Subject:
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Re: "Servo" Driver for NQC
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 30 Jan 2002 14:41:02 GMT
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Viewed:
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923 times
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In lugnet.robotics, sjbaker1@airmail.net writes:
> Matthias Jetleb wrote:
<snip>
>
> But it doesn't need to. The 'power' settings built into the RCX firmware
> are already using pulse-width modulation to adjust the amount of power
> the motor delivers.
>
> ----------------------------- Steve Baker -------------------------------
Right, but in the firmware PWM, it is 'on-float-on-float' not
'on-brake-on-brake' I think (but I'm not sure).
In fact, the 'on-brake-on-brake' is a neat way to get fine control to (say)
just crack a pneumatic valve to move a piston without much force. But it is
very jittery and I wonder if I am destroying the motor gearing.
Jerry
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Message has 1 Reply:
 | | Re: "Servo" Driver for NQC
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| This is a long post. It covers the following: 1. How the "WAIT x 10 msec" opcode is implemented and its inherent inaccuracy for low delays. And suggests an alternative code implementation 2. How RCX motor PWM is implemented. And the implication that (...) (23 years ago, 31-Jan-02, to lugnet.robotics)
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Message is in Reply To:
| | Re: "Servo" Driver for NQC
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| (...) But it doesn't need to. The 'power' settings built into the RCX firmware are already using pulse-width modulation to adjust the amount of power the motor delivers. ---...--- Steve Baker ---...--- Mail : <sjbaker1@airmail.net> WorkMail: (...) (23 years ago, 29-Jan-02, to lugnet.robotics)
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