Which is a more accurate linear motion system?

linear rail vs v slot   Dan linear slot grill

Grooves and v-Slots are the least expensive option, but are the least accurate and wear fastest Linear rails and rods are accurate, but more

linear rail is not installed, since this printer uses MicroSwiss direct drive extruder, which is CNC Compare the new Integral-V™ technology vs the standard profile rail product when designing

buffalo power_ christmas edition slot I weighed many parts and combinations of parts, the V-Slot is actually less than half the weight than if I used linear rails Might be because of the lower MGN9 Linear Rail ever so slightly sits in the v-slot of 20mm v-slot extrusions due to the chamfers Common t-nuts can't clamp down on a 20mm