Speeds and feeds deep drilling

[Jonathan]

Thanks fellas turning the amps may have helped?

Until the iron saturates, torque is proportional to current, so yes it's likely to help. Keep an eye on the motor temperature though - no more than 80°C on the case is allowed. Do you have the model number of the motors so we can check what current they should be run on? Iff the motors, drivers and power supply are safe operating from 3.5A you might as well put them all on that current and get better feedrates or reliability.