Rapid-Air RAPID LIGHT LOOP: RLL - Manual (Page 4)

3
CAUTION:
Keep clear of rotating hardware during thread up. Turn power off of take up reel during
thread up or place take up reel in the JOG mode. Make certain material is taut and
above RLL upper beam prior to power up.
Set the Payout/Rewind switch to Rewind on the Control Pwb of the RLL. This will
automatically switch light beam operation to give full speed at the bottom of the loop
and the motor to be full off if the top light beam is interrupted by material. Caution:
Remember to keep material taut in this mode during tread up keeping the motor of the
controlled device off. As the loop depth now becomes lower the motor speed will
increase and eventually the loop will be controlled between 12 and 18 inches from the
floor.
Turn on power on take up reel or place in run mode. The RLL will start auto control as
the material falls below the top light beam.
ADJUSTMENTS
RECEIVER BOARD 69100089 ASSY.
Refer to Fig. RLL-2
There is one potentiometer on each of the receiver boards. This is factory adjusted for
a 5 micro second pulse width TP-3 to TP-4. This alignment will need to be made only
if a receiver is damaged, replaced or if a support post is bent. Static adjustment in the
field maybe accomplished with a DVM. Adjust pot for 7.90 to 7.97 VDC as measured
between TP-3 and TP-4 on the receiver pwb. Please contact Rapid-Air prior to making
this adjustment.
INTERFACE CONTROL PWB 69100091 ASSY.
Refer to Fig. RLL-2
There are 2 user adjustable setpoints and 1 mode select switch on this assy. There
are 2 factory set pots on this assy. R43 is a Preset Ramp Voltage. R25 is a Ramp
Null.
Do not adjust R43 or R25.
JOGSPEED POTENTIOMETER R39
Adjust this pot to increase or decrease jog speed. Jog speed is attenuated by the % of
speed potentiometer on the controlled device.