What is Ramp Zero?
Ramp zero is the lowest speed the motors will go except for stop. If a motor is at rest and commanded to move ahead, ramp zero is the first pulse speed. In other words, a motor at rest will receive a pulse, then if ramp zero is set to 100, the next pulse will occur 100hz later, or 10ms and ramp up from there. Most systems run well with about 60-100 in this value, but the mechanics of all systems are different, so feel free to play around. If the ramping starts to get rough, lower the value.