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Control Valve Settings for Self-Propelled Sprayers (Continued)
Flow Control
Valve or
Sprayer Model
(and year if
applicable)
Walker
Pump Servo
*Adjust this number to fit your particular configuration. Refer to the Application section in the InSight
User Manual for more information on adjusting this response threshold.
**If you are using a PWM control valve, some adjustment may need to be made to achieve optimal pump
response to the PWM gain value. Increase the Gain value to make the system more responsive;
decrease the Gain value to smooth the system response.
L
S
IQUID
ERVO
• Valve Response 1
Default Value: 100%
Determines the speed of the servo valve when product control error exceeds the Response Threshold
setting.
Decreasing the value will cause the servo valve to run slower.
• Valve Response 2
Default Value: 24%
Determines the speed of the servo valve when product control error is less than the Response Threshold
setting.
Decreasing the value will cause the servo valve to run slower.
• Allowable Error
Default Value: 2%
Determines the percent of error that is allowed prior to the product control system making any flow rate
corrections.
2% - 3% is the normal dead band setting range.
- Too low of a setting value can cause the product control system to continually hunt for the target
application rate.
- Too high of a setting will cause excessive product application error.
• Response Threshold
Default Value: 3
Determines where the control system switches between using Valve Response 1 or Valve Response 2
speed setting.
Leaving all other valve control settings at the default value and making a small adjustment to this setting is
usually all that is required to fine tune system performance.
- Decreasing this value will have the overall effect of speeding up servo valve response.
- Increasing this value will have the overall effect of slowing servo valve response.
124
PWM
Control System
Frequen
cy
S
D
ETTINGS
Typical
Zero
Gain
Offset
Range
ESCRIPTION
Valve
Valve
Allowabl
Respon
Respon
e Error
se
se
1
2%
100%
24%
Respon
se
Thresho
2
ld
3
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Table of Contents
Troubleshooting
