F4d2 technology for the optimised control of "The Clever Drive" motor is based on an innovative f4d2 technology (Fast Forward Feed Full Digital Drive) which, thanks to the speed of the calculations for current regulation, performed by the DSPC of the drive according to a patented proprietary innovative algorithm, allows for the high-frequency chopper motor to be energised.
The sinusoidal phase currents free from parasitic harmonics obtained in this way, provide for the silent rotation of the rotor without jerks and resonances, maximum torques at any speed and high drive efficiency.
Servostep drives are also based on the rapid current regulation of the f4d2 firmware. With these servostep drives, Ever Elettronica has extended the control of the stepper motor from the traditional microstep open loop to closed loop in stepless mode, with the sinusoidal excitation always synchronous, unlike the microstep drive which does not exclude the loss of pitch synchronism, even in the presence of rapid motor accelerations.
F4d2 technology (Fast Forward Feed Full Digital Drive), thanks to the sinusoidal regulation free from parasitic and high frequency chopper harmonics of the phase current, obtains from the drive a silent rotation of the motor without resonances, maximum drive torques at any speed, high efficiency.
With servostep drives, developed from this performance, Ever Elettronica has extended motor control from the tradition microstep open loop to closed loop stepless mode, sinusoidal excitation of the motor phases always synchronous, even in the presence of rapid motor accelerations, unlike the microstep drive that does not exclude the loss of the pitch synchronism.
The servostep drive is made by back-feeding the motor with an incremental or absolute encoder with resolution depending on the dynamic precision required by the application.
It is usually possible to obtain even with cheap, low-resolution encoders (400 imp/revolution) performances that can be obtained with Brushless systems, that try to simulate the operation of a stepper motor, only with high-resolution encoders.
In servostep systems, the reaction with an encoder does not simply consist in the recognition of the loss of pitch during or after the motor movement, but it guarantees the continuous synchronisation of the rotor movement.
Stepless phase excitation characterises servostep systems with an optimised excitation angle as a function of the speed that allows for a pitch resolution higher than that of the microstep technique and avoids resonances due to the structure of the motor and the oscillations of the rotor around the final position.
Moreover, it maximises the torque generated as the speed changes and the response speed of the motor to load variation, obtaining good dynamic performances in the presence of almost purely inertial loads even without the need to perform mechanical resonance research (FFT) and analyse the module and phase of Brushless drives.