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  #31  
Old 06-13-2019, 07:05 PM
charles Tauber charles Tauber is offline
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Quote:
Originally Posted by Neil K Walk View Post
Frankly though, I'm stumped that such a fitting can't be found easily off the shelf at the local Ace Hardware.
I seem to recall someone using a bolt-mount pipe flange.
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  #32  
Old 06-13-2019, 07:44 PM
printer2 printer2 is offline
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Originally Posted by redir View Post
Brilliant! Indeed a 3d printer would be perfect for such and application.
I am not sure how I am to feel about this.
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  #33  
Old 06-13-2019, 08:28 PM
JonWint JonWint is offline
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Metal donut looks like toilet water supply wall cover:
[IMG][/IMG]

StewMac's TrueChannel uses a nylon donut:
[IMG][/IMG]

You would have to buy the entire carriage for $116.

You could lathe-turn one out of nylon or Delrin.
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  #34  
Old 06-13-2019, 10:04 PM
Neil K Walk Neil K Walk is offline
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Does the donut have to have a beveled edge? Would a simple nylon washer work?

The way I see it, the way this differs from a simple edge router guide attachment is that has a wider surface (the dumbbell) to true against the side of the guitar and a smaller surface (the donut) to simply keep the depth of the cut consistent as the surface being cut moves along. I’m guessing the focus is to maintain even pressure on the edge guide (the dumbbell) to keep things square?As long as the plunge base on the router stays tight the donut will keep the bit from cutting downward any further than you set it?
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2013 OLF MJ (DIY build, western red cedar, Honduran mahogany)
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  #35  
Old 06-14-2019, 06:50 AM
JonWint JonWint is offline
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There is no bevel, but the contact width is only about 1/8" wide.

This is the Martin factory jig. (I ran out of pixels with enlargement.)

[IMG][/IMG]

They have a bit organizer board with about 30+ bits. Side and top ledges are cut in the same pass. The vertical guide plate may be beveled. But I don't think it is adjusted from back to top routing.
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  #36  
Old 06-14-2019, 07:12 AM
redir redir is offline
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I am not sure how I am to feel about this.
Took me a second, but I got it
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  #37  
Old 06-14-2019, 07:44 AM
Neil K Walk Neil K Walk is offline
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Quote:
Originally Posted by JonWint View Post
There is no bevel, but the contact width is only about 1/8" wide.

This is the Martin factory jig. (I ran out of pixels with enlargement.)

[IMG][/IMG]

They have a bit organizer board with about 30+ bits. Side and top ledges are cut in the same pass. The vertical guide plate may be beveled. But I don't think it is adjusted from back to top routing.
Yeah, I saw that on the Martin tour which is what gravitated me toward this idea. I saw a woman using that jig. She held the guitar bodies up against hers and was zipping through a guitar body a minute. She had the technique down and she didn't stop for long between guitars to adjust the jig. I'm guessing she was working in blocks of guitars with the same specs. She was working so fast there were 5 people doing the next step and she was STILL building up a backlog.
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2013 OLF MJ (DIY build, western red cedar, Honduran mahogany)
2012 McKnight McUkulele
2009 Martin D-16GT
2006 Larrivee OM-03R
1998 Fender American Standard Stratocaster (Natural ash)
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  #38  
Old 06-17-2019, 04:14 PM
Neil K Walk Neil K Walk is offline
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I did a test run the other day, then made some modifications today:



I modified the donut and added a collar.





I swapped out the old dumbbell for a barrel bolt with steel spacers. A 1/4" threaded rod now passes up from the base of the arm and is held tight by a clamping knob. The donut is a nylon furniture slider with a soft collar with a 1" diameter. It had a convenient pilot hole that I enlarged with a 1" brad bit on my drill press. I like that it had some convenient mounting screws to hold it all in place.



My test run demonstrated that the vibration from the laminate trimmer will cause any loose parts to rattle. I was able to get a serviceable ledge on both a test 2x4 and an MDF bending form (that never gets used) but after a few passes the rods that hold the adjustable portion true worked loose. I need to get another clamping knob.

The biggest problem is that the laminate trimmer does not extend any further. It barely extends past the donut. Time to upgrade to a better router. SMH.
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2013 OLF MJ (DIY build, western red cedar, Honduran mahogany)
2012 McKnight McUkulele
2009 Martin D-16GT
2006 Larrivee OM-03R
1998 Fender American Standard Stratocaster (Natural ash)
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  #39  
Old 06-19-2019, 05:35 PM
printer2 printer2 is offline
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Recess the donut a little.
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  #40  
Old 06-19-2019, 07:00 PM
Neil K Walk Neil K Walk is offline
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I modified the trimmer mount. There was a protrusion inside the carriage assembly designed for I have no idea. I broke out my Dremel, installed the sanding wheel and ground it off. Now the trimmer descends further down and I can now route deep enough to do a binding strip.

My first test on a square and straight-edged blank showed good results. Getting used to a curved edge with a radius on the top will take more practice.
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~ Neil

2013 OLF MJ (DIY build, western red cedar, Honduran mahogany)
2012 McKnight McUkulele
2009 Martin D-16GT
2006 Larrivee OM-03R
1998 Fender American Standard Stratocaster (Natural ash)
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  #41  
Old 07-03-2019, 10:58 PM
Neil K Walk Neil K Walk is offline
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I finally put it to use on my latest build and the results were pretty good. There were no sudden “oopsies” and I made sure to rotate the body in the proper direction to prevent tear out. I even went so far to use a big piece of chalk to mark the start and finish lines and put big arrows to indicate the proper direction. Now I need to go over some spots with a file but that’s par for the course from what I understand.
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2013 OLF MJ (DIY build, western red cedar, Honduran mahogany)
2012 McKnight McUkulele
2009 Martin D-16GT
2006 Larrivee OM-03R
1998 Fender American Standard Stratocaster (Natural ash)
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  #42  
Old 07-04-2019, 06:24 AM
redir redir is offline
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Neil what did you end up using for a doughnut?
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  #43  
Old 07-04-2019, 07:26 AM
Neil K Walk Neil K Walk is offline
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Quote:
Originally Posted by redir View Post
Neil what did you end up using for a doughnut?
A felt furniture boot with a plastic rim with a 3” outer diameter and a rubber ring with a 1” inner diameter. I mounted it on a piece of scrap wood using the set screws and drilled out the middle with a 1” spade bit on my bench top drill press. It ended up being just shape I needed and the rubber ring acts as the perfect stop.
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~ Neil

2013 OLF MJ (DIY build, western red cedar, Honduran mahogany)
2012 McKnight McUkulele
2009 Martin D-16GT
2006 Larrivee OM-03R
1998 Fender American Standard Stratocaster (Natural ash)
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  #44  
Old 07-04-2019, 07:29 AM
redir redir is offline
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Quote:
Originally Posted by Neil K Walk View Post
A felt furniture boot with a plastic rim with a 3” outer diameter and a rubber ring with a 1” inner diameter. I mounted it on a piece of scrap wood using the set screws and drilled out the middle with a 1” spade bit on my bench top drill press. It ended up being just shape I needed and the rubber ring acts as the perfect stop.
Sweet thanks! I'm going to see if I can find something like that.
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  #45  
Old 07-04-2019, 03:53 PM
printer2 printer2 is offline
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What are you guys using for bits?
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