Shims came loose

[cork58]

I made some Dado cuts last night just before quitting for the day. Came back this morning and put the crosscut blade back on and made a test cut just to make sure it was straight. It wasn't so I made the adjustments and couldn't get the same cut everytime. After a few minutes I found the shims on the outside were loose. Got my trusty allen wrench and found that both were about 2 full turns out before contacting the shims.

I checked the Dados and found the first 2 were good, then the cuts got worse till they were off by about 1/16 over 3". That is ofcourse the same I found this morning. I'm back on line again but my question is, why did the screws back off. I just cut Dados last week and do so about every week. Why just all of a sudden would both screws back off. Not hot on Locktite but if it does it agin I'll lock them in.

[Black wallnut]

Are you sure the shims are still in place? If they are and the tabs are still good you should use some low strength lock-tite.

housekeeping note: I've moved this to BT3X00 Related Discussions.