Quote Originally Posted by wiatroda View Post
eg belt 3M pitch belt driven with 15 tooth pulley gives you 45 mm of axis movement per revolution of driving pulley.
My experience is 15T is too small for a machine this size.! Problem being the number of teeth in mesh is on the lower safe limit. It will work ok but the belt wears prematurely.
Obviously a plotter has very little work to do so the load is light meaning it won't be so much a problem but if it was to be used for cutting wood etc the force's will eventually tell there toll.
IMO for the sake of few more quid, and it literally will be £1 or £2 per pulley, and seen as gearing is required either way then it's just not worth not doing.!