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View Full Version : Ball screws htto 07-19-2007, 02:25 AM Hello, which setup will give me more torque? Ballscrew with 2mm pitch and direct drive or ballscrew with 4mm ptch and beltgear ratio 1:2 ? Both same steppermotor. philbur 07-19-2007, 03:28 AM Simple mechanics says they are the same. However the direct route is invariably the more efficient. Regards Phil Hello, which setup will give me more torque? Ballscrew with 2mm pitch and direct drive or ballscrew with 4mm ptch and beltgear ratio 1:2 ? Both same steppermotor. Pres 07-19-2007, 04:23 AM .... However the direct route is invariably the more efficient. True, but only if you disregard stepper harmonics. Pres philbur 07-19-2007, 04:35 AM How does stepper harmonics effect torque transmission.:confused: Regards Phil True, but only if you disregard stepper harmonics. Pres project5k 07-21-2007, 07:30 AM hmmm interesting, the motor would still be turning the same rpm to make the same travel... but one benifit of the belt setup is that in the future if you wanted to change the drive ratio, you would have that option... |