Journeyman 325 tree mill phase converter

[ramsey321]

All I am trying to figure out what kind of rotary phase converter i need for my 325 tree mill. I was told i need a phase converter that keeps the voltage from varing plus or minus 5%. Can anyone tell me if this is true or can i use just a regular 5 hp rotary phase converter. Help please!!!

[lavrgs]

Based on what I have read CNCs require tighter control on the voltage. But there are many phase converters that will do the job. I used a 7.5HP version from Anderson www.andersonconverters.com In therory it should run my 325 and lathe at the same time if I ever get around to making a box that allows me to plug them both in. Of coarse you don't want to start them at the same time but that would be difficult for me...

[ramsey321]

Thanks for the reply. Does the 7.5 rotary phase converter that you have work ok for your Tree mill or should i get a 10HP? What power do you have hooked up to it. Is IS 220.

[lavrgs]

The Anderson 7.5 HP that I got works very well on my Tree J325. I have the 6000 rpm motor and have replaced the Motor drive with an Emerson Spindle drive so your mileage may vary. Anderson recommends that for a cnc machine you get a converter rated at twice the horsepower and I used 3 not 5 as the HP to double. Bottom line is that I have no problem with the set up. The converter arrived with no plugs, so I needed to get a plug for the wall side and the output side and yes it is 220. I have 220 single phase in the shop and I convert to 3 phase.

[SmoothMove]

I have a 10hp RPC from Amercian Rotary. Works fine so far on my Tree 325, and runs super quiet.