belt alignment

I have used this CNC Taig mill for 10 years. I would start having belt problems and realign and it would work.
Now I am having problems and it looks lined up to me, but the first thing happens is the belt twists and then it goes under a load and breaks.
Is there any info on a way to line this up besides eyeballing it?

Thanks,

I found some useful info on Google.

First check the motor support is square to the Headstock.
Next I use my Starrett #13 adjustable 4" sqaure to check alignment.
https://photos.imageevent.com/scl_el...rrett%2013.jpg

Place the body on the Headstock extrusion.
Now use the blade to check the belt alignment..

Stuart

Good Luck

thanks! that did the trick. my pulley was too low.