A window blind manufacturer uses an adhesive to form a seam along the edge of the material. It is critical that the glue be applied evenly to aboid flaws; however, the speed that the material passes beneath the dispensing head is not constant. The glue needs to be dispensed at a rate proportional to the varying speed of the material.

Machine Objectives:

• Allow for varying material speed
• Dispense glue evenly
• Allow for multiple blind lengths

• Synchronization to material speed
• Encoder following capabilities
• Sequence storage

A step and direction indexer/follower and a microstepping motor/drive are used to power a displacement pump. The indexer/follower is programmed to run the motor/drive at a velocity proportional to the primary velocity of the material, based on the input from the rotary incremental encoder. This ensures a constant amount of glue along the length of the material.

Product Solutions: