Subject:
|
Re: What is RPM of Gear Motor???
|
Newsgroups:
|
lugnet.robotics
|
Date:
|
Tue, 6 Jul 1999 23:22:55 GMT
|
Viewed:
|
963 times
|
| |
|
|
Keep checking the math. I clocked the motor at 330 - 350 rpm. I used the
rotation sensor driven directly by the motor. From analysis of the RCX
firmware, the rotation sensor should be accurate to 1250 rpm, so I'm
pretty confident of it being in the 350 range.
Dave
In article <37822CE2.230AD810@tufts.edu>, berwin@tufts.edu wrote:
> oops. forgot to divide by 2. make that between 600 and 720 RPM.
>
> I called pitsco lego dacta and they report 350 RPM... i wonder if i'm
> doing something else wrong in my analysis... but i can't find it! anyone
> else?
>
> Ben Erwin wrote:
>
> > I just made an optical shaft encoder with the light sensor and a
> > spinning paper disc, and measured somewhere near 1300 RPM using
> > datalogging on the RCX. Does anyone know if this is close to the
> > technical specs of the gear motor that I was using to drive it?
> >
> > thanks
> >
> > please send reply (no cc -- send two different messages if you want to
> > post answer to newsgroup as well) to address below:
> >
> > -Ben Erwin
> > berwin@tufts.edu
--
reply to: dbaum at enteract dot com
|
|
Message has 1 Reply:
 | | Re: What is RPM of Gear Motor???
|
| (...) Dave- Where are you getting that 1250 rpm upper limit from? While I haven't counted exactly yet, I'm dropping only 20 counts out of every thousand at ~15,000 rpm. I had assumed this was mainly gear slop, since it only appears to occur while (...) (25 years ago, 7-Jul-99, to lugnet.robotics)
|
Message is in Reply To:
| | Re: What is RPM of Gear Motor???
|
| oops. forgot to divide by 2. make that between 600 and 720 RPM. I called pitsco lego dacta and they report 350 RPM... i wonder if i'm doing something else wrong in my analysis... but i can't find it! anyone else? (...) (25 years ago, 6-Jul-99, to lugnet.robotics)
|
16 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
|
|
|
|
