Since most drives are designed to run a wide range of horsepower motors, it is important to calibrate the Current/TQ limit to match the motor being used. If the limit is set too low, the motor will not be allowed to draw enough current to perform its job. A drives user manual typically has approximate setting for various HP motors. In most cases, setting the current limit to 100-150% of the motors continuous duty rating will be adequate. Check to make sure the motor is sized properly for the application. An undersized motor will not be able to perform the work required regardless of how much current you allow it to draw. Measure the motor current draw and if it exceeds the continuous duty rating, the motor may be too small. AC motors drives tend to have a boost adjustment that when turned up will provide an extra boost of current at the lower end of the speed range to help move loads that are stationary.