I try to make it hang straight. the idea between making it hang at 15 degees is
to match the angle of the frame, but you aren’t hanging it in space from the top
when working, you are pulling on it from the sides.
if you have the ring be above the balance point (which is what you need to to to
have it tilt to 15 degrees), then in the top center where you are pulling on
both sides, a portion of your force becomes down force towards the workpiece.
Also, when you are near an edge, pulling above the center point makes it
slightly more likely to tilt off the edge, so you can’t go quite as close to the
what I did was set the ring high, then dug up a piece of angle iron and clampted
it to a table, then I hung the top bracket of the ring on the angle and moved it
forward and back until it hung straight. I then adjusted the ring to that
this doesn’t need to be perfect (which is why trying t make it hang at 15 degees
isn’t too bad), because the balance changes depending on what height the motor
is at (which can vary depending on the length of the bit for the same depth of
if it’s way off, then you can pull away from the workpiece at the top center
when the tension on the chains is the highest, or tilt/dig-in/drag more in other
it’s far more important to have the chains close to paralell than to have the
ring height correct, but if you are going to the trouble of adjusting things, I
advocate doing both at the same time.