Dual Positioning Fence Advantageous? - Router Forums
 
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post #1 of 9 (permalink) Old 01-14-2014, 11:46 PM Thread Starter
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Default Dual Positioning Fence Advantageous?

The primary design of the fence that I want is a pivoting fence. I have been thinking that I could also design in a dual T-track system or similar to provide standard sliding fence positioning in conjunction with the pivot type positioning.

I'm looking for your comments to see if the additional complexity of the T-track system is worth it. The pivot fence by comparison would be quite simple: pivot side would contain a sleeve bearing and a pin with threaded end to lock it down and a clamp on the other end. Actually. because I'm going to use a sleeve bearing and matching pin there should be minimum play at the pivot end, so I'm not even sure that end needs to be locked down (I could get away with just a pin)?? The T-track system would be designed with the tracks along the outside edges of the table.......I don't want to have trenches or tracks in the table itself.

What operations would be better performed with a standard sliding fence?
Is the complexity of the dual positioning fence advantageous?

Thanks,
Greg
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post #2 of 9 (permalink) Old 01-15-2014, 03:20 AM
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Greg you could easily have a pivot on one side and a t track on the other. You just need to make a slot in the fence for the knob and t bolt to slide back and forth in to allow for the changing distance from the pivot to the locking point. But if you don't want the t track in the surface of the table then why bother. A clamp along the edge will serve the same purpose.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #3 of 9 (permalink) Old 01-15-2014, 06:38 AM
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"Keep it simple." A pair of C clamps will allow you to position your fence anywhere on your table top; no limitations.

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post #4 of 9 (permalink) Old 01-15-2014, 07:29 AM
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Greg sometime ago Jessem had put out a router table like what you are talking about.I have one if I get a chance I will get some pictures and post them. I never use it so I will have to dig it out.
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post #5 of 9 (permalink) Old 01-15-2014, 08:56 AM Thread Starter
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Originally Posted by Cherryville Chuck View Post
Greg you could easily have a pivot on one side and a t track on the other. You just need to make a slot in the fence for the knob and t bolt to slide back and forth in to allow for the changing distance from the pivot to the locking point. But if you don't want the t track in the surface of the table then why bother. A clamp along the edge will serve the same purpose.
Using a T-track and clamp, as you suggested is what I am planning to do. Also, I am planning to have a T-track on the pivot side. This will allow me to pivot the fence or use it conventionally. I like the T-track idea with knobs to lock down fence, as opposed to clamps. Just slide fence into position and spin down knobs.

Of course this is a lot more work and complexity, so does it make sense to have both fence options or can I do everything with the pivoting fence?

Thanks,
Greg
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post #6 of 9 (permalink) Old 01-15-2014, 09:14 AM
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Hi Greg, I make a lot of boxes and I wanted to use the same router bit and fence to cut two different profiles on the lids of boxes. I have a couple photos that may explain how I do it. To make the original setup I set the bit to the correct height and used two clamps to hold the fence in place. I experimented to get the get the first profile that I wanted. I then drill a 3/8" hole through the right side of the fence and on through the router table (I make my own tables and fences). I inserted a 3/8" bolt through the fence and table. Since the hole is the same size as the bolt I don't need a nut on it. On the left side I drill a 3/8" hole through the fence and table. To get the 2nd profile that I wanted I didn't want to drill the hole on the left side too close to the first hole. I left the bolt in the hole on the right side and moved the fence back and clamped it until I got the profile I was looking for. Once I got that I drilled a 2nd hole in the fence and table on the left side. I drill this hole an inch or so from the first hole and slightly off to the side so that I wouldn't accidentally put the bolt in the wrong hole. To put the profiles on the box lid I put the bolt in the hole on the right side and a bolt in the first hole in the fence on the left. I make the cut. I pull the bolt on the left side and stick it in the 2nd hole in the fence and slide the fence back until the bolt drops into the 2nd hole. I used this for years with perfect results. Malcolm / Kentucky USA
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post #7 of 9 (permalink) Old 01-15-2014, 10:35 AM
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"What operations would be better performed with a standard sliding fence?
Is the complexity of the dual positioning fence advantageous?"
************************************************** **
My drill press fence operates as you suggest, a pivot and a set of ways and drive screw for a secondary fine-adjust. Every advanatge.
Quick rough positioning, then fine tuning to a center line or whatever.
For routing, it affords the luxury of incremental waste/pass.
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post #8 of 9 (permalink) Old 01-15-2014, 11:57 PM Thread Starter
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kywoodchopper,

Nice method for repeatable results.

So far I haven't heard of any negatives on the pivot fence, although most pictures of router tables, either DIY or store bought are of the sliding fence design. The only real advantage that I see for the sliding fence is for a series of dadoes on a a large panel.

What got me first interested in the pivot fence was a chapter on router tables in the book, "Fine WoodWorking on Woodworking Machines". The chapter was by Wallace Kunkel. It was a pretty neat pivot design, but the fence could be moved out of the pivot location easily. The only thing that I didn't like about it was that the fence went from opposite corners on the diagonal. This would leave the operator to maneuver around the corner of the table as the work was being fed through the bit.

Thanks,
Greg
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post #9 of 9 (permalink) Old 01-16-2014, 12:45 AM
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I have dual t tracks. I can pivot the fence a little to make fine adjustments. I haven't had the need to pivot any farther than the t bolts allow, but if I did, I could always remove one bolt and pivot from the other. Then clamp the fence in place.

Two reasons I have tracks...
1) Quickly slide the fence rearward so I can pull the router for bit change.
2) Slide it rearward when I need to use the miter saw, which is located to the right of the router table on the same plane.

I guess with a pivot pin you would just lift the fence and move it out of the way, huh?
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