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Rifles, Reloading, Optics, Equipment
Gunsmithing
Looking at some lathes and mills on auction
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<blockquote data-quote="SidecarFlip" data-source="post: 725584" data-attributes="member: 39764"><p>But is it a frequency drive? The LeBlond's used vacuum tube drives not IC's on the servo shifts. Big difference between them and a conventional chang gear drive. Most engine lates aren't speed controlled like the Servo Shift is....</p><p> </p><p>My Haas is also speed controlled but it's IC plus it has direct computer (convrsational programming). It's sensitive to input voltage and frequncy stabilization.</p><p> </p><p>The real impetus for stabilization is constant speed/torque delivery. My Kent surface grinder demands pure 60hz 3 phase for its stabilization electronics to deliver a true 3600 rpm spincle speed regardlss of wheel loading.</p><p> </p><p>Anyting is possibe but longevity wise, I tend to err on the side of reliability. All my machines cost big bucks so I'm partial I guess. I make my fun money with them.</p><p> </p><p>He could get by with static conversion/repowering to 220/1, rotary conversion but I have doubts that any VFD, unless rated properly will stand up to the high torque starts thar most lathes encounter... You got to get her spinning and thats where the runner meets the road.</p><p> </p><p>I've seen guys start 3 phase motors with a rope pull.... You get it spinning and the T3 leg self excites (if wye wound). Not ideal but doable.</p></blockquote><p></p>
[QUOTE="SidecarFlip, post: 725584, member: 39764"] But is it a frequency drive? The LeBlond's used vacuum tube drives not IC's on the servo shifts. Big difference between them and a conventional chang gear drive. Most engine lates aren't speed controlled like the Servo Shift is.... My Haas is also speed controlled but it's IC plus it has direct computer (convrsational programming). It's sensitive to input voltage and frequncy stabilization. The real impetus for stabilization is constant speed/torque delivery. My Kent surface grinder demands pure 60hz 3 phase for its stabilization electronics to deliver a true 3600 rpm spincle speed regardlss of wheel loading. Anyting is possibe but longevity wise, I tend to err on the side of reliability. All my machines cost big bucks so I'm partial I guess. I make my fun money with them. He could get by with static conversion/repowering to 220/1, rotary conversion but I have doubts that any VFD, unless rated properly will stand up to the high torque starts thar most lathes encounter... You got to get her spinning and thats where the runner meets the road. I've seen guys start 3 phase motors with a rope pull.... You get it spinning and the T3 leg self excites (if wye wound). Not ideal but doable. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Looking at some lathes and mills on auction
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