| |
In lugnet.org.ca.rtltoronto, Calum Tsang wrote:
> In lugnet.org.ca.rtltoronto, Rob Antonishen wrote:
> > Well, it looks like in the 11th hour I'm going to have to abandon my
> > differential drive for Project Y....there is WAY too much play in the
> > differential gear train, which makes tracking the light with the whole
> > bot virtually impossible...
>
> Can I ask a stupid question from a non-moving bot owner? Why do you need that
> much precision? The light readings are going to be pretty variable, and the
> robot targets and obstacles are all moving, so do you really need that much
> precision to know the general direction you need to be going in?
>
> Calum
Are you thinking the robot could adjust its direction on the fly? In my limited
experience, precision matters when the robot is close to the TO, especially if
it can cover a lot of ground in the time it takes for the sensors to come back
with a reading (or to average a series of readings in my case).
Since I'm taking the time to delurk, I'd like to give a shout out to David K. I
abandoned my previous 'bot platform (AB with castors), in favour of Dave's AB
skid steer with 4 driven wheels and 4 motors after reading his posts. The
castors were throwing off my aim and it was making me wonder if my software was
faulty. There's only one light sensor and the algorithm was stop, scan, drive.
If the 'bot doesn't drive towards the light with the new platform, I know it's
the software, instead of trying to factor out the castors.
|
|
Message has 2 Replies:
 | | Re: Gear lash....
|
| In lugnet.org.ca.rtltoronto, Wayne Young wrote: <snip> (...) Yeah, castors are harsh. I tried a nice little 2 wheeled beast with castors, thinking that I'd save room in the 'bot, but the castors threw the 'bot off so much, especially right after a (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
| | | Re: Gear lash....
|
| (...) But if you are "close" to the TO...then your precision usually is higher anyways--less movement, less slop? Here's some made up numbers to illustrate what I don't understand... If I read at time 0 at 30 degrees, a "contact". By the time I come (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
|
Message is in Reply To:
| | Re: Gear lash....
|
| (...) Can I ask a stupid question from a non-moving bot owner? Why do you need that much precision? The light readings are going to be pretty variable, and the robot targets and obstacles are all moving, so do you really need that much precision to (...) (19 years ago, 2-Mar-06, to lugnet.org.ca.rtltoronto)
|
33 Messages in This Thread:
 
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
This Message and its Replies on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
