From: none@none.com99   
      
   On 2/3/2025 5:50 AM, Jim Wilkins wrote:   
   > "Bob La Londe"  wrote in message news:vnp9i2$sm3o$1@dont-email.me...   
   >   
   > ... I'll mostly run standard 5C collets, but   
   > having a chuck may save the day at some point.  The lathe did also come   
   > with an unused/uncut pie collet.  I'm not sure if I am looking forward   
   > to the day when that is the answer to a problem or not.   
   >   
   > --   
   > Bob La Londe   
   > CNC Molds N Stuff   
   >   
   > -------- My limited experience with 5C pot collets is that all but the   
   > shortest tubing, bushings etc should be held in axially as well by the   
   > tailstock, perhaps with a pipe center or large fender washer, and   
   > trimmed to length in the better restrained grip of a 6-jaw. I save hole   
   > saw and Greenlee cutouts for such purposes.   
      
   Most turret lathes don't have a proper tailstock.  The turret is the   
   tail stocks.  That being said I "also" have a removable tailstock turret   
   I use in the little 8.5x18 Harbor Freight lathe.  I do have a proper   
   set-tru 6 jaw that I almost always leave on the 14x40 Precision Mathews.   
      
      
   >   
   > I was given a "Precise SC 42" CNC spindle by a scrap dealer. Fischer USA   
   > emailed me the manual for it, which assumes it's connected to their   
   > controller and doesn't mention the motor drive specs.   
      
   I don't really know what that is?  Picture?  Sounds like a small high   
   speed high frequency 3 phase spindle from what I have read.   
      
   > Do you have any   
   > experience or suggestions concerning their electrical requirements?   
      
   Base voltage is probably at max frequency, but I wouldn't know for sure.   
     For example most of my high speed spindles are 230V at 400hz.  You can   
   probably get that from the manual.  I only found a couple mentions on   
   line with queries similar to yours.  If you are not sure of the wires   
   its pretty simple to find out.  If it has four wires one of them is   
   likely case ground and the other three are the legs of the windings.   
   After that you would need to find rotation.  There is a meter that can   
   help you find phase rotation.  I have one, but I don't know how to use   
   that feature.  I've always just the power on and off with any 3 phase   
   motor and if it runs backwards swapped any two leg leads.   
      
   Since I can't find specific information on exactly what it is I have to   
   guess that if there are other leads they would be for overheat sensor,   
   collet closed sensor, etc.   
      
   !!!Caution!!!  Some high speed spindles caution that you can damage them   
   by running them backwards. (and of course you can damage some kinds of   
   pumps if run backwards.)   
      
      
      
   > I'd   
   > be mounting it on the lathe in a milling attachment to do the indexed   
   > milling / drilling on large chucked work that I presently do on smaller   
   > pieces in a collet fixture on the mill.   
      
   I probably should make/finish a side milling spindle for the bigger   
   lathe one of these days.. and some indexing discs to go on the outboard   
   side.   
      
      
      
      
   --   
   Bob La Londe   
   CNC Molds N Stuff   
      
   --   
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