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Torque Calculation

Created by: List at: 6/25/2012 1:41 PM (1 Replies)

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6/25/2012 1:41 PM	Rate (0)
List Posts: 664 Rating: (17)	Hai All, Please anyone answer me the basic doubt about how to calculate the torque of a motor for an axis, I will try to explain my question with example... I am having a Turning Center, I have to retrofit this machine into CNC.Having two Axis,X and Z.and Spindle. I have to calculate the Static and Dynamic Torque for this axis, My X axis is Vertical axis and axis length is 4 meter,Having Ballscrew of 10mm,and having turret of 8 position with 100Kg weight. With this Parameter how can in calculate/select servo motor for this Axis.?? Is needed any other parameters ??? Thanks&Regards, Raj
List Posts: 664 Rating: (17)
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6/26/2012 2:52 PM	Rate (0)
Technology Team Platinum Expert Joined: 10/11/2006 Last visit: 11/14/2024 Posts: 5941 Rating: (816)	Hello, I would recommend to use the dimension tool SIZER: https://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo&idxsrc0=step7&nav0=tree&nodeid0=10803975&lang=en&siteid=csius&aktprim=0&extranet=standard&viewreg=WW&objid=10804987&treeLang=en It's really a great tool to dimension a motor, cable, controller... You start with the mech. data and cycle and the result ist torque and speed. Afterwards you can select a suitable motor. Without that tool it's very time expensive. Some useful formulas: M = J x alpha with M = torque, J = inertia, alpha = angular acceleration alpha = delta n / delta time You have to translate the linear weight to the rotational inertia depending of the ball screw ratio. Through the vertical axis you have to consider the torque through the mass but also through the gravity. I think some generally formulas you could also find via web / google.
	With best regards, Technology Team Application consulting and pre sales support for SINAMICS, SIMATIC Technology, SIMOTION, SIMOTICS and MOTION CONNECT
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