On 07/15/2020 08:51 PM, John Dammeyer wrote:
For that price, rip out the guts and replace the works with COTS units.  You 
end up with single phase.  Possibly only a 3HP spindle but do you need a bigger 
one?  The Chinese AC Servos appear to be pretty good.  Even the squeal problem 
from my spindle 1.8kW motor was a parameter error.  Quickly solved.


That's a SERIOUSLY large machine! Various units may have different spindle motors, but at least one was 10 Hp. Probably several HP axis motors. Note the nameplate shows a 29 KVA load!

Jon




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