a stand alone test file but when I
include it in my main code it gets the "nervous shakes", as if the timing
pulse is fluctuating ( I don't have a scope to verify this). The main code
starts separate processes for Sharp GP2D02, Photo, Bump, Pyro, User
(scans start button) and a Sonar which I disabled. Some of these
sensors are located on a servo controlled head. What's up?? Am I just
trying to do too much? Can the processes be assigned more or less
"ticks" to resolve this? Thanks for any suggestions.....
-Drew
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Message has 2 Replies:
 | | Re: Expansion Board Servo timing...
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| Drew- I have a Handy Board on a robot that runs three servos and the GP2D02 sensor, and I have the same nervous jitters problem. However, I do not run any processes on this application. I am using IC under v 3.2 of the software, so I could use (...) (25 years ago, 12-Apr-99, to lugnet.robotics.handyboard)
| | | Re: Expansion Board Servo timing...
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| (...) I don't know about the servo routines on the HB, but servos *do* start to jitter when the pulses get much below about 20Hz. This is not due to the pulse width 'fluctuating', it's because the refresh rate is dropping. It certainly is possible (...) (25 years ago, 12-Apr-99, to lugnet.robotics.handyboard)
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