Shoulder plane question

[MikeW]

...I would like to know how much the sole behind the throat deflects when the 1/8th turn is applied.

I think you would find that there is a greater amount of deflection in front of the blade. The actual shape of the deflection is an elliptical curve, not a section of a circle.

There is a steeper rise leading to the mouth and a shallow rate of decline moving away from the mouth to the tail.

So what does that add to the conversation? Not much, really. Like a side escapement wooden plane, once working tension is decided upon (screws and or levers on all-metal shoulder planes and of course typically wood wedges on side escapement wood planes) and the sole "trued," arriving at that exact moment of force isn't an absolute necessity. At least if one understands that adjusting the force of the wedging action has a direct effect upon the blade's edge/sole relationship.

In practice, one can set the plane for the shaving required (sighting down the sole, feeling the blade's protrusion, a thin shim at the heel or toe, etc) and, as the LV instructions mention, use more or less force as required to obtain a lesser or greater cut.

People who have used wooden planes for a while understand this whether that realize it or not. Setting the wedge with too much force can affect an otherwise rank blade setting. Merely relieving the wedge's set can enable the iron to cut without the iron having moved.

One issue regarding a joinery plane, such as a shoulder plane, is that if there is too great of force applied by the securing mechanism it forces the user to over compensate by setting the iron ranker. Because this curves the sole, one can unintentionally curve the shoulder of a tenon because of the arc of the sole.

So whether it was a metal Stanley or my infill shoulder planes, if I wanted a fine shaving, I would place a piece of paper under the heel and allow the iron to settle to the surface of my bench. Then I would lightly set the tension (screw or wedge) enough that I believed the iron would not shift. If the iron shifted under use, force was increased to secure the blade.

Well, I'm rambling again :lol: It's been a long day (about 18 hours). And it all starts again at 5:30 am :shock:

Take care, Mike

 

[AHoman]

Well, I'm rambling again :lol: It's been a long day (about 18 hours). And it all starts again at 5:30 am :shock:

Mike,
You have the best rambles of anyone I know!
Please don't run yourself down, we need you! If you'd like, come on over for strawberry shortcake and fresh mint juleps after work tomorrow!
-Andy,
writing end-of-semester reports due next week and trying to avoid 18 hour days...

 

[David C]

Mike,

You are clearly working too hard.

The sole disturbance occurs behind the throat. Some kind person posted excellent photos of the tuning process which demonstrated this perfectly.

best wishes,
David C