Subject:
|
Re: "Servo" Driver for NQC
|
Newsgroups:
|
lugnet.robotics
|
Date:
|
Thu, 31 Jan 2002 15:24:02 GMT
|
Viewed:
|
720 times
|
| |
|
|
<snip>
> 4. Explanation that motor "BRAKE" command actually has 8 levels of braking
> depending on the last motor power level.
> Hope these tidbits are useful in implementing a "servo" driver.
<snip>
Really good post! Just a loose end: If you press the 'stop' button on the
RCX while a motor is running the motor stops in the 'brake' condition. If
you connect a spare motor to a gray battery box with the switch in a neutral
position, the motor is in the 'brake' condition. Also, if you take a spare
motor and short circuit the terminals (cross-connect with both ends of a
short wire) you get 'braking'. So, I always assumed that braking was just a
simple short-circuit. I must be wrong if there are 8 levels of braking.
Under what practical conditions is braking actually powered?
Jerry
|
|
Message is in Reply To:
 | | Re: "Servo" Driver for NQC
|
| 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 (...) (22 years ago, 31-Jan-02, to lugnet.robotics)
|
18 Messages in This Thread:
 
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
