Hydmech M16A, Руководство пользователя

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3.9
12a.
Observe pilot light(s) on relevant valve.
If pilot light fails to go on, problem is
electrical.
12a.
This requires the attention of a qualified
service person.
12b.
If pilot light related to inoperative
function does light, problem may still
be the coil . If problem remains it may
result from dirt in the valve spool.
12b.
Disassembly of hydraulic valves should be
under taken only by qualified service
personnel or those knowledgeable with
hydraulic components.
13a.
Feed Rate Valve is fully closed -
pointer is set on "0" or close to "0"
in/min.
13a.
Turn Feed Rate Knob in a counter
clockwise to open valve.
13b. Feed Force Limit is set too low. 13b. Increase Feed Force Limit.
13c.
Check for physical interference
preventing the head from falling.
13c. Remove obstructions.
14a. No job queue programmed to run. 14a.
Enter job numbers(s) and job data as
described in Section 2.
14b. Pieces required equals pieces cut. 14b. Clear pieces cut.
PROBLEM PROBABLE CAUSE SOLUTION
Auto cycle will not start. 14
IN MANUAL MODE
IN AUTOMATIC MODE
13 Head will not descend.
12
No individual function will
respond to its manual
control switch.
NOTE:
1. The PLC is equipped with a lithium battery to keep the program stored while the power is shut down. The battery
will need to be replaced every 3 to 5 years, depending on usage. A visual warning will be displayed on the interface
when the battery drains to a certain level. Batteries can be purchased through your Hyd·Mech Distributor.
2. If the machine is equipped with an inverter, do not turn disconnect on for one minute after disconnect has been
shut off. Cycling power sooner than one minute will result in damage to the Variable Frequency Drive.
The PLC 500 uses input signals from limit switches , control panel switches, three rotary shaft encoders, and information
which is programmed into it, to supply accurate automatic length ,angle and saw function control as well as blade speed
and feed rate readout.
The inputs used include; a head down (head advance - V18A) limit switch, a head up limit switch (head retract - V18A),
and a head at 90 deg. limit switch. Also, the manual switches for head up (retract - V18A), and head down (advance -
V18A), front vise open / close, shuttle vise open / close, blade start / stop, coolant on / auto, and cycle start, all are inputs
to the PLC.
One rotary shaft encoder is attached to the shuttle assembly and travels with shuttle to provide length information to the
PLC. Another encoder is attached to the machine frame behind the head and is driven by a cable attached to the head
pivot drum. This encoder provides the PLC with head swing angle information. The third encoder is mounted beneath the
head carriage covers (on V18A) or behind the head cylinder cover (on M16/20A) and is cable driven to provide head feed
rate information to the PLC. A proximity sensor provides blade speed input.
The programmed information includes logic put into the PLC by its manufacturer, as well as information programmed into
it, through the keypad, by the machine assembly plant. The information programmed at the assembly plant is referred to
as the parameters. It is important that these parameters are correct for the PLC to be able to supply accurate lengths,
angles blade speed and feed rate display.
To view the parameters:
Start the machine and, in manual mode, enter the parameter screen by pressing the PARAMETERS key (F16). Type
the password which can be obtained from Hyd·Mech and press ENTER. Press parameters key again and the parameter
screen will appear.
MITSUBISHI PLC 500 TROUBLESHOOTING (For M16APC, M20APC and V18APC machines)