Yale Lodeking LT Series, Руководство по эксплуатации и техническому обслуживанию

Страница: 23 / 53

TROLLEY OPERATION & MAINTENANCE
23
P/N: 11854801 REV. AC
September 2017
LEARNING THE CONTROLS
After making certain the crane is completely and properly installed,
with the crane connected to the electrical service and all the
installation and start-up inspections made, the crane operator(s)
should learn and become acquainted with the controls.
On cranes having any or all motions electrically operated, the
operator should locate the runway disconnect and make sure this
switch is locked open (POWER OFF). The operator should now
operate the various push buttons to get the “feel” and determine
that they do not bind or stick in any position. The operator should
become familiar with push button location for their respective
motions as well as “start” and “stop” buttons (normally the top two
green and red buttons), which operate the crane main line contactor.
The mainline contactor will shut off power to all motions.
IF ANY PUSH BUTTON BINDS OR STICKS IN ANY POSITION
- DO NOT TURN THE POWER ON - DETERMINE THE
CAUSE OF THE MALFUNCTION AND CORRECT IT BEFORE
OPERATING THE CRANE.
LEARNING THE CONTROLS WHILE OPERATING
CRANE WITH NO LOAD
Having inspected and tried the control, the crane operator is now
ready to try the crane under power.
ALWAYS ALLOW THE TROLLEY TO COME TO A COMPLETE
STOP BEFORE CHANGING DIRECTION. ABRUPT CHANGE
OF TROLLEY DIRECTION WHILE IN MOTION MAY CAUSE
ADVERSE OPERATING CHARACTERISTICS OR DAMAGE TO
TROLLEY AND DRIVE COMPONENTS.
STEP 1.
Close the crane runway disconnect switch.
STEP 2.
Close the crane disconnect switch mounted on the crane. The
crane main disconnect switch is located in the bridge panel and
is operable from the front of the panel without opening the panel.
The switch is operated by rotating the handle. The “OFF” and “ON”
positions of the switch are marked on the switch assembly.
The bridge control panel also contains a 3-pole mainline contactor.
This contactor is connected in the electrical system on the load side
of the crane main disconnect switch, so that all the crane power
flows through this contactor. The mainline contactor is opened and
closed (turned off and on) by means of the stop- start buttons on the
pendant push button station. This stop-start circuit, as well as other
control circuits, typically operate at 115 volts. This 115 volt control
circuit voltage is obtained from a transformer mounted in the bridge
control panel.
STEP 3.
Press the start or green push button which will close the mainline
contactor, applying power to all control devices. The crane is now
ready for use.
STEP 4.
The drive motors on the trolley are controlled by inverters,
programmable variable frequency control. Standard programming
on Yale provided controls is two step infinitely variable. The motion
buttons on the pushbutton for the crane, typically labeled “FWD”
and “REV” are two step buttons, for this programming. The first step
is the initial starting speed of the crane and it also performs a speed
hold function. The second step of the button performs an
acceleration function.
To operate the crane, press the button for desired direction, FWD
or REV, to the first step. The crane will start moving and accelerate
to its programmed starting speed. Press the same button further
to the second step and the crane will accelerate up to full speed. If
the crane reaches a desired speed during this acceleration, back the
button off to the first step to hold that speed. If the crane is traveling
too fast and you wish to slow it down, release the motion button
completely and the crane will start to decelerate. Once the desired
slower speed is obtained, press button to the first step to hold
that speed. To bring the crane to a stop release the motion button
completely, the crane will decelerate to a stop and the holding
brakes will set.
Practice operating the crane in both directions, accelerating to
intermediate and full speeds, decelerating to a slower speed,
and bringing it to a stop. Get acquainted with the operating
characteristics of this crane, acceleration, deceleration and stopping
distances, to ensure smooth load movement, accurate load
positioning, and to minimize load swing.
NOTICE
IF DEFAULT SETTINGS FOR THE TROLLEYS VARIABLE
FREQUENCY CONTROL, INVERTER, DOES NOT MEET YOUR
SPECIFIC REQUIREMENTS IT CAN BE
RE-PROGRAMMED. PROGRAMMING OF THE
INVERTER SHALL BE DONE BY A QUALIFIED CRANE
TECHNICIAN PER THE MANUFACTURER’S
INSTRUCTION MANUAL. EACH CRANE HAS A MAXIMUM
SPEED SETTING BASED ON ITS CAPACITY, SPAN, DUTY
CLASSIFICATION, ETC. DO NOT EXCEED MAXIMUM SPEED
FOR WHICH THE CRANE WAS SPECIFIED WHEN ORDERED.
STEP 5.
The trolley motion buttons are typically labeled “Left” and “Right”.
The hoist motion buttons are typically labeled “Up” and “Down”.
Practice and become acquainted with these controls.
STEP 6.
Once the operator(s) are acquainted and comfortable operating the
crane and the hoist/trolley, they shall learn the Pre-Shift inspection
procedure. Refer to the INSPECTION section of this manual.
IF, WHEN DEPRESSING THE HOIST "UP" BUTTON, THE
HOOK SHOULD LOWER - STOP AT ONCE - DO NOT
ATTEMPT TO OPERATE AGAIN. REPORT THIS CONDITION
TO THE PROPER SUPERVISOR FOR CORRECTION WITH THE
INSTRUCTIONS FURNISHED WITH YOUR HOIST MANUAL BY
A QUALIFIED CRANE TECHNICIAN.
Set lower limit switches of the hoist and insure proper functioning
per the Hoist Manufacturer's Manual.
When operating the hoist in the up direction CAREFULLY OBSERVE
the relationship of the hook block and the bottom of the hoist frame.
The hoist upper limit switch, when working properly, should cause
the hoist up motion to stop and/or reverse direction.