You can set the bevel angle with either the Distance from the grinding wheel to the support bar OR the Projection. Usually with chisels we control the setting by changing the Distance with the Microadjust.
Using my method with the TTS-100 automates both of these settings. Using the hole in the TTS-100 standardizes the Distance setting. The two metal wheels automatically compensate for differences in grinding wheel diameter.
Marking one of the slots in the TTS-100 for 25° Projection (or whatever angle you desire) is just a convenient way to do this. As you note, there are other easy ways to do this. Wooden stop blocks are a typical choice which work well.
Try it. Set the Distance using the TTS-100. If you prefer, use a stop block to set the Projection. You may have to do some trial and error fine tuning for the initial chisel. After that, everything is automated.
Ken
Using my method with the TTS-100 automates both of these settings. Using the hole in the TTS-100 standardizes the Distance setting. The two metal wheels automatically compensate for differences in grinding wheel diameter.
Marking one of the slots in the TTS-100 for 25° Projection (or whatever angle you desire) is just a convenient way to do this. As you note, there are other easy ways to do this. Wooden stop blocks are a typical choice which work well.
Try it. Set the Distance using the TTS-100. If you prefer, use a stop block to set the Projection. You may have to do some trial and error fine tuning for the initial chisel. After that, everything is automated.
Ken