Rotation adjusting mechanism and adjusting machine using the same

A rotation adjusting mechanism, comprising:

• a first pedestal comprising a first sliding portion, wherein the first sliding portion defines a first sliding surface thereon, the first pedestal defines an adjusting hole in a side surface thereof and an elongated hole on the first sliding surface, and the elongated hole communicates with the adjusting hole;
• a first sliding block defining a second sliding surface and comprising an engaging portion on the second sliding surface, the second sliding surface movable abutting against the first sliding surface, the first sliding block further defining a locking hole on a side surface thereof;
• a first adjusting member partially received in the adjusting hole, a portion of the first adjusting member being partially exposed out of the elongated hole and engaging with the engaging portion of the first sliding block, the adjusting member being exerted by an external force to rotate to enable the first sliding block to slide along the first sliding surface;
• and
• a first latching member partially received in and engaged with the locking hole of the first sliding block, an end of the first latching member protruding out of the locking hole and resisting on the first sliding portion to position the first sliding block on the first sliding pedestal.