What's causing my cuts to bend on mft/3 w/ ts 75?

[morogue]

I'm getting a bit of bend or wander in cuts at the ends of cross cuts (toward the guide) around .3mm  and tapering for an inch or so. These are longish cross cuts 22". It seems to be happening with plunge/retraction.

 

[Corwin]

I've experienced this in the past.  Some potential issues;

1, if this occurs on the MFT with the guide rail installed on the brackets, the rail may be distorted where it is attach to the hinged bracket.  This can be the case if your material is rather close to that bracket.  Another similar issue that could occur at that same location is that you have set that hinged bracket slight too low -- lower than your material.  Allowing for more room between the end of your cut and that rear bracket may eliminate this problem.

2, If your reach is overextended at that far end of the cut, you may be introducing a slight twist on the saw at the far end making that portion of the cut off.

3, If you stop your cut when the front of the blade clears rather than continuing past until the rear of the blade clears, your cut may be off since the toe-in attitude of these saws also means that the rear of the blade will still trim a slight amount on the right side of the cut.

Not really sure about any of the above suggestions...  But this is some food for thought and a start for others to comment on.

 

[tigger]

I've experienced this in the past.  Some potential issues;

1, if this occurs on the MFT with the guide rail installed on the brackets, the rail may be distorted where it is attach to the hinged bracket.   This can be the case if your material is rather close to that bracket.  Another similar issue that could occur at that same location is that you have set that hinged bracket slight too low -- lower than your material.  Allowing for more room between the end of your cut and that rear bracket may eliminate this problem.

2, If your reach is overextended at that far end of the cut, you may be introducing a slight twist on the saw at the far end making that portion of the cut off.

3, If you stop your cut when the front of the blade clears rather than continuing past until the rear of the blade clears, your cut may be off since the toe-in attitude of these saws also means that the rear of the blade will still trim a slight amount on the right side of the cut.

Not really sure about any of the above suggestions...  But this is some food for thought and a start for others to comment on.

I agree, it does sound like your setup could be the problem. Personally, the toe-in factor seems to be the most common error I've found when chatting to my carpentry buddies.