Guiding device for a positional adjustment having a lead-screw

A guiding device for a positional adjustment having a lead-screw, and the guiding device comprising:

• a carriage rest adapted to be movably mounted a linear track of the adjustment, the carriage rest having at least one through hole defined therein;
• and
• a controlling device received inside each at least one through hole of the carriage rest and adapted to be mounted on the lead-screw of the adjustment, each controlling device comprising:
• a pressing post having at least one tooth formed on a bottom portion thereof, wherein the at least one tooth is adapted to mate with a thread of the lead-screw of the adjustment;
• a resilient element mounted on the pressing post and abutting the pressing post;
• and
• a bolt mounted on the carriage rest and compressing the resilient element;
• wherein the resilient element is compressed to make the pressing post to vertically move in each at least one trough hole of the carriage rest to keep the pressing post mating with the lead-screw, therefore, the resilient element provides a resilient force to spontaneously adjust a relative distance between the carriage rest and the lead-screw so that positional adjustment is moved in an exactly horizontal movement.