JLG 800A_AJ Service Manual - Manual (Page 258)

SECTION 4 - BOOM & PLATFORM
4-44 – JLG Lift – 3120858
3. Set the ramp up and the down times. Step 2 must be
completed before continuing with this procedure.
Power up the card, but do not start the engine. Place
the current meter in series with the "A" output. Turn
the input potentiometer to its extreme position and
operate the telescope function. watch the meter for
the time it takes the output to go from 0 current to
maximum current. This is ramp up time. Adjust P1
until this time matches the time in Table 4-3. Rotating
the adjustment potentiometer clockwise will
increase ramp time. To set the ramp down time, hold
the telescope function switch and watch the time it
takes the output to go from the maximum current
down to 0 current. This is the ramp down time.
Adjust P2 until this time matches the setting time in
Table 4-3. Rotating the adjustment potentiometer
clockwise will increase the ramp time.
Table 4-2. Ramp Current Setting Range
FUNCTION
MINIMUM
CURRENT
MAXIMUM
CURRENT
UPPER LIFT UP 450 to 550 mA 1300 to 1500 mA
UPPER LIFT DOWN 450 to 550 mA 1700 to 2000 mA
(Set 450 mA higher
than Upper lift)
SWING RIGHT 450 to 550 mA 1000 to 1300 mA
SWING LEFT 450 to 550 mA 1100 to 1300 mA
(Set 100 mA higher
than swing right)
FLOW CONTROL 750 to 850 mA 1100 to 1300MA
(Set using Main Tele)
DRIVE FORWARD 20 to 60 mA 130 to 160 mA
DRIVE REVERSE 20 to 60 mA 130 to 160 mA
Figure 4-22. Control Card
Table 4-3. Ramp time Setting
FUNCTION RAMP TIME
Lift Up Ramp UpTime = 5:00 sec.
Ramp Down Time = 3:00 sec.
Lift Down Ramp Up Time =5:00 sec.
Ramp Down Time =3:00 sec.
Swing Right Ramp Up Time =7:00 sec.
Ramp Down Time =3:00 sec.
Swing Left Ramp Up Time =7:00 sec.
Ramp Down Time =3:00 sec.
Drive Forward Ramp Up Time =4:30 sec.
Ramp Down Time = 2:30 sec.
Drive Reverse Ramp Up Time = 4:30 sec.
Ramp Down Time = 2:00 sec.
Flow Control Ramp Up Time =3:00 sec.
Ramp Down Time =0.00 sec.