One particular pinion drives the axis (the "master") when the 2nd pinion is "preloaded" to remove the backlash (the "slave"). The preload is produced electronically that has a special motor controller; these programs can also be build to travel with each other through cycle situations when backlash isn't crucial. Dean https://gunnergtgqz.glifeblog.com/31757624/about-gearbox-cvt