I bought a Powermatic 18" planer with a three phase motor. I would like to know how long it should take to go from a dead stop until it is at full speed and also how long to coast down to a stop. I need this information to set the VFD acceleration time. I am guessing 3-5 seconds. I do not see a coast down function on the vfd so I have to input a deceleration time.
I do know that a general rule of thumb is acceleration and deceleration should be 3 seconds or more when there is only moderate spinning inertia. Going any faster can strain gears and pulleys. Once that planner is up to speed there is a lot of metal spinning around.
Bill D