KMG rotary platen attchment

I bought one recently but haven't really had time to get to know it yet. I'm thinking I need to tighten the tension a bit more. And like someone else said, the plunge lines are a bit of a puzzlement if you've already flat ground the piece. I think I need to just use it a few more times to really get the hang of it.
 
Peter Atwood said:
I bought one recently but haven't really had time to get to know it yet. I'm thinking I need to tighten the tension a bit more. And like someone else said, the plunge lines are a bit of a puzzlement if you've already flat ground the piece. I think I need to just use it a few more times to really get the hang of it.
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Peter....what I do is make sure my flat grind is still pretty thick....this leaves me more room to work with the rotary platen. You can actually rock the shoulder a bit into to edge of the belt to clean up the plunge line and get it to flow with the rest of the grind lines....just make sure you are using the stiffest setting and let the belt roll over the edge of the platen a bit. If you try this on a flat platen you would make an unrecoverable error.
 
Razorback - Knives said:
Betcha I get one before you Burch.:p :D
Scott
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I can try putting one down on my "wish list," but I have the feeling I haven't been good enough for that nice a gift. :D
 
I have had "ROBS FIRST ONE" for a long time.
I love it.

Thanks also to KEN ONION who invented it and gave it to Rob.

S7 is a very unique steel.
Try some of the p series somtime.
It has some quirks to it for sure!
 
Darrel Ralph said:
Thanks also to KEN ONION who invented it and gave it to Rob.
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That's something I've been thinking about: I hope it's patented. I'm no fan of the US Patent Office, they seem to have lost the concept of what patents are for but in this case I think the rotary platen is appropriate for a patent.
 
Dave
If I remember right Ken gave the platen to anyone who wanted it....... I think. That's why Rob persued it.

There is a thread from years ago. Look it up.

To patent it Ken would have had to done it before that point.

It is a great idea and would have stuck it think in the patent office.
Enough sales to support the patent could have been a issue maybe?

Happy Thanksgiving
 
Peter Atwood said:
I bought one recently but haven't really had time to get to know it yet. I'm thinking I need to tighten the tension a bit more. And like someone else said, the plunge lines are a bit of a puzzlement if you've already flat ground the piece. I think I need to just use it a few more times to really get the hang of it.
Click to expand...


I have had a rotary platen for almost 2 years now. The first year I didnt use it much as I just couldnt get the plunge cuts right.....after a lot of experimenting, I found what works for me.

I go straight into the convex grind.......using the smallest platen distance between the rollers and make sure the belt is nice and tight.... a new sharp 36grit to cut the plunge cuts ..and apply light pressure...works for me anyway.
 
Darrell and Ken, that is very very cool. That's the same concept that open source software developers use - they make their work free to anyone and others build on it. The very opposite of patenting anything, and the result is hugely powerful and advanced software. That kind of thinking is going to change the world - it's already rocking established proprietary software makers on their heels and making them begin to cooperate with the world rather than trying to own it.

This is the sort of openess that I so appreciate in the our community, and I'm sure the reason that our ranks and the skills and achievements of makers has grown to such a fantastic degree. We're living in a renaissance of the blade maker's art and it's a wonderful thing. Folks like Ken are the foundation for everything the rest of us do. And the world is a richer place for it.

The rotary platen is such a unique and valuable tool that I don't think we've even begun to learn how it will influence our craft. (I wouldn't trade mine for ten years with Uma Thurman. Well, maybe I'd give it up if I could replace it when the decade was done... I'd be too busy and way too tired during that time to use it anyway. ;))
 
I need one bad.....really bad....someday, when I've been good...maybe as good as Burch and Scott....:p
 
Kit,

how do you make such a smooth transition from ricasso to blade?
Looks really nice.


Kit Carson said:
Rob,
Don't lead em on. You're a nice guy, even at the Blade show.

Scott,
Let me catch a couple of questions in this thread. S7 make a decent chopper and is great for wood turning tools. Here are a couple of big blade from it, done on the rotary platen.
Click to expand...
 
Dave,
It was a grand jesture for Ken O to give this gift to the knife industry.

Your concept is very correct IMHO. The makers who are not afraid of there work and give instead of take are the true winners in the long term just like the software developers that you speak about. :thumbup:

We all have items we like to keep on are knives as our brand styles ect. But some things are for the good of all.
It is good to see that others can see this also.;)
 
Just wondering...

if you use the stiffest setting on rotary attachment does blade comeout "almost" flat grind?

Thanks,
Alex
 
Judging by the pictures I've seen on Rob's website it appears that this would easily work on a Square Wheel, too... but I saw no mention of it. Is the stock used for the actual assembly too thick to allow the belt to ride in the right location for this grinder, or has anyone managed to use it on this?
 
alexmin said:
Just wondering...

if you use the stiffest setting on rotary attachment does blade comeout "almost" flat grind?

Thanks,
Alex
Click to expand...
Alex, what has worked for me to get the "flatest" convex grind is light pressure with a new belt. Took me a long time to enforce the practice because I'm so tuned to heavy stock removal. :D But finese is rewarded! I still have not cranked the tension as high as I believe some folks have, just treating my fine tool with kid gloves... :) But that's just me.
 
Finally, I'll be ordering mine the end of this week.:D
Scott
 
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