Qualcuno di sa quale è la frequenza massima di step in uscita con emc2?
So che i dati sono molto variabili, se qualcuno potesse farmi qualche esempio ne sarei felice.
Half stepping
When half stepping, the drive alternates between two phases on and a single phase on. This increases the angular resolution, but the motor also has less torque (approx 70%) at the half step position (where only a single phase is on). This may be mitigated by increasing the current in the active winding to compensate. The advantage of half stepping is that the drive electronics need not change to support it.
Microstepping
What is commonly referred to as microstepping is actually "sine cosine microstepping" in which the winding current approximates a sinusoidal AC waveform. Sine cosine microstepping is the most common form, but other waveforms are used [1]. Regardless of the waveform used, as the microsteps become smaller, motor operation becomes more smooth, thereby greatly reducing resonance in any parts the motor may be connected to, as well as the motor itself. Resolution will be limited by the mechanical stiction, backlash, and other sources of error between the motor and the end device. Gear reducers may be used to increase resolution of positioning.
Step size repeatability is an important step motor feature and a fundamental reason for their use in positioning.
Example: many modern hybrid step motors are rated such that the travel of every full step (example 1.8 Degrees per full step or 200 full steps per revolution) will be within 3% or 5% of the travel of every other full step; as long as the motor is operated within its specified operating ranges. Several manufacturers show that their motors can easily maintain the 3% or 5% equality of step travel size as step size is reduced from full stepping down to 1/10 stepping. Then, as the microstepping divisor number grows, step size repeatability degrades. At large step size reductions it is possible to issue many microstep commands before any motion occurs at all and then the motion can be a "jump" to a new position.
20Khz e´ un valore veramente scadente.bigfefi ha scritto: Comunque 20kHz di porta parallela con motore da 1000 passi arrivi a 20 giri/s, ovvero 1200 rpm, ragionando sulla parallela.