I use Raspberry Pi connected to a Zebra GX430t with CUPS. I use the "Local Raw Printer" driver and I send the ZPL directly to the printer using Python.
I use the termal transfert mode, but I have a problem with the printer (300dpi), because the printing of the datamatrix is quite blurry, so I can't read it.
I emailed the Zebra support, and they told me to modify the temperature of the printing head, but I have no clue on how to do it with ZPL. I also have to modify the grayscale with ZPL. Do you know how to do one of this commands please ?
Plus, could you confirm that ^MTT is the command to set the printer to Thermal Transfert and that ^PW is used to set the width of the label ? Is the configuration saved in the printer, even when turned off, until the configuration change ?
Use ^MDa command. where a is the value of the darkness level. Value is 0 to 30 in increments of 0.1.
Yes, ^MTa sets printer mode where a is the setting, T= Thermal Transfer, D= Direct