Jointer extended fence question

[STB]

For my current project I built an extended fence for the jointer. The plan was to use the jointer to cut a 1 1/2 in rabbit on the edge of a 1/2 in MDF sheet 13" x 76"

[ATTACH]16447[/ATTACH]

[ATTACH]16448[/ATTACH]

After adjusting the feather boards to what I thought the best position. I started the cut and about two thirds through the cut the out-feed end of the fence flexed upward.
Because the fence is attached at the in-feed end and the out-feed end of the fence kind of flaps in the wind I do not understand how the shopsmith jointer auxillary fence kit controls the down force of the out-feed fetherboard. What have I missed?
My thought is to fasten a "L" bracket at the end of the axillary fence and clamp it to the jointer base.

[JPG]

For my current project I built an extended fence for the jointer. The plan was to use the jointer to cut a 1 1/2 in rabbit on the edge of a 1/2 in MDF sheet 13" x 76"

[ATTACH]16447[/ATTACH]

[ATTACH]16448[/ATTACH]

After adjusting the feather boards to what I thought the best position. I started the cut and about two thirds through the cut the out-feed end of the fence flexed upward.
Because the fence is attached at the in-feed end and the out-feed end of the fence kind of flaps in the wind I do not understand how the shopsmith jointer auxillary fence kit controls the down force of the out-feed fetherboard. What have I missed?
My thought is to fasten a "L" bracket at the end of the axillary fence and clamp it to the jointer base.

What is supporting the workpiece after it leaves the out feed table? The fence/feather board should not be expected to hold it down. The 'finished' end needs to be supported.(as well as the infeed end).

[dusty]

IMHO, wrong tool for the job.

A 76" long piece of MDF is too heavy and difficult to handle. Did you employ a helper to manage the material coming off the table. The jointer bed is too short for this job and the fence is inadequate. You are asking too much of the feather boards.

But, if I had the mandate to do what you are attempting the first ting I would do is build an outfeed table for the jointer.

[JPG]

P.S. I shudder at the thought of running MDF through those jointer blades!:eek:

Sharpening them is not my favorite pastime!

[STB]

IMHO, wrong tool for the job.

A 76" long piece of MDF is too heavy and difficult to handle. Did you employ a helper to manage the material coming off the table. The jointer bed is too short for this job and the fence is inadequate. You are asking too much of the feather boards.

But, if I had the mandate to do what you are attempting the first ting I would do is build an outfeed table for the jointer.

Not showing in the picture is an out feed support. My intended question was how does the Shopsmith control the flex in the fence when using an auxiliary jointer fence kit. Or do they control the flex?

PS Now I am in trouble. Just fixed myself an omelet and had the plate a little to close to the stove burner. When I placed the plate on the plastic table cover it melted a hole in the cover. I need to think of a way to deal with this before SWMBO wakes up or somehow minimize the situation.

[robinson46176]

Not showing in the picture is an out feed support. My intended question was how does the Shopsmith control the flex in the fence when using an auxiliary jointer fence kit. Or do they control the flex?

PS Now I am in trouble. Just fixed myself an omelet and had the plate a little to close to the stove burner. When I placed the plate on the plastic table cover it melted a hole in the cover. I need to think of a way to deal with this before SWMBO wakes up or somehow minimize the situation.

Your jointer fence problem should all work out OK. As far as the table cover goes I believe that you are screwed...


.

[dusty]

Not showing in the picture is an out feed support. My intended question was how does the Shopsmith control the flex in the fence when using an auxiliary jointer fence kit. Or do they control the flex?

PS Now I am in trouble. Just fixed myself an omelet and had the plate a little to close to the stove burner. When I placed the plate on the plastic table cover it melted a hole in the cover. I need to think of a way to deal with this before SWMBO wakes up or somehow minimize the situation.

Get ready for a trip to Bed, Bath and Beyond. You will be buying table spreads today.

[JPG]

CI does not flex(much).

The jointer fence is supported from one end.

A fence extension should rest on the outfeed table(as shown in your pix)

As a 'hold down', the fence will not work, nor will the fence extension except for light stress(warpage maybe).

A finger type hold 'down' is not intended to support long workpieces, but is intended to apply localized pressure to maintain contact against a reference surface only.

Change the table cloth and hope she does not notice it today, nor miss it later!

Uh Huh! When pigs fly!:eek:

[STB]

Your jointer fence problem should all work out OK. As far as the table cover goes I believe that you are screwed...


.

You were correct I am screwed.
I turned the table cover around so the melted spot was on her side and covered it with the Sunday paper. SWMBO came out of the bedroom went directly to the cover (how did she know).
I had to endure the:
Table cloth lecture
The keep out of the kitchen lecture
The dirty dishes in the sink lecture
The Cholesterol lecture
Finley I need to buy a new cover lecture
I had to go out and cut some boards:D

[dusty]

You were correct I am screwed.
I turned the table cover around so the melted spot was on her side and covered it with the Sunday paper. SWMBO came out of the bedroom went directly to the cover (how did she know).
I had to endure the:
Table cloth lecture
The keep out of the kitchen lecture
The dirty dishes in the sink lecture
The Cholesterol lecture
Finley I need to buy a new cover lecture
I had to go out and cut some boards:D

I assume that you clammed up and did not say a single thing about her getting up to fix you breakfast so that this would never happen again.