Re: Question No. 1

Hi Jon, thanks for both the e-mail & the post, I don't know how I
missed the post reply, I,m going to be using steppers, open loop, so
I see now that a run away condition is unlikely to be due to a
hardware failure however a software problem (my own carelessness)
could lead to damage. Am I correct in assuming that apart from end of
travel, & a home switch, everything else can be taken care of by
software control? As I,m not looking for speed, but accuracy, there
will be a fair degree of reduction between motor & table, so this
makes your suggestion of motor mounted switch "anded" to a table
position home switch very attractive, thanks for the info, Ian
Sutherland.