Direct Drive vs. Idler Drive vs. Belt drive


I'd like to know your thoughts on the strengths and weaknesses of each drive system. I can see that direct drive is more in vogue over the last few years but is it superior to the other drive systems? I've had first-hand experiences with two out of the three drive systems but looking to learn more.
scar972

Showing 1 response by totem395

@richardkrebs 
 What, to me, is important is the speed accuracy at a micro level.
Can you comment on your statement above, if the drive is capable of micro speed stability would it not be able to maintain its 
speed or for that matter a stationary dot on a wall over a 1.8 sec
period?