Comparison of Transmission Methods of Different Rotary Tables

Type	Advantages of DEX’s Roller-Type Transmission	Worm Drive Transmission


Zero backlash	Rolling contact between the roller and the cam, no positive reversal backlash problem, greatly improving the ultra-precision characteristics of the roller cam, reducing the defect rate and improving the quality, which is a breakthrough for precision machining technology.	Friction extrusion conduction, worm gear easy to wear and short life.
Ultra-high efficiency conduction	Roller cam type turret conducts in rolling mode, reduces wear, high transmission efficiency, high speed operation, and conduction efficiency of over 90%.	Conduction efficiency 50~60%.
Prepressing	Yes	No
Maintenance-free	Due to low wear and low aging, it can maintain initial accuracy for a long time.	For the high-precision machining, the reverse direction will produce backlash, which will affect the processing quality.
Thermal displacement	Even at high speeds, reduce friction, reduce thermal displacement, improve quality stability, and reduce non-performing rates.	Accuracy reliability is not easy to maintain.
Braking performance	When the brake is positioned, the disc surface will not sway back and forth, and the positioning brake will remain within 2µm, which can highly demonstrate the precision machining quality.	Even if the optical scale is added, only the positioning accuracy can be solved, but when the backlash error is large, the vibration frequency during processing is high. (The surface roughness is poor), the optical ruler compensation compensates for the vibration frequency during processing and the wear of the tool is higher than roller cam type.
Long Life		Positioning Accuracy

Advantages of DEX’s Roller-Type Transmission	Worm Drive Transmission

Zero backlash
Rolling contact between the roller and the cam, no positive reversal backlash problem, greatly improving the ultra-precision characteristics of the roller cam, reducing the defect rate and improving the quality, which is a breakthrough for precision machining technology.	Friction extrusion conduction, worm gear easy to wear and short life.
Ultra-high efficiency conduction
Roller cam type turret conducts in rolling mode, reduces wear, high transmission efficiency, high speed operation, and conduction efficiency of over 90%.	Conduction efficiency 50~60%.
Prepressing
Yes	No
Maintenance-free
Due to low wear and low aging, it can maintain initial accuracy for a long time.	For the high-precision machining, the reverse direction will produce backlash, which will affect the processing quality.
Thermal displacement
Even at high speeds, reduce friction, reduce thermal displacement, improve quality stability, and reduce non-performing rates.	Accuracy reliability is not easy to maintain.
Braking performance
When the brake is positioned, the disc surface will not sway back and forth, and the positioning brake will remain within 2µm, which can highly demonstrate the precision machining quality.	Even if the optical scale is added, only the positioning accuracy can be solved, but when the backlash error is large, the vibration frequency during processing is high. (The surface roughness is poor), the optical ruler compensation compensates for the vibration frequency during processing and the wear of the tool is higher than roller cam type.
Long Life

Positioning Accuracy