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Jet JPM-13

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Forum topic by Buker posted 06-23-2016 12:19 PM 314 views 0 times favorited 1 reply Add to Favorites Watch
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Buker

1 post in 167 days


06-23-2016 12:19 PM

Hey everyone. new here.

I have a question about a used Jet JPM-13 planer i purchased. I have never used a planer, so don’t know a whole lot about them. This one i purchased have Moulder blades in it when i got it, it came with several moulder lades and a set of planer blades. So i removed the moulder blades in the planer and installed the planer blades per the manual i downloaded. after that i adjusted the feed roller per the manual. Once i finished installing the planer blades, i started the planer up and fed a piece of walnut through, the feed roller grabbed the board and pulled it through, but the blades never made contact with the material..i had table cranked up pretty much as far as i could, it’s like the blades aren’t making contact..I rechecked the adjustments per the manual 3inch block of wood to guage cutter head, 2-7/8” block of wood to guage the feed roller is 1/8” below cutter head etc..I’m at a loss…Does anyone have any info they can share about these Jet JPM-13 planers?

Thanks


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JBrow

818 posts in 385 days


#1 posted 06-26-2016 03:46 AM

Buker,

I am not a Jet owner so I looked at the manual for the Jet Model JPM-13CS planer/moulder which I assume is similar to your planer/moulder. Comparing your description to the Jet manual, it appears to me you have set up the infeed (and I assume the outfeed rollers) and the cutter head correctly.

I can only think of three possible explanations for the problem you described.

1) The work piece was thinner than ½”, which is the minimum thickness the Jet can achieve.

2) The upper limit planer bed stop is incorrectly set, preventing the planer bed from achieving the minimum stock thickness. The upper limit stop, if the planer has one, should allow a workpiece that is ½” thick to just kiss the planer knives. This could be checked by unplugging the planer and removing the hood to expose the cutter head. The planer bed is raised to its highest setting or until a ½” thick x 3” long piece of material will just contact the planer knives. If the planer bed will not raise enough for the knives to contact the ½” thick material, I would think a limiting stop is improperly set.

3) The planer bed was not raised beyond the height at which the infeed roller grabbed the stock. Based on the step up description in the Jet manual, the planer bed must be raised a 1/8” higher from the setting where the infeed roller just contacts the stock.

When I am setting up to plane a stack of rough lumber, I first identify the board that is thickest. I then use this board to set the initial height of the planer bed. After the bed is set so the feed rollers just grab and propel the stock, I make several set-up passes wherein I raise the planer bed a little and then run the work piece through the planer. I continue this process until the planer knives just begin to remove material. This then becomes the starting point of the planing operation.

I only raise the planer bed when no stock is on the bed. I find it too difficult to operate the height adjusting crank when the feed rollers are in contact with the stock.

I failed to see any mention in the Jet manual that stated the distance the planer bed rises or lowers with one full crank of the planer bed height adjusting crank. This is handy information when using the machine.

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