Thank's, I'll check bearing and arbour when I'm back at School, though when I stripped and cleaned around the arbour spindle and bearing everything looked in order. This is a very old well used School machine so one might suspect worn bearing's/arbour.
I've checked the blade with a diali ndicator and it's within tolerance and the kerf isn't wider than the blade.
The only other thing I could attribute it to would be the mitre slide, looks like it's had some work on it to ensure a good fit, unless the crude ground centre punch marks all along one side of the slide are normal ofcourse !. With it locked at 90 degrees and firmly in the slot, if I firmly hold it will move side to slide about 0.5 to 0.6mm if I apply pressure to eithier the left and right.
Over the Holidays I'll come back and find that the maintenance team have used it and abused it, even had to pick up the cross cut mitre slide off the floor before now !. Dont get me started with the planer thicknesser !, had to put a new set of blades on this term as someone decided to plane some old worktops with brass screws left in !.
We use TCT blades and thier all square and no tips missing yet the same problem occurs regardles of which blade I try. It would be nice if all I needed was a new blade for a quick fix, however thing's are never that simple !. Unless ofcourse all my blades are dull !.
HPC1290 User HPC 3020 Owner