Hi,
Does anybody know how much preload I can put on a 20 degree rack and pinion without wearing it out quickly? I can find specs for the tangent force, the force that shears the teeth off.
On the x axis I would like to use 2 v bearings and two spur gears. The v bearings would be below the spur gears and they would push the spur gears into the rack. One spur gear would be free wheeling bearing, the other spur gear would move the gantry.
The preload serves 2 purposes. First it holds the V bearings tight on their track. Second it reduces backlash.
Thanks
Dan