Announcement

Collapse
No announcement yet.

Lathe motor options.

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

  • Lathe motor options.

    I have a Logan lathe with a GE 1/2hp motor on it. I thought about a 3phase motor, the cost does not seem to make sense vs a servo. I found a 3/4hp variable speed servo for about 100$ shipped with the pulley included. It serves as a slight upgrade to the original motor and from what I have read it makes it much much quieter than a cheapo vfd.

    Any opinions and or thoughts? This is the motor I am looking at.

    https://m.ebay.com/itm/Eagle-EL-550-...-/162604896597
    12x16" Delta 3d printer (Built from scratch)
    Logan 825 - work in progress
    My Blog - http://engineerd3d.ddns.net/
    Youtube Channel - https://www.youtube.com/channel/UCVY...view_as=public
    Instagram - https://www.instagram.com/engineerd3d/?hl=en

  • #2
    Likely work fine.

    I put a 3P motor on mine, DC drives work too.
    1601

    Keep eye on ball.
    Hashim Khan

    Comment


    • #3
      I would think that a Logan would be a likely candidate for a treadmill motor and speed control swap project.
      Chilliwack BC, Canada

      Comment


      • #4
        Hi
        This looks like an ideal replacement with more power and variable speed. You will need to fit pulleys to the motor and counter shaft to bring the counter shaft speed to around the same RPM.
        The original motor is probably 1750 RPM with the servo at 3450 rpm is nearly double the speed.
        If you use "Poly Vee Belts"and pulleys the motor pulley can be as small as 30 mm diameter on a "J"section belt. Less belt slip at slow speeds and more compact than Vee Belts.
        Totally biased opinion on "Poly Vee Belts" as I have almost all workshop machines on Poly Drives.

        Eric
        Last edited by velocette; 04-28-2018, 05:40 PM. Reason: Added Info

        Comment


        • #5
          This may be a good option for my surface grinder as well. Time will tell.
          12x16" Delta 3d printer (Built from scratch)
          Logan 825 - work in progress
          My Blog - http://engineerd3d.ddns.net/
          Youtube Channel - https://www.youtube.com/channel/UCVY...view_as=public
          Instagram - https://www.instagram.com/engineerd3d/?hl=en

          Comment


          • #6
            I've used this exact commercial sewing machine servo motor on 10" Atlas lathes & they work great. They are actually DC motors running on AC with variable speed, reverse, a plug for a light & Brake if you want. Can't beat them for the $$ IMHO.
            "Let me recommend the best medicine in the
            world: a long journey, at a mild season, through a pleasant
            country, in easy stages."
            ~ James Madison

            Comment


            • #7
              What is the objective - existing doesn't work? You'll get variable speed, but you know you also need the mechanical transmission get the HP over the speed range.

              Exercise some care in replacing a surface grinder motor. OEM's are very well balanced, there should be a noticeably less vibration than a typical motor. There's imo good reason to put a vfd on a surface grinder: soft start and slow down so as to no jar wheel out of balance...but mines 600V so i need a vfd and a transformer, haven't got there yet. 3P is preferred on a grinder to minimize torque ripple. Especially on a light grinder, you've got to chase down all the sources of vibration to get great finishes
              Last edited by Mcgyver; 04-29-2018, 09:40 AM.
              .

              Comment


              • #8
                One thing to keep in mind is you will need to fabricate a method to throttle the motor. These come with an electronic "pedal" lever. After turning the controller on, you must activate the motor through the pedal and stop by releasing the pedal. The speed dial on the controller sets the Maximum speed. The pedal controls motor on/off and speed up to the maximum set by the speed dial. Consider a notched lever that can be released quickly. Just a thought.

                What's good about these motors is that they provide full torque throughout the speed range.

                Comment


                • #9
                  Would these motors be a good candidate for a welding positioner?

                  Comment


                  • #10
                    Originally posted by Mcgyver View Post
                    What is the objective - existing doesn't work? You'll get variable speed, but you know you also need the mechanical transmission get the HP over the speed range.

                    Exercise some care in replacing a surface grinder motor. OEM's are very well balanced, there should be a noticeably less vibration than a typical motor. There's imo good reason to put a vfd on a surface grinder: soft start and slow down so as to no jar wheel out of balance...but mines 600V so i need a vfd and a transformer, haven't got there yet. 3P is preferred on a grinder to minimize torque ripple. Especially on a light grinder, you've got to chase down all the sources of vibration to get great finishes
                    My surface grinder is using a non own motor. My question is would this motor be more balanced than my old craftsman 3/4hp monster I have bolted to the grinder.
                    12x16" Delta 3d printer (Built from scratch)
                    Logan 825 - work in progress
                    My Blog - http://engineerd3d.ddns.net/
                    Youtube Channel - https://www.youtube.com/channel/UCVY...view_as=public
                    Instagram - https://www.instagram.com/engineerd3d/?hl=en

                    Comment


                    • #11
                      Originally posted by flylo View Post
                      I've used this exact commercial sewing machine servo motor on 10" Atlas lathes & they work great. They are actually DC motors running on AC with variable speed, reverse, a plug for a light & Brake if you want. Can't beat them for the $$ IMHO.
                      This is exactly what I was looking for. Sounds like a good upgrade.
                      12x16" Delta 3d printer (Built from scratch)
                      Logan 825 - work in progress
                      My Blog - http://engineerd3d.ddns.net/
                      Youtube Channel - https://www.youtube.com/channel/UCVY...view_as=public
                      Instagram - https://www.instagram.com/engineerd3d/?hl=en

                      Comment

                      Working...
                      X