- Oct 16, 2012
- Reaction score
Question: Does that condition exist with a substantial depth of cut or only on light finish cuts?I have an Enco lathe that is giving me a weird wavy pattern when I face a piece of bronze bushing stock.
I have tried different spindle speeds, feed speeds and cutters.
It almost seems like the pattern follows the turning of the cross screw, even though I have snugged up the gibbs tight and locked down the compound slide.
I just installed the new tool post, but it seems quite rigid.
Any suggestions as to what is causing this and how to fix it?
Does it have to do anything to do with the bronze material?
View attachment 108810 View attachment 108809
Put a known to be straight edge such as the ruler out of a combination square in the chuck and tighten the chuck just enough to maintain the ruler. Level the ruler and then dial indicate the ruler edge using the cross slide. Chances are you will have discovered your problem before you have the ruler dial indicated parallel with the cross slide. If that does not replicate the condition that is effecting the surface finish then you need to be checking the thrust clearance on the spindle bearings.