Under the Roberts' Rules of Order, can the presiding officer make a motion during the meeting of the board of ?

I'd like an answer to this question because as a presiding officer, I am often tempted to make a motion before the board of directors during meetings to speed up the body's deliberations.Under the Roberts' Rules of Order, can the presiding officer make a motion during the meeting of the board of ?Here you go, look it up: http://www.rulesonline.com/