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Hey,

thx for your helpful messages and input, and sorry for my long absence in this thread.

As advised, I contacted Tormek support which was a very, very exciting experience. Wolfgang took a lot of time and offered via mail and phone real good service!
(Now I know why I decided for the most expensive sharpening system on the market: service surely is worth that money compared to other poor experiences I had with other companies.)

Solution was, as presumed by simonh and by Wolfgang, to play with the two side-placed srews on the SE-77 jig, with which I brought it to a fairly good and repeatable result with SG 250-stone.
Not exactly understanding why the jig doesn't work in neutral position, I am happy (and pragmatic) enough to be satisfied for the moment.

Kind regards to Tormek community
Thomas

Hey folks,

here some photos to my post above.

Hi, Forum,

I still have problems to get consistent results using my T8.

Initial situation:

1) The stone is freshly prepared with the TT50. The surface is exactly perpendicular to the outer edge of the stone.
2) I fix the universal support carefully as described in Tormeks videos: soft touch above micro adjust screw, fixing this side first, later the other.
3) I also clamp the chisel into the jig as shown in the videos: aligned with the stop, the mirror side (hope, translation ist correct??) fits perfectly with the jigs surface. The device is set correctly, the screws on the left are tightened firmly, the "control strokes" on both parts of the device merge into each other.

Problem:

1) The stone is not worn out evenly.  There a stripe of about 6 or 7 milimeters on left side remains brighter. You can also see this when I move the clamped chisel on the stone from left to right side: the strip left by the EdgeMarker is getting stronger and stronger towards the right side of the stone.
2) The cutting edge of the chisel is therefore clearly crooked.
3) Yesterday, after long time and plenty of trials, T8 worked satisfying, 2 chisels became okay. Today: Nothing worked, several attempts, lot of time, result was a mess. Non- traceability of results drives me really crazy.

I have tried out a lot now:

1) I fix universal support again and again, trying slightly different pressure at slightly varying finger position.
2) loosened the stone and moved a quarter turn on the shaft.
3) I work carefully when grinding without pressure on the universal support so as not to get it out of parallel.

And now I can't explain to myself what's going on anymore.
The system CANNOT be so error-prone that such different results are given.

Could the machine have a blow away? It was delivered in damaged packaging, in addition, the protection of the shaft was slightly pressed in and the attached SJ 250 was damaged a little.

Or do you think there still is an error operating my T8?

Thank you for reading this long text, hope to get some Input here!

Greetings from Dusseldorf
Thomas