I thought I’d clarify here a bit: I believe linear axes are supported quite well. I’ve got 3 setups myself that use linear axes, it’s not something that requires any really special configuration or planners (OMPL fi can cope with this just fine fi, and so can Descartes).
A turntable however is something I’m not sure about, but only because I’ve never configured such a system for use with ROS. Not necessarily because I don’t think it’s possible / supported right now.