Search found 8 matches
- Tue Jul 03, 2007 3:55 pm
- Forum: Robotics
- Topic: Wanting to jump into robotics
- Replies: 1
- Views: 3566
What's first
I think it all depends on what you want to do. If you want to test a bit and play with different concepts for sensory/movement/reaction and autonomous or near autonomous a Mindstorms kit is fine. If you want to use a computer or complex programming languages to drive tasks and/or do things with heav...
- Tue Nov 07, 2006 5:09 pm
- Forum: Robotics
- Topic: Go Carts and Servos
- Replies: 27
- Views: 24202
RC & Driver control
Have the driver operated steering wheel and shaft attached solidly to the other steering components. Use a slipping connection between the motor and the shaft or a slipping connection between the drivers steering system and the motor. When I say 'slipping connection' I mean a connection that connect...
- Sun May 22, 2005 1:35 pm
- Forum: General Discussion
- Topic: resistance soldering
- Replies: 7
- Views: 3527
Re: resistance soldering
Sounds like the Spot Welders there have the best ideas, but if you do want to avoid the contact issue in other projects, American Beauty resistance soldering equipment uses carbon pliers on all of their larger units. Not sure if its the answer but it might be worth trying. FYI, Their smallest units ...
- Fri May 20, 2005 4:25 pm
- Forum: Robotics
- Topic: Servo controller "two switches"
- Replies: 3
- Views: 5133
Re: Servo controller "two switches"
Or you could go with a modification of one of the following - no programming at all in some cases, just use a 555 and a couple of transistors: <p> http://www.uoguelph.ca/~antoon/gadgets/servo2.htm <p> http://www.uoguelph.ca/~antoon/gadgets/servo3.htm <p> http://www.uoguelph.ca/~antoon/gadgets/servo4...
- Fri May 20, 2005 4:19 pm
- Forum: General Discussion
- Topic: Servo motor drive voltage
- Replies: 10
- Views: 5513
Re: Servo motor drive voltage
I checked the oscilloscope and its actually not a 50% pwm - its a hard 3v. When the motor kicks in it sends PWM pulses up (more positive) on one side and down (toward ground) on the other. It does this when the motor is in the circuit or removed. <p>What does 'hover' mean in this context? I took it ...
- Thu May 19, 2005 6:37 pm
- Forum: General Discussion
- Topic: Servo motor drive voltage
- Replies: 10
- Views: 5513
Re: Servo motor drive voltage
Ah - ok, The circuit I'm working on is not necessarily an H-bridge, but it probably contains similar either circuitry or programming. Its the chip inside a Hitec servo. The chip directly drives the motor movement. Unlike an H-bridge, the voltage applied to the motor's positive and negative poles is ...
- Thu May 19, 2005 3:03 pm
- Forum: General Discussion
- Topic: Servo motor drive voltage
- Replies: 10
- Views: 5513
Re: Servo motor drive voltage
Thanks Gorgon!<p>Just to make sure I understand. In all places not stated voltage measurements are relative to common (non-motor) ground:<p>Condition 1) Input 1 to motor is +3, Input 2 to the motor is +3 <p>Command to move one direction comes in: Average positive charge rises on side one, the driver...
- Thu May 19, 2005 10:32 am
- Forum: General Discussion
- Topic: Servo motor drive voltage
- Replies: 10
- Views: 5513
Servo motor drive voltage
The chip driving the motor inside a Hitec 422 and 300 series servo never sends zero voltage (short to ground) to the motor. At a full stop it provides (given a five volt source) +3 (relative to the input ground) to one side of the motor and +3 to the other side of the motor. Since there is no differ...