Impossible to Calibrate iMZ320


I've calibrate correctly one of my iMZ320 printer by using the Zebra setup utilities to stop automatically the label at the black mark.

The second one is not working and I don't know why.

The label stops just 1cm after the black mark.

I think that just need a calibration but when I try to send ~JC it's only printing ~JC on the printer.

I tried to send the command to make the printer reading the zpl code but it seems like the command is sent to the printer but nothing happend after that.

Any idea?

Thanks for your support