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SCMS blade out of alignment

brucet9 | Posted in Tools for Home Building on March 20, 2009 07:46am

My Bosch 4410 has developed an alignment problem whereby the trailing edge of the blade is no longer aligned with the rails, causing the teeth on the trailing edge to start cutting a little more wood as they pass through the kerf.

It looks like the head is attached to the rails by a set screw on each side. Is that where the adjustment would be made?

BruceT


Edited 3/20/2009 12:47 am by brucet9

Reply

Replies

  1. User avater
    IMERC | Mar 20, 2009 05:25pm | #1

    look to the fence being out of alignment...

     

    Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming

    WOW!!! What a Ride!


    Forget the primal scream, just ROAR!!!

     

    "Some days it's just not worth chewing through the restraints"

    1. User avater
      Dam_inspector | Mar 20, 2009 06:08pm | #2

      The head is out of alignment with the rails. The cut would be out of square if the fence was out of alignment. So the head needs trued to the rails.I would check that the fence is square to the rails first. Then square the blade to the fence and check the cut.

      1. brucet9 | Mar 20, 2009 06:38pm | #3

        The head is indeed out of alignment to the rails. The question is how do I re-align it?BruceT

        Edited 3/20/2009 12:01 pm by brucet9

        1. User avater
          Dam_inspector | Mar 20, 2009 07:00pm | #4

          I didn't see how to do that in the owners manual.
          http://mdm.boschwebservices.com/MDMCache/t10/0000000/r00163v-1.pdfHere is the parts diagram.
          https://www.boschtoolsservice.com/Order/IPL/IPLDetails.aspx?tn=060166E139;%20060166E222&mn=4410init=1

          1. brucet9 | Mar 21, 2009 05:25am | #8

            Thanks.The little set screws (194) on the knuckle (33) attach the head to the rails. If I loosen one of them and tap the knuckle with a hammer, I can get it back in alignment - after a suitable number of cycles of loosen-tap-tighten-test.BruceT

        2. User avater
          IMERC | Mar 20, 2009 07:06pm | #5

          I have the information you need in an attachment that doesn't wanna load...

          can I send it via email???

          if so PM me...  

          Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming<!----><!----><!---->

          WOW!!! What a Ride!

          Forget the primal scream, just ROAR!!!

           

          "Some days it's just not worth chewing through the restraints"

          1. Piffin | Mar 21, 2009 02:19pm | #10

            can't send attachments thru the prospero email system. you guys gotta exchange email addies.Semd him one thru here with out atachment, then when he replies, you have his e-addy 

             

            Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!

          2. User avater
            IMERC | Mar 21, 2009 05:15pm | #11

            got the attacment to post....

            so we be good.... 

            Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming<!----><!----><!---->

            WOW!!! What a Ride!

            Forget the primal scream, just ROAR!!!

             

            "Some days it's just not worth chewing through the restraints"

        3. User avater
          IMERC | Mar 20, 2009 07:09pm | #6

          trying again...

          edit: no need to PM...

           

          Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming<!----><!----><!---->

          WOW!!! What a Ride!

          Forget the primal scream, just ROAR!!!

           

          "Some days it's just not worth chewing through the restraints"

          Edited 3/20/2009 12:13 pm by IMERC

          1. brucet9 | Mar 21, 2009 05:20am | #7

            Thanks. I don't know where you got that diagram, but that's exactly what the Bosch senior technician told me this morning. Apparently, by bumping the saw hard or by a piece of wood getting jammed between blade and one of the two halves of the fence, the head can be tweaked out of alignment. By loosening one of those two little set screws on the front rail knuckle and tapping the knuckle you can get it back into alignment. He said that there's about 1/8" of in/out movement available on each side, so plenty of room to adjust. Should take only about a couple of thousandths. It'll take some patience, though, because it'll be a trial and error process until I get it right on.BruceT

          2. User avater
            IMERC | Mar 21, 2009 06:18am | #9

            I got my sources....

            glad it helped... 

            Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming<!----><!----><!---->

            WOW!!! What a Ride!

            Forget the primal scream, just ROAR!!!

             

            "Some days it's just not worth chewing through the restraints"

          3. MisterT | Mar 26, 2009 01:16pm | #12

            Hey!!I just spent a half a day tuning up my SCMS...found out the cast mark for 45 deg. was off just under a 1/2 degree...just on ONE side tho!!??Now I'm thinking I got to check that TOO!!THNX!!.
            .
            "After the laws of Physics, everything else is opinion" -Neil deGrasse Tyson
            .
            .
            .
            If Pasta and Antipasta meet is it the end of the Universe???
            .
            .
            .
            according to statistical analysis, "for some time now, bears apparently have been going to the bathroom in the woods."

          4. fatboy2 | Mar 26, 2009 07:14pm | #13

            Just came across this site by Gary Katz, et al, and there is a hugh article about tuning chop saws of every ilk.
            http://www.thisiscarpentry.com/imag/issue2/2.htm
            Stef

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