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Ken inspired me to think about the usage of TTS-100 for setting the edge angle of a tool mounted in the square edge jig SE-76. The results of my research shows that it is well possible.

First, mount the tool in the square edge jig with the protrusion 44 mm (1.73").

Second, set the position of the US using the inner hole (B) of the TTS-100.

Third, these two steps ensure the edge angle aproximately 25 degrees.

I have checked the edge angle setting with the angle master. I have got 25.5 degrees.
This setting should almost not depend on the grindstone diameter. 

Jan

In summer this year we have discussed the importance of pivoting the knife when sharpening its point. See http://forum.tormek.com/index.php?topic=2562.15 At this occasion I have introduced prototype of my tool's entitled Knife Tip Point Setting Template.

This template should allow easy knife mounting into SVM-45 knife jig, in a way that ensures the same bevel angle at the straight part of the blade and the point. Since that time I have slightly improved the concept and prepared a digital version of this template, which is now ready for your potential download.

In the picture below you can see my Knife Tip Point Setting Template designed for Ken's projection length 139 mm:



In the next picture, you can see that the knife jig is generally not placed equidistantly between the point of the knife and where the blade joins with the handle of the knife.



The improved design of the Knife Tip Point Setting Template is here:



The template can be  downloaded/printed  from the following address:
https://www.dropbox.com/s/xqwn5xuk0r07z5d/TEMPLATE_139MM.pdf?dl=1


Print the image at the actual original size and check that the projection length is really 139 mm.

Jan

P.S.: For info concerning Ken's projection length 139 mm concept see https://drive.google.com/file/d/0Bye-818SN85DdzB3bU9aUU81eTg/view?usp=sharing , and also the newer thread http://forum.tormek.com/index.php?topic=2639.0 .

Jimmy asked me for more pictures of my implementation of Wootz's "Homemade honing jig & cleaver support". http://forum.tormek.com/index.php?topic=2583.0

I decided to start a new thread for the new pictures and also for those previously posted.

Here are the images of my implementation of Wootz's jig. As you can see, I follow in his footsteps. I only replaced his wooden block carrying the auxiliary vertical sleeves by a steel profile. The dimensions of the steel profile are 1 3/8 " x 2 1/8 " x 6 3/8 ".

Into the front side of the profile I drilled four holes with a diameter of 4.2 mm (11/64 ") and provided them with M5 thread for screws which hold the auxiliary vertical sleeves (additional Tormek Horizontal Base) of this jig.



Into the back side of the profile I drilled two holes with a diameter of 12 mm (1/2 "). Two M12 threated rods of the length 6 1/2 " anchor the steel profile into the sleeves of the T7 Horizontal Base.



The jig works fine with long knives and also with wide cleavers, the one shown is 3" wide.





Jan

Recently I was using the Tool Rest SVD-110 and was surprised by its large locking force. In the handbook I have found the following picture and Tormek statement.



Since then, I wondered how this is possible. Here's my explanation, hopefully it is correct.

To increase the locking force F1 by 250% means to multiply it by a factor 3.5 (100% + 250% = 350%). The knob force F1 can be decomposed into two equal side locking forces F2. 



Because we require that 2 * F2 = 3.5 * F1 we can calculate the angle beta for which the equation is true:
sin (beta) = 0.5 * F1 / F2.

Putting those two equations together we get:  sin (beta) = 1 / 3.5

So, the angle beta = sin^-1 (1 / 3.5). Numerically beta = 16.6 deg.

So really, if the special wedge shaped bore of the Tool Rest touches the round bar of the universal support at an angle of 16.6 degrees, than the locking action is increased by 250%.

Jan

P.S.: Please, if you can, check my calculation.

Hi Everyone,

I need to sharpen an very old heavy duty mortise chisel with blade width some 18 mm (3/4") and blade height also some 18 mm (3/4"). Please advice how to sharpen this chisel with the Tormek system.

Jan