Color steel tile press machine common problems troubleshooting methods
There are indicator lights on the PLC controller in the control box of the color steel tile press machine. Normally, it should display: POWER green light on, RUN green light on
.IN: input indication,
0 1 light flashes frequently when the counter rotates, 2 lights are on in automatic state, 3 lights are on in manual state. 6 lights are on when the knife is lowered and hits the limit switch, 7 lights are on when the knife is raised and hits the limit switch. When the automatic is turned on, 7 lights must be on to run. 2 and 3 lights cannot be on at the same time. If they are on at the same time, it means that the automatic switch is broken or short-circuited. 6 and 7 lights cannot be on at the same time. If they are on at the same time, it means: 1 The travel switch is connected incorrectly, 2 The travel switch is broken; 3, X6 and X7 are short-circuited.
A: Manual can work, automatic cannot work
Reason:
1 The number of sheets cut is greater than or equal to the set number of sheets
2 The number of sheets or length is not set
3 The automatic switch button is damaged
4 The cutter has not risen and hit the travel switch. Or it touches the travel switch, but there is no signal, and the input terminal 7 light is not on.
Solution:
1 Clear the current number of sheets {press the ALM key}.
2 When the automatic switch is in the open position, the IN terminal 2 light on the PLC is not on {can be replaced by any brand of LAY3 series knob}
3 The travel switch is broken or the line from the travel switch to the electric box is broken.
4 When none of the above reasons exist, check: set the number of sheets and length, clear the current length, the cutter rises to the upper limit, the PLC input terminal 7 is on, turn on the automatic switch, and check whether the line voltage is normal according to the drawing
B: Manual and automatic do not work and the display screen does not show:
Reason:
1 The power supply is abnormal. When the voltmeter shows below 150V, the working voltage cannot be reached and the electric cabinet cannot be started
2 The fuse is blown
Solution:
1 Check whether the three-phase power input is 380V and whether the neutral line is connected properly.
2 Replace and check whether the solenoid valve line is damaged. {Fuse model 6A}
C: Neither manual nor automatic works, the voltmeter shows below 200V, and the display shows
Reason:
Neutral line is broken
Solution:
Check the external neutral line of the computer
D: As long as the automatic cutter is turned on, it will go up (or down)
Reason:
1 The upper limit switch is broken.
2 The solenoid valve is stuck
Solution:
1 Check the travel switch and the connection from the travel switch to the electrical box
2 Turn off the oil pump and use a screwdriver to push the manual reset pin of the solenoid valve back and forth from both ends of the solenoid valve. Stop when you feel elasticity.
3 If the solenoid valve is often stuck, change the oil and clean the solenoid valve.
﹡ If the solenoid valve is stuck, you should first push it from the shallow end to the other end, then push it back and forth from both ends to move it
E: When manual or automatic, the solenoid valve indicator light is on but the cutter does not move:
Reason:
The solenoid valve is stuck or damaged.
There is less oil in the mailbox
Solution:
1Replace or clean the solenoid valve
2Add hydraulic oil
F: Manual does not work but automatic works
Reason:
The manual button is damaged
Solution:
Replace the button
G: The POWER light on the PLC flashes slowly
Reason:
1. The fuse is blown
2. The counter is damaged
3. 24V+ or 24V- weak current is mistakenly connected to the strong current.
4 There is a problem with the control transformer
Solution:
1Replace the fuse
2Replace the counter
3Check the circuit according to the drawing
4 Replace the transformer
H: After power on, press the oil pump to start, and the power switch trips
Reason:
1 The live and neutral wires of the power supply are not connected by three-phase four-wire, and the neutral wire is taken separately from another place
2 The power supply is three-phase four-wire, but it is controlled by a leakage protector
Handling method:
The power supply is controlled by a three-phase four-wire circuit breaker.
The leakage protector reacts sensitively to leakage current. As soon as the electric cabinet is started, the protector will trip. Replace the leakage protector with a circuit breaker, or replace the leakage protector that allows a large leakage current and a slightly longer reaction time.
I: After the power is turned on, the solenoid valve is started, and the fuse is broken
Reason:
The solenoid valve coil is short-circuited
Handling method:
Replace the solenoid valve coil.
J: The knife does not move up and down
Reason:
1 The limit switch signal lights 6 and 7 are on
2 The solenoid valve light is on, but the knife does not move
Handling method:
1, Check the limit switch
2, The solenoid valve is faulty, blocked, stuck, less oil, or damaged. Replace or clean the solenoid valve
K: How to deal with inaccurate dimensions:
Inaccurate dimensions: First check whether the encoder pulse number described in the fourth part above matches the setting of the electric box, and then check as follows:
Check whether the current length on the display screen matches the actual length when the machine is stopped
Conform: This situation is generally caused by the actual length > set length,
which is caused by the large inertia of the machine. Solution: Use compensation reduction or adjust the outer wheel coefficient described above. If there is a frequency converter model, the deceleration distance can be appropriately lengthened.
Inconsistent: Check whether the current length matches the set length
Conform: The actual length > set length, the error is greater than 10MM, this situation is generally caused by the loose installation of the encoder wheel, check carefully, and then reinforce the encoder wheel and bracket, it will be fine. If the error is less than 10mm, there is no frequency converter model, if the equipment is old, adding a frequency converter will solve the inaccurate phenomenon, if there is a frequency converter model, the deceleration distance can be lengthened, and the encoder installation can be checked.
Inconsistency: The set length, current length, and actual length are all very different and irregular. Check whether there are electric welders, signal transmitters, and receivers on site. If not, it is possible that the encoder is broken or the PLC is broken. Contact the manufacturer.
Matters to be noted when operating the color steel tile press equipment
1 Pay attention to safety when the equipment is live.
2 Do not put your hands or foreign objects into the blade at any time.
3 The electrical cabinet should be protected from rain and sun; the counter should be protected from hard objects; the wire should be protected from being broken by the board.
4 Lubricate the mechanical parts frequently.
5 Turn off the power when plugging and unplugging the aviation plug
