Brad Ridgway
02-12-2009, 7:57 AM
Ok, maybe i'm an idiot, but since i upgraded my GI contractor to a used (1999) PM66, i feel i'm struggling with accuracy...
1) The top is definitely not flat. If i throw a straightedge front to back i can see nearly 1/16" of light on both ends. I also have problems with the left most extension wing in particular where no matter what i can't get it perfectly in sync with the top.
2) i have used my TS Aligner JR to try to get everything set as tight as possible (including the back of the fence being ~.003) out further from the miter slot than the front. Yet even when ripping, i am getting horrible results.. the width of the board is inconsistent throughout the cut (and this is using board buddies to pull it tight against the fence). The out of flat top shouldn't cause what i'm seeing here - and though the fence isn't perfectly flat, i don't think it could cause what i see here either.
I'm not sure where to start... don't get me wrong, i know it's a good machine or wouldn't have upgraded, but in a couple of hours i was able to tweak the general to perfection and just can't seem to get there with the PM.
Any tips? Do i find someone to grind the top for starters? Shipping would be a nightmare so is there a certain type of shop i could look for locally (central florida)
thx in advance...
-brad
1) The top is definitely not flat. If i throw a straightedge front to back i can see nearly 1/16" of light on both ends. I also have problems with the left most extension wing in particular where no matter what i can't get it perfectly in sync with the top.
2) i have used my TS Aligner JR to try to get everything set as tight as possible (including the back of the fence being ~.003) out further from the miter slot than the front. Yet even when ripping, i am getting horrible results.. the width of the board is inconsistent throughout the cut (and this is using board buddies to pull it tight against the fence). The out of flat top shouldn't cause what i'm seeing here - and though the fence isn't perfectly flat, i don't think it could cause what i see here either.
I'm not sure where to start... don't get me wrong, i know it's a good machine or wouldn't have upgraded, but in a couple of hours i was able to tweak the general to perfection and just can't seem to get there with the PM.
Any tips? Do i find someone to grind the top for starters? Shipping would be a nightmare so is there a certain type of shop i could look for locally (central florida)
thx in advance...
-brad