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L6470 microstep positioning

Question asked by Ant on Feb 27, 2014
Latest reply on Mar 24, 2014 by Enrico Poli
I mad some tests with L6470H in microstepping mode and it seems that microstep positioning is not possible with this device.

In my test a microcontroller will send a hard stop command to the motorcontroller when an external signal is detected. The controller works in 32 microstep mode, the holding current has the same value as the run current. The motorcontroller is performing a run command and wait for the hardstop command. I monitor the motor current as well as the external signal on th scope (see attached screenshots). After hardstop was received by the controller it can be seen on the scope that the motor currents are changing AFTER the hardstop and the motor keep on turning for about 10ms.