Posts: 12,907
Threads: 0
Joined: Jan 2010
Location: Lewiston, NY
The wheels should stay in plane once you get them adjusted and tighten the nut holding the two halves of the frame together very tightly. If you have no riser block there should be locator pins between the two halves which align them correctly, so all you should have to do is really tighten the nut. I put a Powermatic riser block on my Delta and the locator pins didn't align properly so I ground them off. That actually allowed me to better adjust the wheels. Tightening the nut not only holds the two halves of the frame in alignment but also reduces flex when you tension the spring. I found that out the hard way. You want that nut really, really tight. By pre-tensioning the bolt you reduce the amount of strain it will experience when the spring is tensioned.
If you don't have a riser block you should be able to align the wheels just by adding/subtracting shims on the upper wheel. If the wheels are out of alignment from the left vs. right side, when you put a straight edge on them from top to bottom, then something else is wrong. I was able to rotate the upper frame member enough to bring them into alignment, because I ground the pins off. With those pins in place there must be another adjustment possible where the wheels are mounted to the upper and/or lower frame member.
It's worth the effort to get the wheels aligned. My saw would never cut straight or parallel with the miter slot until I finally got them aligned. Now with a sharp blade it's a pleasure to use.
John