Moving along a curve - constraints to keep normal?

[daveykbelgium]

Hello Gurus

Part of the previous exercise was moving along a composite curve.

I moved a point with a servo, but making what was on the point move at a normal to the curve was a pain – I did it in the end using a couple of followers like chain links, attached behind the point using similar slot constraints.

There must be an easier way surely – any ideas?

Thanks in advance

Dave