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Show"N"Tell ( Your Machines) / Re: CNC CONVERSION - 6" ATLAS LATHE
« on: September 02, 2009, 10:17:58 PM »
X AXIS BALL SCREW INSTALLATION
The x axis will receive a different ball screw as the carriage is rather limited in what it can provide for as shown in Figure 20. The carriage requires machining to open up the cavity such that the ball nut can travel inside the carriage. Sometimes post machining of a casting you remove internal stresses and the thing warps some. Hopefully this will not happen as the other surfaces of the carriage were already fine tuned for fit to the bed. Carbide end mills take care of cuttin thru the sand, stone and other crap in the casting.
Figure 21 show the carriage cavity ready to be machined. Set up is very important as there is not that much surplus material. You want the screw to travel parallel to the dovetailed ways in the carriage. You take you time. By the way before this is done details were drawn to see just what would be removed and how the trust and axial bearings would be mounted.
Figure 22 shows the completed machining with the ball screw laying in the cavity.
RICH
The x axis will receive a different ball screw as the carriage is rather limited in what it can provide for as shown in Figure 20. The carriage requires machining to open up the cavity such that the ball nut can travel inside the carriage. Sometimes post machining of a casting you remove internal stresses and the thing warps some. Hopefully this will not happen as the other surfaces of the carriage were already fine tuned for fit to the bed. Carbide end mills take care of cuttin thru the sand, stone and other crap in the casting.
Figure 21 show the carriage cavity ready to be machined. Set up is very important as there is not that much surplus material. You want the screw to travel parallel to the dovetailed ways in the carriage. You take you time. By the way before this is done details were drawn to see just what would be removed and how the trust and axial bearings would be mounted.
Figure 22 shows the completed machining with the ball screw laying in the cavity.
RICH