## Search found 290 matches

Tue Jun 01, 2004 10:25 am
Forum: Robotics
Replies: 1
Views: 1572

### Re: .help for sience olympiad

If you have steering and speed, send speed to both motors. Add steering to one motor and minus steering to the other. Let motors be ML, MR, steering be D and speed be S. Here is a truth table: S D -D ML MR 0 0 0 0 0 stop 0 1 -1 1 -1 360 right 1 0 1 1 1 ahead 1 1 -1 -2 2 turn right<p>You can turn lef...
Wed May 19, 2004 2:12 pm
Forum: Robotics
Topic: PID
Replies: 6
Views: 3157

### Re: PID

Yes, thank you all. I got all I needed to know.
Mon May 10, 2004 2:30 pm
Forum: Robotics
Topic: PID
Replies: 6
Views: 3157

### PID

What does the P in PID do?
I have: Out = PE + I*i(E) + D*d(E) where E
is S1 - S2
i is integral function
d is derivative function
What is P?
Wed Mar 31, 2004 10:31 am
Forum: Robotics
Topic: dedicated motor controller protocols
Replies: 8
Views: 3016

### Re: dedicated motor controller protocols

Servo protocal is:
Cycle is 20 milliseconds.
At cycle end:
1 millisecond is full counterclockwise (-128)
1.5 millisecond is center (0)
2 milliseconds is full clockwise (127)
2. Produce pulse from number
3. produce 20 milliseconds space
4. go to 1.
This is how I do it.
Tue Mar 30, 2004 10:26 am
Forum: Robotics
Topic: dedicated motor controller protocols
Replies: 8
Views: 3016

### Re: dedicated motor controller protocols

I don't have a stepper motor controller, but I do have a servo motor controller.
It is SM node on my web page. It is bit serial in and servo out.
Be glad to send you the code if you don't need the hardware. Just ask.<p>
http://www.halbrain.com
Mon Mar 15, 2004 12:10 pm
Forum: Robotics
Topic: Big Darpa race was all did not finish
Replies: 1
Views: 1360

### Big Darpa race was all did not finish

The contestants of the 1 million dollar road race all failed to finish. Maybe that will finish conventional robotics.
Wed Feb 11, 2004 8:56 am
Forum: General Discussion
Topic: PIC-12F675 Chip
Replies: 3
Views: 618

### Re: PIC-12F675 Chip

Al,
The 12F629 is the companion chip.
The 12F675 has ADC. The 12F629 does not. They both use the same book.
Thu Feb 05, 2004 10:35 am
Forum: Robotics
Topic: General arithmetic with memory
Replies: 0
Views: 1169

### General arithmetic with memory

We have had Out = Out + In That can be extended. Out = Out + In1 f In2 ;where f is any arithmetic operator.<p>MP = MP + I1 + I2 MM = MP + I1 - I2 MO = MO + MAX(I1,I2) MA = MA + MIN(I1,I2)<p>Interesting to note that MP + MM = 0 and MO + MA = MP<p>General code, with Out, In and Ref is:<p>BEGIN Marith ...
Wed Feb 04, 2004 1:36 pm
Forum: Robotics
Topic: computer-moved levers and fake digital info (long)
Replies: 5
Views: 2663

### Re: computer-moved levers and fake digital info (long)

You are following a long history. In the 1700's it was all gears and levers. The music box is the remainder of the doll mechanism of that time. There are principles involved and the physics must be obeyed, but you can start anywhere. To move anything you need a motor controller, a motor and a gearbo...
Thu Jan 29, 2004 2:40 pm
Forum: Robotics
Topic: Out = Out + In
Replies: 5
Views: 2163

### Re: Out = Out + In

It turns out that the uncount is a differentiator with memory.
Out = In - OldIn ; is DNode internals
Out = Out - OldIn ; is Minus (uncount)
Since these are cheap TNodes, they will be on the node list.
Thu Jan 29, 2004 12:38 pm
Forum: Robotics
Topic: Out = Out + In
Replies: 5
Views: 2163

### Re: Out = Out + In

Thanks confused B. Turns out this is a counter. Count = Count + countbydifference There is also an uncount which is harder to do.<p>Connect count and uncount in series and you should get countbydifference back. This is getting very close to integration and differentiation which I alread have. So the...
Wed Jan 28, 2004 10:20 am
Forum: Robotics
Topic: Out = Out + In
Replies: 5
Views: 2163

### Re: Out = Out + In

Thanks for the comment. The code for this is a PIC 12F629. It has been simulated. I have not cut a chip yet. The input/ output of these nodes is 8 bit binary bit serial. The reason I cannot use an INode here (O = i(I)) is because of the speed. And I do not want to use the difference of the inputs, s...
Tue Jan 27, 2004 2:58 pm
Forum: Robotics
Topic: Out = Out + In
Replies: 5
Views: 2163

### Out = Out + In

I have found a need to update data outside as well as inside. I did that with X = X + k where X is modified inside the node and emitted outside. Myfood = Myfood + food hunger = Myfood GT hungerlimit Since data comes in as a solid stream I am using only data that is different from old data. Plus IM =...
Tue Jan 27, 2004 10:29 am
Forum: Robotics
Topic: coupling???
Replies: 1
Views: 1388

### Re: coupling???

I buy them already coupled. There are many ways to align a pair of shafts. In small machines a rubber tube of the right size will do. <p>Most small motors come with a small gear that you can press on the shaft. Then you build a structure to hold the other gears. That is why I let the factory do it.
Sat Jan 17, 2004 8:20 am
Forum: Robotics
Topic: More?? - How PWM Works?
Replies: 6
Views: 2770

### Re: More?? - How PWM Works?

Think of it this way. For a DC motor to run at full speed you feed it DC.
If you want it to run half speed, feed it half DC and half off. And so on.
The frequency comes from the repetition.
Motor