Subject:
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RE: nxt controller specification
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Newsgroups:
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lugnet.robotics.nxt
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Date:
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Wed, 13 Feb 2008 17:35:32 GMT
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Viewed:
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32723 times
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Thank you for clarifying this, Brian.
I was reading http://www.philohome.com/motors/motorcomp.htm. It stated that
the NXT with "Stalled torque) up to 50 N.cm. 50N... it equates approximately
10lbs?! That is without any further gearing down, but just the NXT motors!?
Wonder if anyone has further insight to this?
-----Original Message-----
From: news-gateway@lugnet.com [mailto:news-gateway@lugnet.com] On Behalf Of
Brian Davis
Sent: Tuesday, February 12, 2008 10:14 PM
To: lugnet.robotics.nxt@lugnet.com
Subject: Re: nxt controller specification
In lugnet.robotics.nxt, Elizabeth Mabrey wrote:
> 32-bit ARM7 microcontroller
> 256 Kbytes FLASH, 64 Kbytes RAM
> 8-bit AVR microcontroller
> 4 Kbytes FLASH, 512 Byte RAM
>
> There are 2 controllers onboard?
Yes. The AVR is responsible for a number of things, including PWM and
encoder
reading on the motor ports (IMS), the reading of the front panel button
state,
power management, and A/D from the input lines for analog sensors. It is not
reprogrammable from the USB port. Think of it as a "helper processor".
As to the memory, what you see in the file system is the flash memory -
specifically, what's left over after the firmware is sitting on there. The
RAM
is used for running programs, not storing data, sound or otherwise. If you
clean
all the extra stuff off the brick (check "show system files" and then
"delete
all"... I think that gets rid of most of it), you can have about 120k
available
to the user.
--
Brian Davis
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Message has 1 Reply:
 | | Re: nxt controller specification
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| (...) Yep. But note that Philo was talking about *torque*, not force. A torque of 50 N•cm means that it could supply a force of 50 N with a lever arm of 1 cm, or a force of 500 N (more than 100 lbs) for a lever arm of 1 mm... but that would imply an (...) (16 years ago, 13-Feb-08, to lugnet.robotics.nxt)
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Message is in Reply To:
| | Re: nxt controller specification
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| (...) Yes. The AVR is responsible for a number of things, including PWM and encoder reading on the motor ports (IMS), the reading of the front panel button state, power management, and A/D from the input lines for analog sensors. It is not (...) (16 years ago, 13-Feb-08, to lugnet.robotics.nxt)
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