Hi Rob
Thank you for your prompt answer.
I am certainly new to the forum, but I practice the sharpening of my woodturning tools since several years with TORMEK machines.
Considering this I can humbly pretend to master the TORMEK principles and settings, especially for the sharpening of bowl gouges with the SVD-186 jig.
You remind me of the 3 variables to be adjusted :
- "jig setting (0 to 6)"
- "hole A or hole B"
- "protrusion of the tool" (55 , 65 , 75 mm)
I know thoses settins well and practice them every day, thank you anyway for taking the trouble to remind me that.
Unneeded also to tout the benefits and high qualities of the TORMEK products, I'm convinced and very satisfied with their system.
But my questionning about the graph in the manual persists and I'm still in search of a satisfactory answer .
Let's consider a single row, by example the 4th :
- the tool protrusion is set to 65mm
- the jig setting is set to JS3
- the hole used is A
With thoses 3 variables settled in this way How then is it possible to obtain such several edge angles as 35° , 45°, 55° and 75° ?
It is in conflict with saying that the 3 adjustments are sufficient to determinate a profile and only one.
Thank you for taking the time to carefully consider my questioning ... with the manual in one hand and the SVD jig in the other hand

Still waiting for a rational approach and explanation of this graph.
JR Dubuy