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Frequently Asked Questions

What is servo tuning?

FAQ about PMC Motion Controllers
A servo is a type of closed-loop feedback circuit. A servo motor works by comparing the motor's actual position (as read from a feedback device - usually a position encoder) to the desired position (as calculated by the motion controller) and by dynamically adjusting the motion controller's command output signal so as to try to minimize the difference (error) between the two.
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How can I optimize the tuning on a Pacific Scientific digital servo drive?

Pacific Scientific | about us | company | corporate | info |...
To optimize tuning for a system that is oscillating. Start by setting ENABLE=0, ARF0=1000, ARF1=1000, KVI=0, KPP=0, KVFF=100, KVP=0.01. The motor should be quiet and without vibration. CAUTION! Do not perform this operation on a vertical application. The load will drop to the ground. Change ENABLE=1. Slowly increase KVP by 0.02 increments, pausing 1.0 sec between changes until the motor oscillates. Disable the drive with the hardware enable\ input. Reduce ARF0=400 and ARF1=400. Enable the drive.
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What is SERVO?

SERVO MAGAZINE - SERVO FAQs
A machine that can sense and react to input and cause changes in its surroundings with some degree of intelligence, ideally without human supervision. A "SERVO" is one of the base construction units of a robot. It converts a command into some type of action. SERVO Magazine is dedicated to the "Next Generation of Robotics Experimenters", devoted 100% to robots and robotics.
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What is tuning?

FAQ's The Piano
Tuning is the process by which the piano is brought into sonic regulation with itself. The process of tuning is a multi-stage process. The tuner begins by setting the instrument to the pitch to which it is to be tuned. He then performs the setting of the "temperament." This is the 12-note pattern that governs the entire tuning of the piano. It is based on a mathematical formula that dictates that all the notes in this 12 note pattern be spaced equally apart in distance from each other.
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Piano Expectations - Frequently Asked Questions
Each of the 88 notes on a piano has one, two or three strings. (Some pianos have more or fewer than 88 notes.) Over time, the piano will go out of tune due to changes in relative humidity. Changes in humidity expand and contract the wood of the piano, thereby altering the tension of the strings which affects the pitch of each string. In addition to changes in humidity, piano strings stretch with time, causing the piano to drop in pitch.
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What exactly is the Buzz Feiten tuning system?

Frequently Asked Questions
In short... moving the nut about a millimeter closer to the first fret. You were expecting a long technical answer weren't you? Now you know why they try to keep everything about it a secret... but wait, there is more! Once this modification is done, you must use a special electronic tuner that has built in Buzz Feiten offsets to tune your guitar. You'll also have to learn a new method of string to string tuning for when you don't have your "special" tuner handy.
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Chiptuning, Performance Tuning and Remapping Frequently Aske...
All RICA ECU upgrades for petrol cars are optimised for use with 98 RON super unleaded for maximum performance. For diesel engines, a high quality diesel fuel such as BP Ultimate or Shell V-Power is recommended. Using low octane premium unleaded fuel will not allow your engine to achieve its maximum potential from the Chiptuning and may in extreme cases result in engine damage under high load conditions. If you must use low octane fuel, you must not drive the car hard.
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TESCOM FAQ's - Frequently Asked Questions
Tuning is the selection of the proper values for your P, I, and D gains so that the system gives you the optimal performance characteristics that include speed, stability, and agility.
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What is Dyno tuning?

Rules, Frequently Asked Questions, Support - Topshift.com
Performance is the key to winning races, Dyno tuning is the method to increase the performance of your car. Each time you make a change by purchasing a new performance part, you must hit the Dyno to tune the vehicle for the changes that you made. Dyno tuning will improve the power output of your car - if done correctly. Tuning on the Dyno involves carefully changing the Air/Fuel Ratio to match the optimum ratio for your type of motor.
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What is tool tuning?

UF High Speed Machining FAQ
Recent research by Winfough, Smith, Tlusty, Halley, and Davies et al. [1-3] has suggested that, rather than assuming fixed dynamics, the tool point frequency response can be varied by adjusting the tool overhang length in a method referred to as tool tuning.
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Q59: Is tuning necessary or is there an automatic tuning?

Electroflow FAQ's
A : ElectroFlow is pre-tuned according to the measured load of each transformer during the time the unit is manufactured. Subsequently, calibration is required only if ElectroFlow is not functioning at its optimum.
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What is alternative tuning?

uk.music.guitar -- frequently asked questions
Standard tuning on guitars is EADGBE but there are other possibilities which can change the entire timbre of the guitar. Naturally chord shapes are a little different but alternative tuning can open a whole range of possibilities for both the fingerstyle acoustic and electric guitar player. One of the simplest is known as the dropped D tuning. In this tuning, the bass E string is simply detuned down a tone to D.
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It is confusing that there are so many different ways of tuning it up. What should I do?

