Resonance is an unstable condition when running a step motor. Resonance usually occurs between 2-4 rev/sec and can be alleviated in most situations by putting a load on the motor, changing from full stepping to half or microstepping, or increasing your acceleration through the resonance zone.

A stepper motor controller, more generally called Motion controller, is a system that control the rotation of motors (stepper, brushless, sevomotors) with the purpose of moving a mechanical (axis in CNC machines) to a determined position. Motion controller must not be confused with motors drivers that are the power part of a positioning system. The firsts are those systems based on a PC that give the signals for the motors through the parallel port. See similar questions...

The resolution of an axis system moved by stepper motors depend uniquely by the mechanical. The stepper motors have generally a 1.8? step angle so they make a complete rotation with 200 step when drive at full step. For example, if the motor drive a screw of 4 mm., a complete turn will make a displacement of 4 mm. and so the resolution will be 4/200 mm= 0.02 mm. Obtaining a mechanical with backslash less than this is very difficult. See similar questions...

The moderns stepper motors can reach rotation speed of 1500 RPM. It must be considered that the motor torque curve decrease considerably with the increasing of the step frequency. If we take a screw of 4 mm and we run it at 1500 RPM we obtain a displacement speed of 1500*4mm=6000mm/min or 6 m/min. In practice the stepper motors runs at max 600 RPM because the torque decrease above that values. See similar questions...

I like servo motors because: they are quiet, more power at high rpms, machines can move at least three times faster than steppers, rotational movement is smooth instead of jerky. See similar questions...

Servos produce more torque at any speed than comparable stepper motors. This can be up to 400% more torque for equally rated motors. Servos are under closed-loop control via their encoders, allowing additional power to be sent to the motor when resistance is encountered. Steppers, on the other hand, will simply stall and lose their position relative to the control -- resulting in improperly machined parts. See similar questions...

Most stepper motors have class B insulation which is rated at 130 degrees C. Motor case temperatures of 90 degrees C will not cause thermal breakdowns. Motors should be mounted where operators cannot come into contact with the motor case. See similar questions...

For safety reasons, an engineer wants to know how long it takes for a drive's DC Bus to dissipate once the main power is disconnected. In theory, the drive's bus will never dissipate completely due to the logarithmic behavior of the DC Bus capacitor but in actuality we can do the calculations based on a final voltage that approaches zero volts. The minimum amount of time required before the drive dissipates the voltage can be worked out as follows: Motor Resistance (D062M) = Rm = 3. See similar questions...

If you are only operating one stepper motor using any of our boards which have the GenStepper firmware installed, and if that motor does not require use of the Double Current Mode of operation, then you may operate up to 2 relays at the same time as you operate the stepper motor. The manual is in Adobe Acrobat format, and is available from our downloads page here. See similar questions...

A vibration of large amplitude caused by a relatively small or nearly the same period as the natural periodic stimulus of the system and or enhancement or particle reaction or a scattering event by excitation of internal motion in the system. An example would be an opera singer shattering a glass with his or her voice. See similar questions...

The first way, in the core rules, simply allows them to build up an emotion and thrust it upon someone else. The second way, detailed in the Infernal Player's Guide, allows them to enhance whatever emotion(s) the subject is feeling at the moment. It can be used "pot luck" or in conjunction with the third method, below. The third way is to take a penalty to Perception equal to the maximum check digit result they want to get, and use the Elohite resonance table (In Nomine, p. See similar questions...

Resonance Health (RHT) is an Australian Healthcare company specialising in the development and commercialisation of magnetic resonance imaging (MRI) related technology for the quantitative measurement of iron levels in the human body. Our mission is to develop and market our technologies to assist in the diagnosis and management of patients suffering from iron related conditions, whilst delivering significant added value for our MRI customers who deliver our service through their networks. See similar questions...

Yes, you can have an MRI done safely and effectively with no ill side effects or diagnostic problems. However, you should inform the physician performing the MRI procedure that you have permanent cosmetics. Since the micropigment contains iron oxide, this metallic substance can interfere with the electromagnetic fields used in MRI procedures. To avoid a potential problem, technologists use gel filled goggles, or a cream, to cover the area where iron oxide is implanted. See similar questions...

While ordinary radiography and CT utilize the interaction of x-ray (electromagnetic wave) with tissues of the body to produce images, and ultrasonography utilizes sound waves, Magnetic Resonance MR utilizes magnetic waves. In MR the patient is placed inside a big magnet where its strong magnetic field forces all hydrogen atoms nuclei (protons) of the body to be aligned parallel to it. The protons start to rotate (precess) at a certain known specific speed (frequency). See similar questions...

Once per round as long as they are successful. Unlike Seraphim who resonate for the unalterable TRUTH, Elohim plumb the constantly changing emotionscape of a human psyche. GMs who don't want to deal with the constant risk of Intervention may make a house rule that allows the Elohite to sense emotions over time, though, using just one check digit. On a 3 or higher, the Elohite will get the motivating factor for the emotion. In general, this is a pretty vague description. See similar questions...

The resonance continues for 10-CD minutes on the first person the Seraph hears speak after invoking resonance. It does not work on just anything heard in this time period. (GMs should be sparing with having no-nothing sidekicks interrupt the person the Seraph wanted to target, though, and background noise (radios, TVs, etc.) can be easily ignored.) See similar questions...

Single objects: Any creature, a small collection of objects that are touching (a bag of marbles), a door, the wheel of a car (plus probably a part of the steering column), etc. Size is important here! Calabim have a general field of entropy that can be focused to do specific damage, but even then they can't get it precisely narrowed down. Generally the range is between a foot in diameter up to about the size of a human body. See similar questions...

In most cases weight matching of the pistons and rods/rod bolts is all that's required. The inline six is naturally balanced against first and second order harmonics and the crankshaft/counterweights usually don't require spin balancing, but having this done will improve engine smoothness at high rpm and lessen harmful vibrations. The Jeep I6 motor is internally balanced so the addition of the flywheel and harmonic balancer isn't necessary for the spin balancing procedure. See similar questions...

The Austin Air Cleaner's Permanent Split Capacity motor costs 50% less to operate than most other air purifiers' motors. The motor uses 90 watts of electricity when run on high. The motor is capable of running 24 hours a day and it will not overheat. See similar questions...