Pages:  2. Topic: degree addressable servo rotation possible? Read times previous topic - next topic. This might be an easy question for some Basically I need an actuator that will allow me to go to any degree at any time. Is this possible? For example something like this Code: [Select]. Re: degree addressable servo rotation possible?
Probably depends on what you want to do. Winch servos can rotate more than deg. A standard deg servo can have gearing added to turn something more than deg. Google forum search: Use Google Search box in upper right side of this page.
Maybe this is a better analogy. Imagine an old school rotary telephone dial and your finger placed just at the top of the dial. I want to be able to move any number to your finger randomly based on some external data.
Does that help? After some more research I'm thinking a sparkfun EasyDriver board and one of their stepper motors? Would that work? Quote from: hello. Thanks for the response Lefty! I completely understand what your saying about the modified 'continuous rotation' servos.
I will be avoiding them. I am intrigued about the absolute travel motors you said that could be purchased? Do you have any links or search terms for this? Sounds to good to be true! Also I guess with the stepper motor route then yes it does become a software challenge and I think some compromises. Thanks again. Or you could couple the gear motor to an absolute position digital encoder disk the more bits, the greater the precision - but also more expensive.
As the motor turns and turns the potentiometer or encoder wheelyou monitor the position of the potentiometer via an analog input or the position of the encoder wheel via digital inputsand when it arrives at the desired position, you turn the h-bridge off. Your code might also have some simple logic to determine which way to turn the motor based on current location for shortest distance to reach the desired position. You might also incorporate some "acceleration easing" to slow down the motor as it comes near the desired position similar to a PID.
I will not respond to Arduino help PM's from random forum users; if you have such a question, start a new topic thread. Thanks guys. Theres a catch right? That looks like a perfectly normal servo that has a degree range - sail winch servos tend to have a larger available amount of rotation than the 'regular' ones. Hey Thanks Lefty!DIY Sail Winch.
This is necessary so that your winch will turn freely. To test this try to get the gears set up so that they will engage each other and they are on axles that are fixed in place. You could do this if the axles are the same diameter and are placed in a vice. If the two gears turn freely without binding you have a winner. We have designed a kit including the two gears with an integrated drum and a base plate which fits the MG servo to save you a lot of work, the kit can be ordered from RCSails Web Shop.
The sail sheeting system needs a certain pulling force and a certain length of travel. The torque is given by the servo power and the length of the servo arm. The longer the servo arm, the greater the travel, but the less the torque.
The idea behind a drum winch servo is to rotate the servo for several turns to increase total travel with higher torque.
For the MG this means: Torque 15 kgcm at 6v with 0. For a drum of 2 cm radius torque is 7. If the same servo turns 4 turns torque is the same 7.
Follow twitter. Here are four most popular commercial sail winches used in boat classes between 90 cm and 1. Or, you can build your own drum winch as follows. The MG compatible servo is very cheap and stocked by many merchants around the globe. You will need : - MG servo - multi-turn potentiometer like Bourns H 5 kOhms - Screwdriver - soldering iron - thin plywood, epoxy or carbon plate - metal file - shrink tubing - Two gears of the same pitch or same size teeth.
We have designed a kit including the two gears with an integrated drum and a base plate which fits the MG servo to save you a lot of work, the kit can be ordered from RCSails Web Shop The sail sheeting system needs a certain pulling force and a certain length of travel. With a good plier you can pull the pin out. Replace the cover over the gears. Sail Boats. Power Boats. The MG Servo. The Multi Turn Potentiometer. Open Servo 4 screws underneathunsnap the top cover and locate the steel pin that prevents full rotation of the servo.
Identify the three wires that go to the servo's potentiometer, remove the screw that holds the potentiometer in place, and remove it.We give customers these instructions printed on paper and also email them as. It is working just great. I found it useful to be able to leave clients with the handout knowing that I just maximised my chances of being left a positive review.
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Sail Winch Servo 25T 10.63kg / 0.9sec (360deg) / 55g
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