385B Excavator Gain/Response Control Caterpillar

The controllability of this machine can be changed in order to match the machine to a particular job. The controllability is changed by setting the gain and/or the response to different settings.

Gain - Gain is the relationship between the stroke of the joysticks or the travel levers/pedals and the operation speed of the actuators.

The gain can be adjusted to seven stages.

When you change the gain, it is possible to lengthen and it is possible to shorten the range of fine control of the joysticks or the travel levers/pedals.

Note: If the gain is set to the maximum setting, the speed of the actuators will become faster with only a small movement of the joysticks or the travel levers/pedals. This occurs because the range of fine control becomes minimum.

Note: If the gain is set to the minimum setting, the speed of the actuators will become slower even though the stroke of the joysticks widens or the stroke of the travel levers/pedals widens. This occurs because the range of fine control becomes maximum. However, when the stroke of the joysticks or the travel levers/pedals is maximum, the actuators can obtain maximum speed.

Response - Response specifies the response of the actuators to the operation of the joysticks or the travel levers/pedals.

It is possible to adjust the response to the three following stages:

• Slow

• Medium

• Fast

With changing the response, it is possible to select the speed of your preference.

Illustration 1	g00579625

The gain/response switch is on the right console near the engine speed dial.

Gain/Response Switch (1) - Push this switch in order to change the controllability of the machine. There are three possible settings that can be chosen.

Gain/Response Indicator (2) - These indicators show the position of the gain/response switch.

The gain and response can be changed in order to meet the needs of the operator. Consult your AVSpare dealer in order to change the presets of the gain/response switch.

Soft - Select this mode for more controllability of the implements. The gain and response are initially set at the following values:

• Gain is set at "4".

• Response is set to "MEDIUM".

Normal - Select this mode for normal control of the implements. The gain and response are initially set at the following values:

• Gain is set at "4".

• Response is set to "FAST".

Note: NORMAL position cannot be changed to any other combination of gain and response.

Quick - Select this mode for quick control of the implements for fast cycle times. The gain and response are initially set at the following values:

• Gain is set at "5".

• Response is set to "FAST".

Setting the Gain/Response

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Illustration 2	g00811084

1. Turn the key start switch to the ON position. The default screen will show.
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   Table 1

   		MAIN MENU
   	1:	"PREFERENCES" MENU
   	2:	"EVENT" MENU
   	3:	"SYSTEM" MENU
   	4:	"SERVICE" OPTIONS
   	5:	"PERFORMANCE" MENU

2. Press the menu button on the keypad. The main menu screen will be displayed.

3. Select option "4" ("service options") and press the OK key or press "4" on the keypad.
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   Table 2

   		"SERVICE OPTIONS"
   	1:	"START MANUAL LUBE"
   	2:	"PERFORM CALIBRATION"

4. Select option "2" ("perform calibration") and press the OK key or press "2" on the keypad.

5. The option "SET CLOCK" will be displayed on the screen.

6. Use the left arrow key and the right arrow key to scroll through the menu. Stop scrolling when "GAIN/RESPONSE" is shown. Press the OK key.
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   Table 3

   		G/R SETTINGS
   	SOFT	1	SLOW
   	NORMAL	4	FAST
   	FAST	6	FAST

   Note: The "NORMAL G/R Settings" can not be changed. Only the "SOFT G/R Settings" and "FAST G/R Settings" can be changed.

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   Table 4

   		SOFT G/R SETTINGS GAIN
   		1
   		Press "< >" To Change
   		"Press OK"

7. Press the OK key. The "SOFT G/R Gain screen" will be displayed.

8. Press the "<" or the ">" key. This will change the value by one.

   Note: The number will not visually change as you push either "<" or ">". Exit the screen. Return to the same screen. The new numerical value will be shown.

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   Table 5

   		SOFT G/R SETTINGS RESPONSE
   		FAST
   		Press "< >" To Change
   		"Press OK"

9. Press the OK key. The "SOFT G/R Response screen" will appear.

10. There are three choices for response. The choices are SLOW, MEDIUM, or FAST. Highlight the desired response and press the OK key.

11. Follow the same procedure to set the GAIN and RESPONSE.