Squaring a parallelogram

[Alberto]

It seem I can't run out of questions :)

I have a piece of MDF with the form of a parallelogram (i.e. A four-sided plane figure with opposite sides parallel) whose corners at not square. I want to square it but because of its size I can't use the miter bar in the TS. I've tried attaching a strip perpendicular to one side with double sided tape and used that strip to run on the fence. However I'm not getting good results and with the tape is too difficult to adjust the strip. I though of building a carriage with some toggle clamps to attach and adjust the MDF but it seems like a lot of work for such a mundane task (i.e. squaring up a pice of MDF).
Is there an obvios solution that I'm missing?
Any suggestions?

Thanks,

Alberto//

[Ken (Ottawa Valley)]

You could clamp to one edge a straight board that is square to the adjacent edges and run a router with a straight-cutting bit down it then use that edge against your TS fence to square the opposite edge. Should take only a couple of minutes. If you don't have a router you could also use a circular saw, rip the opposite edge then re-saw the rough edge left by the circular saw.

Ken

[J.P.Rap Hamilton]

Sounds to me,like the perfect excuse to build a sled.It may be a bit of work but you'll have it there for the next time you need it.And belive me if you have ,you'll use it.
I built two sleds a while ago. One for 90 deg and one for 45 deg. I almost never use my miter fence any more.
J.P.

[Eagle SC]

Check to see if your table wings are parallel to the blade.If they are, clamp a piece of straight stock to the underside of the melamumine 90* to one of the long sides.Remove the fence from the saw.Use the outside of the tabletop as the fence.

[Russ Phelps St. Albert AB]

If it was me I'd clamp my straight edge to it and run my skill saw down the edge. No fuss,no muss and you get a square piece when your done.LOL Russ

[Marty Barron - St. John's]

Alberto, I agree with building a jig. A good example is the panel cutting jig that Norm uses on NYW for his sheet goods. It is piece of plywood with a hardwood lip that has runners attached to the plywood and rides in the mitre slots on your tablesaw. The runners have to parallel to your blade and the hardwood lip 90 degrees to the blade.

Hope this helps ...

Marty ..