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Select edge Place here Add leader 14. Adding a Flatness tolerance: The geometric tolerance symbol adds geometric tolerances to parts and drawings using feature control frames. The SOLIDWORKS software supports the ASME Y14.5- 2009 Geometric and True Position Tolerancing guidelines. Click the Geometric Tolerance command. Select the vertical edge as noted and then move upward to align it next to Datum A. Select Flatness from the list. Enter. 003 for Tolerance. Click Done and OK.
15. Adding a Perpendicular tolerance: Perpendicularity in GD&T can mean two different things depending which reference feature is called out. The normal form or Surface Perpendicularity is a tolerance that controls Perpendicularity between two 90° surfaces , or features. Surface Perpendicularity is controlled with two parallel planes acting as its tolerance zone. Axis Perpendicularity is a tolerance that controls how perpendicular a specific axis needs to be to a datum. Axis Perpendicularity is controlled by a cylinder around a theoretically perfect parallel axis. Select the diameter dimension of the hole (circled). Click the Geometric Tolerance command. Select the Perpendicular symbol from the list. Enter Ø.003 for Tolerance. Click the Material Condition and select the symbol. Enter A for Primary Datum. The Perpendicular control frame. Click OK. M
Double-click the Perpendicular symbol to modify it 17. Modifying the geometric tolerance: For the counter bore feature we will change the symbol to Position, or also called True Position. True position in terms of the axis, point, or plane defines how much variation a feature can have from a specified exact true location. Double-click the control frame of the counterbore hole. Change the symbol to Position (arrow). Leave the other references at the same values. Click OK.
18. Adding another Position tolerance: Zoom in on the Back view and locate the small hole on the lower right corner. Select the dimension 4X Ø.125 and click the Geometric Tolerance command. Create a True Position tolerance that looks like the one shown below. Be sure to attach the control frame to the hole dimension (circled). Click OK. For practice purposes, we will create some other tolerances such as Symmetric, Bilateral, Limit, Basic, etc., in the next few steps.
