Header Ad

Collapse

BT3K motor does not sound right!!

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • BT3K motor does not sound right!!

    It has been a while since I posted (or even been in the shop)!

    Not sure how to explain this but it sounds as if the motor starts at higher speed and then slows down!! I noticed it last weekend, cleaned up the saw (some saw dust within the brushes) and it sounds a bit better but not consistent as I like it. It seems to be cutting OK and does not slow down under the load (at least sounds that way). Wonder if anyone has had similar experience and what else I should be looking for? The saw if from 1999 but it is well cared for.

    Thanks in advance for any help, Turaj
    Turaj (in Toronto)
    "When I read about the evils of drinking, I gave up reading!" Henny Youngman

  • #2
    Does the sound change with a different blade? Thinking blade is warped possibly.
    Harumpf!
    GrumpyDad

    Comment


    • #3
      Have you tried blowing the saw motor out with some compressed air (well your post said you "cleaned" it some) to clean it of sawdust? Old saw, many years...

      The other thing that comes to mind is bearings. Normally they are sealed and don't need oil lube though...
      Last edited by LCHIEN; 04-27-2021, 02:50 AM.
      Loring in Katy, TX USA
      If your only tool is a hammer, you tend to treat all problems as if they were nails.
      BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questions

      Comment


      • #4
        Thanks Guys. I did try different blades but did not notice any difference.

        Loring, when you say blow the motor, how exactly do you do that? I used the shopvac to suck the dust from the opening for brushes but did not use any compressed air. Do you take the whole motor cover off or just blow air through those holes? I have never done that!

        Thanks again, Turaj
        Turaj (in Toronto)
        "When I read about the evils of drinking, I gave up reading!" Henny Youngman

        Comment


        • #5
          How about posting a video on Youtube and linking here?

          If it starts normally then slows and makes noise, I might suspect a capacitor issue. But I don't recall exactly how this motor is wired.

          Comment


          • #6
            Originally posted by Carlos View Post
            How about posting a video on Youtube and linking here?

            If it starts normally then slows and makes noise, I might suspect a capacitor issue. But I don't recall exactly how this motor is wired.
            The type of motor used in the BT3 series is a Universal motor.
            They don't have capacitors for starting or running, like induction motors used in contractor table saws, so I am certain that is not the problem.
            However Universal motors do have brushes that induction motors don't have.
            Last edited by LCHIEN; 04-27-2021, 06:15 PM.
            Loring in Katy, TX USA
            If your only tool is a hammer, you tend to treat all problems as if they were nails.
            BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questions

            Comment


            • #7
              Originally posted by Turaj View Post
              Thanks Guys. I did try different blades but did not notice any difference.

              Loring, when you say blow the motor, how exactly do you do that? I used the shopvac to suck the dust from the opening for brushes but did not use any compressed air. Do you take the whole motor cover off or just blow air through those holes? I have never done that!

              Thanks again, Turaj
              To be honest, I've not had to do it. I use fairly aggressive dust collection on my saw.
              But compressed air will have a lot more power than a vacuum which on a perfect day will have 15 psi of force (and real world vacs don't reach anywhere near a full vacuum) Compressed air of 90 PSI or so will do a much better job of cleaning, but the airflow direction will be opposite. Just blow air over through any ventilation slots. Don't take it apart.
              Last edited by LCHIEN; 04-28-2021, 02:36 AM.
              Loring in Katy, TX USA
              If your only tool is a hammer, you tend to treat all problems as if they were nails.
              BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questions

              Comment


              • #8
                Have you checked the two drive belts and pulleys for wear or deterioration?
                Loring in Katy, TX USA
                If your only tool is a hammer, you tend to treat all problems as if they were nails.
                BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questions

                Comment


                • #9
                  Originally posted by LCHIEN View Post
                  Have you checked the two drive belts and pulleys for wear or deterioration?
                  Yes, I do regularly check the belts. I'll try to clean the motor by blowing air but probably won't happen until the weekend. I'll report back.

                  Meanwhile I am open to any other suggestions. Thanks, Turaj
                  Turaj (in Toronto)
                  "When I read about the evils of drinking, I gave up reading!" Henny Youngman

                  Comment


                  • #10
                    We are all getting older. Have you had your hearing checked?
                    just another brick in the wall...

                    Comment


                    • #11
                      Originally posted by Black walnut View Post
                      We are all getting older. Have you had your hearing checked?
                      You could be right although my wife noticed it too and she has almost Volcan hearing
                      Turaj (in Toronto)
                      "When I read about the evils of drinking, I gave up reading!" Henny Youngman

                      Comment


                      • #12
                        Originally posted by Black walnut View Post
                        We are all getting older. Have you had your hearing checked?
                        Ha Ha Ha! Funny! That fits me to the "T"

                        I inherited a Stihl weed eater (FS36) a couple of weeks ago. I didn't even know that Stihl made weed eaters. IT had not been run in about 15 years, but being a Stihl, I decided to give it a cleanup. The needle valves were not set right. It took a bit but my hearing and memory of my hearing long ago helped me get it running sweet.

                        My hearing is going, but I can still distinguish between too rich and too lean in the sound pitch on 2 cycle engines!
                        Hank Lee

                        Experience is what you get when you don't get what you wanted!

                        Comment


                        • #13
                          Yeah, hearing a zipper of a dress going down and getting up to do something about it is a different matter as you get older, haha.
                          Loring in Katy, TX USA
                          If your only tool is a hammer, you tend to treat all problems as if they were nails.
                          BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questions

                          Comment


                          • #14
                            UPDATE

                            Managed to open the saw again on the weekend and cleaned it again. This time took the motor cap off (never done that in 20 years!) and indeed there were saw dust inside the cap. Used vacuum and air blower (as suggested by Loring) to fully get rid of the saw dust from the motor and the cap. Put everything back together and all is normal again (well, the saw, not me ).

                            Interestingly enough, I always thought that I was following the maintenance instructions by Jim Frye. I checked it again on the weekend and saw that he suggests removing the cap! So why have I not done this in the past??

                            Thanks for all the help, Turaj
                            Turaj (in Toronto)
                            "When I read about the evils of drinking, I gave up reading!" Henny Youngman

                            Comment


                            • #15
                              Hooray! One more for the good guys.
                              Loring in Katy, TX USA
                              If your only tool is a hammer, you tend to treat all problems as if they were nails.
                              BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questions

                              Comment

                              Working...
                              X