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PostPosted: Fri Feb 09, 2018 8:26 am 
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Cocobolo
Cocobolo

Joined: Fri Jan 15, 2016 9:04 pm
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First name: Andy
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bcombs510 wrote:
The optivisor is a nice touch.

It's what us old folk use when working up close.

Woodie from the looks of the fretboard patch, that's a 42 or 45 style guitar going together? Are you holding back on us?

Andy


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PostPosted: Sun Feb 18, 2018 8:50 pm 
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Brazilian Rosewood
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Joined: Thu Feb 12, 2009 10:27 pm
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Location: South Carolina
First name: John
Last Name: Cox
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Ok.. So to circle back around on this topic....

This appears to primarily be a chisel setup thing.. Specifically - once I hit a 30 degree microbevel - the problems basically went away unless the chisel was Mush.. Chisels still nominally have to be good - but I am not having catastrophic edge issues on everything.

So here's what I learned:
3 things for end grain spruce.
Decent chisels. Good chisels should get you fine grained steel, proper alloy and carbon content, and proper heat treatment.

30 degree microbevel. This seemed to be the magic threshold. Below this - all chisels were consistently having edge trouble....

Super sharp.


Last edited by truckjohn on Sun Feb 18, 2018 11:38 pm, edited 1 time in total.


These users thanked the author truckjohn for the post (total 2): Clay S. (Mon Feb 19, 2018 9:32 am) • Pmaj7 (Sun Feb 18, 2018 11:42 pm)
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PostPosted: Sun Feb 18, 2018 9:22 pm 
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Koa
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Joined: Sat Jan 19, 2013 7:33 am
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First name: Willard
Last Name: Guthrie
City: Cumberland
State: Maryland 21502
Zip/Postal Code: 21502
Country: United State
Focus: Repair
Status: Semi-pro
AndyB wrote:
bcombs510 wrote:
The optivisor is a nice touch.

It's what us old folk use when working up close.

Woodie from the looks of the fretboard patch, that's a 42 or 45 style guitar going together? Are you holding back on us?

Andy


There are two 12 fret dreadnaughts and one 12 fret Auditorium/000 under construction in the shop with Style 42 trim. That was the 000 - the last to be bound.

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PostPosted: Mon Feb 19, 2018 2:26 pm 
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Cocobolo
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Joined: Mon Oct 31, 2011 8:50 pm
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First name: Bob
Last Name: Howell
City: Atlanta
State: Ga
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Status: Amateur
I will repeat the advice for lower sharpening angle; like even 20-23% for soft spruce. Carving knives can go as low as 20-% and stropping is used between sharpening.

I go 35% when cutting mortises in hard wood.


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PostPosted: Mon Feb 19, 2018 2:32 pm 
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Cocobolo
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Joined: Fri Jan 15, 2016 9:04 pm
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First name: Andy
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Not having a wicked sharp final product will cause the same results - the thought that one needs a different angle to fight a quickly ineffective tool (that started as a somewhat effective tool). Make sure one is able to get a very sharp edge on the chisel - goes a long way to having longer serviceability between blade touch-ups.

Sharp fixes most problems.

Andy


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PostPosted: Mon Feb 19, 2018 7:43 pm 
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Koa
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First name: Willard
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Country: United State
Focus: Repair
Status: Semi-pro
AndyB wrote:
Sharp fixes most problems. Andy


Thanks Mr. B - this would be the 20th time in the last week I have heard this...do you gentlemen coordinate with each other to better tease us sharpening-challenged persons, or is this simply a solo effort to raise my frustration level? After 2-1/2 years, every time I think I am getting a pretty good edge, it is demonstrated that I have quite a lot to learn.

_________________
We have become a civilization that elevates idiots, prostitutes, and clowns. Am I still to defend it? Yes, for its principles. Yes, for what it was. Yes, for what it still may be.

-Mark Helprin, The Oceans and the Stars: A Sea Story, A War Story, A Love Story (A Novel)



These users thanked the author Woodie G for the post: Bryan Bear (Tue Feb 20, 2018 11:04 am)
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