Getting Sound From Master & Slave Drives

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arunbabu Associate Join Date: Mar 2009 Location: India Posts: 48	Getting Sound From Master & Slave Drives 01/04/2011 5:17 PM
	250KW master slave siemens drive at running time getting some noise and also both drive current is getting varying. Before this problem drive was working normal. Both drives drawing same currents no noise from drive. please guide me that wht is the problem. __________________ Arun Babu
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Anonymous Poster	#1 Re: Getting Sound From Master & Slave Drives 01/04/2011 10:34 PM
	May be Salary evaluation is due for Slave, consequently raise the noise of argument with Master.......(still slaves in your country??)
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#2 Re: Getting Sound From Master & Slave Drives 01/05/2011 3:22 AM
	Please guide the forum as to what each one is driving. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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Stedou73ish Guru Join Date: Apr 2008 Location: 38th Parallel Posts: 750 Good Answers: 19	#4 In reply to #2 Re: Getting Sound From Master & Slave Drives 01/06/2011 12:20 PM
	PWSlack is correct. The device that the drives run needs to be explained. Pumps is there a blockage in a line. Supply fans / Return fans is there duct separation. conveyors are the roller bearings failing on the tracks. Meg the motors is there an insulation brake down in the Bakelite? __________________ To be or not to be........ok that's a trick question.
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Bill H. Power-User Join Date: May 2007 Location: Hurst, Texas Posts: 178 Good Answers: 4	#3 Re: Getting Sound From Master & Slave Drives 01/06/2011 11:37 AM
	Is this a gantry type of machine? If so alignment between each side is critical. Could be slop from wear or crash. Need more info on configuration. __________________ Bill H.
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Florence Member Join Date: Nov 2009 Posts: 6 Good Answers: 2	#5 Re: Getting Sound From Master & Slave Drives 01/09/2011 8:43 AM
	Are the drives slaved on analogue signals - if so, noise on this line could cause jitter resulting in higher motor currents. Has a shield to wiring got disconnected? Is there a soft analogue filter you can esaily adjust to a longer timebase? If you check the reference signal, and it is changing alot, this should be the problem and the drive is trying to follow it doing more work. If the reference is steady but the output varying alot, there may be a setup problem in the VFD control or its feedback from the motor.
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Anonymous Poster (1); Bill H. (1); Florence (1); PWSlack (1); Stedou73ish (1)

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