How Long a Bed for Eliminating Snipe? - Router Forums
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post #1 of 33 (permalink) Old 03-21-2020, 07:25 PM Thread Starter
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Default How Long a Bed for Eliminating Snipe?

So I have a 13" Cutech spiral head planner and end up often getting snipe in the ends of the boards. I built a rolling cart to mount my planner that has an extended drawer that pulls out like a drawer and has a roller for the wood to exit with.

The 1st image shows the front and I could easily build a hinged wing at least the height of the cabinet to add to the planners infeed table.

In the 2nd side view image you can see the outfeed table is above the table and again a framed platform the same height of the outfeed table could be made.

The 3rd image shows the extension fully extended with the roller at the end. The extension can be adjusted in length from closed to fully open.

The last picture shows the folding side tables that are on both sides for aiding in sliding the wood back and forth when being planned.

The main objective is getting the least amount, or better yet none, of the snipe on the boards ends. Open to suggestions as always.
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post #2 of 33 (permalink) Old 03-21-2020, 07:35 PM
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My guess would be the roller has to be beyond the mid point of the board so that the weight of the board is closer to the planer than the outboard end.
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post #3 of 33 (permalink) Old 03-21-2020, 07:39 PM
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Some planers come with column locks that are supposed to lock them in place and they can help but don't necessarily eliminate snipe. If you measure the length of the snipe and then check the distance from your front and rear feed rollers to the planing head I think you'll find that they are the same. What I think is happening is that when the board goes under the infeed roller it lifts that side up but the outfeed side stays the same which is lower than that. The the board gets to it and both sides are lifted evenly. Then the board passes the infeed roller but is still under the outfeed roller so the infeed side drops down and the outfeed side stays up. That's where the problem is and a longer bed won't necessarily help that.
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post #4 of 33 (permalink) Old 03-21-2020, 07:43 PM Thread Starter
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My guess would be the roller has to be beyond the mid point of the board so that the weight of the board is closer to the planer than the outboard end.
Herb
That was my guess and I have used roller stands on much longer boards which seem to help very little. The longest boards I have run are about 10-12'. Depending on the project I may cut those shorter but usually only layout the board after planning and seeing the grain/features.
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post #5 of 33 (permalink) Old 03-21-2020, 07:49 PM Thread Starter
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Some planers come with column locks that are supposed to lock them in place and they can help but don't necessarily eliminate snipe. If you measure the length of the snipe and then check the distance from your front and rear feed rollers to the planing head I think you'll find that they are the same. What I think is happening is that when the board goes under the infeed roller it lifts that side up but the outfeed side stays the same which is lower than that. The the board gets to it and both sides are lifted evenly. Then the board passes the infeed roller but is still under the outfeed roller so the infeed side drops down and the outfeed side stays up. That's where the problem is and a longer bed won't necessarily help that.
Thanks Chuck, but not what I wanted to hear. Shucks Chuck, there has to be a way to minimize it. What I have found is that the thickness setting on this planner works very well. I've tested at 1/4", 1/2", 3/4" and 1". If set to the desired thickness on their preset control it will be as wanted. Now I just need to eliminate the snipe. I don't remember having that on my 15" planner back in the '80s, can't remember the make but took 4 stout guys to get into the basement shop.
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post #6 of 33 (permalink) Old 03-21-2020, 08:03 PM
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When I was on the farm in my younger days we had a 5hp. 12" wide Parks planer and it had a 8'long roller bed outfeed table like a Radial Arm saw. We were planing up to 20' long dimension lumber one piece at a time and rarely encountered snipe. Someone was always at the outfeed end supporting the board and stacking them as they came through.
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post #7 of 33 (permalink) Old 03-21-2020, 08:10 PM
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I had a 15"Delta planer that had spring loaded bottom rollers on the cast iron bed. As the board fed through the bottom rollers depressed 1/8",and as the board fed beyond the cutter head it had to pass over a spring loaded roller under the out feed roller. It was terrible for snipe.
I think you will like your CuTech, I like mine.
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post #8 of 33 (permalink) Old 03-21-2020, 08:17 PM
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Steve...are you getting snipe on the front and the back end..?

If you are, I think Charles hit it on the head...

I assume you've installed the feed and out rollers so that they create a level path with the Cutech's tables...? And the Cutech's in and out table and the two sets of rollers are level to each other and the surface under the cutter head...?

...just thinkin' out loud...you may have done that already...

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post #9 of 33 (permalink) Old 03-21-2020, 08:21 PM
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You can build a Planer Sled with a front and back block that holds the piece in place. Having the blocks/chucks with the same grain direction as the work piece helps. Securing the blocks especially the back can be a problem. People have used screws from the bottom, dowels, glue, double sided pin nails etc etc. When the blocks hold there is no snipe on the work piece, when they don't.... major kick back.
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post #10 of 33 (permalink) Old 03-21-2020, 08:28 PM
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