Apologies for the confusion; my fault.
I was asking a question mechanism dynaimcs analysis, but thank you everyone for your help.
I didn't see a category for Mechanisms so I posted in Simulate with a tag of Mechanisms.
For future reference should I post Mechanisms quaetions in Parametric?
Question for Mats Lindqvist,
Do I need to constrain the block in either of the translation axes or just face to face? and to clarify "3-D contact" does not need to be used?
Cameron