Guys
I found this useful PDF on the Delta Line web site whilst doing a bit of background reading on linear stepper actuators etc.
Thought you might want to preserve a copy if they decide to change their minds.
It's sort of a condensed how to size your motor in terms of force type thing.
[
www.deltaline-europe.com]
and select their link to their technical doc's
[
www.deltaline-europe.com]
It is rather confusingly called "Tin Can & DLA"
aka47