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  • #31
    RE: the 440V VFD output. The cheap VFD on my mill is a huanyang clone from ebay which will run a 440V 3ph motor from 220v single phase. You tell the VFD what the nominal output voltage is via one of the configuration settings.

    Dan
    At the end of the project, there is a profound difference between spare parts and left over parts.

    Location: SF East Bay.

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    • #32
      Originally posted by Tundra Twin Track View Post
      .................................................. ........I’ve heard great things about Cubetron ,VSM Abrasives just released a new belt this past April called Actirox, it suppose to be a step up from there Ceramic Plus that’s Cubetron equivalent.The Actirox only available in 36 grit,more selection is on the way.
      One of the advantages of variable speed drives is that the faster the abrasive moves-------------- the Finer the finish.
      When grinding Slitter knives (Carbide) at work , we just increased the grinder spindle speed to go from roughing to finish the grind...same with a sander !

      Rich
      Green Bay, WI

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      • #33
        Originally posted by danlb View Post
        RE: the 440V VFD output. The cheap VFD on my mill is a huanyang clone from ebay which will run a 440V 3ph motor from 220v single phase. You tell the VFD what the nominal output voltage is via one of the configuration settings.

        Dan
        Thanks Dan,that’s good to know the 1-1/2 hp 1ph is already installed and will try it with that for now.Did you bypass all your switch’s and control directly from VFD.Could you post a link or pic of the model you have.
        Originally posted by Rich Carlstedt View Post

        One of the advantages of variable speed drives is that the faster the abrasive moves-------------- the Finer the finish.
        When grinding Slitter knives (Carbide) at work , we just increased the grinder spindle speed to go from roughing to finish the grind...same with a sander !

        Rich
        Thanks Rich no experience with Belt Grinders,just a 24” Disc Grinder that works very good.The 3ph motor can be reinstalled easily,so appreciate insight on higher speeds.I have read using smaller rollers speed should be a little slower,the rollers on top of Platen are less than 7/8” in dia.
        Last edited by Tundra Twin Track; 11-29-2021, 12:11 AM.

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        • #34
          Originally posted by Tundra Twin Track View Post



          Sorry my mistake, it’s a single speed motor.Does anyone build a VFD that can go 1ph to 440 volt3ph without a transformer?


          Yes it appears very well built,be nice to leave Original motor but I will wait and see what VFD options are.



          Yes the one one wheel has abrasive side on it,talked to Nexus Belt Grinder Guy and he has one configuration that does that with no issues.Machine is 1983 and all coating on Wheels has separated from Aluminum Wheel,will be dropping wheels off tomorrow to be recoated.The durometer will be a guessing game possible 70,I’m open to ideas on that.
          If I read that data plate correct it's a 3 phase 1.1kw motor, which is a bit under 1.5hp, it's 440 volt and draws 2.5 Amps. Motor spins at 3400 rpm @ 60 cycles input. Should be easy to swap in a little single phase motor to get the job done without much hassle. And that's a really nice machine, too, (Zimmermann PS-0?) so I'll throw in the obligatory "you suck" while I have the opportunity 😀.

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          • #35
            Originally posted by tom_d View Post

            If I read that data plate correct it's a 3 phase 1.1kw motor, which is a bit under 1.5hp, it's 440 volt and draws 2.5 Amps. Motor spins at 3400 rpm @ 60 cycles input. Should be easy to swap in a little single phase motor to get the job done without much hassle. And that's a really nice machine, too, (Zimmermann PS-0?) so I'll throw in the obligatory "you suck" while I have the opportunity 😀.
            Yes it’s Zimmerman PS 0,the 1ph motor already installed the Machine is in nice condition. Click image for larger version

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            • #36
              Originally posted by Tundra Twin Track View Post

              Yes it’s Zimmerman PS 0,the 1ph motor already installed the Machine is in nice condition.
              You found a good machine, and you're quick to be making good use of it. Nice! (yeah.....color me jealous)

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              • #37
                Originally posted by danlb View Post
                RE: the 440V VFD output. The cheap VFD on my mill is a huanyang clone from ebay which will run a 440V 3ph motor from 220v single phase. You tell the VFD what the nominal output voltage is via one of the configuration settings.

                Dan
                so.. it voltage doubles via a config setting?

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                • #38
                  Does anyone build a VFD that can go 1ph to 440 volt3ph without a transformer?
                  Not from 240. Rectified single phase 240 gives you about 380v to work with on the DC buss inside the VFD.

                  IF Lakeside's onto something with the voltage doubler, it's something I haven't seen-
                  doubling is not traditionally done on heavier loads due to ripple and power factor.
                  But my experience is with older, larger format VFDs.

                  If the motor would run on somewhat lower voltage- most do, with a minimal peak torque derate-
                  and the VFD would generate it, then off you go.

                  But honestly, a refit doesn't look ugly, either, and lets you use an inexpensive VFD easily.

                  Yes, there's just a little suckage there, as my belt sander's a cheap POS.

                  t

                  rusting in Seattle

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                  • #39
                    You could take it to a rewinding shop and have it rewound to 240v 3ph. When I had my shop I did it many times
                    Helder Ferreira
                    Setubal, Portugal

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                    • #40
                      Originally posted by lakeside53 View Post

                      so.. it voltage doubles via a config setting?
                      Originally posted by Tobias-B View Post

                      Not from 240. Rectified single phase 240 gives you about 380v to work with on the DC buss inside the VFD.

                      IF Lakeside's onto something with the voltage doubler, it's something I haven't seen-
                      doubling is not traditionally done on heavier loads due to ripple and power factor.
                      But my experience is with older, larger format VFDs.

                      If the motor would run on somewhat lower voltage- most do, with a minimal peak torque derate-
                      and the VFD would generate it, then off you go.

                      But honestly, a refit doesn't look ugly, either, and lets you use an inexpensive VFD easily.

                      Yes, there's just a little suckage there, as my belt sander's a cheap POS.

                      I looked up a lot of VFD’s never seen one that did the 440 volt from 1 ph.
                      Originally posted by Noitoen View Post
                      You could take it to a rewinding shop and have it rewound to 240v 3ph. When I had my shop I did it many times
                      Cost wise the rewinding would not be feasible,the local place only rewinds specialty and large motors,I’m sure their shop rate would be $150+ per hour.

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                      • #41
                        Originally posted by Tundra Twin Track View Post
                        Cost wise the rewinding would not be feasible,the local place only rewinds specialty and large motors,I’m sure their shop rate would be $150+ per hour.
                        Im not even sure if 10hp motors are cost effective to be rewound anymore and it’s probably more like 20+.

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