Correct squareness of boring table and guide rail with common square ruler

In the vertical lathe or boring machine installation adjustment process, the verticality of the moving rail and the workbench needs to be adjusted, which requires a square or square box with high precision (its accuracy level is at least one higher than the equipment requirement). Of course, the squareness error is preferably 0. If it is not 0, the squareness error must be known. However, squares with verticality errors of 0 or close to zero are difficult to find, which causes a lot of trouble for the adjustment equipment. For example, the following method can also be used to correct the equipment by using an ordinary square ruler.

Basic principle: (As shown in the drawing): Let AOB be a workbench, CO be a machine tool guide, DEF be a square, L and P be two straight lines parallel to the worktable: Assuming that the workbench is perpendicular to the guide rail, then, The difference between the offset of one side EF of the square placed on the worktable with respect to the guide rail should be equal to the difference in its position symmetrical to the CO, and vice versa. Based on this conclusion, the squareness of the table and the guide rail can be calibrated by the ordinary square ruler, and the square ruler can also be corrected by the guide rail and the table.
In practical application, a dial indicator can be mounted on the main shaft of the trampoline, and the square can be placed on the table as shown in the figure, and the main shaft can be moved up and down to obtain the difference in the offset amount in the fixed length section, and then the square can be placed thereon. Symmetrical position, move the spindle, find the offset of the spindle guide rail with respect to the same side of the square, and adjust the verticality between the table and the guide rail. .
Using this method to adjust the trampoline TX6213 and vertical lathe CQ5240B, the effect is very good.