Mark Rios
08-28-2006, 1:08 PM
I'm starting to put my Unisaw back together (it's in 14 pieces right now) and after checking my table for flatness I noticed something strange.
When I first checked it, with the wings off but the main table still bolted to the cabinet, the table was dead flat (< .0015) on the diagonal, from my near left to the far right (standing on the infeed side). However, from my near right to the far left it had a dip with the lowest point at the insert cut-out. The dip was .017. I will assume that it was just bolted down out of the box and the original owner never checked it or adjusted it.
About an hour after I unbolted it and took it inside my house I checked it again and the dip was only .014. This was two days ago.
This morning I just checked it again and the dip is .009. The other diagonal direction is still dead flat.
Is the cast iron moving to flatten itself out? Does it have a memory? A memory that would last four years?
The table has a .005 dip at the insert cut-out when the straightedge is placed front to back. When the straightedge is placed side to side, it has a consistant dip from front to back of .003
What tolerences are acceptable?
Is there anything wrong at all?
I am using a 35" Snap-On precision straightedge (used for checking engine blocks and cylinder heads and such) and Snap-On feeler gauges.
Any info, help and/or advice is welcome and appreciated.
Thanks very much.
When I first checked it, with the wings off but the main table still bolted to the cabinet, the table was dead flat (< .0015) on the diagonal, from my near left to the far right (standing on the infeed side). However, from my near right to the far left it had a dip with the lowest point at the insert cut-out. The dip was .017. I will assume that it was just bolted down out of the box and the original owner never checked it or adjusted it.
About an hour after I unbolted it and took it inside my house I checked it again and the dip was only .014. This was two days ago.
This morning I just checked it again and the dip is .009. The other diagonal direction is still dead flat.
Is the cast iron moving to flatten itself out? Does it have a memory? A memory that would last four years?
The table has a .005 dip at the insert cut-out when the straightedge is placed front to back. When the straightedge is placed side to side, it has a consistant dip from front to back of .003
What tolerences are acceptable?
Is there anything wrong at all?
I am using a 35" Snap-On precision straightedge (used for checking engine blocks and cylinder heads and such) and Snap-On feeler gauges.
Any info, help and/or advice is welcome and appreciated.
Thanks very much.