Need Help! Bridgeport/Romi Speed fluctuation - CNCzone.com-The Largest Machinist Community on the net!

Riverside192 · #1 12-01-2008, 12:30 PM

We have a Bridgeport Romi Lathe that has a speed problem. When programmed for a certain speed it runs about 10-15% slower than program. We have changed the encoder and checked for belt slippage. We can get it a little closer by changing the setting on the motor controller. I am of the opinion that the controller needs to be replaced . Anyone out there had a problem like this?Thanks D.

Wingin-It · #2 12-01-2008, 10:51 PM

Hello- I am a newb to CNC machinery. I hope to learn more. I wonder if
your service voltages and line draws of the motor are in specification.
Regards, Dan

machintek · #3 12-01-2008, 11:18 PM

There is a "gain" parameter for the spindle speed. I have to be in front of the machine to find it. But it is around parameter 71 I think.
Go to DOS, type in PFM.exe enter, cursor down to the parameter editor. cursor to the parameter needed, edit and save.

George

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