Re: [CAD_CAM_EDM_DRO] Re: Home shop power for a big machine - Thanks for the input

Hi Roger,

Happy New Year!

Sorry it will not work out for you. Perhaps if there were some more details about the mill (location, make, model, travels, spindle speeds, spindle taper, etc.) someone else on the list may be able to use this machine.

Have a good day,

Jim

----- Original Message -----
From: vrsculptor
To: CAD_CAM_EDM_DRO@yahoogroups.com
Sent: Thursday, January 01, 2009 4:03 PM
Subject: [CAD_CAM_EDM_DRO] Re: Home shop power for a big machine - Thanks for the input


Hi All,
Many thanks for the comments. I am sure the machine has a VFD which
could do a low energy soft start if it were not for the working
Siemens PC-2100 controller. As was pointed out previously VMC's like
to do instant stops and starts. I don't know enough about the
controller to be confident that I could change the acceleration
deceleration curve.

If I chose to do an EMC2 retrofit, something I can do, I could lower
the acceleration and power spike. I would probably follow Jon's advice
and convert as much of the machine to single phase as I could. I'm
sure the head cooling fan, lube and coolant pumps are 3 phase so a low
power phase converter would still be required. I might be lucky and be
able to run the VFD on single phase but I doubt it as its 12 years old.

If I had to buy a VFD, Mesa interface boards, new terminations, a PLC
and maybe a single phase power transformer for the servo AMP's it
could cost upwards of $1.5-2K and a month or so to convert the
machine. I can't justify the purchase price, conversion cost plus a
selection of CAT40 tooling (I currently use Kwik Switch 300) for a
hobby machine.

I'll stick with my current Tree mill with it's two arm tool changer.

Thanks again and have a Happy New Year,
Roger





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