Replies

1. 
   migraine | Aug 04, 2004 08:18am | #1

   I have been using a rotory for most of the past 10+ years and the rule of thumb with "Phase a matic" is that on a 7 1/2 hp(which is probably what you will need) rotary converter is that you can run up to three times the horse power of the rated converter(3x7.5) as long as no single motor is over the 7 1/2 hp limit. Try contacting phase a matic, they are very helpful.

   One side note:  SCM is an Italian machine and their motors are ALOT more compact and slightly different that US motors.  So, that step-up trans former might be needed just to balance the legs of the windings, (If I can say it right, if not maybe someone else is more articulate than I am).  I owned a 9.5hp SCMI shaper that gave me alot of problems with "motor humm" when more than one machine was running when the shaper was on. My SCM3? sliding table gave me no problems with running it on a rotary converter.  I have since then sold both of these machines before moving, but I still have machines running on 3 phase in a single phase environment 

2. 
   MBL | Aug 04, 2004 09:26am | #2

   Dear friend,

   The dust collector might be a problem. That is because they run at full load on fully open intake.

   Single-phase to 3 phase converters do not produce a true 3 phase balanced voltage system. They have practical use on intermitent loads that do not pull full-load by the application.

   Those devices are not for full-load, full time runnig of the motors connected. The 'ratings' are based on the convenience of demand-factor considerations and typical load demands of most shop equipment.

   Another factor to consider, in addition to the odd voltages, is that they might be rated at 50 HZ and you are in the US at 60HZ?

   The cost of converting vs. the cost of what you could get for your needs at proper voltages ought to be considered, including resale and repair potential of equipment, and add-ons.

   Good luck.

   -mbl-

3. 
   roscoe | Aug 05, 2004 03:04pm | #3

   Thanks for your valued input. Nice to hear from someone that is using a phase converter with success.

   Roscoe

1. 
   TomMGTC | Aug 05, 2004 11:51pm | #4

   I use a rotary phase converter and it works great. I think the problem you will run into is with the voltage differences. Don't know as I have ever seen that done in a home shop setting.Tom

   Douglasville, GA