Funtionality
With SD Enhanced SDM drives, the Digital Tracker c0420 firmware and the Tracker Setup software tool, besides the drive’s configuration parameters (step angle, current, internal ramp, functioning type, etc.) it’s possible to activate the following features:
- set ratio between the reference speed and the motor speed (Gear Ratio);
- set min and max full scale of the analog reference (0÷10V or – 10V÷10V);
- enabling/Disabling of the position and velocity feedback (open loop/closed loop);
- set tracking type (clock & dir, clock & dir with internal ramps, tracking of an incremental encoder, speed tracking of an analog signal);
- Advantages of Closed Loop Control compared to an open loop stepper solution: reliable positioning without synchronism loss; keeping stable and automatic recovery of the original position in case of positioning errors caused by external factors such as mechanic vibrations; 100% exploitation of the motor torque and ability to work at high speed in relation to the current control which is regulated in accordance with the load variations, where the normal open loop systems use a constant current control at all speeds without taking into account the load variations.
- Advantages of Closed Loop Control compared to a brushless servo-controlled solution: no need for power regulation (automatic current regulation according to the load variations); keeping stable of the position without fluctuations after the positioning completion; fast positioning favoured by the independent control of the integrated DSP; continuous and fast execution of short stroke movements thanks to the short positioning time.
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