The Standard Mini Mill Stiffness Calculations By Roger
![The Standard Mini. Mill™ Stiffness Calculations By: Roger Cortesi rcortesi@mit. edu http: //pergatory. mit. The Standard Mini. Mill™ Stiffness Calculations By: Roger Cortesi rcortesi@mit. edu http: //pergatory. mit.](https://slidetodoc.com/presentation_image_h/1f3331a5c4768317275f3ad00e93464e/image-1.jpg)
The Standard Mini. Mill™ Stiffness Calculations By: Roger Cortesi rcortesi@mit. edu http: //pergatory. mit. edu/rcortesi/ Precision Engineering Research Group Massachusetts Institute of Technology, Mechanical Engineering Department Room 3 -470 77 Massachusetts Ave. Cambridge, MA 02139 Phone: (617) 253 -1953 Fax: (617) 258 -6427 http: //pergatory. mit. edu/ Property of Roger Cortesi, MIT Precision Engineering Research Group. DO NOT COPY or TRANSMIT without written permission.
![Types of Stiffness Calculations • • Ball Screw Stiffness Servo Stiffness Carriage Translation Stiffness Types of Stiffness Calculations • • Ball Screw Stiffness Servo Stiffness Carriage Translation Stiffness](http://slidetodoc.com/presentation_image_h/1f3331a5c4768317275f3ad00e93464e/image-2.jpg)
Types of Stiffness Calculations • • Ball Screw Stiffness Servo Stiffness Carriage Translation Stiffness Carriage Roll Stiffness Property of Roger Cortesi, MIT Precision Engineering Research Group. DO NOT COPY or TRANSMIT without written permission.
![Standard Mini. Mill™ Ball Screw Stiffness Property of Roger Cortesi, MIT Precision Engineering Research Standard Mini. Mill™ Ball Screw Stiffness Property of Roger Cortesi, MIT Precision Engineering Research](http://slidetodoc.com/presentation_image_h/1f3331a5c4768317275f3ad00e93464e/image-3.jpg)
Standard Mini. Mill™ Ball Screw Stiffness Property of Roger Cortesi, MIT Precision Engineering Research Group. DO NOT COPY or TRANSMIT without written permission.
![Standard Mini. Mill™ Servo Stiffness The ball screw is really a wedge Property of Standard Mini. Mill™ Servo Stiffness The ball screw is really a wedge Property of](http://slidetodoc.com/presentation_image_h/1f3331a5c4768317275f3ad00e93464e/image-4.jpg)
Standard Mini. Mill™ Servo Stiffness The ball screw is really a wedge Property of Roger Cortesi, MIT Precision Engineering Research Group. DO NOT COPY or TRANSMIT without written permission.
![Standard Mini. Mill™ Carriage Translation Stiffness The carriage stiffness in the UP DOWN and Standard Mini. Mill™ Carriage Translation Stiffness The carriage stiffness in the UP DOWN and](http://slidetodoc.com/presentation_image_h/1f3331a5c4768317275f3ad00e93464e/image-5.jpg)
Standard Mini. Mill™ Carriage Translation Stiffness The carriage stiffness in the UP DOWN and SIDE directions in 4 times the truck stiffness in each of these directions. Star Linear™ Steel Truck Short (left) and Standard Truck (right) Property of Roger Cortesi, MIT Precision Engineering Research Group. DO NOT COPY or TRANSMIT without written permission.
![Standard Mini. Mill™ Carriage Roll Stiffness Lb 2 Trucks Lt Center of Stiffness Tool Standard Mini. Mill™ Carriage Roll Stiffness Lb 2 Trucks Lt Center of Stiffness Tool](http://slidetodoc.com/presentation_image_h/1f3331a5c4768317275f3ad00e93464e/image-6.jpg)
Standard Mini. Mill™ Carriage Roll Stiffness Lb 2 Trucks Lt Center of Stiffness Tool Force 2 Trucks Property of Roger Cortesi, MIT Precision Engineering Research Group. DO NOT COPY or TRANSMIT without written permission.
![Carriage Stiffness Comparison Between The Standard and Modified Mini. Mill™ Axial Stiffness 1 is Carriage Stiffness Comparison Between The Standard and Modified Mini. Mill™ Axial Stiffness 1 is](http://slidetodoc.com/presentation_image_h/1f3331a5c4768317275f3ad00e93464e/image-7.jpg)
Carriage Stiffness Comparison Between The Standard and Modified Mini. Mill™ Axial Stiffness 1 is the servo stiffness. Use if a linear encoder is used Axial Stiffness 2 is the stiffness of the ball screw, use if a rotary encoder is used See the Modified Mini. Mill™ Stiffness Presentation for the calculation of the its stiffness values Property of Roger Cortesi, MIT Precision Engineering Research Group. DO NOT COPY or TRANSMIT without written permission.
![Overall Machine Stiffness Estimates Between The Standard and Modified Mini. Mill™ The Standard Mini. Overall Machine Stiffness Estimates Between The Standard and Modified Mini. Mill™ The Standard Mini.](http://slidetodoc.com/presentation_image_h/1f3331a5c4768317275f3ad00e93464e/image-8.jpg)
Overall Machine Stiffness Estimates Between The Standard and Modified Mini. Mill™ The Standard Mini. Mill™ has an estimated Machine Stiffness of: 10 N/micron (57, 000 lbf/inch) This can be doubled by upgrading from short trucks (0. 02 C Preload) to Standard Trucks (0. 08 C Preload) The Modified Mini. Mill™ has an estimated Machine Stiffness of: 5 N/micron (27, 000 lbf/inch) The machine stiffness was estimated from the deflection due to the rolling of Y Carriage and Deflection of the Z Axis. See the Modified Mini. Mill™ Stiffness Presentation for the calculation of the its stiffness values Property of Roger Cortesi, MIT Precision Engineering Research Group. DO NOT COPY or TRANSMIT without written permission.
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