RedSail MODEL (RC720C) Linux Step #1 Plugin Plotter serial USB port to Computer Step #2 Open Terminal 1. Check driver install - $ lsusb 2. Install inkcut - pip3 install inkcut Step #3 Terminal > inkcut 1. Edit > Settings > Connection >SERIAL 2. Select Serial port > /dev/ttyUSB0 Step #4 Premission 1. sudo chmod a+rw /dev/ttyUSB0 Step #5 1. Check the control 2. If you select up down key your Plotter is Responsed (Success) I have this buffer issues so i do this step Step #6 1. Advanced > speed 1.5/ms Enable Now working But Not perfect in future inkcut tweek the output Windows Step #1 Plugin Plotter serial USB port to Computer Step #2 1. Install driver