Andy, Here's a more complete PDF that shows the spindle cover plate in relation to the new spindle motor and the large hole where the original motor used to be. http://www.autoartisans.com/mill/SpindleMountAssembly.pdf The spindle cover plate has holes for the eventual power draw bar.
and to put it into perspective, here's a photo of the original drive configuration with the huge 2HP single phase motor. You can see that the motor is raised even more and that cast iron plate is deep enough to provide enough thread for tightening down the motor after tensioning the belts. http://www.autoartisans.com/mill/MillDriveSection.jpg The top rectangular section that houses the pulleys and belts is actually a separate casting bolted and cleaned up with filler to make it look like one piece. There is no reason that I can't make a much shorter weldment that that holds just the two pulleys, spindle motor and power draw bar. The shorter Bergerda spindle motor means I now have headroom to build a spacer raising block between the column and the head to give me a bit more space over the rotary table and even a mount for a horizontal spindle drive. But first things first. LinuxCNC powered spindle. Draw bar and tool changer and then raising block. Then maybe think about updating how the motor and power draw bar are mounted. I don't know what I want yet so it's pretty hard to design. John > Not really. You could consider moving the adjuster plate to the other side > of the main plate to have less overhang on the motor shaft. > That would need a bigger hole in the main plate, making it weaker. But the > reduced moment load from the belt tension might make that an overall win. > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
