Universal Gcode Sender Feedrate

Hello, I made a drawing robot and I use universal Gcode sender to control it. The only problem is it moves terribly slow, I tried doing an override to increase the federate but it just said, "overrides are not supported for this controller". I'm using an Arduino uno and I can find any other way to speed it up. If any body has any ideas or knows how to fix this it would be greatly appreciated.

reflash robot with modified FW, or send feedrate change commando

how do I do that?

how you flash it earlier?

Tell us what you set the speed to for each command. Your G-code supplies the movement speed.