Q: How do I position a workpoint Tangent on a Cylinder (3511)

A:  You will  first need to place a workplane tangent to your cylinder. See MDT FAQ 2204 for this method. Once the workplane is placed, then place your workpoint on the workplane. Now you will need to dimension it so it is at  the location where the plane touches the cylinder. To do this,  use ampardim and select the point and then the top/bottom edge of the cylinder (see image below). Place the dimension towards the top and it dimensions from the circle's center to the workpoint. Enter a zero value and the point is now tangent. To position the point along the axis of the cylinder, repeat the same dimension picks as before but this time dimension to the right/left and enter value offset from the top/bottom.