Z Dropping too Fast. Then stops

I am new to CNC. I am trying to flatten my wasteboard. I have uploaded my program, set my xyz, rewound the program and hit start. The router goes to its position then drops down to start cutting. But it drops aggressively then stops the program. I’m sure it’s something obvious that I can’t see. Can anyone help advise me?

Please contact support at support@onefinitycnc.com and they will be happy to assit you!

So depending on what bit you are using, under the tool management tab there is a plunge depth rate speed that can be adjusted. Perhaps for that bit there’s an extra zero for the rate