Problem with Grizzly DP

I have a new Grizzly DP. Suddenly, I cant lock the spindle in the down position any more. When turning the depth ring clockwise, it used to stop at the top position, then I could tighten the screw and the spindle would stay put. Now the depth ring just spins and spins without "catching". Anyone know what the problem is?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Site Timeline is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.