ThomasV
22.04.2021 16:02:04
I'm may be buying a boat and both engines are identical. I've read that there is a benefit to counter rotation on twin engines to cancel out torque. <br /><br />Lakensea, how do the gear boxes differer?
See full version: Counter Rotating a motor
I'm may be buying a boat and both engines are identical. I've read that there is a benefit to counter rotation on twin engines to cancel out torque. <br /><br />Lakensea, how do the gear boxes differer?
Seahorse speaks with straight tongue. If you look at a set of regular gears and a set of counter-rotating gears side by side, there's a big difference.<br /><br />c/6<br />Hooty [links]
Re: Counter Rotating a motor. [links]
Completing the CAPTCHA proves you are a human and gives you temporary access to the web property.
Another way to prevent getting this page in the future is to use Privacy Pass. You may need to download version 2.0 now from the Chrome Web Store. [links]
If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. [links]
When the shaft of the motor is at the desired position, power supplied to the motor is stopped. If not, the motor is turned in the appropriate direction. The desired position is sent via electrical pulses through the signal wire. The motor's speed is proportional to the difference between its actual position and desired position. So if the motor is near the desired position, it will turn slowly, otherwise it will turn fast. This is called proportional control. This means the motor will only run as hard as necessary to accomplish the task at hand, a very efficient little guy.
more
The guts of a servo motor (L) and an assembled servo (R)
Servos are controlled by sending an electrical pulse of variable width, or pulse width modulation (PWM), through the control wire. There is a minimum pulse, a maximum pulse, and a repetition rate. A servo motor can usually only turn 90° in either direction for a total of 180° movement. The motor's neutral position is defined as the position where the servo has the same amount of potential rotation in the both the clockwise or counter-clockwise direction. The PWM sent to the motor determines position of the shaft, and based on the duration of the pulse sent via the control wire; the rotor will turn to the desired position. The servo motor expects to see a pulse every 20 milliseconds (ms) and the length of the pulse will determine how far the motor turns. For example, a 1.5ms pulse will make the motor turn to the 90° position. Shorter than 1.5ms moves it in the counter clockwise direction toward the 0° position, and any longer than 1.5ms will turn the servo in a clockwise direction toward the 180° position. more
Of course, you don't have to know how a servo works to use one, but as with most electronics, the more you understand, the more doors open for expanded projects and projects' capabilities. Whether you're a hobbyist building robots, an engineer designing industrial systems, or just constantly curious, where will servo motors take you?
Servo motors have been around for a long time and are utilized in many applications. They are small in size but pack a big punch and are very energy-efficient. These features allow them to be used to operate remote-controlled or radio-controlled toy cars, robots and airplanes. Servo motors are also used in industrial applications, robotics, in-line manufacturing, pharmaceutics and food services. But how do the little guys work?
A tiller's rotating tines dig into the ground, breaking up soil. Reverse- or counter-rotation tines turn the opposite direction of the tiller’s drive wheels, and forward-rotation tines turn in the same direction as the drive wheels. The direction in which the tines rotate affects how well they dig into soil. more
The digging action of forward-rotation tines is not typically as aggressive as that of reverse-rotation tines. Tines that rotate in reverse easily break up compacted and rocky soils as well as sod and hard clay. Tillers with tines that rotate forward create well-aerated soil in areas where a garden has existed before and in uncultivated soils that are loose. Because of their more aggressive digging action, however, reverse-rotation tines tend to leave a deeper, cleaner seedbed in fewer passes than forward-rotation tines. more
When a tiller with forward-rotating tines grabs onto a rock, root or stump, the tiller jumps forward and away from the person operating it, and so the risk of injury to the operator is low. If the tines of a reverse-rotating tiller grab anything, the tiller jumps backward, toward the person using the machine. That situation can be dangerous because the operator may not be able to move out of the way of the tines if he is in a tight area. In order to avoid injury in those situations, reverse rotation should be used only on tractor-mounted tillers.
Rotary tillers prepare soil for planting, saving you time and labor. The machines are available in front-tine models and rear-tine models. Front-tine tillers use forward rotation to cultivate soil while rear-tine tillers use both forward and reverse rotation. Both forward and reverse rotation of the tines tills soil effectively, but each method has disadvantages as well.