BEFORE trying it on wood....Just drive it around at various speeds with a hand on the frame....some WILL be smoother...write down the smooth feeds(MY machine hates 1.3IPS on 2 axis moves)
Do the same for Plunge speeds....
Do the same for different RPMs on router spindle....
TRY to use the Sweet feeds and speeds.
Then try 3D cuts "Air Cuts" (rastering along the gantry is usually most stable, as less mass involved)
So long as bit is close to room temp at end of real cut, and cutting CHIPS(however small the chip is)....you have a good combo, and can usually increase feed/speeds proportionally in Sweet Spots until cut quality degrades....and then back off 10% or so until it's at YOUR quality.
Basically just learning YOUR machine
Hope the heck it helps in any way!