I have developed a method for simple adjustment of the grinding angle with the knife jigs SVM-45 and SVM-140.
Coarse adjustment is done by setting the distance of the universal support to the stone in steps of 5mm.
The fine adjustment is done with the adjustable stop of the knife jig.
The required adjustments for a certain grinding angle are listed in tables.
Tables are made for stone diameters from 240-180mm, in steps of 10mm
The method is documented in PDF-files which can be downloaded from Dropbox:
https://www.dropbox.com/sh/zfzeuyyhors8oid/Yyq5S71LxR
• "Grinding angle adjustment Booklet.pdf" should be printed two-sided on A4 paper.
You can then staple and fold it as an A5-booklet. It should also fit on 'US legal' size.
• "Grinding angle adjustment A5 serial.pdf" , is the A5 serial version, for storing in iBooks on iPad.
This document is also attached at the end of this message
20180702
At the request of "cbwx34" I developed mathematics for use with its robust "jig-fix" as published on https://forum.tormek.com/index.php?topic=3570.msg22912#msg22912
The new formulas can also be used to choose a different reference point for the distances than the center of the jig's stem, which is unclear and inconvenient.
As a result, the setting of the sharpening angle can be determined more accurately.
Some measurements were also made from which possible sources of error appeared.
The new document is titled "More math for the Tormek grinder"
You will find the documents in the public folder "Tormek-T7 grinder":
https://bit.ly/2lHaR3m on DropBox
https://bit.ly/2KpROFg on OneDrive
The new documents are:
• "More math for the Tormek grinder A5 serial.pdf", serial version for tablet
• "More math for the Tormek grinder booklet.pdf", A5 booklet to print on A4
This document is also attached at the end of this message
• "USB adjustment table.ods", spreadsheet to generate the new table
20221021
New tables, useful for Knife Jig KJ-45
With the new Self-centering Knife Jig KJ-45, the projection distance can no longer be adjusted, due to the lack of the adjustable stop. My tables, however, were based on coarse adjustment with the USB and fine adjustment with the adjustable stop. These are therefore no longer usable with the KJ-45.
Forum member Perra has created a spreadsheet to generate other tables useful for the KJ-45.
See https://forum.tormek.com/index.php/topic,4885.msg37010.html#msg37010
You measure the projection-distance (between stop and knife edge) and the table gives you then the correct USB distance to the stone for a certain grinding angle.
The stone diameter is one of the parameters to be set
20221031
cbwx34 added the link of available calculators: Knife Sharpening Calculators
20230505
Benjamin Hung "benhung" has made a graphical representation of the relationship between the various parameters. This will give you a good understanding of how it works. The values of the set parameters are displayed and can therefore also be used as a calculator for the grinding angle.
You will find the message on:
https://forum.tormek.com/index.php/topic,5254.msg38240.html#msg38240
and the graphics on
https://www.geogebra.org/m/wwuqbvhh
Finally, Benjamin has posted an extensive and amusing explanation in this topic at https://forum.tormek.com/index.php/topic,1849.msg38339.html#msg38339
20221025
Attached documents
Coarse adjustment is done by setting the distance of the universal support to the stone in steps of 5mm.
The fine adjustment is done with the adjustable stop of the knife jig.
The required adjustments for a certain grinding angle are listed in tables.
Tables are made for stone diameters from 240-180mm, in steps of 10mm
The method is documented in PDF-files which can be downloaded from Dropbox:
https://www.dropbox.com/sh/zfzeuyyhors8oid/Yyq5S71LxR
• "Grinding angle adjustment Booklet.pdf" should be printed two-sided on A4 paper.
You can then staple and fold it as an A5-booklet. It should also fit on 'US legal' size.
• "Grinding angle adjustment A5 serial.pdf" , is the A5 serial version, for storing in iBooks on iPad.
This document is also attached at the end of this message
20180702
At the request of "cbwx34" I developed mathematics for use with its robust "jig-fix" as published on https://forum.tormek.com/index.php?topic=3570.msg22912#msg22912
The new formulas can also be used to choose a different reference point for the distances than the center of the jig's stem, which is unclear and inconvenient.
As a result, the setting of the sharpening angle can be determined more accurately.
Some measurements were also made from which possible sources of error appeared.
The new document is titled "More math for the Tormek grinder"
You will find the documents in the public folder "Tormek-T7 grinder":
https://bit.ly/2lHaR3m on DropBox
https://bit.ly/2KpROFg on OneDrive
The new documents are:
• "More math for the Tormek grinder A5 serial.pdf", serial version for tablet
• "More math for the Tormek grinder booklet.pdf", A5 booklet to print on A4
This document is also attached at the end of this message
• "USB adjustment table.ods", spreadsheet to generate the new table
20221021
New tables, useful for Knife Jig KJ-45
With the new Self-centering Knife Jig KJ-45, the projection distance can no longer be adjusted, due to the lack of the adjustable stop. My tables, however, were based on coarse adjustment with the USB and fine adjustment with the adjustable stop. These are therefore no longer usable with the KJ-45.
Forum member Perra has created a spreadsheet to generate other tables useful for the KJ-45.
See https://forum.tormek.com/index.php/topic,4885.msg37010.html#msg37010
You measure the projection-distance (between stop and knife edge) and the table gives you then the correct USB distance to the stone for a certain grinding angle.
The stone diameter is one of the parameters to be set
20221031
cbwx34 added the link of available calculators: Knife Sharpening Calculators
20230505
Benjamin Hung "benhung" has made a graphical representation of the relationship between the various parameters. This will give you a good understanding of how it works. The values of the set parameters are displayed and can therefore also be used as a calculator for the grinding angle.
You will find the message on:
https://forum.tormek.com/index.php/topic,5254.msg38240.html#msg38240
and the graphics on
https://www.geogebra.org/m/wwuqbvhh
Finally, Benjamin has posted an extensive and amusing explanation in this topic at https://forum.tormek.com/index.php/topic,1849.msg38339.html#msg38339
20221025
Attached documents