On Oct 16, 5:02*pm, "Dave Liquorice"
wrote:
On Fri, 16 Oct 2009 16:56:55 +0100, Stephen Mawson wrote:
Secondly, I wonder whether there might be a lack of lubrication in the
motor/gearbox, grease having gone stiff etc.

Possibly but I'd look at lack of lubrication of the whole system
runners, hinges between segments etc. It drops OK 'cause it has
gravity to assist but opening it has to over come gravity and all the
little losses in bending and sliding bits against each other.


Clean everything out rather than lube it. Lube should normally only be
used in the motor bearings and gearbox, if you lube oen external stuff
it will only collect muck and get stiff quickly.


NT