Electronically controlled sample warper with yarn exchange mechanism

An electronically controlled sample warper, comprising:

• a yarn introduction member movably mounted on a distal end of at least one yarn introduction lever rotatably provided on a side surface of a warper drum for winding a yarn on said warper drum;
• and
• a plurality of yarn selection guides disposed, in correspondence with said yarn introduction lever, on an end portion of a base on which said warper drum is supported, each of said yarn selection guides being movable angularly about said base between a yarn exchange position in which it projects from said base for changing the yarn to another yarn, and a standby position in which it is retracted in said base for storing the yarn in the base,
• wherein said yarn introduction member and each of said yarn selection guides are cooperative with each other to undertake delivery of a yarn between them so as to wind yarns on said warper drum in the preset order with automatic yarn change,
• wherein said yarn introduction member has a yarn holding member movably mounted thereon, and
• wherein when the yarn is to be delivered from said yarn introduction member to one of said yarn selection guides, said yarn holding member moves in a first direction to release the yarn therefrom to thereby allow the yarn to be caught by said one yarn selection guide, and when the yarn is to be delivered from said one yarn selection guide to said yarn introduction member, said yarn holding member moves in a second direction to catch the yarn held on said one yarn selection guide.