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dpb[_3_] dpb[_3_] is offline
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Default Planing Across The Grain, Just To Prevent Snipe

On 3/30/2019 10:19 AM, DerbyDad03 wrote:
On Saturday, March 30, 2019 at 10:22:54 AM UTC-4, dpb wrote:
On 3/29/2019 7:05 PM, DerbyDad03 wrote:
I'm still trying to learn things about my planer....

I need to plane some poplar down by no more than 1/32". However, the boards
are already cut to length and have tenons on the ends. (Don't ask)

I really want to avoid any snipe on these boards so I'm thinking of using
the Sacrificial Board technique. Here's my idea:

Cut a groove in the sacrificial board, insert the tenons in the groove, and
run it all through the planer. With the setup shown below, I can easily run
4 boards through at one time. (I'm only showing 2 in this example) My only
concern is that the sacrificial board(s) will be planed cross grain.

https://i.imgur.com/s3bxz1G.jpg

From a safety perspective, is there any reason I shouldn't try this?

Yes, I know I could do the same thing with a sacrificial board running
with the grain, but I'm sure this question will start an interesting
discussion, as usual.


How are you proposing to keep the trailer in place?

90-degree cross grain is scary...but if you only take paper-thin passes
and with poplar you've got at least a _reasonable_ chance you won't have
an explosion. What _can_ happen is instead of a knife cutting cleanly,
the piece of material simply fractures and throws chunks back at you
(damhikt).

My answer is
1) thickness sander


Don't have one, not going to buy one.


Find a local shop w/ one that will run 'em for you...

2) jointer


Don't have one, not going to buy one.


Can't do without...

3) hand plane


Have old hand-me-downs which I don't plan to refurb and/or learn to use.


Ditto squared...


not necessarily in that order...


In that order ;-)


4) Use sanding disk in the TS -- a (very) slightly a-kilter fence for
lead in to the final thickness on trail side. A couple passes or three...

5) Resaw...

6) Just change your design...

I'll never recommend 90-deg cross grain in a planer again--it was that
scary (albeit it was a case where I "just wasn't thinking!" and did have
it set at a cut but at least for me, it ain't something I'm doing again.

I still don't follow how you would intent to solve the first Q? I posed,
however...

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