I have a small machine with a 1.5kW water cooled spindle with an ER11 collet. I have been doing bit of engraving and have been struggling with ensuring that the material is absolutely flat on the sacrficial MDF substrate.

A bit of googling has revealed that there are devices called "nose cones" to overcome this problem. I cant find much more information than this though. I resume that they are some form of spring loaded device similair to drag engravers.

Can anybody cast any light on this subject.

Thanks