Setting up USB for the DBS-22

[micha]

This may not be a very innovative idea, but as I found it to be quite helpful, I thought I'd share that.

The template that comes with the DBS-22 is used to set the 14mm distance between the wheel and the USB.
Not a big deal, but it doesn't tell anything about the stone surface and the USB being parallel or not.

Thus I turned a simple cylinder, a little wider than the stone, with a 12mm bore and 14mm wall thickness for the distance.
In other words, 40mm diameter with a 12mm hole. Checking the setup in good light and from the right angle makes it quite easy to see the proper alignment of the USB.

Besides, and maybe even more useful, it's a great tool to quickly check the trueness of stones, if put on the top USB and simply turning the wheel while in contact with the cylinder. (Won't grind into the USB this way)

Mike

[RichColvin]

Mike,

That's a great idea.  I would like to add it to the Sharpening Handbook if you don't mind.

Kind regards,
Rich

[micha]

Rich,
of course I don't mind, it's an honour to contribute something to the great Sharpening Handbook! 
I'm glad you find it useful, too.
Sincerely,
Mike

[Ken S]

Interesting idea, Mike. Thanks for sharing.
Ken

[RichColvin]

Mike,
It is online.  https://sharpeninghandbook.info/indexJigs.html#DBS22USB
Let me know if I should update anything.
Kind regards,Rich

[micha]

Rich,

thanks for adding my humble idea.

It might be worth mentioning that the wall thickness of 14mm is not arbitrary, but equates to the USB-stone-distance usually set by the DBS template.

Kind regards,
Mike

[RichColvin]

Done

[Ken S]

Mike,
If your spacer was made with the length being the same as the very losable, but necessary, Tormek plastic spacer to keep the shaft in place when the grinding wheel is removed, it could do double duty.
Ken

[micha]

Ken,

I had thought about that for a short moment. But for checking the stone's flatness it's necessary to have at least 50mm for the T8.
The actual plastic spacer is around 45mm. (Remember that the stones are recessed where the EzyLock is.) That is why a 50mm spacer would leave very little of the thread accessible.
Mike

[RickKrung]

snip...
that is why a 50mm spacer would leave very little of the thread accessible.
Mike

Certainly true, but does the "gauge" actually need to span the entire width of the stone surface?  Can you not determine squareness with just a little less length? 

I use such a shop-made, aluminum spacer for my T8. It is 46mm long and looks to me to be quite functional in spanning enough of the stone surface but it looks to me as though there is enough thread available if one wanted to make it 50mm long.  I have a second inboard wheel spacer and with it on with the alum. spacer, the nut engages with 1/4 turn at 51.5mm length.  Enough to hold, but shortening the alum. spacer to 50 or 49mm would provide a little more comfortable engagement. 

Rick

[micha]

Hi Rick,

thanks for checking that. I had the same results, with about a quarter turn of the nut it looked a little strange, but admittedly it held firmly.

I still think covering the whole width of the stone is an advantage for checking the stone at a glance. (Sharpening bowl gouges can leave the surface in strange shapes.)When setting up the USB for the DBS-22 I have a better grip on the longer size.

But of course there are good reasons to make it shorter, if one prefers versatility.
Mike

[Ken S]

Mike,

Your idea of using a turned cylinder with the DBS-22 opens up lots of possibilities. I particularly like being able to easily check the trueness of the grinding wheel with it.

Another possibility which comes to mind is any Distance setting which is repeatable. This is especially useful with diamond or CBN wheels which do not change in diameter.

Good thinking, Mike!

Ken

[micha]

Thanks, Ken!
I've learned so much in this illustrious forum, I'm glad I can contribute to it. 
Mike

[Ken S]

Mike,
You are a valued member.
Ken