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Thread: Drum sander conv speeds?

  1. #1
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    Drum sander conv speeds?

    I just got my Jet 10/20 drum sander. I have a question about conveyor speeds, there is no mention of it in the manuel (that I could find) is this just something your supposed to know. Is there a rule of thumb so many ft per sec for whatever boards thickness, Help?

    Thanks

  2. #2
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    I have the 16/32. Keep in mind that these are not meant for dimensioning of any large scale. The easiest way to think of the conveyor speed, in my head anyway, is the lower the grit and the more you want to remove, the slower you go. OK, I said that but my process is usually to set the speed no lower than about 70 regardless of grit. I prefer to take very shallow bites, so I can run the conveyor faster. The shallow bites help ensure no burning.

    A couple of points: 1) make sure the paper is tight on the drum and check it after a short run and routinely afterward, 2) clean the paper regularly with a crepe stick (it's safe to open the cover and turn on the drum as long as you keep your hand clear).
    Bill Arnold
    Citizen of Texas residing in Georgia.
    NRA Life Member and Member of Mensa
    My Weather Underground station

  3. #3
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    Thanks that helped a lot. When you say lower the grid is that lower in number like going from 80 grid to a less aggressive? or is lower in more coarse. I really wonder why they didn't put an info in the manuel about this.

    Thanks again

  4. #4
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    Lower grit number is coarser.
    Bill Arnold
    Citizen of Texas residing in Georgia.
    NRA Life Member and Member of Mensa
    My Weather Underground station

  5. #5
    Join Date
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    central florida
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    I think the smaller the grit or the the larger the depth of cut or sanding the the slower the conveyor speed. I also have a jet 16/32. It takes a little getting used to when setting up these open end sanders. I am assuming that your machine has the same "1/4turn = 1/64 in" label on it. If you are using a light paper like 150 or 220 then that height adjust ment is crucial and the conveyor speed should be very slow. don't get impatient as a slower speed will make the paper last longer in my opinion but it seems like time drags on forever while waiting for a board to make a full pass at the slowest setting. If you have 80 grit paper in there you can go pretty quick even if you are taking 1/32 or 3/64 off.

  6. #6
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    Some of the discussion terms here are getting a little cloudy. A picture is worth. . .
    Attached Thumbnails Attached Thumbnails Capture.jpg  
    Any sufficiently advanced technology is indistinguishable from magic.
    - Arthur C. Clarke

  7. #7
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    Bill Thanks I know about grits sometimes I think that's all I know!

    Glenn thanks for the picture I printed it out but call me stupid, I couldn't relate it to what converyor speed should be used. I am starting realize there are a lot of varibles to converyor speeds. It seems one just has to learn by experience. I was hoping there was a simple rule of thumb. What all of you are saying makes sence.

  8. #8
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    Conveyer (feed) speed will also vary with the width of what's being sanded, and also with the density of the wood. A 2" wide piece of pine might go thru at 100% of feed speed, but a 10" wide piece of maple might only feed at 40%.

    I never try to take more than 1/64" at a pass, and on wider hardwood stock the limit is often more like 1/128".

    Overall, I'd guess my "average" pass on 5~6" wide stock of any kind would be something like 1/100" at 50% feed speed.

    If I need to 'hog' off thickness, I have a planer.

    BTW, the blue 'Zirconia' belts are much longer lasting than the red AlOx ones. They are costlier, though.
    Jim D.
    Adapt, Improvise, Overcome!

  9. #9
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    Interesting chart, Glenn. Is there a link from which could print that out and put it in the shop?
    ++++++

    Some say the land of milk and honey; others say the land of fruits and nuts. All together my sort of heaven.

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  10. #10
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    Quote Originally Posted by Carol Reed View Post
    Interesting chart, Glenn. Is there a link from which could print that out and put it in the shop?
    Not the same chart, but here's a PDF file from the AWA site I found via Google:

    http://www.woodturners.org/tech_tips...ve_grading.pdf
    When the going gets weird, the weird turn pro. - Hunter S. Thompson
    When the weird get going, they start their own forum. - Vaughn McMillan

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