Pseudo Jointmatic?

[JPG]

Inquiring mind wants to know, how did the 'adjuster' get scratched?;)

[algale]

[quote="JPG40504"]Inquiring mind wants to know, how did the 'adjuster' get scratched?]

Other inquiring minds want to know what those the pseudo main table legs are and what are they used for (when not set up in this test configuration).

[reible]

For those of you following the thread, perhaps a few more words might make it easier to understand what issues come into play when attempting to obtain vertical adjustment of the table with the "adjuster".

First the design of the adjustable stop collar has a range of 1". Once you have used up your 1" it would then be at the extent of its range and you will have to move it and re-registered it. Can it be done, sure. How accurate will it be? That depends on who is doing it and how many times it needs to be done. You will also have to rewind it before you start again.

Let's look at what would need to happen to make a 1/2" box joint. First the router bit to wood reference would have to be established. The stop collar would then be zeroed and locked in place. At this point the wood would pass uncut by the bit, which is OK for half of the joint. The other piece needs to be cut 1/2" "up" or 8 turns on the stop collar. Now you can make your first cut. Next cut is 8 turns away........ and you are at the limit. But you can make that cut, after that you need to re-index and turn it back 16 turns so make the next adjustment, and so on and so on. First joints will be fine but after that many other factors creep in.

You can think on that a spell.

Ed

[dusty]

Other inquiring minds want to know what those the pseudo main table legs are and what are they used for (when not set up in this test configuration).

[img]http://shopsmith.net/forums/data:image/gif][IMG]http://shopsmith.net/forums/data:image/ ... Kp2VkgADs=[/img]
Those pseudo table legs are really "table legs". They were salvaged from a defective Table Bar and Tube Assembly (514344). As configured in the referenced photo, they function as adjustable vertical stabilizers for my Main Table. They really serve me best when I need to micro-adjust main table tilt (NOT what is shown here).

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[beatnik]

I don't really understand what the jointmatic does, couldn't find anything anywhere. In my mind I keep thinking a setup with a milling drilling table would give you indicators for repeatable movement. Setting up as a pin router.

[claimdude]

Ben,

I modified the Jack-Bench design for my work bench. It is a beast but works as advertised. There are jacks mounted inside the leg assemblies that raise and lower the table and the whole bench for movement.

Jack
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Dusty,

Ed,
I had never given a thought to the pressure between the router and the main table. As I give it some thought, I would presume that the bit would break first, though between the table breaking or a sharp bit spinning a 25000 rpm when it breaks, neither is a fun thought!!:eek:

Thanks to everyone for their thoughts and concerns. As soon as I figure out how to reliably secure the legs on my adjustable woodworking bench (which may take more than I can design ), I have a hankering to build some furniture and was looking for a good method for making mortises. The Jointmatic seems an easier way for "me" to accomplish that.

I guess I'll shelve the idea of making something like a Jointmatic, until I really need it.

The diversion away from my current project (the adjustable height bench) was to let me change focus until I can design a reliable leg clamp system (angle iron, wood 4x4s, cam lock, pipe clamp, hole and peg!!!! ARG!!! too many choices and no real clear path). So rather than pick one, I let my mind drift into Make a Jig Land!

Again, thanks for your thoughts. They are all appreciated.

Be well,
Ben