Otis Gen2 Scratch -

, which is known for its quiet, gearless operation and unique flat-belt technology. Overview of Gen2 Scratch Simulations

A 20-story residential tower in San Francisco had suffered from an intermittent "scraping scratch" on its Gen2 car for eight months. Three different maintenance providers had cleaned the sheave, replaced the roller guides, and even swapped the VFD drive—all with no success. otis gen2 scratch

For uneven tension or minor misalignment: , which is known for its quiet, gearless