Servo Valve Diagnosis - Revision history

Mcone: /* Routine Maintenance for Servo and Proportional Valves */

2010-10-13T16:14:14Z

‎Routine Maintenance for Servo and Proportional Valves

2010-10-13T16:13:58Z

‎Routine Maintenance for Servo and Proportional Valves

2010-10-13T16:13:39Z

‎Routine Maintenance for Servo and Proportional Valves

2010-10-13T16:13:14Z

‎Routine Maintenance for Servo and Proportional Valves

2010-10-13T16:09:15Z

‎Signs of a sticking valve

2010-10-13T16:08:33Z

‎Routine Maintenance for Servo and Proportional Valves

2010-10-13T16:07:49Z

‎Fixes

2010-10-13T16:07:30Z

2010-10-13T16:06:50Z

‎Routine Maintenance for Servo and Proportional Valves

2010-10-13T16:06:31Z

‎Vickers Documentation

@@ Line 27: / Line 27: @@
 ==Routine Maintenance for Servo and Proportional Valves==
-Note: This information in this section is from the [http://www.servocontrolsindia.com/tcl_rm.htm Servo Controls of India Web Site]
+Note: The information in this section is from the [http://www.servocontrolsindia.com/tcl_rm.htm Servo Controls of India Web Site]
 <br>

@@ Line 27: / Line 27: @@
 ==Routine Maintenance for Servo and Proportional Valves==
-Note: This information in this section is from: [http://www.servocontrolsindia.com/tcl_rm.htm Servo Controls of India Web Site]
+Note: This information in this section is from the [http://www.servocontrolsindia.com/tcl_rm.htm Servo Controls of India Web Site]
 <br>

@@ Line 27: / Line 27: @@
 ==Routine Maintenance for Servo and Proportional Valves==
-Note: This information is from: [http://www.servocontrolsindia.com/tcl_rm.htm Servo Controls of India Web Site]
+Note: This information in this section is from: [http://www.servocontrolsindia.com/tcl_rm.htm Servo Controls of India Web Site]
 <br>

@@ Line 27: / Line 27: @@
 ==Routine Maintenance for Servo and Proportional Valves==
-This information was extracted from: [http://www.servocontrolsindia.com/tcl_rm.htm Servo Controls of India Web Site]
+Note: This information is from: [http://www.servocontrolsindia.com/tcl_rm.htm Servo Controls of India Web Site]
 <br>

@@ Line 13: / Line 13: @@
 # The axis oscillates
 # The axis overshoots then recovers by pulling back when it did not do so before.
-# The valve was pulled off the system then put back on - at which point it stopped working
+# The valve was pulled off the system then put back on - at which point it stopped working properly.
 <br><br>

@@ Line 23: / Line 23: @@
 # Change out the filter periodically
 # Leave the valve on the system if it is working well
 <br><br>
 ==Routine Maintenance for Servo and Proportional Valves==

← Older revision		Revision as of 16:07, 13 October 2010
Line 1:		Line 1:
	[[image:vickersservovalve.jpg]]		[[image:vickersservovalve.jpg]]
		+
		+	__TOC__

	Servo valves used in bend arms are very sensitive to contamination and require a lot of cleanliness to work properly. A 40 micron particle can cause a servo valve to "stick." (1 micron = 0.001 mm. 40 microns = 0.0016 inches) Even valves that are not completely stuck can act strangely if they are not completely clean.		Servo valves used in bend arms are very sensitive to contamination and require a lot of cleanliness to work properly. A 40 micron particle can cause a servo valve to "stick." (1 micron = 0.001 mm. 40 microns = 0.0016 inches) Even valves that are not completely stuck can act strangely if they are not completely clean.

@@ Line 79: / Line 79: @@
 . Adjusting the Null on a Valve.
 As stated in section 3, no other field adjustment exists on a valve other than the null adjustment.This is set at the factory and should not normally be disturbed. If a valve is indicating an excessive null drift, it may be indicative of contamination. The null adjustment allows the spool to be centered and thus limit any actuator motion when the valve electrical signal is zero. It is preferable to disconnect the valve connector when carrying out this adjustment.With critical axis cut spools, the null may drift slightly with temperature change and valve age. One to two percent drift is permitted as it will be corrected with the closed loop control in operation. For instructions on how to adjust the null of a valve, see individual valve series data sheets.
 ==Other==
 *[[CNC Bender Technical Notes]]
 *[[CNC Bender]]

← Older revision		Revision as of 16:06, 13 October 2010
Line 27:		Line 27:


−	~~==Vickers Documentation==~~

−	~~# [http://www.advancedtubular.com/cncbender/Vickers_General_Hydraulic_Hints_and_Trouble_Shooting_Guide.pdf Vickers General Hydraulic Hints and Trouble Shooting Guide]~~
−
−	~~# [http://www.advancedtubular.com/cncbender/Vickers_Contamination_Control.pdf Vickers Contamination Control Guide]~~
−
−	~~<br><br>~~

	==Routine Maintenance for Servo and Proportional Valves==		==Routine Maintenance for Servo and Proportional Valves==