[mícheál]

Excuse my basic observation, but the literature claims the accurate positioning eliminates the need for "costly and complex split and dual pinion systems". I still imagine you would opt for rack and pinion on both sides of your gantry? I don't know if this is called dual pinion.

[allanconway2]

Dual pinion does not mean separate rack and pinion systems driving opposite sides of an application. Dual pinion systems have two pinions operating on a single rack and are preloaded against each other to eliminate backlash. This is done with either a single motor with two coupled gearboxes or two separate servo drives where the controller maintains the preload.