# Optimizing I-Gain

Navigation: Valve Firmware > Pressure Control > Softpump algorithm > Tuning > # Optimizing I-Gain |

I-Gain is responsible to reach the setpoint. If reaching setpoint is not important (e.g. setpoint is 0) leave the I-Gain at 0. Otherwise start with P-Gain set to half of the value found when optimizing P-Gain and set I-Gain to 0.1. Keep the P-Gain constant. Start again the pump down. Check how the pressure reaches the setpoint:

If the setpoint is reached too slowly increase I-Gain

If there is an undershoot increase I-Gain

Required information for support:

•Go to ‘Tools / Create Diagnostic File’ in ‘Control Performance Analyzer’ and save file

•Pressure / flow / gas conditions to be controlled

•Chamber volume

•Pumping speed (l/s) and pump type (e.g. turbo pump)

•System description

•Problem description

Send diagnostic file with and all required information to Mechatronic.Support@vatgroup.com .