Tools/metallathe/DRO: Difference between revisions

 

=== Setting and using the length scale ===

Working to a Shoulder face off the front of your Stock and without moving your Saddle Traverse Wheel; Zero the Y button to the right of the corresponding readout display. Then use the method discussed in Turning a Diameter to set the X value. Feed just short of the desired length on successive cuts leaving material for your final shoulder face. Check the diameter when you are close to your finished size. Make your final pass and Go to your finished Y dimension to then create your finished shoulder. Parting Off to a given length using the same method of either facing off and zeroing the Y button or if the face is already cut employ the following technique. Find an accurately ground piece of material such a square tool stock or a rule as an edge-finder aid; place this against the face of the work-piece. Bring the Parting tool alongside the edge-finder and rotate up and down whilst maintaining full contact with the end of the stock and using the compound slide to bring the right hand side of cutting edge of the Parting tool so that the edge-finder just rubs against it without being deflected. (This may need to be repeated a few times before you master it). When satisfied, set your Y readout to zero. Move the carriage to the desired length and part off. If you intend to reverse the work-piece in the chuck you could allow a small amount extra so you can then face off a portion to get to your finished length.