FAQ
This is, of course, up to you. You need to decide what you want your bike to do. If on the track, go for full on jet kits. If on the street, maybe simpler measures might be worthwhile. Fit 3/1 Micron/Sebring/Staintune all are expensive, but the sound and improved accelleration is worth it. The jury's still out: only beneficial if your fuel is crap and needs more burn time (see Jim Bazz' experience on his Daytona 1200. He is not very big on the timing rotor at all.)
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What further tuning is possible?

Chiptuning, Performance Tuning and Remapping Frequently Aske...
Chiptuning is often refered to as 'stage 1' tuning. However, further tuning is always possible. The sky is the limit and depends largely on your budget, but it is not always economically viable for every car. More power costs more money, and the cost of tuning often increases exponentially when trying to extract more power, so essentially the higher the level of tuning, the lower the value for money for the power you actually get, especially when compared to software tuning alone.
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What is the frequency in Hertz of each of the tuning forks?

American Diagnostic Corporation - Frequently Asked Questions
The model for each tuning fork represents the vibrational frequency measured in cycles per second (cps) or Hertz. For example, the C128 vibrates at 128 Hertz or 128 cycles per second.
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Is SERVO available in a digital format?

SERVO MAGAZINE - SERVO FAQs
Yes! SERVO Online is an exact replica of the print edition. It provides the same visual experience, but is delivered and viewed via the web, using Published Web Format (PWF) technology. It enables readers to link directly to advertiser information and additional web content referenced in articles. SERVO Online is viewed via the web and is printable and downloadable.
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Can I cancel SERVO Online if I decide it's not for me?

SERVO MAGAZINE - SERVO FAQs
Yes. Just login to our Online Subscriber Services, Update Account Info by Clicking Here. Once logged in, uncheck the "Grant access to the online edition" box.
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My Servo can move wider angle than I expected, why is that?

FAQ
TXServo unit can product signal pulses from 250usec (microsecond) to 3500usec easily due to electronics working at 24Mhz. Most of the time, you shall see specification of 1.0 ms or 1000usec to 2.0ms or 2000usec. Testing with TXServo can show the real capabilities of your Servos because it can produce a wider range of signal to test your Servos. Signal can be produce in +/-1usec increments by microcontroller inside TXServo.
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Is the HYDROVANE a servo pendulum system?

Servo Pendulum Self Steering - Hydrovane Selfsteering
In jargon the HYDROVANE is called an 'auxiliary rudder' type of system. It means that it is steering the boat with its auxiliary or extra rudder.
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What is the difference between stepper and servo?

FlashCut CNC - Windows CNC Software and CNC Controls
Stepper motor control is the most cost-effective way to control a machine tool. The accuracy is exceptional, and the price is very reasonable. The only limitation is that the maximum speeds for rapid moves and cutting moves are not as high as for servo control. Servo control uses feedback from an encoder to constantly monitor the machine tool_s exact position. Using the feedback signals, the control system can achieve very high speeds and perfect accuracy, even under very strenuous conditions.
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Question: What signals go from a receiver to a servo?

Model Airplane FAQ
The servos are supposed to get a block-shaped pulse with a fixed frequency, with the duty cycle varying to control the position. A 1-2ms pulse every 20ms (which corresponds to 50 Hz) will give you full travel, with 1.5ms being in the center, 1ms at one extreme and 2ms at the other.
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Question: How can I reverse my servo?

Model Airplane FAQ
You can reverse a servo quite easily, if you have expertise in soldering. Use a small iron, maybe 15-20 watts with a very fine point, and use rosin core solder only. Get help from someone who has experience. Open the servo and reverse the 2 wires going to the motor. If the motor is connected directly to the PC board, close the servo up and buy a reverser. You also have to swap the 2 outside wired on the potentiometer, which is WAAAAY down inside the servo case.
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Why are my servo motors noisy? Is this normal?

Frequently asked questions
Yes, these are low cost servos. They are chosen to make this an affordable first robot kit. You could replace these with high performance metal gear servos from tower hobbies at: But, the cost for two servos are more than the entire Norland robot kit! You may be able to help the noise by disassembling the servos, clean and re-lubing the gears with white grease. Sometimes a small chip of plastic from the manufacturing process will show up on the gears and cause noise.
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What is the difference between a velocity mode servo amplifier and a current mode servo amplifier?

FAQ about PMC Motion Controllers
A current mode amplifier has an internal feedback loop that uses the measured electrical current going to the motor as feedback. Since motor torque is proportional to the electrical current driving the motor, a current mode amplifier is also known as a torque mode amplifier.
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How does the K3 passband tuning work?

Elecraft K3 FAQ
The K3 includes passband tuning. It's designed to take maximum advantage of its large number of crystal roofing filters and IF DSP in combination. There are two sets of controls: SHIFT/width, and hi-cut/lo-cut. Tapping a single button switches between the two. An optimized DSP graphic on the LCD sits just above the knobs, and shows you at a glance whether the passband has been shifted or narrowed as a result of using these controls.
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