For example: G1 X0.5 F1 Will use syringe pump X and will deliver 0.5 mL of liquid at a speed of 1 mL per minute. Multiple syringes can be used at the same time: G1 X0.5 Y0.5 Z0.5 F1 Will deliver, at the same time, 0.5 mL of liquid from the pumps on X, Y, and Z at a speed of 1 mL/min For using different flow speed for different pumps, the total amount of liquid should be calculated taking in account that all the pumps will reach the end at the same time. For example: G1 X2 Y1 Z2 F1 Will deliver the set amount of liquid at different flow speed, using 1ml/min on Y, and 2mL/min on X and Z.