No announcement yet.

Level pads and converters

  • Filter
  • Time
  • Show
Clear All
new posts

  • Level pads and converters

    Thanks to all for the advice on the Milling machine ( Excello #602) . I downloaded the owners manual from the web site, and it will be on the nightstand for some light reading. I am preparing for it's arrivial and ordered some items from Travers. One item is a set (4ea) leveling pads. They have a ball and socket arangement and a rubber pad on the bottom. They are 3.5" wide and have a 3/4" X 12 TPI stud. I got the ones with the largest capacity, 4500lbs ea. (item #83-044-505) . The concern I have is: will they will tranfer vibration or they will be OK. My plan is to use some 1.5" X 2" CRS stock to give the machine a bigger foot print. My community college used this technique with good success. The other question is the phase converter. I am going to run 10-3 wire from the breaker box to the converter. The problem is there isn't a distinct " IN " and "OUT " on the schematic. There is a silver junction box on the top of the phase converter and it has an A, B, C binding post arangement. It seems that if I put the wires under the same post, it would negate the phase converter. The converter is a Phase-A-Matic, 3/4 - 1.5 hp. Travers #85-202-012. Any thoughts?

  • #2
    Maybe try Phase-a-matics installation instructions,located here-
    I just need one more tool,just one!


    • #3

      METHOD #1

      Using the PHASE-A-MATICâ„¢ Static Converter only will produce approximately 2/3 normal HP.* This method is inexpensive, the most popular, provides excellent results on most machines tools and numerous other uses. Motor speed is not changed. Most two-speed motors, power feeds, coolant pumps, etc., will operate normally. Motor will instant reverse. There is nothing to change. All switch gear will work normally.

      *Refers to wye-wound motors; delta-wound motors will run at 50% rated HP. Delta-wound motors are very rare in the USA, occasionally being found on some imported equipment, and are particularly found on German and Italian machines.

      METHOD #2

      ~~ Configure as a rotary converter using Phase-A-Maticâ„¢ static unit ~~

      Full or close to full HP can usually be obtained by running a three-phase motor and PHASE-A-MATICâ„¢ Static Converter combination as shown on the Installation Instructions. When running unloaded, the windings of the motor function as a rotary transformer or generator while consuming very little extra power. The Idler Motor needs to be at least 50% larger than the largest motor that you want to run to accommodate the higher starting current. A good quality 3600 RPM, three phase wye-wound, 220V motor is the best choice. 1800 RPM motors can be used on applications not heavily loaded. Used three-phase motors are inexpensive and readily available.

      When using this method, it is possible to run multiple machines as long as the idler motor is large enough to handle the largest load it would ever have at any one time. For instant reversing of the load motor, as in rigid tapping, the idler motor must be a minimum of twice the HP rating of the load motor, and perhaps more.

      The Static Converter is sized to the HP of the idler motor, not the load motor(s).

      [This message has been edited by CCWKen (edited 01-01-2006).]


      • #4
        next statement, make sure your transfromer is on the line legs instead of the generated leg...

        voltage flutuates.. causes trouble..
        Excuse me, I farted.


        • #5
          If they're leveling pads only, it doesn't much matter what size you get. If they're grossly oversize your bench may remind you of a ballerina in galoshes, but, so what. If they're meant to be vibration isolation pads, you should size them to the load. If you have 4500 pound pads with a 100 pound load on top, they'll be much too stiff to do much isolating. On the other hand, except in pathological cases, they won't make things any worse.

          [This message has been edited by sauer38h (edited 01-01-2006).]