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It is fine with the two datum lines offset by about 1.5mm - nice 90 degrees; or hardly any gap between a square and the edge after a grind. Maybe I'll just have to put up with it. But it is not really satisfactory, and candidly is a retrograde step as compared with the SE76 that just did 90 degree grinds (if you used it right!) - which lets face it what 99% of what you want to do with chisels and plane blades, unless it purposely has a skew (like a LN 140 skew block plane; but that is 18 degrees, and I think is beyond the SE77)

I've twice tried to get a response from Tormek about this datum offset, but so far nothing.

Craig

OK - 52.4 at one side of the stone and 52.6 at the other. Those measurements to a sharpie line on the stone drawn at right angles to the outer face of the stone (after checking that the face and edge were at 90 degrees).

So I think we can discount a lack of accuracy in the support bar at working distance referred to the stone.

Craig

Hi Mike

I'll do a check with calipers that the distance tracks with the support bar in the right position for grinding

Good suggestion!

Craig

I'm coming in late to a moribund thread. But I too am fighting the SE77. I'm a seasoned Tormek user, and had no problems with the SE76. I foolishly sold that before I tried the SE77.

The problem is that with the datum marks aligned, a grind is noticeably out of true 90 degrees.

Now I've very recently fitted a new shaft, nylon bearings and grindstone to my T7, and have verified from the support bar that the stone is flat and true to better than 1.5 thou (40 microns) referred to the bar itself.

Checking with a plane iron that is true 90 degrees with a Moore&Wright square, with the edge painted with a sharpie, I can only transfer sharpie to the stone with the SE77 datum lines misaligned by 1.5mm.

That seems to be a very large error. Anyone else have that problem with an SE77?

Of course I'm kicking myself for selling by trusty SE76 *before* I tried out the SE77.

Craig