Terrezar
Elite Cafe Member
Beeing a beginner in the engraving trade I tend to experimente a lot, and because the reasent fuss about heels and faces and sharpening I started to experimet a little with heels. I failed completly when trying to engrave whit a long heel, and when trying whit a "bendt" heel and so I wanted to try out a parallel heel, for a change. The only problem, however, was the fact that I use a GRS dual angle fixture to sharpen, a system that usualy produced "regular" heels.I spendt a lot of time thinking about this, and afther a little while started to see a pattern in the geometry.
Anyone can understand that to make a parallel heel in the GRS fixture one musst tilt the graver a few extra degrees when making the heel. However, the main problem here is that the amount of degrees one has to add changes depending on how steep a heel you usualy use.
Luckely for all of us there is a pattern. I have taken the liberty of working out the patterns for the most common gravers, and listing them here.
For a 60 degree graver, tilt 1,73 degree for every 2 degree of your heel.
For a 75 graver, tilt 1,3 degree for every 2 degree of your heel.
For a 90 degree graver, tilt 1 degree for every 2 degree of your heel.
For a 105 graver, tilt 0,76 degree for every 2 degree of your heel.
For a 120 degree graver, tilt 0,57 degree for every 2 degree of your heel.
Keep in mind that all of the abowe geometries are calculated for a face of 45 degrees.
The last decimal is not all that important, I think, but I put them up here anyway.
To give an example, if I have a 90 degree graver with a 10 degree heel I will have to set the fixture to 50 degrees when making the heel instead of 45.
Hope you find it useful, and if you have any strange geometries, I'm sure I can work that out too.
The reason I'm not posting the way to work it out is simpely because I'm not quite sure about how to explane it whitout making a lot of work out of it.
In time I'll try to figure out something for other faces as well, but as I only use 45 degrees I didn't bother with that now.
Hope you find it useful
Anyone can understand that to make a parallel heel in the GRS fixture one musst tilt the graver a few extra degrees when making the heel. However, the main problem here is that the amount of degrees one has to add changes depending on how steep a heel you usualy use.
Luckely for all of us there is a pattern. I have taken the liberty of working out the patterns for the most common gravers, and listing them here.
For a 60 degree graver, tilt 1,73 degree for every 2 degree of your heel.
For a 75 graver, tilt 1,3 degree for every 2 degree of your heel.
For a 90 degree graver, tilt 1 degree for every 2 degree of your heel.
For a 105 graver, tilt 0,76 degree for every 2 degree of your heel.
For a 120 degree graver, tilt 0,57 degree for every 2 degree of your heel.
Keep in mind that all of the abowe geometries are calculated for a face of 45 degrees.
The last decimal is not all that important, I think, but I put them up here anyway.
To give an example, if I have a 90 degree graver with a 10 degree heel I will have to set the fixture to 50 degrees when making the heel instead of 45.
Hope you find it useful, and if you have any strange geometries, I'm sure I can work that out too.
The reason I'm not posting the way to work it out is simpely because I'm not quite sure about how to explane it whitout making a lot of work out of it.
In time I'll try to figure out something for other faces as well, but as I only use 45 degrees I didn't bother with that now.
Hope you find it useful