You are correct that the ZT420 can printer faster. It should be capable of printing 12 in/sec.
You actually are able to adjust the printer settings through a regular Zebra printer in the CUPs driver. To do this, create a .txt file with the commands to configure the printer. You can use any SGD or ZPL commands in this file. You can try this command to increase the print speed:
! U1 setvar "media.speed" "up"
The "up" increments the speed of the printer by one. your can use "down" to increment it down, or a numerical value "2" through "12". You can also use the follwing commands to set the printer to it's factory defaults, if that's what you want to do:
! U1 setvar "device.restore_defaults" "all"
! U1 setvar "device.reset" ""
A carriage return after all commands are necessary. Then, use the Terminal and the following command to send the file to the printer raw:
lp -o raw -d printerNameInCUPs fileName.txt
Hope this helps,
Thanks for your reply,
I will try your suggestion, however this is still Socket connection and we do not have any speed problem with printing RAW, it is already fast but giving a weird problem, printer LCD starts to flicker and printer doesn't respond any other regular prints until a full hard restart. ZPL above might help, I will give it a try.
When printer gets crazy gives this error: WARNING RIBBON IN
I do many things to get rid of this message, it doesn't print anything until this warning is gone.
I still want to test the IPP connection with ZT420, it seems to be the best option and I still can not figure out how to connect CUPS to ZT420 with IPP, how you tried this before?